From d8e5774323d5408e119b5fa3cce1c73c7345e8f7 Mon Sep 17 00:00:00 2001 From: Michel Pollet Date: Tue, 24 Nov 2009 13:11:54 +0000 Subject: [PATCH] Initial Commit Signed-off-by: Michel Pollet --- .cproject | 209 ++++++ .gitignore | 5 + .project | 77 +++ .simavr.jcc | 140 ++++ COPYING | 674 ++++++++++++++++++ Makefile | 12 + README | 35 + include/avr_mcu_section.h | 55 ++ simavr/Makefile | 70 ++ simavr/cores/sim_core_declare.h | 45 ++ simavr/cores/sim_mega168.c | 43 ++ simavr/cores/sim_mega48.c | 43 ++ simavr/cores/sim_mega644.c | 240 +++++++ simavr/cores/sim_mega88.c | 43 ++ simavr/cores/sim_megax8.c | 45 ++ simavr/cores/sim_megax8.h | 209 ++++++ simavr/cores/sim_tiny85.c | 155 +++++ simavr/sim/avr_eeprom.c | 121 ++++ simavr/sim/avr_eeprom.h | 61 ++ simavr/sim/avr_ioport.c | 102 +++ simavr/sim/avr_ioport.h | 41 ++ simavr/sim/avr_spi.c | 82 +++ simavr/sim/avr_spi.h | 47 ++ simavr/sim/avr_timer8.c | 118 ++++ simavr/sim/avr_timer8.h | 49 ++ simavr/sim/avr_uart.c | 85 +++ simavr/sim/avr_uart.h | 49 ++ simavr/sim/sim_core.c | 1129 +++++++++++++++++++++++++++++++ simavr/sim/sim_core.h | 70 ++ simavr/sim/sim_elf.c | 174 +++++ simavr/sim/sim_elf.h | 53 ++ simavr/sim/sim_gdb.c | 66 ++ simavr/sim/sim_gdb.h | 25 + simavr/sim/simavr.c | 356 ++++++++++ simavr/sim/simavr.h | 313 +++++++++ tests/Makefile | 54 ++ tests/atmega88_example.c | 54 ++ 37 files changed, 5149 insertions(+) create mode 100644 .cproject create mode 100644 .gitignore create mode 100644 .project create mode 100644 .simavr.jcc create mode 100644 COPYING create mode 100644 Makefile create mode 100644 README create mode 100644 include/avr_mcu_section.h create mode 100644 simavr/Makefile create mode 100644 simavr/cores/sim_core_declare.h create mode 100644 simavr/cores/sim_mega168.c create mode 100644 simavr/cores/sim_mega48.c create mode 100644 simavr/cores/sim_mega644.c create mode 100644 simavr/cores/sim_mega88.c create mode 100644 simavr/cores/sim_megax8.c create mode 100644 simavr/cores/sim_megax8.h create mode 100644 simavr/cores/sim_tiny85.c create mode 100644 simavr/sim/avr_eeprom.c create mode 100644 simavr/sim/avr_eeprom.h create mode 100644 simavr/sim/avr_ioport.c create mode 100644 simavr/sim/avr_ioport.h create mode 100644 simavr/sim/avr_spi.c create mode 100644 simavr/sim/avr_spi.h create mode 100644 simavr/sim/avr_timer8.c create mode 100644 simavr/sim/avr_timer8.h create mode 100644 simavr/sim/avr_uart.c create mode 100644 simavr/sim/avr_uart.h create mode 100644 simavr/sim/sim_core.c create mode 100644 simavr/sim/sim_core.h create mode 100644 simavr/sim/sim_elf.c create mode 100644 simavr/sim/sim_elf.h create mode 100644 simavr/sim/sim_gdb.c create mode 100644 simavr/sim/sim_gdb.h create mode 100644 simavr/sim/simavr.c create mode 100644 simavr/sim/simavr.h create mode 100644 tests/Makefile create mode 100644 tests/atmega88_example.c diff --git a/.cproject b/.cproject new file mode 100644 index 0000000..0bfb771 --- /dev/null +++ b/.cproject @@ -0,0 +1,209 @@ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..b3de6c0 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +obj +*.axf +*.hex +*.s +simavr/simavr diff --git a/.project b/.project new file mode 100644 index 0000000..59cd1bd --- /dev/null +++ b/.project @@ -0,0 +1,77 @@ + + + simavr + + + + + + org.eclipse.cdt.managedbuilder.core.genmakebuilder + clean,full,incremental, + + + ?name? + + + + org.eclipse.cdt.make.core.append_environment + true + + + org.eclipse.cdt.make.core.autoBuildTarget + all + + + org.eclipse.cdt.make.core.buildArguments + jap make -C Sources/Utils/simavr + + + org.eclipse.cdt.make.core.buildCommand + ssh + + + org.eclipse.cdt.make.core.cleanBuildTarget + clean + + + org.eclipse.cdt.make.core.contents + org.eclipse.cdt.make.core.activeConfigSettings + + + org.eclipse.cdt.make.core.enableAutoBuild + false + + + org.eclipse.cdt.make.core.enableCleanBuild + true + + + org.eclipse.cdt.make.core.enableFullBuild + true + + + org.eclipse.cdt.make.core.fullBuildTarget + all + + + org.eclipse.cdt.make.core.stopOnError + true + + + org.eclipse.cdt.make.core.useDefaultBuildCmd + false + + + + + org.eclipse.cdt.managedbuilder.core.ScannerConfigBuilder + + + + + + org.eclipse.cdt.core.cnature + org.eclipse.cdt.managedbuilder.core.managedBuildNature + org.eclipse.cdt.managedbuilder.core.ScannerConfigNature + + diff --git a/.simavr.jcc b/.simavr.jcc new file mode 100644 index 0000000..640d586 --- /dev/null +++ b/.simavr.jcc @@ -0,0 +1,140 @@ +jx_browser_data 79 +# project tree +0 "root" +T +1 "main" +T +2 "Makefile" +F +"./simavr/Makefile" +T +2 "avr_spi.c" +F +"./simavr/sim/avr_spi.c" +T +2 "avr_spi.h" +F +"./simavr/sim/avr_spi.h" +T +2 "avr_timer8.c" +F +"./simavr/sim/avr_timer8.c" +T +2 "avr_timer8.h" +F +"./simavr/sim/avr_timer8.h" +T +2 "avr_ioport.c" +F +"./simavr/sim/avr_ioport.c" +T +2 "avr_ioport.h" +F +"./simavr/sim/avr_ioport.h" +T +2 "avr_eeprom.c" +F +"./simavr/sim/avr_eeprom.c" +T +2 "avr_eeprom.h" +F +"./simavr/sim/avr_eeprom.h" +T +2 "avr_uart.c" +F +"./simavr/sim/avr_uart.c" +T +2 "avr_uart.h" +F +"./simavr/sim/avr_uart.h" +T +2 "sim_core.c" +F +"./simavr/sim/sim_core.c" +T +2 "sim_core.h" +F +"./simavr/sim/sim_core.h" +T +2 "sim_gdb.c" +F +"./simavr/sim/sim_gdb.c" +T +2 "sim_gdb.h" +F +"./simavr/sim/sim_gdb.h" +T +2 "sim_elf.c" +F +"./simavr/sim/sim_elf.c" +T +2 "sim_elf.h" +F +"./simavr/sim/sim_elf.h" +T +2 "simavr.c" +F +"./simavr/sim/simavr.c" +T +2 "simavr.h" +F +"./simavr/sim/simavr.h" +F +T +1 "tests" +T +2 "atmega88_example.c" +F +"./tests/atmega88_example.c" +F +T +1 "cores" +T +2 "sim_core_declare.h" +F +"./simavr/cores/sim_core_declare.h" +T +2 "sim_mega88.c" +F +"./simavr/cores/sim_mega88.c" +T +2 "sim_mega168.c" +F +"./simavr/cores/sim_mega168.c" +T +2 "sim_mega48.c" +F +"./simavr/cores/sim_mega48.c" +T +2 "sim_megax8.c" +F +"./simavr/cores/sim_megax8.c" +T +2 "sim_megax8.h" +F +"./simavr/cores/sim_megax8.h" +T +2 "sim_tiny85.c" +F +"./simavr/cores/sim_tiny85.c" +T +2 "sim_mega644.c" +F +"./simavr/cores/sim_mega644.c" +F +F +# tasks +4 +"echo Makefile must be updated manually" +F +# build settings +0 +T +"simavr" +"" +"make -k all" +# search paths +T "./" T +F +# C preprocessor +F diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..94a9ed0 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..cd3b15b --- /dev/null +++ b/Makefile @@ -0,0 +1,12 @@ + + +all: make-tests + make -C simavr + +make-tests: + make -C tests + +clean: + make -C simavr clean + make -C tests clean + \ No newline at end of file diff --git a/README b/README new file mode 100644 index 0000000..7aaa72f --- /dev/null +++ b/README @@ -0,0 +1,35 @@ + +simavr -- a simple, lean and mean AVR simulator + +http://gitorious.org/simavr + +simavr is a new AVR simulator for linux, or any platform that uses avr-gcc. It uses +avr-gcc own register definition to simplify creating new targets for supoortted AVR +devices. + +The core was made to be small and compact, and hackable so allow quick protoyping +of an AVR project. The simulator loads .elf directly, and there is even a way to +specify simulation parameters directly in the emulated code using an .elf section. + +The status of the project is the core works at about 98% (ie, it works, but there +is a known bug). The supported IOs are eeprom, IO ports (including pin interupts), +8 bits timers (well, one of mode of the myriad) and a simple UART that makes +ÒprintfÓ work. + +gdb support is planned next. + +PREQUISTES: ++ avr-gcc ; tested with 4.3.4 (from debian) + The code rudely assumes the avr-gcc is in /usr/lib/avr/include/... ++ libelf-dev + +BUILD: ++ make + +TEST: ++ ./simavr/simavr tests/atmega88_example.axf + +There are no command line options for now.. The simulator recognizes attiny85, +atmega48,88,168 and atmega644. It's fairly easy to add new cores. + +Michel Pollet diff --git a/include/avr_mcu_section.h b/include/avr_mcu_section.h new file mode 100644 index 0000000..b20d501 --- /dev/null +++ b/include/avr_mcu_section.h @@ -0,0 +1,55 @@ +/* + avr_mcu_section.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef __AVR_MCU_SECTION_H__ +#define __AVR_MCU_SECTION_H__ + +/* + * This structure is used to pass "parameters" to the programmer or the simulator, + * it tags the ELF file with a section that contains parameters about the physical + * AVR this was compiled for, including the speed, model, and signature bytes. + * + * A programmer software can read this and verify fuses values for example, and a + * simulator can instanciate the proper "model" of AVR, the speed and so on without + * command line parameters. + * + * Exemple of use: + * + * #include "avr_mcu_section.h" + * AVR_MCU(F_CPU, "atmega88"); + * + */ + +typedef struct avr_mcu_t { + long f_cpu; // avr is little endian + unsigned char id[4]; // signature bytes + unsigned char fuse[4]; // optional + char name[16]; +} avr_mcu_t; + +#define AVR_MCU(_speed, _name) \ +const avr_mcu_t _mmcu __attribute__((section(".mmcu"))) = {\ + .f_cpu = _speed, \ + .id = {SIGNATURE_0, SIGNATURE_1, SIGNATURE_2}, \ + .name = _name,\ +} + +#endif diff --git a/simavr/Makefile b/simavr/Makefile new file mode 100644 index 0000000..b076154 --- /dev/null +++ b/simavr/Makefile @@ -0,0 +1,70 @@ +# +# Copyright 2008, 2009 Michel Pollet +# +# This file is part of simavr. +# +# simavr is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# simavr is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with simavr. If not, see . + +target = simavr + +CFLAGS = -g -std=gnu99 -Wall +CFLAGS += -O3 -mfpmath=sse -msse2 + +cores = ${wildcard cores/*.c} +cores_o = ${patsubst cores/%.c, obj/%.o, ${cores}} +sim = ${wildcard sim/*.c} +sim_o = ${patsubst sim/%.c, obj/%.o, ${sim}} + +VPATH = . +VPATH += cores +VPATH += sim + +IPATH = . +IPATH += sim +IPATH += ../../shared +IPATH += ../include +IPATH += /opt/local/include + +CFLAGS += ${patsubst %,-I%,${subst :, ,${IPATH}}} +LFLAGS = -L/opt/local/lib/ +LDFLAGS += -lelf + +all: obj ${target} + +obj: + @mkdir -p obj + +obj/sim_%.o : cores/sim_%.h cores/sim_core_declare.h sim/*.h +obj/sim_%.o : cores/sim_%.c + @gcc $(CFLAGS) \ + -I/usr/lib/avr/include/ \ + $< -c -o $@ + @echo CORE $< + +obj/%.o: %.h sim/*.h +obj/%.o: %.c + @gcc $(CFLAGS) \ + $< -c -o $@ + @echo CC $< + +${target} : ${cores_o} +${target} : ${sim_o} + @gcc $(CFLAGS) $(LFLAGS) \ + ${^} -o $@ \ + $(LDFLAGS) + @echo LD $@ + +clean: + rm -rf ${target} obj + diff --git a/simavr/cores/sim_core_declare.h b/simavr/cores/sim_core_declare.h new file mode 100644 index 0000000..4394c89 --- /dev/null +++ b/simavr/cores/sim_core_declare.h @@ -0,0 +1,45 @@ +/* + sim_core_declare.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ +#ifndef __SIM_CORE_DECLARE_H__ +#define __SIM_CORE_DECLARE_H__ + +/* + * The macros "fake" the ones in the real avrlib + */ +#define _SFR_IO8(v) ((v)+32) +#define _SFR_MEM8(v) (v) +#define _BV(v) (v) +#define _VECTOR(v) (v) + +/* + * This declares a typical AVR core, using constants what appears + * to be in every io*.h file... + */ +#define DEFAULT_CORE(_vector_size) \ + .ramend = RAMEND, \ + .flashend = FLASHEND, \ + .e2end = E2END, \ + .vector_size = _vector_size, \ + .signature = { SIGNATURE_0,SIGNATURE_1,SIGNATURE_2 }, \ + .fuse = { LFUSE_DEFAULT, HFUSE_DEFAULT, EFUSE_DEFAULT } + + +#endif /* __SIM_CORE_DECLARE_H__ */ diff --git a/simavr/cores/sim_mega168.c b/simavr/cores/sim_mega168.c new file mode 100644 index 0000000..54d8bcf --- /dev/null +++ b/simavr/cores/sim_mega168.c @@ -0,0 +1,43 @@ +/* + sim_mega168.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include "simavr.h" + +#define SIM_VECTOR_SIZE 4 +#define SIM_MMCU "atmega168" +#define SIM_CORENAME mcu_mega168 + +#define _AVR_IO_H_ +#define __ASSEMBLER__ +#include "avr/iom168.h" +// instanciate the new core +#include "sim_megax8.h" + +static avr_t * make() +{ + return &SIM_CORENAME.core; +} + +avr_kind_t mega168 = { + .names = { "atmega168", "atmega168p","atmega168pa" }, + .make = make +}; + diff --git a/simavr/cores/sim_mega48.c b/simavr/cores/sim_mega48.c new file mode 100644 index 0000000..b0b0c95 --- /dev/null +++ b/simavr/cores/sim_mega48.c @@ -0,0 +1,43 @@ +/* + sim_mega48.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include "simavr.h" + +#define SIM_VECTOR_SIZE 2 +#define SIM_MMCU "atmega48" +#define SIM_CORENAME mcu_mega48 + +#define _AVR_IO_H_ +#define __ASSEMBLER__ +#include "avr/iom48.h" +// instanciate the new core +#include "sim_megax8.h" + +static avr_t * make() +{ + return &SIM_CORENAME.core; +} + +avr_kind_t mega48 = { + .names = { "atmega48", "atmega48p","atmega48pa" }, + .make = make +}; + diff --git a/simavr/cores/sim_mega644.c b/simavr/cores/sim_mega644.c new file mode 100644 index 0000000..813e551 --- /dev/null +++ b/simavr/cores/sim_mega644.c @@ -0,0 +1,240 @@ +/* + sim_mega644.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include "simavr.h" +#include "sim_core_declare.h" +#include "avr_eeprom.h" +#include "avr_ioport.h" +#include "avr_uart.h" +#include "avr_timer8.h" + +#define _AVR_IO_H_ +#define __ASSEMBLER__ +#include "avr/iom644.h" + +static void init(struct avr_t * avr); +static void reset(struct avr_t * avr); + + +static struct mcu_t { + avr_t core; + avr_eeprom_t eeprom; + avr_ioport_t porta, portb, portc, portd; + avr_uart_t uart0,uart1; + avr_timer8_t timer0,timer2; +} mcu = { + .core = { + .mmcu = "atmega644", + DEFAULT_CORE(4), + + .init = init, + .reset = reset, + }, + .eeprom = { + .size = E2END+1, + .r_eearh = EEARH, + .r_eearl = EEARL, + .r_eedr = EEDR, + .r_eecr = EECR, + .eepm = { AVR_IO_REGBIT(EECR, EEPM0), AVR_IO_REGBIT(EECR, EEPM1) }, + .eempe = AVR_IO_REGBIT(EECR, EEMPE), + .eepe = AVR_IO_REGBIT(EECR, EEPE), + .eere = AVR_IO_REGBIT(EECR, EERE), + .ready = { + .enable = AVR_IO_REGBIT(EECR, EERIE), + .vector = EE_READY_vect, + }, + }, + .porta = { + .name = 'A', .r_port = PORTA, .r_ddr = DDRA, .r_pin = PINA, + .pcint = { + .enable = AVR_IO_REGBIT(PCICR, PCIE0), + .raised = AVR_IO_REGBIT(PCIFR, PCIF0), + .vector = PCINT0_vect, + }, + .r_pcint = PCMSK0, + }, + .portb = { + .name = 'B', .r_port = PORTB, .r_ddr = DDRB, .r_pin = PINB, + .pcint = { + .enable = AVR_IO_REGBIT(PCICR, PCIE1), + .raised = AVR_IO_REGBIT(PCIFR, PCIF1), + .vector = PCINT1_vect, + }, + .r_pcint = PCMSK1, + }, + .portc = { + .name = 'C', .r_port = PORTC, .r_ddr = DDRC, .r_pin = PINC, + .pcint = { + .enable = AVR_IO_REGBIT(PCICR, PCIE2), + .raised = AVR_IO_REGBIT(PCIFR, PCIF2), + .vector = PCINT2_vect, + }, + .r_pcint = PCMSK2, + }, + .portd = { + .name = 'D', .r_port = PORTD, .r_ddr = DDRD, .r_pin = PIND, + .pcint = { + .enable = AVR_IO_REGBIT(PCICR, PCIE3), + .raised = AVR_IO_REGBIT(PCIFR, PCIF3), + .vector = PCINT3_vect, + }, + .r_pcint = PCMSK3, + }, + + .uart0 = { + .disabled = AVR_IO_REGBIT(PRR,PRUSART0), + .name = '0', + .r_udr = UDR0, + .udre = AVR_IO_REGBIT(UCSR0A, UDRE0), + + .r_ucsra = UCSR0A, + .r_ucsrb = UCSR0B, + .r_ucsrc = UCSR0C, + .r_ubrrl = UBRR0L, + .r_ubrrh = UBRR0H, + .rxc = { + .enable = AVR_IO_REGBIT(UCSR0B, RXCIE0), + .vector = USART0_RX_vect, + }, + .txc = { + .enable = AVR_IO_REGBIT(UCSR0B, TXCIE0), + .vector = USART0_TX_vect, + }, + .udrc = { + .enable = AVR_IO_REGBIT(UCSR0B, UDRIE0), + .vector = USART0_UDRE_vect, + }, + }, + .uart1 = { + .disabled = AVR_IO_REGBIT(PRR,PRUSART1), + .name = '1', + .r_udr = UDR1, + .udre = AVR_IO_REGBIT(UCSR1A, UDRE1), + + .r_ucsra = UCSR1A, + .r_ucsrb = UCSR1B, + .r_ucsrc = UCSR1C, + .r_ubrrl = UBRR1L, + .r_ubrrh = UBRR1H, + .rxc = { + .enable = AVR_IO_REGBIT(UCSR1B, RXCIE1), + .vector = USART1_RX_vect, + }, + .txc = { + .enable = AVR_IO_REGBIT(UCSR1B, TXCIE1), + .vector = USART1_TX_vect, + }, + .udrc = { + .enable = AVR_IO_REGBIT(UCSR1B, UDRIE1), + .vector = USART1_UDRE_vect, + }, + }, + + .timer0 = { + .name = '0', + .wgm = { AVR_IO_REGBIT(TCCR0A, WGM00), AVR_IO_REGBIT(TCCR0A, WGM01), AVR_IO_REGBIT(TCCR0B, WGM02) }, + .cs = { AVR_IO_REGBIT(TCCR0B, CS00), AVR_IO_REGBIT(TCCR0B, CS01), AVR_IO_REGBIT(TCCR0B, CS02) }, + .cs_div = { 0, 0, 3 /* 8 */, 6 /* 64 */, 8 /* 256 */, 10 /* 1024 */ }, + + .r_ocra = OCR0A, + .r_ocrb = OCR0B, + .r_tcnt = TCNT0, + + .overflow = { + .enable = AVR_IO_REGBIT(TIMSK0, TOIE0), + .raised = AVR_IO_REGBIT(TIFR0, TOV0), + .vector = TIMER0_OVF_vect, + }, + .compa = { + .enable = AVR_IO_REGBIT(TIMSK0, OCIE0A), + .raised = AVR_IO_REGBIT(TIFR0, OCF0A), + .vector = TIMER0_COMPA_vect, + }, + .compb = { + .enable = AVR_IO_REGBIT(TIMSK0, OCIE0B), + .raised = AVR_IO_REGBIT(TIFR0, OCF0B), + .vector = TIMER0_COMPB_vect, + }, + }, + .timer2 = { + .name = '2', + .wgm = { AVR_IO_REGBIT(TCCR2A, WGM20), AVR_IO_REGBIT(TCCR2A, WGM21), AVR_IO_REGBIT(TCCR2B, WGM22) }, + .cs = { AVR_IO_REGBIT(TCCR2B, CS20), AVR_IO_REGBIT(TCCR2B, CS21), AVR_IO_REGBIT(TCCR2B, CS22) }, + .cs_div = { 0, 0, 3 /* 8 */, 5 /* 32 */, 6 /* 64 */, 7 /* 128 */, 8 /* 256 */, 10 /* 1024 */ }, + + .r_ocra = OCR2A, + .r_ocrb = OCR2B, + .r_tcnt = TCNT2, + + // asynchronous timer source bit.. if set, use 32khz frequency + .as2 = AVR_IO_REGBIT(ASSR, AS2), + + .overflow = { + .enable = AVR_IO_REGBIT(TIMSK2, TOIE2), + .raised = AVR_IO_REGBIT(TIFR2, TOV2), + .vector = TIMER2_OVF_vect, + }, + .compa = { + .enable = AVR_IO_REGBIT(TIMSK2, OCIE2A), + .raised = AVR_IO_REGBIT(TIFR2, OCF2A), + .vector = TIMER2_COMPA_vect, + }, + .compb = { + .enable = AVR_IO_REGBIT(TIMSK2, OCIE2B), + .raised = AVR_IO_REGBIT(TIFR2, OCF2B), + .vector = TIMER2_COMPB_vect, + }, + }, +}; + +static avr_t * make() +{ + return &mcu.core; +} + +avr_kind_t mega644 = { + .names = { "atmega644", "atmega644p" }, + .make = make +}; + +static void init(struct avr_t * avr) +{ + struct mcu_t * mcu = (struct mcu_t*)avr; + + printf("%s init\n", avr->mmcu); + + avr_eeprom_init(avr, &mcu->eeprom); + avr_ioport_init(avr, &mcu->porta); + avr_ioport_init(avr, &mcu->portb); + avr_ioport_init(avr, &mcu->portc); + avr_ioport_init(avr, &mcu->portd); + avr_uart_init(avr, &mcu->uart0); + avr_uart_init(avr, &mcu->uart1); + avr_timer8_init(avr, &mcu->timer0); + avr_timer8_init(avr, &mcu->timer2); +} + +static void reset(struct avr_t * avr) +{ +// struct mcu_t * mcu = (struct mcu_t*)avr; +} diff --git a/simavr/cores/sim_mega88.c b/simavr/cores/sim_mega88.c new file mode 100644 index 0000000..c5e43cb --- /dev/null +++ b/simavr/cores/sim_mega88.c @@ -0,0 +1,43 @@ +/* + sim_mega88.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include "simavr.h" + +#define SIM_VECTOR_SIZE 2 +#define SIM_MMCU "atmega88" +#define SIM_CORENAME mcu_mega88 + +#define _AVR_IO_H_ +#define __ASSEMBLER__ +#include "avr/iom88.h" +// instanciate the new core +#include "sim_megax8.h" + +static avr_t * make() +{ + return &SIM_CORENAME.core; +} + +avr_kind_t mega88 = { + .names = { "atmega88", "atmega88p","atmega88pa" }, + .make = make +}; + diff --git a/simavr/cores/sim_megax8.c b/simavr/cores/sim_megax8.c new file mode 100644 index 0000000..44bf334 --- /dev/null +++ b/simavr/cores/sim_megax8.c @@ -0,0 +1,45 @@ +/* + sim_megax8.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ +#include +#include "simavr.h" + +#include "sim_megax8.h" + +void mx8_init(struct avr_t * avr) +{ + struct mcu_t * mcu = (struct mcu_t*)avr; + + printf("%s init\n", avr->mmcu); + + avr_eeprom_init(avr, &mcu->eeprom); + avr_ioport_init(avr, &mcu->portb); + avr_ioport_init(avr, &mcu->portc); + avr_ioport_init(avr, &mcu->portd); + avr_uart_init(avr, &mcu->uart); + avr_timer8_init(avr, &mcu->timer0); + avr_timer8_init(avr, &mcu->timer2); + avr_spi_init(avr, &mcu->spi); +} + +void mx8_reset(struct avr_t * avr) +{ +// struct mcu_t * mcu = (struct mcu_t*)avr; +} diff --git a/simavr/cores/sim_megax8.h b/simavr/cores/sim_megax8.h new file mode 100644 index 0000000..cbe6de2 --- /dev/null +++ b/simavr/cores/sim_megax8.h @@ -0,0 +1,209 @@ +/* + sim_megax8.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + + +#ifndef __SIM_MEGAX8_H__ +#define __SIM_MEGAX8_H__ + +#include "sim_core_declare.h" +#include "avr_eeprom.h" +#include "avr_ioport.h" +#include "avr_uart.h" +#include "avr_timer8.h" +#include "avr_spi.h" + +void mx8_init(struct avr_t * avr); +void mx8_reset(struct avr_t * avr); + +/* + * This is a template for all of the x8 devices, hopefuly + */ +struct mcu_t { + avr_t core; + avr_eeprom_t eeprom; + avr_ioport_t portb,portc,portd; + avr_uart_t uart; + avr_timer8_t timer0,timer2; + avr_spi_t spi; +}; + +#ifdef SIM_CORENAME + +#ifndef SIM_VECTOR_SIZE +#error SIM_VECTOR_SIZE is not declared +#endif +#ifndef SIM_MMCU +#error SIM_MMCU is not declared +#endif + +struct mcu_t SIM_CORENAME = { + .core = { + .mmcu = SIM_MMCU, + DEFAULT_CORE(SIM_VECTOR_SIZE), + + .init = mx8_init, + .reset = mx8_reset, + }, + .eeprom = { + .size = E2END+1, + .r_eearh = EEARH, + .r_eearl = EEARL, + .r_eedr = EEDR, + .r_eecr = EECR, + .eepm = { AVR_IO_REGBIT(EECR, EEPM0), AVR_IO_REGBIT(EECR, EEPM1) }, + .eempe = AVR_IO_REGBIT(EECR, EEMPE), + .eepe = AVR_IO_REGBIT(EECR, EEPE), + .eere = AVR_IO_REGBIT(EECR, EERE), + .ready = { + .enable = AVR_IO_REGBIT(EECR, EERIE), + .vector = EE_READY_vect, + }, + }, + .portb = { + .name = 'B', .r_port = PORTB, .r_ddr = DDRB, .r_pin = PINB, + .pcint = { + .enable = AVR_IO_REGBIT(PCICR, PCIE0), + .raised = AVR_IO_REGBIT(PCIFR, PCIF0), + .vector = PCINT0_vect, + }, + .r_pcint = PCMSK0, + }, + .portc = { + .name = 'C', .r_port = PORTC, .r_ddr = DDRC, .r_pin = PINC, + .pcint = { + .enable = AVR_IO_REGBIT(PCICR, PCIE1), + .raised = AVR_IO_REGBIT(PCIFR, PCIF1), + .vector = PCINT1_vect, + }, + .r_pcint = PCMSK1, + }, + .portd = { + .name = 'D', .r_port = PORTD, .r_ddr = DDRD, .r_pin = PIND, + .pcint = { + .enable = AVR_IO_REGBIT(PCICR, PCIE2), + .raised = AVR_IO_REGBIT(PCIFR, PCIF2), + .vector = PCINT2_vect, + }, + .r_pcint = PCMSK2, + }, + + .uart = { + .disabled = AVR_IO_REGBIT(PRR,PRUSART0), + .name = '0', + .r_udr = UDR0, + .udre = AVR_IO_REGBIT(UCSR0A, UDRE0), + + .r_ucsra = UCSR0A, + .r_ucsrb = UCSR0B, + .r_ucsrc = UCSR0C, + .r_ubrrl = UBRR0L, + .r_ubrrh = UBRR0H, + .rxc = { + .enable = AVR_IO_REGBIT(UCSR0B, RXCIE0), + .vector = USART_RX_vect, + }, + .txc = { + .enable = AVR_IO_REGBIT(UCSR0B, TXCIE0), + .vector = USART_TX_vect, + }, + .udrc = { + .enable = AVR_IO_REGBIT(UCSR0B, UDRIE0), + .vector = USART_UDRE_vect, + }, + }, + + .timer0 = { + .name = '0', + .disabled = AVR_IO_REGBIT(PRR,PRTIM0), + .wgm = { AVR_IO_REGBIT(TCCR0A, WGM00), AVR_IO_REGBIT(TCCR0A, WGM01), AVR_IO_REGBIT(TCCR0B, WGM02) }, + .cs = { AVR_IO_REGBIT(TCCR0B, CS00), AVR_IO_REGBIT(TCCR0B, CS01), AVR_IO_REGBIT(TCCR0B, CS02) }, + .cs_div = { 0, 0, 3 /* 8 */, 6 /* 64 */, 8 /* 256 */, 10 /* 1024 */ }, + + .r_ocra = OCR0A, + .r_ocrb = OCR0B, + .r_tcnt = TCNT0, + + .overflow = { + .enable = AVR_IO_REGBIT(TIMSK0, TOIE0), + .raised = AVR_IO_REGBIT(TIFR0, TOV0), + .vector = TIMER0_OVF_vect, + }, + .compa = { + .enable = AVR_IO_REGBIT(TIMSK0, OCIE0A), + .raised = AVR_IO_REGBIT(TIFR0, OCF0A), + .vector = TIMER0_COMPA_vect, + }, + .compb = { + .enable = AVR_IO_REGBIT(TIMSK0, OCIE0B), + .raised = AVR_IO_REGBIT(TIFR0, OCF0B), + .vector = TIMER0_COMPB_vect, + }, + }, + .timer2 = { + .name = '2', + .disabled = AVR_IO_REGBIT(PRR,PRTIM2), + .wgm = { AVR_IO_REGBIT(TCCR2A, WGM20), AVR_IO_REGBIT(TCCR2A, WGM21), AVR_IO_REGBIT(TCCR2B, WGM22) }, + .cs = { AVR_IO_REGBIT(TCCR2B, CS20), AVR_IO_REGBIT(TCCR2B, CS21), AVR_IO_REGBIT(TCCR2B, CS22) }, + .cs_div = { 0, 0, 3 /* 8 */, 5 /* 32 */, 6 /* 64 */, 7 /* 128 */, 8 /* 256 */, 10 /* 1024 */ }, + + .r_ocra = OCR2A, + .r_ocrb = OCR2B, + .r_tcnt = TCNT2, + + // asynchronous timer source bit.. if set, use 32khz frequency + .as2 = AVR_IO_REGBIT(ASSR, AS2), + + .overflow = { + .enable = AVR_IO_REGBIT(TIMSK2, TOIE2), + .raised = AVR_IO_REGBIT(TIFR2, TOV2), + .vector = TIMER2_OVF_vect, + }, + .compa = { + .enable = AVR_IO_REGBIT(TIMSK2, OCIE2A), + .raised = AVR_IO_REGBIT(TIFR2, OCF2A), + .vector = TIMER2_COMPA_vect, + }, + .compb = { + .enable = AVR_IO_REGBIT(TIMSK2, OCIE2B), + .raised = AVR_IO_REGBIT(TIFR2, OCF2B), + .vector = TIMER2_COMPB_vect, + }, + }, + + .spi = { + .disabled = AVR_IO_REGBIT(PRR,PRSPI), + .spe = AVR_IO_REGBIT(SPCR, SPE), + .dord = AVR_IO_REGBIT(SPCR, DORD), + .mstr = AVR_IO_REGBIT(SPCR, MSTR), + .cpol = AVR_IO_REGBIT(SPCR, CPOL), + .cpha = AVR_IO_REGBIT(SPCR, CPHA), + + .spr = { AVR_IO_REGBIT(SPCR, SPR0), AVR_IO_REGBIT(SPCR, SPR1), AVR_IO_REGBIT(SPSR, SPI2X) }, + .spi = { + .enable = AVR_IO_REGBIT(SPCR, SPIE), + .raised = AVR_IO_REGBIT(SPSR, SPIF), + .vector = SPI_STC_vect, + }, + }, +}; +#endif /* SIM_CORENAME */ + +#endif /* __SIM_MEGAX8_H__ */ \ No newline at end of file diff --git a/simavr/cores/sim_tiny85.c b/simavr/cores/sim_tiny85.c new file mode 100644 index 0000000..850005c --- /dev/null +++ b/simavr/cores/sim_tiny85.c @@ -0,0 +1,155 @@ +/* + sim_tiny85.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include "simavr.h" +#include "sim_core_declare.h" +#include "avr_eeprom.h" +#include "avr_ioport.h" +#include "avr_timer8.h" + +#define _AVR_IO_H_ +#define __ASSEMBLER__ +#include "avr/iotn85.h" + +static void init(struct avr_t * avr); +static void reset(struct avr_t * avr); + + +static struct mcu_t { + avr_t core; + avr_eeprom_t eeprom; + avr_ioport_t portb; + avr_timer8_t timer0, timer1; +} mcu = { + .core = { + .mmcu = "attiny85", + DEFAULT_CORE(2), + + .init = init, + .reset = reset, + }, + .eeprom = { + .size = E2END+1, + .r_eearh = EEARH, + .r_eearl = EEARL, + .r_eedr = EEDR, + .r_eecr = EECR, + .eepm = { AVR_IO_REGBIT(EECR, EEPM0), AVR_IO_REGBIT(EECR, EEPM1) }, + .eempe = AVR_IO_REGBIT(EECR, EEMPE), + .eepe = AVR_IO_REGBIT(EECR, EEPE), + .eere = AVR_IO_REGBIT(EECR, EERE), + .ready = { + .enable = AVR_IO_REGBIT(EECR, EERIE), + .vector = EE_RDY_vect,// EE_READY_vect, + }, + }, + .portb = { + .name = 'B', .r_port = PORTB, .r_ddr = DDRB, .r_pin = PINB, + .pcint = { + .enable = AVR_IO_REGBIT(GIMSK, PCIE), + .raised = AVR_IO_REGBIT(GIFR, PCIF), + .vector = PCINT0_vect, + }, + .r_pcint = PCMSK, + }, + .timer0 = { + .name = '0', + .wgm = { AVR_IO_REGBIT(TCCR0A, WGM00), AVR_IO_REGBIT(TCCR0A, WGM01), AVR_IO_REGBIT(TCCR0B, WGM02) }, + .cs = { AVR_IO_REGBIT(TCCR0B, CS00), AVR_IO_REGBIT(TCCR0B, CS01), AVR_IO_REGBIT(TCCR0B, CS02) }, + .cs_div = { 0, 0, 3 /* 8 */, 6 /* 64 */, 8 /* 256 */, 10 /* 1024 */ }, + + .r_ocra = OCR0A, + .r_ocrb = OCR0B, + .r_tcnt = TCNT0, + + .overflow = { + .enable = AVR_IO_REGBIT(TIMSK, TOIE0), + .raised = AVR_IO_REGBIT(TIFR, TOV0), + .vector = TIMER0_OVF_vect, + }, + .compa = { + .enable = AVR_IO_REGBIT(TIMSK, OCIE0A), + .raised = AVR_IO_REGBIT(TIFR, OCF0A), + .vector = TIMER0_COMPA_vect, + }, + .compb = { + .enable = AVR_IO_REGBIT(TIMSK, OCIE0B), + .raised = AVR_IO_REGBIT(TIFR, OCF0B), + .vector = TIMER0_COMPB_vect, + }, + }, + .timer1 = { + .name = '1', + // no wgm bits + .cs = { AVR_IO_REGBIT(TCCR1, CS10), AVR_IO_REGBIT(TCCR1, CS11), AVR_IO_REGBIT(TCCR1, CS12), AVR_IO_REGBIT(TCCR1, CS13) }, + .cs_div = { 0, 0, 1 /* 2 */, 2 /* 4 */, 3 /* 8 */, 4 /* 16 */ }, + + .r_ocra = OCR1A, + .r_ocrb = OCR1B, + .r_ocrc = OCR1C, + .r_tcnt = TCNT1, + + .overflow = { + .enable = AVR_IO_REGBIT(TIMSK, TOIE1), + .raised = AVR_IO_REGBIT(TIFR, TOV1), + .vector = TIMER1_OVF_vect, + }, + .compa = { + .enable = AVR_IO_REGBIT(TIMSK, OCIE1A), + .raised = AVR_IO_REGBIT(TIFR, OCF1A), + .vector = TIMER1_COMPA_vect, + }, + .compb = { + .enable = AVR_IO_REGBIT(TIMSK, OCIE1B), + .raised = AVR_IO_REGBIT(TIFR, OCF1B), + .vector = TIMER1_COMPB_vect, + }, + }, + + +}; + +static avr_t * make() +{ + return &mcu.core; +} + +avr_kind_t tiny85 = { + .make = make +}; + +static void init(struct avr_t * avr) +{ + struct mcu_t * mcu = (struct mcu_t*)avr; + + printf("%s init\n", avr->mmcu); + + avr_eeprom_init(avr, &mcu->eeprom); + avr_ioport_init(avr, &mcu->portb); + avr_timer8_init(avr, &mcu->timer0); + avr_timer8_init(avr, &mcu->timer1); +} + +static void reset(struct avr_t * avr) +{ +// struct mcu_t * mcu = (struct mcu_t*)avr; +} diff --git a/simavr/sim/avr_eeprom.c b/simavr/sim/avr_eeprom.c new file mode 100644 index 0000000..f7a2d60 --- /dev/null +++ b/simavr/sim/avr_eeprom.c @@ -0,0 +1,121 @@ +/* + avr_eeprom.c + + IO module that simulates the AVR EEProm + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include +#include +#include "avr_eeprom.h" + +static void avr_eeprom_run(avr_t * avr, avr_io_t * port) +{ + avr_eeprom_t * p = (avr_eeprom_t *)port; + //printf("%s\n", __FUNCTION__); + if (p->eempe_clear_timer) { + p->eempe_clear_timer--; + if (p->eempe_clear_timer == 0) { + avr_regbit_clear(avr, p->eempe); + } + } + if (p->ready_raise_timer) { + p->ready_raise_timer--; + if (p->ready_raise_timer == 0) { + avr_raise_interupt(avr, &p->ready); + } + } +} + +static void avr_eeprom_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param) +{ + avr_eeprom_t * p = (avr_eeprom_t *)param; + uint8_t eempe = avr_regbit_get(avr, p->eempe); + + avr_core_watch_write(avr, addr, v); + + if (!eempe && avr_regbit_get(avr, p->eempe)) { + p->eempe_clear_timer = 4; // auto clear, later + } + + if (eempe && avr_regbit_get(avr, p->eepe)) { // write operation + uint16_t addr = avr->data[p->r_eearl] | (avr->data[p->r_eearh] << 8); + printf("eeprom write %04x <- %02x\n", addr, avr->data[p->r_eedr]); + p->eeprom[addr] = avr->data[p->r_eedr]; + // automaticaly clears that bit (?) + p->eempe_clear_timer = 0; + avr_regbit_clear(avr, p->eempe); + + p->ready_raise_timer = 1024; // make a avr_milliseconds_to_cycle(...) 3.4ms here + } + if (avr_regbit_get(avr, p->eere)) { // read operation + uint16_t addr = avr->data[p->r_eearl] | (avr->data[p->r_eearh] << 8); + avr->data[p->r_eedr] = p->eeprom[addr]; + printf("eeprom read %04x : %02x\n", addr, p->eeprom[addr]); + } + + // autocleared + avr_regbit_clear(avr, p->eepe); + avr_regbit_clear(avr, p->eere); +} + +static int avr_eeprom_ioctl(avr_t * avr, avr_io_t * port, uint32_t ctl, void * io_param) +{ + avr_eeprom_t * p = (avr_eeprom_t *)port; + int res = -1; + + switch(ctl) { + case AVR_IOCTL_EEPROM_SET: { + avr_eeprom_desc_t * desc = (avr_eeprom_desc_t*)io_param; + if (!desc || !desc->size || !desc->ee || (desc->offset + desc->size) >= p->size) { + printf("%s: AVR_IOCTL_EEPROM_SET Invalid argument\n", + __FUNCTION__); + return -2; + } + memcpy(p->eeprom + desc->offset, desc->ee, desc->size); + printf("%s: AVR_IOCTL_EEPROM_SET Loaded %d at offset %d\n", + __FUNCTION__, desc->size, desc->offset); + } break; + } + + return res; +} + +static avr_io_t _io = { + .kind = "eeprom", + .run = avr_eeprom_run, + .ioctl = avr_eeprom_ioctl, +}; + +void avr_eeprom_init(avr_t * avr, avr_eeprom_t * p) +{ + p->io = _io; + printf("%s init (%d bytes) EEL/H:%02x/%02x EED=%02x EEC=%02x\n", + __FUNCTION__, p->size, p->r_eearl, p->r_eearh, p->r_eedr, p->r_eecr); + + p->eeprom = malloc(p->size); + memset(p->eeprom, 0xff, p->size); + + avr_register_io(avr, &p->io); + avr_register_vector(avr, &p->ready); + + avr_register_io_write(avr, p->r_eecr, avr_eeprom_write, p); +} + diff --git a/simavr/sim/avr_eeprom.h b/simavr/sim/avr_eeprom.h new file mode 100644 index 0000000..37585bf --- /dev/null +++ b/simavr/sim/avr_eeprom.h @@ -0,0 +1,61 @@ +/* + avr_eeprom.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef __AVR_EEPROM_H__ +#define __AVR_EEPROM_H__ + +#include "simavr.h" + +typedef struct avr_eeprom_t { + avr_io_t io; + + uint8_t * eeprom; // actual bytes + uint16_t size; // size for this MCU + + uint8_t r_eearh; + uint8_t r_eearl; + uint8_t r_eedr; + + // eepm -- eeprom write mode + uint8_t r_eecr; // shortcut, assumes these bits fit in that register + avr_regbit_t eepm[4]; + avr_regbit_t eempe; // eeprom master program enable + avr_regbit_t eepe; // eeprom program enable + avr_regbit_t eere; // eeprom read enable + + avr_int_vector_t ready; // EERIE vector + + uint32_t eempe_clear_timer; + uint32_t ready_raise_timer; +} avr_eeprom_t; + +void avr_eeprom_init(avr_t * avr, avr_eeprom_t * port); + +typedef struct avr_eeprom_desc_t { + uint8_t * ee; + uint16_t offset; + uint32_t size; +} avr_eeprom_desc_t; + +#define AVR_IOCTL_EEPROM_GET AVR_IOCTL_DEF('e','e','g','p') +#define AVR_IOCTL_EEPROM_SET AVR_IOCTL_DEF('e','e','s','p') + +#endif /* __AVR_EEPROM_H__ */ diff --git a/simavr/sim/avr_ioport.c b/simavr/sim/avr_ioport.c new file mode 100644 index 0000000..157a624 --- /dev/null +++ b/simavr/sim/avr_ioport.c @@ -0,0 +1,102 @@ +/* + avr_ioport.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include "avr_ioport.h" + +static void avr_ioport_run(avr_t * avr, avr_io_t * port) +{ + //printf("%s\n", __FUNCTION__); +} + +static uint8_t avr_ioport_read(struct avr_t * avr, uint8_t addr, void * param) +{ + avr_ioport_t * p = (avr_ioport_t *)param; + uint8_t v = avr->data[addr]; + + if (addr == p->r_pin) { + uint8_t v = avr->data[p->r_port]; + avr->data[addr] = v; + // made to trigger potential watchpoints + v = avr_core_watch_read(avr, addr); +// printf("** PIN%c(%02x) = %02x\n", p->name, addr, v); + } + return v; +} + +static void avr_ioport_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param) +{ + avr_ioport_t * p = (avr_ioport_t *)param; + uint8_t oldv = avr->data[addr]; + + if (addr == p->r_port) { + // printf("PORT%c(%02x) = %02x (was %02x)\n", p->name, addr, v, oldv); + + avr_core_watch_write(avr, addr, v); + if (v != oldv) { + int raise = 1; + int mask = v ^ oldv; + if (p->r_pcint) + raise = avr->data[p->r_pcint] & mask; + if (raise) + avr_raise_interupt(avr, &p->pcint); + } + + + if (p->name == 'D') { + static int cs = -1; + if ((oldv & 0xf0) != (v & 0xf0)) { + for (int i = 0; i < 4; i++) { + + } + } + { + } + } + } +} + +static void avr_ioport_reset(avr_t * avr, avr_io_t * port) +{ +} + +static avr_io_t _io = { + .kind = "io", + .run = avr_ioport_run, + .reset = avr_ioport_reset, +}; + +void avr_ioport_init(avr_t * avr, avr_ioport_t * port) +{ + port->io = _io; + printf("%s PIN%c 0x%02x DDR%c 0x%02x PORT%c 0x%02x\n", + __FUNCTION__, + port->name, port->r_pin, + port->name, port->r_ddr, + port->name, port->r_port); + + avr_register_io(avr, &port->io); + avr_register_vector(avr, &port->pcint); + + avr_register_io_write(avr, port->r_port, avr_ioport_write, port); + avr_register_io_read(avr, port->r_pin, avr_ioport_read, port); +} + diff --git a/simavr/sim/avr_ioport.h b/simavr/sim/avr_ioport.h new file mode 100644 index 0000000..9f38995 --- /dev/null +++ b/simavr/sim/avr_ioport.h @@ -0,0 +1,41 @@ +/* + avr_ioport.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef __AVR_IOPORT_H__ +#define __AVR_IOPORT_H__ + +#include "simavr.h" + +typedef struct avr_ioport_t { + avr_io_t io; + char name; + uint8_t r_port; + uint8_t r_ddr; + uint8_t r_pin; + + avr_int_vector_t pcint; // PCINT vector + uint8_t r_pcint; // pcint 8 pins mask + +} avr_ioport_t; + +void avr_ioport_init(avr_t * avr, avr_ioport_t * port); + +#endif /* __AVR_IOPORT_H__ */ diff --git a/simavr/sim/avr_spi.c b/simavr/sim/avr_spi.c new file mode 100644 index 0000000..b373e8e --- /dev/null +++ b/simavr/sim/avr_spi.c @@ -0,0 +1,82 @@ +/* + avr_spi.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include "avr_spi.h" + +static void avr_spi_run(avr_t * avr, avr_io_t * port) +{ +// printf("%s\n", __FUNCTION__); +} + +#if 0 +static uint8_t avr_spi_read(struct avr_t * avr, uint8_t addr, void * param) +{ + avr_spi_t * p = (avr_spi_t *)param; + uint8_t v = avr->data[addr]; +// printf("** PIN%c = %02x\n", p->name, v); + return v; +} + +static void avr_spi_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param) +{ + avr_spi_t * p = (avr_spi_t *)param; + + if (addr == p->r_udr) { + // printf("UDR%c(%02x) = %02x\n", p->name, addr, v); + avr_core_watch_write(avr, addr, v); + avr_regbit_set(avr, p->udre); + + static char buf[128]; + static int l = 0; + buf[l++] = v <= ' ' ? '.' : v; + buf[l] = 0; + if (v == '\n' || l == 127) { + l = 0; + printf("\e[32m%s\e[0m\n", buf); + } + } +} +#endif + +void avr_spi_reset(avr_t * avr, struct avr_io_t *io) +{ +// avr_spi_t * p = (avr_spi_t *)io; +// avr_regbit_set(avr, p->udre); +} + +static avr_io_t _io = { + .kind = "spi", + .run = avr_spi_run, + .reset = avr_spi_reset, +}; + +void avr_spi_init(avr_t * avr, avr_spi_t * p) +{ + p->io = _io; + avr_register_io(avr, &p->io); + + printf("%s SPI%c init\n", __FUNCTION__, p->name); + +// avr_register_io_write(avr, p->r_udr, avr_spi_write, p); +// avr_register_io_read(avr, p->r_udr, avr_spi_read, p); +} + diff --git a/simavr/sim/avr_spi.h b/simavr/sim/avr_spi.h new file mode 100644 index 0000000..0cae169 --- /dev/null +++ b/simavr/sim/avr_spi.h @@ -0,0 +1,47 @@ +/* + avr_spi.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef AVR_SPI_H_ +#define AVR_SPI_H_ + +#include "simavr.h" + +typedef struct avr_spi_t { + avr_io_t io; + char name; + avr_regbit_t disabled; // bit in the PRR + + uint8_t r_spdr; // data register + uint8_t r_spcr; // control register + + avr_regbit_t spe; // spi enable + avr_regbit_t dord; // data order + avr_regbit_t mstr; // master/slave + avr_regbit_t cpol; // clock polarity + avr_regbit_t cpha; // phase + avr_regbit_t spr[4]; // clock divider + + avr_int_vector_t spi; // spi interupt +} avr_spi_t; + +void avr_spi_init(avr_t * avr, avr_spi_t * port); + +#endif /* AVR_SPI_H_ */ diff --git a/simavr/sim/avr_timer8.c b/simavr/sim/avr_timer8.c new file mode 100644 index 0000000..93bcb9c --- /dev/null +++ b/simavr/sim/avr_timer8.c @@ -0,0 +1,118 @@ +/* + avr_timer8.c + + Handles the just one mode of the 8 bit AVR timer. + Still need to handle all the others! + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include "avr_timer8.h" + +static void avr_timer8_run(avr_t * avr, avr_io_t * port) +{ + avr_timer8_t * p = (avr_timer8_t *)port; + //printf("%s\n", __FUNCTION__); + + if (p->compa_cycles) { + if (p->compa_next == 0) { + p->compa_next = avr->cycle + p->compa_cycles; + } + if (avr->cycle >= p->compa_next) { + // printf("timer a firea %d\n", p->compa_next); + fflush(stdout); + p->compa_next += p->compa_cycles; + avr_raise_interupt(avr, &p->compa); + } + } +} + +#if 0 +static uint8_t avr_timer8_read(struct avr_t * avr, uint8_t addr, void * param) +{ + avr_timer8_t * p = (avr_timer8_t *)param; + uint8_t v = avr->data[addr]; + + if (addr == p->r_pin) { + uint8_t v = avr->data[p->r_port]; + avr->data[addr] = v; + // made to trigger potential watchpoints + v = avr_core_watch_read(avr, addr); + printf("** PIN%c(%02x) = %02x\n", p->name, addr, v); + } + return v; +} +#endif + +static void avr_timer8_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param) +{ + avr_timer8_t * p = (avr_timer8_t *)param; +// uint8_t oldv = avr->data[addr]; + + p->compa_cycles = 0; + p->compa_next = 0; + + avr_core_watch_write(avr, addr, v); + long clock = avr->frequency; + if (avr_regbit_get(avr, p->as2)) + clock = 32768; + uint8_t cs = avr_regbit_get_array(avr, p->cs, ARRAY_SIZE(p->cs)); + if (cs == 0) { + printf("%s-%c clock turned off\n", __FUNCTION__, p->name); + } + uint8_t mode = avr_regbit_get_array(avr, p->wgm, ARRAY_SIZE(p->wgm)); + uint8_t cs_div = p->cs_div[cs]; + uint16_t ocra = avr->data[p->r_ocra]; + uint16_t ocrb = avr->data[p->r_ocrb]; + long f = clock >> cs_div; + long fa = f / 2 / (ocra+1), fb = f / 2 / (ocrb+1); + + printf("%s-%c clock f=%ld cs=%02x (div %d) = %ldhz\n", __FUNCTION__, p->name, clock, cs, 1 << cs_div, f); + printf("%s-%c wgm %d OCRA=%3d = %ldhz\n", __FUNCTION__, p->name, mode, ocra, fa); + printf("%s-%c wgm %d OCRB=%3d = %ldhz\n", __FUNCTION__, p->name, mode, ocrb, fb); + + long cocra = ocra ? avr->frequency / fa : 0; + p->compa_cycles = cocra; + printf("%s-%c A %ld/%ld = cycles = %ld\n", __FUNCTION__, p->name, (long)avr->frequency, fa, cocra); + +} + +static void avr_timer8_reset(avr_t * avr, avr_io_t * port) +{ +} + +static avr_io_t _io = { + .kind = "timer8", + .run = avr_timer8_run, + .reset = avr_timer8_reset, +}; + +void avr_timer8_init(avr_t * avr, avr_timer8_t * p) +{ + p->io = _io; + printf("%s timer%c created\n", __FUNCTION__, p->name); + + avr_register_io(avr, &p->io); +// avr_register_vector(avr, &port->pcint); + + avr_register_io_write(avr, p->cs[0].reg, avr_timer8_write, p); + avr_register_io_write(avr, p->r_ocra, avr_timer8_write, p); + avr_register_io_write(avr, p->r_ocrb, avr_timer8_write, p); + //avr_register_io_read(avr, port->r_pin, avr_ioport_read, port); +} diff --git a/simavr/sim/avr_timer8.h b/simavr/sim/avr_timer8.h new file mode 100644 index 0000000..b73a831 --- /dev/null +++ b/simavr/sim/avr_timer8.h @@ -0,0 +1,49 @@ +/* + avr_timer8.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef AVR_TIMER8_H_ +#define AVR_TIMER8_H_ + +#include "simavr.h" + +typedef struct avr_timer8_t { + avr_io_t io; + char name; + avr_regbit_t disabled; // bit in the PRR + + uint8_t r_ocra, r_ocrb, r_ocrc, r_tcnt; + + avr_regbit_t wgm[4]; + avr_regbit_t cs[4]; + uint8_t cs_div[16]; + avr_regbit_t as2; // asynchronous clock 32khz + + avr_int_vector_t compa; // comparator A + avr_int_vector_t compb; // comparator A + avr_int_vector_t overflow; // overflow + + + uint64_t compa_cycles, compa_next; +} avr_timer8_t; + +void avr_timer8_init(avr_t * avr, avr_timer8_t * port); + +#endif /* AVR_TIMER8_H_ */ diff --git a/simavr/sim/avr_uart.c b/simavr/sim/avr_uart.c new file mode 100644 index 0000000..06aca7a --- /dev/null +++ b/simavr/sim/avr_uart.c @@ -0,0 +1,85 @@ +/* + avr_uart.c + + Handles UART access + Right now just handle "write" to the serial port at any speed + and printf to the console when '\n' is written. + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include "avr_uart.h" + +static void avr_uart_run(avr_t * avr, avr_io_t * port) +{ +// printf("%s\n", __FUNCTION__); +} + +static uint8_t avr_uart_read(struct avr_t * avr, uint8_t addr, void * param) +{ +// avr_uart_t * p = (avr_uart_t *)param; + uint8_t v = avr->data[addr]; +// printf("** PIN%c = %02x\n", p->name, v); + return v; +} + +static void avr_uart_write(struct avr_t * avr, uint8_t addr, uint8_t v, void * param) +{ + avr_uart_t * p = (avr_uart_t *)param; + + if (addr == p->r_udr) { + // printf("UDR%c(%02x) = %02x\n", p->name, addr, v); + avr_core_watch_write(avr, addr, v); + avr_regbit_set(avr, p->udre); + + static char buf[128]; + static int l = 0; + buf[l++] = v < ' ' ? '.' : v; + buf[l] = 0; + if (v == '\n' || l == 127) { + l = 0; + printf("\e[32m%s\e[0m\n", buf); + } + } +} + +void avr_uart_reset(avr_t * avr, struct avr_io_t *io) +{ + avr_uart_t * p = (avr_uart_t *)io; + avr_regbit_set(avr, p->udre); +} + +static avr_io_t _io = { + .kind = "uart", + .run = avr_uart_run, + .reset = avr_uart_reset, +}; + +void avr_uart_init(avr_t * avr, avr_uart_t * p) +{ + p->io = _io; + avr_register_io(avr, &p->io); + + printf("%s UART%c UDR=%02x\n", __FUNCTION__, p->name, p->r_udr); + + avr_register_io_write(avr, p->r_udr, avr_uart_write, p); + avr_register_io_read(avr, p->r_udr, avr_uart_read, p); + +} + diff --git a/simavr/sim/avr_uart.h b/simavr/sim/avr_uart.h new file mode 100644 index 0000000..7ac6092 --- /dev/null +++ b/simavr/sim/avr_uart.h @@ -0,0 +1,49 @@ +/* + avr_uart.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef AVR_UART_H_ +#define AVR_UART_H_ + +#include "simavr.h" + +typedef struct avr_uart_t { + avr_io_t io; + char name; + avr_regbit_t disabled; // bit in the PRR + + uint8_t r_udr; + uint8_t r_ucsra; + uint8_t r_ucsrb; + uint8_t r_ucsrc; + + uint8_t r_ubrrl,r_ubrrh; + + avr_int_vector_t rxc; + avr_int_vector_t txc; + avr_int_vector_t udrc; + + avr_regbit_t udre; // AVR_IO_REGBIT(UCSR0A, UDRE0), + +} avr_uart_t; + +void avr_uart_init(avr_t * avr, avr_uart_t * port); + +#endif /* AVR_UART_H_ */ diff --git a/simavr/sim/sim_core.c b/simavr/sim/sim_core.c new file mode 100644 index 0000000..53271e1 --- /dev/null +++ b/simavr/sim/sim_core.c @@ -0,0 +1,1129 @@ +/* + sim_core.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include +#include +#include +#include "simavr.h" +#include "sim_core.h" + +// SREG bit names +const char * _sreg_bit_name = "cznvshti"; + +/* + * Handle "touching" registers, marking them changed. + * This is used only for debugging purposes to be able to + * print the effects of each instructions on registers + */ +#define REG_TOUCH(a, r) (a)->touched[(r) >> 5] |= (1 << ((r) & 0x1f)) +#define REG_ISTOUCHED(a, r) ((a)->touched[(r) >> 5] & (1 << ((r) & 0x1f))) + +/* + * This allows a "special case" to skip indtruction tracing when in these + * symbols. since printf() is useful to have, but generates a lot of cycles + */ +int dont_trace(const char * name) +{ + return ( + !strcmp(name, "uart_putchar") || + !strcmp(name, "fputc") || + !strcmp(name, "printf") || + !strcmp(name, "vfprintf") || + !strcmp(name, "__ultoa_invert") || + !strcmp(name, "__prologue_saves__") || + !strcmp(name, "__epilogue_restores__")); +} + +int donttrace = 0; + +#define STATE(_f, args...) { \ + if (avr->trace) {\ + if (avr->codeline[avr->pc>>1]) {\ + const char * symn = avr->codeline[avr->pc>>1]->symbol; \ + int dont = 0 && dont_trace(symn);\ + if (dont!=donttrace) { \ + donttrace = dont;\ + DUMP_REG();\ + }\ + if (donttrace==0)\ + printf("%04x: %-25s " _f, avr->pc, symn, ## args);\ + } else \ + printf("%s: %04x: " _f, __FUNCTION__, avr->pc, ## args);\ + }\ + } +#define SREG() if (avr->trace && donttrace == 0) {\ + printf("%04x: \t\t\t\t\t\t\t\t\tSREG = ", avr->pc); \ + for (int _sbi = 0; _sbi < 8; _sbi++)\ + printf("%c", avr->sreg[_sbi] ? toupper(_sreg_bit_name[_sbi]) : '.');\ + printf("\n");\ +} + +/* + * Set a register (r < 256) + * if it's an IO regisrer (> 31) also (try to) call any callback that was + * registered to track changes to that register. + */ +static inline void _avr_set_r(avr_t * avr, uint8_t r, uint8_t v) +{ + REG_TOUCH(avr, r); + + if (r == R_SREG) { + avr->data[r] = v; + // unsplit the SREG + for (int i = 0; i < 8; i++) + avr->sreg[i] = (avr->data[R_SREG] & (1 << i)) != 0; + SREG(); + } + if (r > 31) { + uint8_t io = AVR_DATA_TO_IO(r); + if (avr->iow[io].w) + avr->iow[io].w(avr, r, v, avr->iow[io].param); + else + avr->data[r] = v; + } else + avr->data[r] = v; +} + +/* + * Stack pointer access + */ +inline uint16_t _avr_sp_get(avr_t * avr) +{ + return avr->data[R_SPL] | (avr->data[R_SPH] << 8); +} + +inline void _avr_sp_set(avr_t * avr, uint16_t sp) +{ + _avr_set_r(avr, R_SPL, sp); + _avr_set_r(avr, R_SPH, sp >> 8); +} + +/* + * Set any address to a value; split between registers and SRAM + */ +static inline void _avr_set_ram(avr_t * avr, uint16_t addr, uint8_t v) +{ + if (addr < 256) + _avr_set_r(avr, addr, v); + else + avr_core_watch_write(avr, addr, v); +} + +/* + * Get a value from SRAM. + */ +static inline uint8_t _avr_get_ram(avr_t * avr, uint16_t addr) +{ + if (addr > 31 && addr < 256) { + uint8_t io = AVR_DATA_TO_IO(addr); + if (avr->ior[io].r) + avr->data[addr] = avr->ior[io].r(avr, addr, avr->ior[io].param); + } + return avr_core_watch_read(avr, addr); +} + +/* + * Stack oush accessors. Push/pop 8 and 16 bits + */ +static inline void _avr_push8(avr_t * avr, uint16_t v) +{ + uint16_t sp = _avr_sp_get(avr); + _avr_set_ram(avr, sp, v); + _avr_sp_set(avr, sp-1); +} + +static inline uint8_t _avr_pop8(avr_t * avr) +{ + uint16_t sp = _avr_sp_get(avr) + 1; + uint8_t res = _avr_get_ram(avr, sp); + _avr_sp_set(avr, sp); + return res; +} + +inline void _avr_push16(avr_t * avr, uint16_t v) +{ + _avr_push8(avr, v >> 8); + _avr_push8(avr, v); +} + +static inline uint16_t _avr_pop16(avr_t * avr) +{ + uint16_t res = _avr_pop8(avr); + res |= _avr_pop8(avr) << 8; + return res; +} + +/* + * "Pretty" register names + */ +const char * reg_names[255] = { + [R_XH] = "XH", [R_XL] = "XL", + [R_YH] = "YH", [R_YL] = "YL", + [R_ZH] = "ZH", [R_ZL] = "ZL", + [R_SPH] = "SPH", [R_SPL] = "SPL", + [R_SREG] = "SREG", +}; + + +const char * avr_regname(uint8_t reg) +{ + if (!reg_names[reg]) { + char tt[16]; + if (reg < 32) + sprintf(tt, "r%d", reg); + else + sprintf(tt, "io:%02x", reg); + reg_names[reg] = strdup(tt); + } + return reg_names[reg]; +} + +/* + * Called when an invalid opcode is decoded + */ +static void _avr_invalid_opcode(avr_t * avr) +{ + printf("\e[31m*** %04x: %-25s Invalid Opcode SP=%04x O=%04x \e[0m\n", + avr->pc, avr->codeline[avr->pc>>1]->symbol, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc+1]<<8)); +} + +/* + * Dump changed registers when tracing + */ +void avr_dump_state(avr_t * avr) +{ + if (!avr->trace || donttrace) + return; + + int doit = 0; + + for (int r = 0; r < 3 && !doit; r++) + if (avr->touched[r]) + doit = 1; + if (!doit) + return; + printf(" ->> "); + const int r16[] = { R_SPL, R_XL, R_YL, R_ZL }; + for (int i = 0; i < 4; i++) + if (REG_ISTOUCHED(avr, r16[i]) || REG_ISTOUCHED(avr, r16[i]+1)) { + REG_TOUCH(avr, r16[i]); + REG_TOUCH(avr, r16[i]+1); + } + + for (int i = 0; i < 3*32; i++) + if (REG_ISTOUCHED(avr, i)) { + printf("%s=%02x ", avr_regname(i), avr->data[i]); + } + printf("\n"); +} + +#define get_r_d_10(o) \ + const uint8_t r = ((o >> 5) & 0x10) | (o & 0xf); \ + const uint8_t d = (o >> 4) & 0x1f;\ + const uint8_t vd = avr->data[d], vr =avr->data[r]; +#define get_k_r16(o) \ + const uint8_t r = 16 + ((o >> 4) & 0xf); \ + const uint8_t k = ((o & 0x0f00) >> 4) | (o & 0xf); + +/* + * Add a "jump" address to the jump trace buffer + */ +#define TRACE_JUMP()\ + avr->old[avr->old_pci].pc = avr->pc;\ + avr->old[avr->old_pci].sp = _avr_sp_get(avr);\ + avr->old_pci = (avr->old_pci + 1) & (OLD_PC_SIZE-1);\ + +/****************************************************************************\ + * + * Helper functions for calculating the status register bit values. + * See the Atmel data sheet for the instuction set for more info. + * +\****************************************************************************/ + +static uint8_t +get_add_carry (uint8_t res, uint8_t rd, uint8_t rr, int b) +{ + uint8_t resb = res >> b & 0x1; + uint8_t rdb = rd >> b & 0x1; + uint8_t rrb = rr >> b & 0x1; + return (rdb & rrb) | (rrb & ~resb) | (~resb & rdb); +} + +static uint8_t +get_add_overflow (uint8_t res, uint8_t rd, uint8_t rr) +{ + uint8_t res7 = res >> 7 & 0x1; + uint8_t rd7 = rd >> 7 & 0x1; + uint8_t rr7 = rr >> 7 & 0x1; + return (rd7 & rr7 & ~res7) | (~rd7 & ~rr7 & res7); +} + +static uint8_t +get_sub_carry (uint8_t res, uint8_t rd, uint8_t rr, int b) +{ + uint8_t resb = res >> b & 0x1; + uint8_t rdb = rd >> b & 0x1; + uint8_t rrb = rr >> b & 0x1; + return (~rdb & rrb) | (rrb & resb) | (resb & ~rdb); +} + +static uint8_t +get_sub_overflow (uint8_t res, uint8_t rd, uint8_t rr) +{ + uint8_t res7 = res >> 7 & 0x1; + uint8_t rd7 = rd >> 7 & 0x1; + uint8_t rr7 = rr >> 7 & 0x1; + return (rd7 & ~rr7 & ~res7) | (~rd7 & rr7 & res7); +} + +static uint8_t +get_compare_carry (uint8_t res, uint8_t rd, uint8_t rr, int b) +{ + uint8_t resb = (res >> b) & 0x1; + uint8_t rdb = (rd >> b) & 0x1; + uint8_t rrb = (rr >> b) & 0x1; + return (~rdb & rrb) | (rrb & resb) | (resb & ~rdb); +} + +static uint8_t +get_compare_overflow (uint8_t res, uint8_t rd, uint8_t rr) +{ + res >>= 7; rd >>= 7; rr >>= 7; + /* The atmel data sheet says the second term is ~rd7 for CP + * but that doesn't make any sense. You be the judge. */ + return (rd & ~rr & ~res) | (~rd & rr & res); +} + +/* + * Main opcode decoder + * + * The decoder was written by following the datasheet in no particular order. + * As I went along, I noticed "bit patterns" that could be used to factor opcodes + * However, a lot of these only becane apparent later on, so SOME instructions + * (skip of bit set etc) are compact, and some could use some refactoring (the ALU + * ones scream to be factored). + * I assume that the decoder could easily be 2/3 of it's current size. + * + * The core 'almost' work. There is a case where it munches the stack, problem to be + * debugged. + * + * It lacks a couple of multiply instructions, and the "extended" XMega jumps. + * + * for now all instructions take "one" cycle, the cycle+= needs to be added. + */ +uint16_t avr_run_one(avr_t * avr) +{ + /* + * this traces spurious reset or bad jump/opcodes and dumps the last 32 "jumps" to track it down + */ + if ((avr->pc == 0 && avr->cycle > 0) || avr->pc >= avr->codeend) { + avr->trace = 1; + STATE("RESET\n"); + CRASH(); + } + + uint32_t opcode = (avr->flash[avr->pc + 1] << 8) | avr->flash[avr->pc]; + uint32_t new_pc = avr->pc + 2; // future "default" pc + int cycle = 1; + + avr->touched[0] = avr->touched[1] = avr->touched[2] = 0; + + switch (opcode & 0xf000) { + case 0x0000: { + switch (opcode) { + case 0x0000: { // NOP + STATE("nop\n"); + } break; + default: { + switch (opcode & 0xfc00) { + case 0x0400: { // CPC compare with carry 0000 01rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd - vr - avr->sreg[S_C]; + STATE("cpc %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + if (res) + avr->sreg[S_Z] = 0; + avr->sreg[S_H] = get_compare_carry(res, vd, vr, 3); + avr->sreg[S_V] = get_compare_overflow(res, vd, vr); + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = get_compare_carry(res, vd, vr, 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x0c00: { // ADD without carry 0000 11 rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd + vr; + if (r == d) { + STATE("lsl %s[%02x] = %02x\n", avr_regname(d), vd, res & 0xff); + } else { + STATE("add %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + } + _avr_set_r(avr, d, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_H] = get_add_carry(res, vd, vr, 3); + avr->sreg[S_V] = get_add_overflow(res, vd, vr); + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = get_add_carry(res, vd, vr, 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x0800: { // SBC substract with carry 0000 10rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd - vr - avr->sreg[S_C]; + STATE("sbc %s[%02x], %s[%02x] = %02x\n", avr_regname(d), avr->data[d], avr_regname(r), avr->data[r], res); + _avr_set_r(avr, d, res); + if (res) + avr->sreg[S_Z] = 0; + avr->sreg[S_H] = get_sub_carry(res, vd, vr, 3); + avr->sreg[S_V] = get_sub_overflow(res, vd, vr); + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = get_sub_carry(res, vd, vr, 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + default: + switch (opcode & 0xff00) { + case 0x0100: { // MOVW – Copy Register Word 0000 0001 dddd rrrr + uint8_t d = ((opcode >> 4) & 0xf) << 1; + uint8_t r = ((opcode) & 0xf) << 1; + STATE("movw %s:%s, %s:%s[%02x%02x]\n", avr_regname(d), avr_regname(d+1), avr_regname(r), avr_regname(r+1), avr->data[r+1], avr->data[r]); + _avr_set_r(avr, d, avr->data[r]); + _avr_set_r(avr, d+1, avr->data[r+1]); + } break; + default: _avr_invalid_opcode(avr); + } + } + } + } + } break; + + case 0x1000: { + switch (opcode & 0xfc00) { + case 0x1800: { // SUB without carry 0000 10 rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd - vr; + STATE("sub %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + _avr_set_r(avr, d, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_H] = get_sub_carry(res, vd, vr, 3); + avr->sreg[S_V] = get_sub_overflow(res, vd, vr); + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = get_sub_carry(res, vd, vr, 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x1000: { // CPSE Compare, skip if equal 0000 10 rd dddd rrrr + get_r_d_10(opcode); + uint16_t res = vd == vr; + STATE("cpse %s[%02x], %s[%02x]\t; Will%s skip\n", avr_regname(d), avr->data[d], avr_regname(r), avr->data[r], res ? "":"not "); + if (res) + new_pc += 2; + } break; + case 0x1400: { // CP Compare 0000 10 rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd - vr; + STATE("cp %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_H] = get_compare_carry(res, vd, vr, 3); + avr->sreg[S_V] = get_compare_overflow(res, vd, vr); + avr->sreg[S_N] = res >> 7; + avr->sreg[S_C] = get_compare_carry(res, vd, vr, 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x1c00: { // ADD with carry 0001 11 rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd + vr + avr->sreg[S_C]; + if (r == d) { + STATE("rol %s[%02x] = %02x\n", avr_regname(d), avr->data[d], res); + } else { + STATE("addc %s[%02x], %s[%02x] = %02x\n", avr_regname(d), avr->data[d], avr_regname(r), avr->data[r], res); + } + _avr_set_r(avr, d, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_H] = get_add_carry(res, vd, vr, 3); + avr->sreg[S_V] = get_add_overflow(res, vd, vr); + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = get_add_carry(res, vd, vr, 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + default: + switch (opcode & 0xff00) { + case 0x0200: { // MULS – Multiply Signed 0000 0010 dddd rrrr + int8_t r = opcode & 0xf; + int8_t d = (opcode >> 4) & 0xf; + int16_t res = ((int8_t)avr->data[r]) * ((int8_t)avr->data[d]); + STATE("muls %s[%d], %s[%02x] = %d\n", avr_regname(d), ((int8_t)avr->data[d]), avr_regname(r), ((int8_t)avr->data[r]), res); + _avr_set_r(avr, 0, res); + _avr_set_r(avr, 1, res >> 8); + avr->sreg[S_C] = (res >> 15) & 1; + avr->sreg[S_Z] = res == 0; + SREG(); + } break; + default: _avr_invalid_opcode(avr); + } + } + } break; + + case 0x2000: { + switch (opcode & 0xfc00) { + case 0x2000: { // AND 0010 00rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd & vr; + if (r == d) { + STATE("tst %s[%02x]\n", avr_regname(d), avr->data[d]); + } else { + STATE("and %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + } + _avr_set_r(avr, d, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_V] = 0; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x2400: { // EOR 0010 01rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd ^ vr; + if (r==d) { + STATE("clr %s[%02x]\n", avr_regname(d), avr->data[d]); + } else { + STATE("eor %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + } + _avr_set_r(avr, d, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_V] = 0; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x2800: { // OR Logical OR 0010 10rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vd | vr; + STATE("or %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + _avr_set_r(avr, d, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_V] = 0; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x2c00: { // MOV 0010 11rd dddd rrrr + get_r_d_10(opcode); + uint8_t res = vr; + STATE("mov %s[%02x], %s[%02x] = %02x\n", avr_regname(d), vd, avr_regname(r), vr, res); + _avr_set_r(avr, d, res); + } break; + default: _avr_invalid_opcode(avr); + } + } break; + + case 0x3000: { // CPI 0011 KKKK rrrr KKKK + get_k_r16(opcode); + uint8_t vr = avr->data[r]; + uint8_t res = vr - k; + STATE("cpi %s[%02x], 0x%02x\n", avr_regname(r), vr, k); + + avr->sreg[S_Z] = res == 0; + avr->sreg[S_H] = get_compare_carry(res, vr, k, 3); + avr->sreg[S_V] = get_compare_overflow(res, vr, k); + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = get_compare_carry(res, vr, k, 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + + case 0x4000: { // SBCI Subtract Immediate With Carry 0101 10 kkkk dddd kkkk + get_k_r16(opcode); + uint8_t vr = avr->data[r]; + uint8_t res = vr - k - avr->sreg[S_C]; + STATE("sbci %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], k, res); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = (k + avr->sreg[S_C]) > vr; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + + case 0x5000: { // SUB Subtract Immediate 0101 10 kkkk dddd kkkk + get_k_r16(opcode); + uint8_t vr = avr->data[r]; + uint8_t res = vr - k; + STATE("subi %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], k, res); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_C] = k > vr; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + + case 0x6000: { // ORI aka SBR Logical AND with Immediate 0110 kkkk dddd kkkk + get_k_r16(opcode); + uint8_t res = avr->data[r] | k; + STATE("ori %s[%02x], 0x%02x\n", avr_regname(r), avr->data[r], k); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_V] = 0; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + + case 0x7000: { // ANDI Logical AND with Immediate 0111 kkkk dddd kkkk + get_k_r16(opcode); + uint8_t res = avr->data[r] & k; + STATE("andi %s[%02x], 0x%02x\n", avr_regname(r), avr->data[r], k); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = (res >> 7) & 1; + avr->sreg[S_V] = 0; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + + case 0xa000: + case 0x8000: { + switch (opcode & 0xd008) { + case 0xa000: + case 0x8000: { // LD (LDD) – Load Indirect using Z 10q0 qq0r rrrr 0qqq + uint16_t v = avr->data[R_ZL] | (avr->data[R_ZH] << 8); + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t q = ((opcode & 0x2000) >> 7) | ((opcode & 0x0c00) >> 7) | (opcode & 0x7); + + if (opcode & 0x0200) { + STATE("st (Z+%d[%04x]), %s[%02x]\n", q, v+q, avr_regname(r), avr->data[r]); + _avr_set_ram(avr, v+q, avr->data[r]); + } else { + STATE("ld %s, (Z+%d[%04x])=[%02x]\n", avr_regname(r), q, v+q, avr->data[v+q]); + _avr_set_r(avr, r, _avr_get_ram(avr, v+q)); + } + } break; + case 0xa008: + case 0x8008: { // LD (LDD) – Load Indirect using Y 10q0 qq0r rrrr 1qqq + uint16_t v = avr->data[R_YL] | (avr->data[R_YH] << 8); + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t q = ((opcode & 0x2000) >> 7) | ((opcode & 0x0c00) >> 7) | (opcode & 0x7); + + if (opcode & 0x0200) { + STATE("st (Y+%d[%04x]), %s[%02x]\n", q, v+q, avr_regname(r), avr->data[r]); + _avr_set_ram(avr, v+q, avr->data[r]); + } else { + STATE("ld %s, (Y+%d[%04x])=[%02x]\n", avr_regname(r), q, v+q, avr->data[v+q]); + _avr_set_r(avr, r, _avr_get_ram(avr, v+q)); + } + } break; + default: _avr_invalid_opcode(avr); + } + } break; + + case 0x9000: { + /* this is an annoying special case, but at least these lines handle all the SREG set/clear opcodes */ + if ((opcode & 0xff0f) == 0x9408) { + uint8_t b = (opcode >> 4) & 7; + STATE("%s%c\n", opcode & 0x0080 ? "cl" : "se", _sreg_bit_name[b]); + avr->sreg[b] = (opcode & 0x0080) == 0; + SREG(); + } else switch (opcode) { + case 0x9588: { // SLEEP + STATE("sleep\n"); + avr->state = cpu_Sleeping; + } break; + case 0x9598: { // BREAK + STATE("break\n"); + } break; + case 0x95a8: { // WDR + STATE("wdr\n"); + } break; + case 0x9409: { // IJMP Indirect jump + uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8); + STATE("ijmp Z[%04x]\n", z << 1); + new_pc = z << 1; + TRACE_JUMP(); + } break; + case 0x9509: { // ICALL Indirect Call to Subroutine + uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8); + STATE("icall Z[%04x]\n", z << 1); + + _avr_push16(avr, new_pc >> 1); + new_pc = z << 1; + TRACE_JUMP(); + } break; + case 0x9518: // RETI + case 0x9508: { // RET + new_pc = _avr_pop16(avr) << 1; + if (opcode & 0x10) // reti + avr->sreg[S_I] = 1; + STATE("ret%s\n", opcode & 0x10 ? "i" : ""); + TRACE_JUMP(); + } break; + case 0x95c8: { // LPM Load Program Memory R0 <- (Z) + uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8); + STATE("lpm %s, (Z[%04x])\n", avr_regname(0), z); + _avr_set_r(avr, 0, avr->flash[z]); + } break; + case 0x9408:case 0x9418:case 0x9428:case 0x9438:case 0x9448:case 0x9458:case 0x9468: + case 0x9478: + { // BSET 1001 0100 0ddd 1000 + uint8_t b = (opcode >> 4) & 7; + avr->sreg[b] = 1; + STATE("bset %c\n", _sreg_bit_name[b]); + SREG(); + } break; + case 0x9488:case 0x9498:case 0x94a8:case 0x94b8:case 0x94c8:case 0x94d8:case 0x94e8: + case 0x94f8: + { // BSET 1001 0100 0ddd 1000 + uint8_t b = (opcode >> 4) & 7; + avr->sreg[b] = 0; + STATE("bclr %c\n", _sreg_bit_name[b]); + SREG(); + } break; + default: { + switch (opcode & 0xfe0f) { + case 0x9005: + case 0x9004: { // LPM Load Program Memory 1001 000d dddd 01oo + uint16_t z = avr->data[R_ZL] | (avr->data[R_ZH] << 8); + uint8_t r = (opcode >> 4) & 0x1f; + int op = opcode & 3; + STATE("lpm %s, (Z[%04x]%s)\n", avr_regname(r), z, opcode?"+":""); + _avr_set_r(avr, r, avr->flash[z]); + if (op == 1) { + z++; + _avr_set_r(avr, R_ZH, z >> 8); + _avr_set_r(avr, R_ZL, z); + } + } break; + case 0x900c: + case 0x900d: + case 0x900e: { // LD Load Indirect from Data using X 1001 000r rrrr 11oo + int op = opcode & 3; + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t x = (avr->data[R_XH] << 8) | avr->data[R_XL]; + STATE("ld %s, %sX[%04x]%s\n", avr_regname(r), op == 2 ? "--" : "", x, op == 1 ? "++" : ""); + + if (op == 2) x--; + _avr_set_r(avr, r, _avr_get_ram(avr, x)); + if (op == 1) x++; + _avr_set_r(avr, R_XH, x >> 8); + _avr_set_r(avr, R_XL, x); + } break; + case 0x920c: + case 0x920d: + case 0x920e: { // ST Store Indirect Data Space X 1001 001r rrrr 11oo + int op = opcode & 3; + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t x = (avr->data[R_XH] << 8) | avr->data[R_XL]; + STATE("st %sX[%04x]%s, %s[%02x] \n", op == 2 ? "--" : "", x, op == 1 ? "++" : "", avr_regname(r), avr->data[r]); + + if (op == 2) x--; + _avr_set_ram(avr, x, avr->data[r]); + if (op == 1) x++; + _avr_set_r(avr, R_XH, x >> 8); + _avr_set_r(avr, R_XL, x); + } break; + case 0x9009: + case 0x900a: { // LD Load Indirect from Data using Y 1001 000r rrrr 10oo + int op = opcode & 3; + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t y = (avr->data[R_YH] << 8) | avr->data[R_YL]; + STATE("ld %s, %sY[%04x]%s\n", avr_regname(r), op == 2 ? "--" : "", y, op == 1 ? "++" : ""); + + if (op == 2) y--; + _avr_set_r(avr, r, _avr_get_ram(avr, y)); + if (op == 1) y++; + _avr_set_r(avr, R_YH, y >> 8); + _avr_set_r(avr, R_YL, y); + } break; + case 0x9209: + case 0x920a: { // ST Store Indirect Data Space Y 1001 001r rrrr 10oo + int op = opcode & 3; + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t y = (avr->data[R_YH] << 8) | avr->data[R_YL]; + STATE("st %sY[%04x]%s, %s[%02x] \n", op == 2 ? "--" : "", y, op == 1 ? "++" : "", avr_regname(r), avr->data[r]); + + if (op == 2) y--; + _avr_set_ram(avr, y, avr->data[r]); + if (op == 1) y++; + _avr_set_r(avr, R_YH, y >> 8); + _avr_set_r(avr, R_YL, y); + } break; + case 0x9200: { // STS ! Store Direct to Data Space, 32 bits + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc]; + new_pc += 2; + STATE("sts 0x%04x, %s[%02x]\n", x, avr_regname(r), avr->data[r]); + _avr_set_ram(avr, x, avr->data[r]); + } break; + case 0x9001: + case 0x9002: { // LD Load Indirect from Data using Z 1001 001r rrrr 00oo + int op = opcode & 3; + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t z = (avr->data[R_ZH] << 8) | avr->data[R_ZL]; + STATE("ld %s, %sZ[%04x]%s\n", avr_regname(r), op == 2 ? "--" : "", z, op == 1 ? "++" : ""); + + if (op == 2) z--; + _avr_set_r(avr, r, _avr_get_ram(avr, z)); + if (op == 1) z++; + _avr_set_r(avr, R_ZH, z >> 8); + _avr_set_r(avr, R_ZL, z); + } break; + case 0x9201: + case 0x9202: { // ST Store Indirect Data Space Z 1001 001r rrrr 00oo + int op = opcode & 3; + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t z = (avr->data[R_ZH] << 8) | avr->data[R_ZL]; + STATE("st %sZ[%04x]%s, %s[%02x] \n", op == 2 ? "--" : "", z, op == 1 ? "++" : "", avr_regname(r), avr->data[r]); + + if (op == 2) z--; + _avr_set_ram(avr, z, avr->data[r]); + if (op == 1) z++; + _avr_set_r(avr, R_ZH, z >> 8); + _avr_set_r(avr, R_ZL, z); + } break; + case 0x900f: { // POP 1001 000d dddd 1111 + uint8_t r = (opcode >> 4) & 0x1f; + _avr_set_r(avr, r, _avr_pop8(avr)); + uint16_t sp = _avr_sp_get(avr); + STATE("pop %s (@%04x)[%02x]\n", avr_regname(r), sp, avr->data[sp]); + } break; + case 0x920f: { // PUSH 1001 001d dddd 1111 + uint8_t r = (opcode >> 4) & 0x1f; + _avr_push8(avr, avr->data[r]); + uint16_t sp = _avr_sp_get(avr); + STATE("push %s[%02x] (@%04x)\n", avr_regname(r), avr->data[r], sp); + } break; + case 0x9000: { // LDS Load Direct from Data Space, 32 bits + uint8_t r = (opcode >> 4) & 0x1f; + uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc]; + new_pc += 2; + STATE("lds %s[%02x], 0x%04x\n", avr_regname(r), avr->data[r], x); + _avr_set_r(avr, r, _avr_get_ram(avr, x)); + } break; + case 0x9400: { // COM – One’s Complement + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t res = 0xff - avr->data[r]; + STATE("com %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = res >> 7; + avr->sreg[S_V] = 0; + avr->sreg[S_C] = 1; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x9401: { // NEG – One’s Complement + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t rd = avr->data[r]; + uint8_t res = 0x00 - rd; + STATE("neg %s[%02x] = %02x\n", avr_regname(r), rd, res); + _avr_set_r(avr, r, res); + avr->sreg[S_H] = ((res >> 3) | (rd >> 3)) & 1; + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = res >> 7; + avr->sreg[S_V] = res == 0x80; + avr->sreg[S_C] = res != 0; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x9402: { // SWAP – Swap Nibbles + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t res = (avr->data[r] >> 4) | (avr->data[r] << 4) ; + STATE("swap %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res); + _avr_set_r(avr, r, res); + } break; + case 0x9403: { // INC – Increment + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t res = avr->data[r] + 1; + STATE("inc %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = res >> 7; + avr->sreg[S_V] = res == 0x7f; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x9405: { // ASR – Arithmetic Shift Right 1001 010d dddd 0101 + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t vr = avr->data[r]; + uint8_t res = (vr >> 1) | (vr & 0x80); + STATE("asr %s[%02x]\n", avr_regname(r), vr); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_C] = vr & 1; + avr->sreg[S_N] = res >> 7; + avr->sreg[S_V] = avr->sreg[S_N] ^ avr->sreg[S_C]; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x9406: { // LSR 1001 010d dddd 0110 + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t vr = avr->data[r]; + uint8_t res = vr >> 1; + STATE("lsr %s[%02x]\n", avr_regname(r), vr); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_C] = vr & 1; + avr->sreg[S_N] = 0; + avr->sreg[S_V] = avr->sreg[S_N] ^ avr->sreg[S_C]; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x9407: { // ROR 1001 010d dddd 0111 + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t vr = avr->data[r]; + uint8_t res = (avr->sreg[S_C] ? 0x80 : 0) | vr >> 1; + STATE("ror %s[%02x]\n", avr_regname(r), vr); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_C] = vr & 1; + avr->sreg[S_N] = 0; + avr->sreg[S_V] = avr->sreg[S_N] ^ avr->sreg[S_C]; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x940a: { // DEC – Decrement + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t res = avr->data[r] - 1; + STATE("dec %s[%02x] = %02x\n", avr_regname(r), avr->data[r], res); + _avr_set_r(avr, r, res); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_N] = res >> 7; + avr->sreg[S_V] = res == 0x80; + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + } break; + case 0x940c: + case 0x940d: { // JMP Long Call to sub, 32 bits + uint32_t a = ((opcode & 0x01f0) >> 3) | (opcode & 1); + uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc]; + a = (a << 16) | x; + // printf("jmp %06x\n", a << 1); + STATE("jmp 0x%06x\n", a); + new_pc = a << 1; + TRACE_JUMP(); + } break; + case 0x940e: + case 0x940f: { // CALL Long Call to sub, 32 bits + uint32_t a = ((opcode & 0x01f0) >> 3) | (opcode & 1); + uint16_t x = (avr->flash[new_pc+1] << 8) | avr->flash[new_pc]; + a = (a << 16) | x; + // printf("call %06x\n", a << 1); + STATE("call 0x%06x\n", a); + new_pc += 2; + _avr_push16(avr, new_pc >> 1); + new_pc = a << 1; + TRACE_JUMP(); + } break; + + default: { + switch (opcode & 0xff00) { + case 0x9600: { // ADIW - Add Immediate to Word 1001 0110 KKdd KKKK + uint8_t r = 24 + ((opcode >> 3) & 0x6); + uint8_t k = ((opcode & 0x00c0) >> 2) | (opcode & 0xf); + uint8_t rdl = avr->data[r], rdh = avr->data[r+1]; + uint32_t res = rdl | (rdh << 8); + STATE("adiw %s:%s[%04x], 0x%02x\n", avr_regname(r), avr_regname(r+1), res, k); + res += k; + _avr_set_r(avr, r + 1, res >> 8); + _avr_set_r(avr, r, res); + avr->sreg[S_V] = ~(rdh >> 7) & ((res >> 15) & 1); + avr->sreg[S_Z] = (res & 0xffff) == 0; + avr->sreg[S_N] = (res >> 15) & 1; + avr->sreg[S_C] = ~((res >> 15) & 1) & (rdh >> 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + cycle++; + } break; + case 0x9700: { // SBIW - Subtract Immediate from Word 1001 0110 KKdd KKKK + uint8_t r = 24 + ((opcode >> 3) & 0x6); + uint8_t k = ((opcode & 0x00c0) >> 2) | (opcode & 0xf); + uint8_t rdl = avr->data[r], rdh = avr->data[r+1]; + uint32_t res = rdl | (rdh << 8); + STATE("sbiw %s:%s[%04x], 0x%02x\n", avr_regname(r), avr_regname(r+1), res, k); + res -= k; + _avr_set_r(avr, r + 1, res >> 8); + _avr_set_r(avr, r, res); + avr->sreg[S_V] = (rdh >> 7) & (~(res >> 15) & 1); + avr->sreg[S_Z] = (res & 0xffff) == 0; + avr->sreg[S_N] = (res >> 15) & 1; + avr->sreg[S_C] = ((res >> 15) & 1) & (~rdh >> 7); + avr->sreg[S_S] = avr->sreg[S_N] ^ avr->sreg[S_V]; + SREG(); + cycle++; + } break; + case 0x9800: { // CBI - Clear Bit in I/O Registe 1001 1000 AAAA Abbb + uint8_t io = ((opcode >> 3) & 0x1f) + 32; + uint8_t b = opcode & 0x7; + uint8_t res = _avr_get_ram(avr, io) & ~(1 << b); + STATE("cbi %s[%04x], 0x%02x = %02x\n", avr_regname(io), avr->data[io], 1<> 3) & 0x1f) + 32; + uint8_t b = opcode & 0x7; + uint8_t res = _avr_get_ram(avr, io) & (1 << b); + STATE("sbic %s[%04x], 0x%02x\t; Will%s branch\n", avr_regname(io), avr->data[io], 1<> 3) & 0x1f) + 32; + uint8_t b = opcode & 0x7; + uint8_t res = _avr_get_ram(avr, io) | (1 << b); + STATE("sbi %s[%04x], 0x%02x = %02x\n", avr_regname(io), avr->data[io], 1<> 3) & 0x1f; + uint8_t b = opcode & 0x7; + uint8_t res = _avr_get_ram(avr, io + 32) & (1 << b); + STATE("sbis %s[%04x], 0x%02x\t; Will%s branch\n", avr_regname(io), avr->data[io], 1<> 8); + avr->sreg[S_Z] = res == 0; + avr->sreg[S_C] = (res >> 15) & 1; + SREG(); + } break; + default: _avr_invalid_opcode(avr); + } + } + } break; + } + } break; + } + } break; + + case 0xb000: { + switch (opcode & 0xf800) { + case 0xb800: { // OUT A,Rr 1011 1AAr rrrr AAAA + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t A = ((((opcode >> 9) & 3) << 4) | ((opcode) & 0xf)) + 32; + STATE("out %s, %s[%02x]\n", avr_regname(A), avr_regname(r), avr->data[r]); + // todo: store to IO register + _avr_set_ram(avr, A, avr->data[r]); + // avr->data[A] = ; + } break; + case 0xb000: { // IN Rd,A 1011 0AAr rrrr AAAA + uint8_t r = (opcode >> 4) & 0x1f; + uint8_t A = ((((opcode >> 9) & 3) << 4) | ((opcode) & 0xf)) + 32; + STATE("in %s, %s[%02x]\n", avr_regname(r), avr_regname(A), avr->data[A]); + // todo: get the IO register + _avr_set_r(avr, r, _avr_get_ram(avr, A)); + } break; + default: _avr_invalid_opcode(avr); + } + } break; + + case 0xc000: { + // RJMP 1100 kkkk kkkk kkkk + short o = ((short)(opcode << 4)) >> 4; + STATE("rjmp .%d [%04x]\n", o, new_pc + (o << 1)); + new_pc = new_pc + (o << 1); + TRACE_JUMP(); + } break; + + case 0xd000: { + // RCALL 1100 kkkk kkkk kkkk + short o = ((short)(opcode << 4)) >> 4; + STATE("rcall .%d [%04x]\n", o, new_pc + (o << 1)); + _avr_push16(avr, new_pc >> 1); + new_pc = new_pc + (o << 1); + TRACE_JUMP(); + } break; + + case 0xe000: { // LDI Rd, K 1110 KKKK RRRR KKKK -- aka SER (LDI r, 0xff) + uint8_t d = 16 + ((opcode >> 4) & 0xf); + uint8_t k = ((opcode & 0x0f00) >> 4) | (opcode & 0xf); + STATE("ldi %s, 0x%02x\n", avr_regname(d), k); + _avr_set_r(avr, d, k); + } break; + + case 0xf000: { + switch (opcode & 0xfe00) { + case 0xf000: + case 0xf200: + case 0xf400: + case 0xf600: { // All the SREG branches + short o = ((short)(opcode << 6)) >> 9; // offset + uint8_t s = opcode & 7; + int set = (opcode & 0x0400) == 0; // this bit means BRXC otherwise BRXS + int branch = (avr->sreg[s] && set) || (!avr->sreg[s] && !set); + const char *names[2][8] = { + { "brcc", "brne", "brpl", "brvc", NULL, "brhc", "brtc", "brid"}, + { "brcs", "breq", "brmi", "brvs", NULL, "brhs", "brts", "brie"}, + }; + if (names[set][s]) { + STATE("%s .%d [%04x]\t; Will%s branch\n", names[set][s], o, new_pc + (o << 1), branch ? "":" not"); + } else { + STATE("%s%c .%d [%04x]\t; Will%s branch\n", set ? "brbs" : "brbc", _sreg_bit_name[s], o, new_pc + (o << 1), branch ? "":" not"); + } + if (branch) + new_pc = new_pc + (o << 1); + } break; + case 0xf800: + case 0xf900: { // BLD – Bit Store from T into a Bit in Register 1111 100r rrrr 0bbb + uint8_t r = (opcode >> 4) & 0x1f; // register index + uint8_t s = opcode & 7; + uint8_t v = avr->data[r] | (avr->sreg[S_T] ? (1 << s) : 0); + STATE("bld %s[%02x], 0x%02x = %02x\n", avr_regname(r), avr->data[r], 1 << s, v); + _avr_set_r(avr, r, v); + } break; + case 0xfa00: + case 0xfb00:{ // BST – Bit Store into T from bit in Register 1111 100r rrrr 0bbb + uint8_t r = (opcode >> 4) & 0x1f; // register index + uint8_t s = opcode & 7; + STATE("bst %s[%02x], 0x%02x\n", avr_regname(r), avr->data[r], 1 << s); + avr->sreg[S_T] = (avr->data[r] >> s) & 1; + SREG(); + } break; + case 0xfc00: + case 0xfe00: { // SBRS/SBRC – Skip if Bit in Register is Set/Clear 1111 11sr rrrr 0bbb + uint8_t r = (opcode >> 4) & 0x1f; // register index + uint8_t s = opcode & 7; + int set = (opcode & 0x0200) != 0; + int branch = ((avr->data[r] & (1 << s)) && set) || (!(avr->data[r] & (1 << s)) && !set); + STATE("%s %s[%02x], 0x%02x\t; Will%s branch\n", set ? "sbrs" : "sbrc", avr_regname(r), avr->data[r], 1 << s, branch ? "":" not"); + if (branch) + new_pc = new_pc + 2; + } break; + default: _avr_invalid_opcode(avr); + } + } break; + + default: _avr_invalid_opcode(avr); + + } + avr->cycle += cycle; + return new_pc; +} + + diff --git a/simavr/sim/sim_core.h b/simavr/sim/sim_core.h new file mode 100644 index 0000000..0fc5dd5 --- /dev/null +++ b/simavr/sim/sim_core.h @@ -0,0 +1,70 @@ +/* + sim_core.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef SIM_CORE_H_ +#define SIM_CORE_H_ + +/* + * Instruction decoder, run ONE instruction + */ +uint16_t avr_run_one(avr_t * avr); + +/* + * These are for internal access to the stack (for interupts) + */ +uint16_t _avr_sp_get(avr_t * avr); +void _avr_sp_set(avr_t * avr, uint16_t sp); +void _avr_push16(avr_t * avr, uint16_t v); + +/* + * Get a "pretty" register name + */ +const char * avr_regname(uint8_t reg); + + +/* + * DEBUG bits follow + * These will diseapear when gdb arrives + */ +void avr_dump_state(avr_t * avr); + +#define DUMP_REG() { \ + for (int i = 0; i < 32; i++) printf("%s=%02x%c", avr_regname(i), avr->data[i],i==15?'\n':' ');\ + printf("\n");\ + uint16_t y = avr->data[R_YL] | (avr->data[R_YH]<<8);\ + for (int i = 0; i < 20; i++) printf("Y+%02d=%02x ", i, avr->data[y+i]);\ + printf("\n");\ + } + + +#define CRASH() {\ + DUMP_REG();\ + printf("*** CYCLE %lld\n", avr->cycle);\ + for (int i = OLD_PC_SIZE-1; i > 0; i--) {\ + int pci = (avr->old_pci + i) & 0xf;\ + printf("\e[31m*** %04x: %-25s RESET -%d; sp %04x\e[0m\n",\ + avr->old[pci].pc, avr->codeline[avr->old[pci].pc>>1]->symbol, OLD_PC_SIZE-i, avr->old[pci].sp);\ + }\ + printf("Stack Ptr %04x/%04x = %d \n", _avr_sp_get(avr), avr->ramend, avr->ramend - _avr_sp_get(avr));\ + exit(1);\ + } + +#endif /* SIM_CORE_H_ */ diff --git a/simavr/sim/sim_elf.c b/simavr/sim/sim_elf.c new file mode 100644 index 0000000..29552a9 --- /dev/null +++ b/simavr/sim/sim_elf.c @@ -0,0 +1,174 @@ +/* + sim_elf.c + + Loads a .elf file, extract the code, the data, the eeprom and + the "mcu" specification section, also load usable code symbols + to be able to print meaningful trace information. + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "sim_elf.h" + +int elf_read_firmware(const char * file, elf_firmware_t * firmware) +{ + Elf32_Ehdr elf_header; /* ELF header */ + Elf *elf = NULL; /* Our Elf pointer for libelf */ + int fd; // File Descriptor + + if ((fd = open(file, O_RDONLY)) == -1 || + (read(fd, &elf_header, sizeof(elf_header))) < sizeof(elf_header)) { + printf("could not read %s\n", file); + perror(file); + close(fd); + return -1; + } + + Elf_Data *data_data = NULL, + *data_text = NULL, + *data_ee = NULL; /* Data Descriptor */ + + memset(firmware, 0, sizeof(*firmware)); +#if ELF_SYMBOLS + //int bitesize = ((avr->flashend+1) >> 1) * sizeof(avr_symbol_t); + firmware->codesize = 32768; + int bitesize = firmware->codesize * sizeof(avr_symbol_t); + firmware->codeline = malloc(bitesize); + memset(firmware->codeline,0, bitesize); +#endif + + /* this is actualy mandatory !! otherwise elf_begin() fails */ + if (elf_version(EV_CURRENT) == EV_NONE) { + /* library out of date - recover from error */ + } + // Iterate through section headers again this time well stop when we find symbols + elf = elf_begin(fd, ELF_C_READ, NULL); + //printf("Loading elf %s : %p\n", file, elf); + + Elf_Scn *scn = NULL; /* Section Descriptor */ + + while ((scn = elf_nextscn(elf, scn)) != NULL) { + GElf_Shdr shdr; /* Section Header */ + gelf_getshdr(scn, &shdr); + char * name = elf_strptr(elf, elf_header.e_shstrndx, shdr.sh_name); + // printf("Walking elf section '%s'\n", name); + + if (!strcmp(name, ".text")) + data_text = elf_getdata(scn, NULL); + else if (!strcmp(name, ".data")) + data_data = elf_getdata(scn, NULL); + else if (!strcmp(name, ".eeprom")) + data_ee = elf_getdata(scn, NULL); + else if (!strcmp(name, ".bss")) { + Elf_Data *s = elf_getdata(scn, NULL); + firmware->bsssize = s->d_size; + } else if (!strcmp(name, ".mmcu")) { + Elf_Data *s = elf_getdata(scn, NULL); + long f_cpu = s ? *((long*)s->d_buf) : 0; + firmware->mmcu = *((avr_mcu_t*)s->d_buf); + printf("%s: setting speed to %ld\n", __FUNCTION__, f_cpu); + // avr->frequency = f_cpu; + } +#if ELF_SYMBOLS + // When we find a section header marked SHT_SYMTAB stop and get symbols + if (shdr.sh_type == SHT_SYMTAB) { + // edata points to our symbol table + Elf_Data *edata = elf_getdata(scn, NULL); + + // how many symbols are there? this number comes from the size of + // the section divided by the entry size + int symbol_count = shdr.sh_size / shdr.sh_entsize; + + // loop through to grab all symbols + for (int i = 0; i < symbol_count; i++) { + GElf_Sym sym; /* Symbol */ + // libelf grabs the symbol data using gelf_getsym() + gelf_getsym(edata, i, &sym); + + // print out the value and size + // printf("%08x %08d ", sym.st_value, sym.st_size); + if (ELF32_ST_BIND(sym.st_info) == STB_GLOBAL || + ELF32_ST_TYPE(sym.st_info) == STT_FUNC || + ELF32_ST_TYPE(sym.st_info) == STT_OBJECT) { + const char * name = elf_strptr(elf, shdr.sh_link, sym.st_name); + + // type of symbol + if (sym.st_value & 0xfff00000) { + + } else { + // code + if (firmware->codeline[sym.st_value >> 1] == NULL) { + avr_symbol_t * s = firmware->codeline[sym.st_value >> 1] = malloc(sizeof(avr_symbol_t*)); + s->symbol = strdup(name); + s->addr = sym.st_value; + } + } + } + } + } +#endif + } +#if ELF_SYMBOLS + avr_symbol_t * last = NULL; + for (int i = 0; i < firmware->codesize; i++) { + if (!firmware->codeline[i]) + firmware->codeline[i] = last; + else + last = firmware->codeline[i]; + } +#endif + uint32_t offset = 0; + firmware->flashsize = + (data_text ? data_text->d_size : 0) + + (data_data ? data_data->d_size : 0); + firmware->flash = malloc(firmware->flashsize); + if (data_text) { + // hdump("code", data_text->d_buf, data_text->d_size); + memcpy(firmware->flash + offset, data_text->d_buf, data_text->d_size); + offset += data_text->d_size; + printf("Loaded %d .text\n", data_text->d_size); + } + if (data_data) { + // hdump("data", data_data->d_buf, data_data->d_size); + memcpy(firmware->flash + offset, data_data->d_buf, data_data->d_size); + printf("Loaded %d .data\n", data_data->d_size); + offset += data_data->d_size; + firmware->datasize = data_data->d_size; + } + if (data_ee) { + // hdump("eeprom", data_ee->d_buf, data_ee->d_size); + firmware->eeprom = malloc(data_ee->d_size); + memcpy(firmware->eeprom, data_ee->d_buf, data_ee->d_size); + printf("Loaded %d .eeprom\n", data_ee->d_size); + firmware->eesize = data_ee->d_size; + } +// hdump("flash", avr->flash, offset); + elf_end(elf); + close(fd); + return 0; +} + diff --git a/simavr/sim/sim_elf.h b/simavr/sim/sim_elf.h new file mode 100644 index 0000000..05af0a7 --- /dev/null +++ b/simavr/sim/sim_elf.h @@ -0,0 +1,53 @@ +/* + sim_elf.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef ELF_H_ +#define ELF_H_ + +#include "avr_mcu_section.h" + +#ifndef ELF_SYMBOLS +#define ELF_SYMBOLS 1 +#endif + +#if ELF_SYMBOLS +#include "simavr.h" +#endif + +typedef struct elf_firmware_t { + avr_mcu_t mmcu; + uint8_t * flash; + uint32_t flashsize; + uint32_t datasize; + uint32_t bsssize; + // read the .eeprom section of the elf, too + uint8_t * eeprom; + uint32_t eesize; + +#if ELF_SYMBOLS + avr_symbol_t ** codeline; + uint32_t codesize; // in elements +#endif +} elf_firmware_t ; + +int elf_read_firmware(const char * file, elf_firmware_t * firmware); + +#endif /* ELF_H_ */ diff --git a/simavr/sim/sim_gdb.c b/simavr/sim/sim_gdb.c new file mode 100644 index 0000000..74714d1 --- /dev/null +++ b/simavr/sim/sim_gdb.c @@ -0,0 +1,66 @@ +/* + sim_gdb.c + + Placeholder! + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "simavr.h" + +typedef struct avr_gdb_t { + avr_t * avr; + int sock; +} avr_gdb_t; + +int avr_gdb_init(avr_t * avr) +{ + avr_gdb_t * g = malloc(sizeof(avr_gdb_t)); + memset(g, 0, sizeof(avr_gdb_t)); + + avr->gdb = NULL; + + if ((g->sock = socket(PF_INET, SOCK_STREAM, 0)) < 0) { + fprintf(stderr, "Can't create socket: %s", strerror(errno)); + return -1; + } + + int i = 1; + setsockopt(g->sock, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i)); + + struct sockaddr_in address = { 0 }; + address.sin_family = AF_INET; + address.sin_port = htons (1234); + + if (bind(g->sock, (struct sockaddr *) &address, sizeof(address))) { + fprintf(stderr, "Can not bind socket: %s", strerror(errno)); + return -1; + } + avr->gdb = g; + return 0; +} diff --git a/simavr/sim/sim_gdb.h b/simavr/sim/sim_gdb.h new file mode 100644 index 0000000..67f7a07 --- /dev/null +++ b/simavr/sim/sim_gdb.h @@ -0,0 +1,25 @@ +/* + sim_gdb.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef __SIM_GDB_H__ +#define __SIM_GDB_H__ + +#endif diff --git a/simavr/sim/simavr.c b/simavr/sim/simavr.c new file mode 100644 index 0000000..39481dc --- /dev/null +++ b/simavr/sim/simavr.c @@ -0,0 +1,356 @@ +/* + simavr.c + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include "simavr.h" +#include "sim_elf.h" + +#include "sim_core.h" +#include "avr_eeprom.h" + +void hdump(const char *w, uint8_t *b, size_t l) +{ + uint32_t i; + if (l < 16) { + printf("%s: ",w); + for (i = 0; i < l; i++) printf("%02x",b[i]); + } else { + printf("%s:\n",w); + for (i = 0; i < l; i++) { + if (!(i & 0x1f)) printf(" "); + printf("%02x",b[i]); + if ((i & 0x1f) == 0x1f) { + printf(" "); + printf("\n"); + } + } + } + printf("\n"); +} + + + +int avr_init(avr_t * avr) +{ + avr->flash = malloc(avr->flashend + 1); + memset(avr->flash, 0xff, avr->flashend + 1); + avr->data = malloc(avr->ramend + 1); + memset(avr->data, 0, avr->ramend + 1); + + avr->state = cpu_Running; + avr->frequency = 1000000; // can be overriden via avr_mcu_section + + if (avr->init) + avr->init(avr); + avr_reset(avr); + return 0; +} + +void avr_reset(avr_t * avr) +{ + memset(avr->data, 0x0, avr->ramend + 1); + _avr_sp_set(avr, avr->ramend); + avr->pc = 0; + for (int i = 0; i < 8; i++) + avr->sreg[i] = 0; + if (avr->reset) + avr->reset(avr); + + avr_io_t * port = avr->io_port; + while (port) { + if (port->reset) + port->reset(avr, port); + port = port->next; + } + +} + +int avr_ioctl(avr_t *avr, uint32_t ctl, void * io_param) +{ + avr_io_t * port = avr->io_port; + int res = -1; + while (port && res == -1) { + if (port->ioctl) + res = port->ioctl(avr, port, ctl, io_param); + port = port->next; + } + return res; +} + +void avr_register_io(avr_t *avr, avr_io_t * io) +{ + io->next = avr->io_port; + avr->io_port = io; +} + +void avr_register_io_read(avr_t *avr, uint8_t addr, avr_io_read_t readp, void * param) +{ + avr->ior[AVR_DATA_TO_IO(addr)].param = param; + avr->ior[AVR_DATA_TO_IO(addr)].r = readp; +} + +void avr_register_io_write(avr_t *avr, uint8_t addr, avr_io_write_t writep, void * param) +{ + avr->iow[AVR_DATA_TO_IO(addr)].param = param; + avr->iow[AVR_DATA_TO_IO(addr)].w = writep; +} + +void avr_register_vector(avr_t *avr, avr_int_vector_t * vector) +{ + if (vector->vector) + avr->vector[vector->vector] = vector; +} + +int avr_has_pending_interupts(avr_t * avr) +{ + return avr->pending[0] || avr->pending[1]; +} + +int avr_is_interupt_pending(avr_t * avr, avr_int_vector_t * vector) +{ + return avr->pending[vector->vector >> 5] & (1 << (vector->vector & 0x1f)); +} + +void avr_raise_interupt(avr_t * avr, avr_int_vector_t * vector) +{ + if (!vector->vector) + return; +// printf("%s raising %d\n", __FUNCTION__, vector->vector); + if (vector->enable.reg) { + if (!avr_regbit_get(avr, vector->enable)) + return; + } + if (!avr_is_interupt_pending(avr, vector)) { + if (!avr->pending_wait) + avr->pending_wait = 2; // latency on interupts ?? + avr->pending[vector->vector >> 5] |= (1 << (vector->vector & 0x1f)); + + if (vector->raised.reg) + avr_regbit_set(avr, vector->raised); + if (avr->state != cpu_Running) { + // printf("Waking CPU due to interrupt\n"); + avr->state = cpu_Running; // in case we were sleeping + } + } +} + +static void avr_clear_interupt(avr_t * avr, int v) +{ + avr_int_vector_t * vector = avr->vector[v]; + avr->pending[v >> 5] &= ~(1 << (v & 0x1f)); + if (!vector) + return; + printf("%s cleared %d\n", __FUNCTION__, vector->vector); + if (vector->raised.reg) + avr_regbit_clear(avr, vector->raised); +} + +void avr_loadcode(avr_t * avr, uint8_t * code, uint32_t size, uint32_t address) +{ + memcpy(avr->flash + address, code, size); +} + +void avr_core_watch_write(avr_t *avr, uint16_t addr, uint8_t v) +{ + if (addr > avr->ramend) { + printf("*** Invalid write address PC=%04x SP=%04x O=%04x Address %04x=%02x out of ram\n", + avr->pc, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc]<<8), addr, v); + CRASH(); + } + if (addr < 32) { + printf("*** Invalid write address PC=%04x SP=%04x O=%04x Address %04x=%02x low registers\n", + avr->pc, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc]<<8), addr, v); + CRASH(); + } +#if 0 + /* + * this only happend when the compiler is doctoring the stack before calls. Or + * if there is an invalid pointer somewhere... + */ + if (addr > _avr_sp_get(avr)) { + avr->trace++; + STATE("\e[31mmunching stack SP %04x, A=%04x <= %02x\e[0m\n", _avr_sp_get(avr), addr, v); + avr->trace--; + } +#endif + avr->data[addr] = v; +} + +uint8_t avr_core_watch_read(avr_t *avr, uint16_t addr) +{ + if (addr > avr->ramend) { + printf("*** Invalid read address PC=%04x SP=%04x O=%04x Address %04x out of ram (%04x)\n", + avr->pc, _avr_sp_get(avr), avr->flash[avr->pc] | (avr->flash[avr->pc]<<8), addr, avr->ramend); + CRASH(); + } + return avr->data[addr]; +} + +/* + * check wether interupts are pending. I so, check if the interupt "latency" is reached, + * and if so triggers the handlers and jump to the vector. + */ +static void avr_service_interupts(avr_t * avr) +{ + if (!avr->sreg[S_I]) + return; + + if (avr_has_pending_interupts(avr)) { + if (avr->pending_wait) { + avr->pending_wait--; + if (avr->pending_wait == 0) { + int done = 0; + for (int bi = 0; bi < 2 && !done; bi++) if (avr->pending[bi]) { + for (int ii = 0; ii < 32 && !done; ii++) + if (avr->pending[bi] & (1 << ii)) { + + int v = (bi * 32) + ii; // vector + + // printf("%s calling %d\n", __FUNCTION__, v); + _avr_push16(avr, avr->pc >> 1); + avr->sreg[S_I] = 0; + avr->pc = v * avr->vector_size; + + avr_clear_interupt(avr, v); + done++; + break; + } + break; + } + } + } else + avr->pending_wait = 2; // for next one... + } +} + + +int avr_run(avr_t * avr) +{ + if (avr->state == cpu_Stopped) + return avr->state; + + uint16_t new_pc = avr->pc; + + if (avr->state == cpu_Running) { + new_pc = avr_run_one(avr); + avr_dump_state(avr); + } else + avr->cycle ++; + + // re-synth the SREG + //SREG(); + // if we just re-enabled the interrupts... + if (avr->sreg[S_I] && !(avr->data[R_SREG] & (1 << S_I))) { + // printf("*** %s: Renabling interupts\n", __FUNCTION__); + avr->pending_wait++; + } + avr_io_t * port = avr->io_port; + while (port) { + if (port->run) + port->run(avr, port); + port = port->next; + } + + avr->pc = new_pc; + + if (avr->state == cpu_Sleeping) { + if (!avr->sreg[S_I]) { + printf("simavr: sleeping with interupts off, quitting gracefuly\n"); + exit(0); + } + usleep(500); + long sleep = (float)avr->frequency * (1.0f / 500.0f); + avr->cycle += sleep; + // avr->state = cpu_Running; + } + // Interrupt servicing might change the PC too + if (avr->state == cpu_Running || avr->state == cpu_Sleeping) { + avr_service_interupts(avr); + + avr->data[R_SREG] = 0; + for (int i = 0; i < 8; i++) + if (avr->sreg[i] > 1) { + printf("** Invalid SREG!!\n"); + CRASH(); + } else if (avr->sreg[i]) + avr->data[R_SREG] |= (1 << i); + } + return avr->state; +} + +extern avr_kind_t tiny85; +extern avr_kind_t mega48,mega88,mega168; +extern avr_kind_t mega644; + +avr_kind_t * avr_kind[] = { + &tiny85, + &mega48, + &mega88, + &mega168, + &mega644, + NULL +}; + +int main(int argc, const char **argv) +{ + elf_firmware_t f; + + elf_read_firmware(argv[1], &f); + + printf("firmware %s f=%ld mmcu=%s\n", argv[1], f.mmcu.f_cpu, f.mmcu.name); + + avr_kind_t * maker = NULL; + for (int i = 0; avr_kind[i] && !maker; i++) { + for (int j = 0; avr_kind[i]->names[j]; j++) + if (!strcmp(avr_kind[i]->names[j], f.mmcu.name)) { + maker = avr_kind[i]; + break; + } + } + if (!maker) { + fprintf(stderr, "%s: AVR '%s' now known\n", argv[0], f.mmcu.name); + exit(1); + } + + avr_t * avr = maker->make(); + printf("Starting %s - flashend %04x ramend %04x e2end %04x\n", avr->mmcu, avr->flashend, avr->ramend, avr->e2end); + avr_init(avr); + avr->frequency = f.mmcu.f_cpu; + avr->codeline = f.codeline; + avr_loadcode(avr, f.flash, f.flashsize, 0); + avr->codeend = f.flashsize - f.datasize; + if (f.eeprom && f.eesize) { + avr_eeprom_desc_t d = { .ee = f.eeprom, .offset = 0, .size = f.eesize }; + avr_ioctl(avr, AVR_IOCTL_EEPROM_SET, &d); + } +// avr->trace = 1; + + for (long long i = 0; i < 8000000*10; i++) +// for (long long i = 0; i < 80000; i++) + avr_run(avr); + +} diff --git a/simavr/sim/simavr.h b/simavr/sim/simavr.h new file mode 100644 index 0000000..bc1fd3f --- /dev/null +++ b/simavr/sim/simavr.h @@ -0,0 +1,313 @@ +/* + simavr.h + + Copyright 2008, 2009 Michel Pollet + + This file is part of simavr. + + simavr is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + simavr is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with simavr. If not, see . + */ + +#ifndef __SIMAVR_H__ +#define __SIMAVR_H__ + +#include + +struct avr_t; +typedef uint8_t (*avr_io_read_t)(struct avr_t * avr, uint8_t addr, void * param); +typedef void (*avr_io_write_t)(struct avr_t * avr, uint8_t addr, uint8_t v, void * param); + +enum { + // SREG bit indexes + S_C = 0,S_Z,S_N,S_V,S_S,S_H,S_T,S_I, + + // 16 bits register pairs + R_XL = 0x1a, R_XH,R_YL,R_YH,R_ZL,R_ZH, + // stack pointer + R_SPL = 32+0x3d, R_SPH, + // real SREG + R_SREG = 32+0x3f, + + // maximum number of IO regisrer, on normal AVRs + MAX_IOs = 256 - 32, // minus 32 GP registers +}; + +#define AVR_DATA_TO_IO(v) ((v) - 32) +#define AVR_IO_TO_DATA(v) ((v) + 32) + +/* + * Core states. This will need populating with debug states for gdb + */ +enum { + cpu_Stopped, + cpu_Running, + cpu_Sleeping, +}; + +/* + * Main AVR instance. Some of these fields are set by the AVR "Core" definition files + * the rest is runtime data (as little as possible) + */ +typedef struct avr_t { + const char * mmcu; // name of the AVR + // these are filled by sim_core_declare from constants in /usr/lib/avr/include/avr/io*.h + uint16_t ramend; + uint32_t flashend; + uint32_t e2end; + uint8_t vector_size; + uint8_t signature[3]; + uint8_t fuse[4]; + + // filled by the ELF data, this allow tracking of invalid jumps + uint32_t codeend; + + int state; // stopped, running, sleeping + uint32_t frequency; // frequency we are running at + uint64_t cycle; // current cycle + + // called at init time + void (*init)(struct avr_t * avr); + // called at reset time + void (*reset)(struct avr_t * avr); + + // Mirror of the SREG register, to facilitate the access to bits + // in the opcode decoder. + // This array is re-synthetized back/forth when SREG changes + uint8_t sreg[8]; + + /* + * ** current PC ** + * Note that the PC is reoresenting /bytes/ while the AVR value is + * assumed to be "words". This is in line with what GDB does... + * this is why you will see >>1 ane <<1 in the decoder to handle jumps + */ + uint32_t pc; + + /* + * callback when specific IO registers are read/written + */ + struct { + void * param; + avr_io_read_t r; + } ior[MAX_IOs]; + struct { + void * param; + avr_io_write_t w; + } iow[MAX_IOs]; + + // flash memory (initialized to 0xff, and code loaded into it) + uint8_t * flash; + // this is the general purpose registers, IO registers, and SRAM + uint8_t * data; + + // queue of io modules + struct avr_io_t *io_port; + + // interupt vectors, and their enable/clear registers + struct avr_int_vector_t * vector[64]; + uint8_t pending_wait; // number of cycles to wait for pending + uint32_t pending[2]; // pending interupts + + // DEBUG ONLY + int trace; + struct avr_symbol_t ** codeline; + + /* DEBUG ONLY + * this keeps track of "jumps" ie, call,jmp,ret,reti and so on + * allows dumping of a meaningful data even if the stack is + * munched and so on + */ + #define OLD_PC_SIZE 32 + struct { + uint32_t pc; + uint16_t sp; + } old[OLD_PC_SIZE]; // catches reset.. + int old_pci; + + // DEBUG ONLY + // keeps track of wich registers gets touched by instructions + // reset before each new instructions. Allows meaningful traces + uint32_t touched[256 / 32]; // debug + + // placeholder + struct avr_gdb_t * gdb; +} avr_t; + + +// this is a static constructor for each of the AVR devices +typedef struct avr_kind_t { + const char * names[4]; // name aliases + avr_t * (*make)(); +} avr_kind_t; + +// a symbol loaded from the .elf file +typedef struct avr_symbol_t { + const char * symbol; + uint32_t addr; +} avr_symbol_t; + +/* + * this 'structure' is a packed representation of an IO register 'bit' + * (or consecutive bits). This allows a way to set/get/clear them. + * gcc is happy passing these as register value, so you don't need to + * use a pointer when passing them along to functions. + */ +typedef struct avr_regbit_t { + unsigned long reg : 8, bit : 3, mask : 8; +} avr_regbit_t; + +// interupt vector for the IO modules +typedef struct avr_int_vector_t { + uint8_t vector; // vector number, zero (reset) is reserved + + avr_regbit_t enable; // IO register index for the "interupt enable" flag for this vector + avr_regbit_t raised; // IO register index for the register where the "raised" flag is (optional) +} avr_int_vector_t; + +/* + * used by the ioports to implement their own features + * see avr_eeprom.* for an example, and avr_ioctl(). + */ +#define AVR_IOCTL_DEF(_a,_b,_c,_d) \ + (((_a) << 24)|((_b) << 16)|((_c) << 8)|((_d))) + +/* + * IO module base struct + * Modules uses that as their first member in their own struct + */ +typedef struct avr_io_t { + struct avr_io_t * next; + const char * kind; + // called at every instruction + void (*run)(avr_t * avr, struct avr_io_t *io); + // called at reset time + void (*reset)(avr_t * avr, struct avr_io_t *io); + // called externally. allow access to io modules and so on + int (*ioctl)(avr_t * avr, struct avr_io_t *io, uint32_t ctl, void *io_param); +} avr_io_t; + +// initializes a new AVR instance. Will call the IO registers init(), and then reset() +int avr_init(avr_t * avr); +// resets the AVR, and the IO modules +void avr_reset(avr_t * avr); + +// load code in the "flash" +void avr_loadcode(avr_t * avr, uint8_t * code, uint32_t size, uint32_t address); + +/* + * IO modules helper functions + */ + +// registers an IO module, so it's run(), reset() etc are called +// this is called by the AVR core init functions, you /could/ register an external +// one after instanciation, for whatever purpose... +void avr_register_io(avr_t *avr, avr_io_t * io); +// register a callback for when IO register "addr" is read +void avr_register_io_read(avr_t *avr, uint8_t addr, avr_io_read_t read, void * param); +// register a callback for when the IO register is written. callback has to set the memory itself +void avr_register_io_write(avr_t *avr, uint8_t addr, avr_io_write_t write, void * param); +// call every IO modules until one responds to this +int avr_ioctl(avr_t *avr, uint32_t ctl, void * io_param); + +/* + * Interupt Helper Functions + */ +// register an interupt vector. It's only needed if you want to use the "r_raised" flags +void avr_register_vector(avr_t *avr, avr_int_vector_t * vector); +// raise an interupt (if enabled). The interupt is latched and will be called later +void avr_raise_interupt(avr_t * avr, avr_int_vector_t * vector); +// return non-zero if the AVR core has any pending interupts +int avr_has_pending_interupts(avr_t * avr); +// return nonzero if a soecific interupt vector is pending +int avr_is_interupt_pending(avr_t * avr, avr_int_vector_t * vector); + +/* + * these are accessors for avr->data but allows watchpoints to be set for gdb + * IO modules use that to set values to registers, and the AVR core decoder uses + * that to register "public" read by instructions. + */ +void avr_core_watch_write(avr_t *avr, uint16_t addr, uint8_t v); +uint8_t avr_core_watch_read(avr_t *avr, uint16_t addr); + + +/* + * These accessors are inlined and are used to perform the operations on + * avr_regbit_t definitions. This is the "official" way to access bits into registers + * The small footorint costs brings much better versatility for functions/bits that are + * not always defined in the same place on real AVR cores + */ +/* + * set/get/clear io register bits in one operation + */ +static inline uint8_t avr_regbit_set(avr_t * avr, avr_regbit_t rb) +{ + uint8_t a = rb.reg; + if (!a) + return 0; + uint8_t m = rb.mask << rb.bit; + avr_core_watch_write(avr, a, avr->data[a] | m); + return (avr->data[a] >> rb.bit) & rb.mask; +} + +static inline uint8_t avr_regbit_setto(avr_t * avr, avr_regbit_t rb, uint8_t v) +{ + uint8_t a = rb.reg; + if (!a) + return 0; + uint8_t m = rb.mask << rb.bit; + avr_core_watch_write(avr, a, (avr->data[a] & ~(m)) | ((v << rb.bit) & m)); + return (avr->data[a] >> rb.bit) & rb.mask; +} + +static inline uint8_t avr_regbit_get(avr_t * avr, avr_regbit_t rb) +{ + uint8_t a = rb.reg; + if (!a) + return 0; + //uint8_t m = rb.mask << rb.bit; + return (avr->data[a] >> rb.bit) & rb.mask; +} + +static inline uint8_t avr_regbit_clear(avr_t * avr, avr_regbit_t rb) +{ + uint8_t a = (rb.reg); + uint8_t m = rb.mask << rb.bit; + avr_core_watch_write(avr, a, avr->data[a] & ~m); + return avr->data[a]; +} + +#define ARRAY_SIZE(_aa) (sizeof(_aa) / sizeof((_aa)[0])) + +/* + * This reads the bits for an array of avr_regbit_t, make up a "byte" with them. + * This allows reading bits like CS0, CS1, CS2 etc even if they are not in the same + * physical IO register. + */ +static inline uint8_t avr_regbit_get_array(avr_t * avr, avr_regbit_t *rb, int count) +{ + uint8_t res = 0; + + for (int i = 0; i < count; i++, rb++) if (rb->reg) { + uint8_t a = (rb->reg); + res |= ((avr->data[a] >> rb->bit) & rb->mask) << i; + } + return res; +} + +#define AVR_IO_REGBIT(_io, _bit) { . reg = (_io), .bit = (_bit), .mask = 1 } +#define AVR_IO_REGBITS(_io, _bit, _mask) { . reg = (_io), .bit = (_bit), .mask = (_mask) } + + +#endif /*__SIMAVR_H__*/ + diff --git a/tests/Makefile b/tests/Makefile new file mode 100644 index 0000000..ff2ede5 --- /dev/null +++ b/tests/Makefile @@ -0,0 +1,54 @@ +# +# This makefile take each "at*" file, extracts it's part name +# And compile it into an ELF binary. +# It also disassemble it for debugging purposes. +# +# The code is compiled "optimized" to the max. +# +# The wierd "-Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000" +# is used to tell the linker not to discard the .mmcu section, +# otherwise the --gc-sections will delete it. +# +# Copyright 2008, 2009 Michel Pollet +# +# This file is part of simavr. +# +# simavr is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# simavr is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with simavr. If not, see . + +sources := $(wildcard at*.c) + +all : ${sources:.c=.axf} ${sources:.c=.hex} ${sources:.c=.s} + +%.hex: %.axf + @avr-objcopy -j .text -j .data -O ihex ${<} ${@} + +%.s: %.axf + @avr-objdump -j .text -j .data -j .bss -d ${<} > ${@} + +%.axf: %.c + @echo CC ${<} + @part=${<} ; part=$${part/_*}; \ + avr-gcc -Wall -g -Os -std=gnu99 \ + -mmcu=$$part \ + -DF_CPU=8000000 \ + -mcall-prologues -fno-inline-small-functions \ + -ffunction-sections -fdata-sections \ + -Wl,--relax,--gc-sections \ + -Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000 \ + -I../include \ + ${<} -o ${@} + @avr-size ${@}|sed '1d' + +clean: + rm -f *.hex *.o *.axf *.s diff --git a/tests/atmega88_example.c b/tests/atmega88_example.c new file mode 100644 index 0000000..fd15e94 --- /dev/null +++ b/tests/atmega88_example.c @@ -0,0 +1,54 @@ +/* + atmega88_example.c + + */ + +#ifndef F_CPU +#define F_CPU 8000000 +#endif +#include +#include +#include +#include +#include + +/* + * This demonstrate how to use the avr_mcu_section.h file + * The macro adds a section to the ELF file with useful + * information for the simulator + */ +#include "avr_mcu_section.h" +AVR_MCU(F_CPU, "atmega88"); + +/* declare this in a .eeprom ELF section */ +uint32_t value EEMEM = 0xdeadbeef; + +static int uart_putchar(char c, FILE *stream) { + if (c == '\n') + uart_putchar('\r', stream); + loop_until_bit_is_set(UCSR0A, UDRE0); + UDR0 = c; + return 0; +} + +static FILE mystdout = FDEV_SETUP_STREAM(uart_putchar, NULL, + _FDEV_SETUP_WRITE); + + +int main() +{ + stdout = &mystdout; + + // read the eeprom value + uint32_t c = eeprom_read_dword((void*)&value); + printf("Read from eeprom 0x%08lx -- should be 0xdeadbeef\n", c); + // change the eeprom + eeprom_write_dword((void*)&value, 0xcafef00d); + // re-read it + c = eeprom_read_dword((void*)&value); + printf("Read from eeprom 0x%08lx -- should be 0xcafef00d\n", c); + + // this quits the simulator, since interupts are off + // this is a "feature" that allows running tests cases and exit + sleep_cpu(); +} -- 2.39.5