From: Doug Goldstein <cardoe@cardoe.com>
Date: Sun, 27 Apr 2014 20:30:41 +0000 (-0500)
Subject: cores: Fix fuse support to handle proper byte size
X-Git-Tag: v1.4~19
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=989158dbf2b4a843e0273c69ff7e3e6d1fbdc335;p=sx%2Fsimavr.git

cores: Fix fuse support to handle proper byte size

avr-libc specifies platforms with only 6, 3, 2, 1, and 0 bytes of fuses.
Previously simavr only had 4 bytes available for fuses and assumed any
platform using the CORE_DECLARE macro would have 3 fuses. This change
allows the CORE_DECLARE macro to support any of the platforms supported
by avr-libc with regard to fuses. Additionally add some defines to make
it clear for users of simavr what order the fuses are in.
---

diff --git a/simavr/cores/sim_core_declare.h b/simavr/cores/sim_core_declare.h
index fa0b8c2..f69e5ca 100644
--- a/simavr/cores/sim_core_declare.h
+++ b/simavr/cores/sim_core_declare.h
@@ -39,13 +39,45 @@
  * This declares a typical AVR core, using constants what appears
  * to be in every io*.h file...
  */
+#if FUSE_MEMORY_SIZE == 6
+# ifndef FUSE0_DEFAULT
+#  define FUSE0_DEFAULT 0xFF
+# endif
+# ifndef FUSE1_DEFAULT
+#  define FUSE1_DEFAULT 0xFF
+# endif
+# ifndef FUSE2_DEFAULT
+#  define FUSE2_DEFAULT 0xFF
+# endif
+# ifndef FUSE3_DEFAULT
+#  define FUSE3_DEFAULT 0xFF
+# endif
+# ifndef FUSE4_DEFAULT
+#  define FUSE4_DEFAULT 0xFF
+# endif
+# ifndef FUSE5_DEFAULT
+#  define FUSE5_DEFAULT 0xFF
+# endif
+
+# define _FUSE_HELPER { FUSE1_DEFAULT, FUSE1_DEFAULT, FUSE2_DEFAULT, \
+	FUSE3_DEFAULT, FUSE4_DEFAULT, FUSE5_DEFAULT }
+#elif FUSE_MEMORY_SIZE == 3
+# define _FUSE_HELPER { LFUSE_DEFAULT, HFUSE_DEFAULT, EFUSE_DEFAULT }
+#elif FUSE_MEMORY_SIZE == 2
+# define _FUSE_HELPER { LFUSE_DEFAULT, HFUSE_DEFAULT }
+#elif FUSE_MEMORY_SIZE == 1
+# define _FUSE_HELPER { FUSE_DEFAULT }
+#else
+# define _FUSE_HELPER { 0 }
+#endif
+
 #ifdef SIGNATURE_0
 #define DEFAULT_CORE(_vector_size) \
 	.ramend = RAMEND, \
 	.flashend = FLASHEND, \
 	.e2end = E2END, \
 	.vector_size = _vector_size, \
-	.fuse = { LFUSE_DEFAULT, HFUSE_DEFAULT, EFUSE_DEFAULT }, \
+	.fuse = _FUSE_HELPER, \
 	.signature = { SIGNATURE_0,SIGNATURE_1,SIGNATURE_2 }
 #else
 // Disable signature when using an old avr toolchain
diff --git a/simavr/sim/sim_avr.h b/simavr/sim/sim_avr.h
index 4c433f6..cb12166 100644
--- a/simavr/sim/sim_avr.h
+++ b/simavr/sim/sim_avr.h
@@ -135,6 +135,10 @@ struct avr_trace_data_t {
 typedef void (*avr_run_t)(
 		struct avr_t * avr);
 
+#define AVR_FUSE_LOW	0
+#define AVR_FUSE_HIGH	1
+#define AVR_FUSE_EXT	2
+
 /*
  * Main AVR instance. Some of these fields are set by the AVR "Core" definition files
  * the rest is runtime data (as little as possible)
@@ -147,7 +151,7 @@ typedef struct avr_t {
 	uint32_t	e2end;
 	uint8_t		vector_size;
 	uint8_t		signature[3];
-	uint8_t		fuse[4];
+	uint8_t		fuse[6];
 	avr_io_addr_t	rampz;	// optional, only for ELPM/SPM on >64Kb cores
 	avr_io_addr_t	eind;	// optional, only for EIJMP/EICALL on >64Kb cores
 	uint8_t		address_size;	// 2, or 3 for cores >128KB in flash