BaS_GNU/Makefile

@@ -33,7 +33,6 @@ LDCFILE=flash.lk
 EXEC=bas.s19
 
 CSRCS= \
-	$(SRCDIR)/startcf.c \
 	$(SRCDIR)/sysinit.c \
 	$(SRCDIR)/init_fpga.c \
 	$(SRCDIR)/BaS.c \
@@ -48,6 +47,8 @@ ASRCS= \
 	$(SRCDIR)/ewf.S \
 	$(SRCDIR)/illegal_instruction.S 
 
+STRT_SRC = startcf.S
+STRT_OBJ = $(OBJDIR)/startcf.o
 COBJS=$(patsubst $(SRCDIR)/%.o,$(OBJDIR)/%.o,$(patsubst %.c,%.o,$(CSRCS)))
 AOBJS=$(patsubst $(SRCDIR)/%.o,$(OBJDIR)/%.o,$(patsubst %.S,%.o,$(ASRCS)))
 
@@ -58,7 +59,7 @@ OBJS=$(COBJS) $(AOBJS)
 .PHONY clean:
 	@ rm -f $(EXEC) $(OBJS) $(MAPFILE) depend
 	
-$(EXEC): $(OBJS) $(LDCFILE)
+$(EXEC): $(STRT_OBJ) $(OBJS) $(LDCFILE)
 	$(LD) --oformat srec -Map $(MAPFILE) --cref -T flash.lk -s -o $@ 
 
 # compile init_fpga with -mbitfield for testing purposes

BaS_GNU/sources/sd_ide.c

@@ -1,10 +1,7 @@
-
-
 #include "MCF5475.h"
 #include "startcf.h"
 
-extern unsigned long __SP_AFTER_RESET[];
-extern unsigned long __Bas_base[];
+
 
 /* imported routines */
 //extern int warten_20ms();

BaS_GNU/sources/startcf.S

@@ -1,4 +1,4 @@
-#include <MCF5475.h>
+		.equ	MCF_MMU_MMUCR, __MMUBAR + 0
 
 _startup:
 		.extern	_initialize_hardware

BaS_GNU/sources/startcf.c

@@ -1,54 +0,0 @@
-#include <MCF5475.h>
-
-void startup(void)
-{
-	__asm__ __volatile__(
-		"		.extern	_initialize_hardware\n\t"
-
-		"		bra.s	warmstart\n\t"
-		"		jmp		___BOOT_FLASH + 8\n\t" 		/* that's also our reset vector */
-
-		/* disable interrupts */
-		"warmstart:\n\t"
-		"		move.w #0x2700,sr\n\t"
-		/* output */ :
-		/* input */ :
-		/* clobber */ : "d0", "memory");
-
-	/* Initialize MBAR */
-	__asm__ __volatile__(
-		"		MOVE.L	#__MBAR,D0\n\t"
-		"		MOVEC	D0,MBAR\n\t"
-		"		MOVE.L	D0,_rt_mbar\n\t"
-		/* output */ :
-		/* input */ :
-		/* clobber */ : "d0", "memory");
-
-	/* mmu off */
-	__asm__ __volatile__(
-		"		move.l	#__MMUBAR+1,d0\n\t"
-		"		movec	d0,MMUBAR\n\t"
-		/* output */ :
-		/* input */ :
-		/* clobber */ : "d0", "memory");
-
-	MCF_MMU_MMUCR = 0L;	/* MMU off */
-
-	__asm__ __volatile__(
-		/* Initialize RAMBARs: locate SRAM and validate it */
-		"		move.l	#__RAMBAR0 + 0x7,d0\n\t" 	/* supervisor only */
-		"		movec	d0,RAMBAR0\n\t"
-		"		move.l	#__RAMBAR1 + 0x1,d0\n\t"
-		"		movec	d0,RAMBAR1\n\t"
-		/* set stack pointer to end of SRAM1 */
-		"		lea 	__SUP_SP,a7\n\t"
-		/* instruction cache on */
-		"		move.l	#0x000C8100,d0\n\t"
-		"		movec	d0,cacr\n\t"
-		"		nop\n\t"
-		/* initialize any hardware specific issues */
-		"		bra    _initialize_hardware\n\t"
-		/* output */ :
-		/* input */ :
-		/* clobber */ : "d0", "memory");
-}

BaS_GNU/sources/startcf.h

@@ -1,26 +1,4 @@
-/******************************************************************************
-  FILE    : startcf.h
-  PURPOSE : startup code for ColdFire
-  LANGUAGE: C
-
-
-  Notes:
-        1) Default entry point is _startup. 
-           . disable interrupts
-           . the SP is set to __SP_AFTER_RESET
-           . SP must be initialized to valid memory 
-             in case the memory it points to is not valid using MEMORY_INIT macro
-        2) __initialize_hardware is called. Here you can initialize memory and some peripherics
-           at this point global variables are not initialized yet
-        3) After __initialize_hardware memory is setup; initialize SP to _SP_INIT and perform 
-           needed initialisations for the language (clear memory, data rom copy).
-        4) void __initialize_system(void); is called
-           to allow additional hardware initialization (UART, GPIOs, etc...)
-        5) Jump to main 
-
-*/
-/********************************************************************************/
-
+#ifdef _NOT_USED_
 #define cf_stack
 
 //#define ii_on
@@ -39,6 +17,7 @@
 #define halten_exg
 #define halten_movep
 #define halten_ewf
+#endif /* _NOT_USED_ */
 
 #define DIP_SWITCH		(*(volatile uint8_t *)(&_MBAR[0xA2C]))
 #define DIP_SWITCHa		__MBAR + 0xA2C