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cleanup of startup()

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This commit is contained in:
Markus Fröschle
2012-10-14 06:47:13 +00:00
parent 1555f31976
commit be10263f80
1 changed files with 15 additions and 10 deletions
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25
BaS_GNU/sources/startcf.c
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@@ -1,6 +1,6 @@
#include <MCF5475.h> #include <MCF5475.h>
void _startup(void) void startup(void)
{ {
asm("\n\t" asm("\n\t"
".extern _initialize_hardware\n\t" ".extern _initialize_hardware\n\t"
@@ -10,15 +10,20 @@ void _startup(void)
"warmstart:\n\t" "warmstart:\n\t"
"| disable interrupts\n\t" "| disable interrupts\n\t"
"move.w #0x2700,sr\n\t" "move.w #0x2700,sr\n\t"
"|// Initialize MBAR\n\t" );
"MOVE.L #__MBAR,D0\n\t"
"MOVEC D0,MBAR\n\t" /* Initialize MBAR */
"MOVE.L D0,_rt_mbar\n\t" asm("MOVE.L #__MBAR,D0\n\t");
"| mmu off\n\t" asm("MOVEC D0,MBAR\n\t");
"move.l #__MMUBAR+1,d0\n\t" asm("MOVE.L D0,_rt_mbar\n\t");
"movec d0,MMUBAR | mmubar setzen\n\t"
"clr.l d0\n\t" /* mmu off */
"move.l d0,MCF_MMU_MMUCR\n\t | mmu off" asm("move.l #__MMUBAR+1,d0\n\t");
asm("movec d0,MMUBAR"); /* set mmubar */
* (volatile uint32_t *) MCF_MMU_MMUCR = 0L; /* MMU off */
asm(
"|/* Initialize RAMBARs: locate SRAM and validate it */\n\t" "|/* Initialize RAMBARs: locate SRAM and validate it */\n\t"
"move.l #__RAMBAR0 + 0x7,d0\n\t | supervisor only" "move.l #__RAMBAR0 + 0x7,d0\n\t | supervisor only"
"movec d0,RAMBAR0\n\t" "movec d0,RAMBAR0\n\t"