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fixed hang because video pages were supervisor protected while TOS puts the application stack there

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This commit is contained in:
Markus Fröschle
2013-12-21 12:04:47 +00:00
parent aea881f0b0
commit 355b93db61
1 changed files with 7 additions and 6 deletions
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13
BaS_gcc/sys/mmu.c
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@@ -50,6 +50,7 @@
#include "MCF5475.h"
#include "pci.h"
#include "cache.h"
#include "util.h"
#if MACHINE_FIREBEE
#include "firebee.h"
#elif MACHINE_M5484LITE
@@ -178,11 +179,12 @@ inline uint32_t set_mmubar(uint32_t value)
: /* no clobber */
);
rt_mmubar = value;
NOP();
return ret;
}
void mmu_init(void)
void __attribute__((flatten)) mmu_init(void)
{
extern uint8_t _MMUBAR[];
uint32_t MMUBAR = (uint32_t) &_MMUBAR[0];
@@ -237,7 +239,7 @@ void mmu_init(void)
/* disable ACR3 */
set_acr3(0x0);
set_mmubar(MMUBAR | 1); /* set and enable MMUBAR */
set_mmubar(MMUBAR + 1); /* set and enable MMUBAR */
/* clear all MMU TLB entries */
MCF_MMU_MMUOR = MCF_MMU_MMUOR_CA;
@@ -277,7 +279,8 @@ void mmu_init(void)
MCF_MMU_MMUDR = 0x60d00000 | /* physical address */
MCF_MMU_MMUDR_SZ(0) | /* 1 MB page size */
MCF_MMU_MMUDR_CM(0x0) | /* cachable writethrough */
MCF_MMU_MMUDR_SP | /* supervisor protect */
/* caveat: can't be supervisor protected since TOS puts the application stack there! */
//MCF_MMU_MMUDR_SP | /* supervisor protect */
MCF_MMU_MMUDR_R | /* read access enable */
MCF_MMU_MMUDR_W | /* write access enable */
MCF_MMU_MMUDR_X | /* execute access enable */
@@ -359,10 +362,8 @@ void mmu_init(void)
MCF_MMU_MMUOR_UAA; /* update allocation address field */
}
void mmutr_miss(void)
void mmutr_miss(uint32_t address)
{
register uint32_t address asm("d0");
dbg_mmu("MMU TLB MISS at 0x%08x\r\n", address);
flush_and_invalidate_caches();