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added locked TLB entries

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This commit is contained in:
Markus Fröschle
2014-06-20 19:50:49 +00:00
parent 46740deb38
commit 180a81aa80
1 changed files with 41 additions and 0 deletions
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41
BaS_gcc/sys/mmu.c
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@@ -178,6 +178,7 @@ extern uint8_t _SYS_SRAM[];
#define SYS_SRAM_ADDRESS ((uint32_t) &_SYS_SRAM[0]) #define SYS_SRAM_ADDRESS ((uint32_t) &_SYS_SRAM[0])
extern uint8_t _SYS_SRAM_SIZE[]; extern uint8_t _SYS_SRAM_SIZE[];
extern uint8_t _FASTRAM_END[]; extern uint8_t _FASTRAM_END[];
extern uint32_t TOS;
struct mmu_mapping struct mmu_mapping
{ {
@@ -190,6 +191,14 @@ struct mmu_mapping
static struct mmu_mapping locked_map[] = static struct mmu_mapping locked_map[] =
{ {
{
/* first Megabyte of physical memory */
0x0, /* physical address */
0x0, /* virtual address */
0x100000, /* 1 MByte */
MMU_PAGE_SIZE_1M,
{ CACHE_COPYBACK, SV_USER, 0, ACCESS_READ | ACCESS_WRITE | ACCESS_EXECUTE },
},
{ {
/* Falcon video memory. Needs special care */ /* Falcon video memory. Needs special care */
0x60d00000, 0x60d00000,
@@ -198,6 +207,38 @@ static struct mmu_mapping locked_map[] =
MMU_PAGE_SIZE_1M, MMU_PAGE_SIZE_1M,
{ CACHE_WRITETHROUGH, SV_USER, SCA_PAGE_ID, ACCESS_READ | ACCESS_WRITE | ACCESS_EXECUTE }, { CACHE_WRITETHROUGH, SV_USER, SCA_PAGE_ID, ACCESS_READ | ACCESS_WRITE | ACCESS_EXECUTE },
}, },
{
/* TOS in SDRAM */
TOS,
TOS,
0x100000,
MMU_PAGE_SIZE_1M,
{ CACHE_COPYBACK, SV_USER, 0, ACCESS_READ | ACCESS_EXECUTE },
},
{
/* Firebee I/O area */
0xfff00000,
0x00f00000,
0x100000,
MMU_PAGE_SIZE_1M,
{ CACHE_NOCACHE_PRECISE, SV_USER, 0, ACCESS_READ | ACCESS_WRITE },
},
{
/* BaS in RAM */
SDRAM_START + SDRAM_SIZE - 0x00200000,
SDRAM_START + SDRAM_SIZE - 0x00200000,
0x100000,
MMU_PAGE_SIZE_1M,
{ CACHE_WRITETHROUGH, SV_PROTECT, 0, ACCESS_READ | ACCESS_WRITE | ACCESS_EXECUTE },
},
{
/* driver memory */
SDRAM_START + SDRAM_SIZE - 0x00100000,
SDRAM_START + SDRAM_SIZE - 0x00100000,
0x100000,
MMU_PAGE_SIZE_1M,
{ CACHE_NOCACHE_PRECISE, SV_PROTECT, ACCESS_READ | ACCESS_WRITE | ACCESS_EXECUTE },
},
}; };
static int num_locked_mmu_maps = sizeof(locked_map) / sizeof(struct mmu_mapping); static int num_locked_mmu_maps = sizeof(locked_map) / sizeof(struct mmu_mapping);