39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
#include <fxos.h>
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/* Shared by all platforms (though ROM is 4M on most) */
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static struct region ROM = { 0x80000000, 0x807fffff, "ROM", MPU_GUESS };
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static struct region RAM = { 0x88000000, 0x88040000, "RAM", MPU_GUESS };
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static struct region P2_ROM = { 0xa0000000, 0xa07fffff, "P2 ROM", MPU_GUESS };
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static struct region P2_RAM = { 0xa8000000, 0xa8040000, "P2 RAM", MPU_GUESS };
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/* SH7305 only */
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static struct region RS = { 0xfd800000, 0xfd8007ff, "RS", MPU_SH7305 };
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static struct region IL = { 0xe5200000, 0xe5203fff, "IL", MPU_SH7305 };
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static struct region XRAM = { 0xe5007000, 0xe5008fff, "XRAM", MPU_SH7305 };
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static struct region YRAM = { 0xe5017000, 0xe5018fff, "YRAM", MPU_SH7305 };
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/* A summary */
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static struct region *regions[] = {
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&ROM, &RAM, &P2_ROM, &P2_RAM, &IL, &RS, NULL,
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};
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/* memory_in(): Check if an address if inside a given region */
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static int memory_in(uint32_t address, struct region const *reg)
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{
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return reg && address >= reg->start && address <= reg->end;
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}
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/* memory_region(): Find the region where an address is located */
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struct region const *memory_region(uint32_t address)
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{
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for(int i = 0; regions[i]; i++)
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{
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if(memory_in(address, regions[i])) return regions[i];
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}
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return NULL;
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}
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