forked from Mirror/GodMode9
2f86686388
- added initial SCU twiddling - added very untested and unusable SMP code - fixed race condition that happened on boot - added initial MMU code (just super basic identity mapping, no caching set up or anything) - enabled some of the fancier ARMv6 features - reorganized ARM11 files into their own folders - possibly more stuff I'm forgetting about
29 lines
705 B
C
Executable File
29 lines
705 B
C
Executable File
#include <types.h>
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#include <arm.h>
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#include "arm/mmu.h"
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static u32 __attribute__((aligned(16384))) MMU_TranslationTable[4096];
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// Currently just does a super simple identity mapping
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// with all sections set to uncacheable/unbufferable
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// and no access limitations (RW and no NX bit set)
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void MMU_PopulateTranslationTable(void)
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{
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for (int i = 0; i < 4096; i++) {
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MMU_TranslationTable[i] = (i << 20) | (3 << 10) | 2;
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}
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}
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void MMU_Init(void)
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{
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u32 ttbr0 = (u32)(&MMU_TranslationTable) | 0x12;
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ARM_MCR(p15, 0, ttbr0, c2, c0, 0);
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ARM_MCR(p15, 0, 0, c2, c0, 1);
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ARM_MCR(p15, 0, 0, c2, c0, 2);
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ARM_MCR(p15, 0, 0x55555555, c3, c0, 0);
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ARM_MCR(p15, 0, 0, c8, c7, 0);
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}
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