62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
#ifndef MMU_H
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#define MMU_H
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#include "../common/types.h"
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typedef void(*mmu_getter_t)(int, char*, void*);
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typedef void(*mmu_setter_t)(int, char, void*);
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typedef struct memory_map_t {
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int pos;
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int len;
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union {
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char* pointer;
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void* opaque;
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};
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mmu_getter_t getter;
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mmu_setter_t setter;
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char access;
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char info;
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} memory_map_t;
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typedef struct mmu_t {
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memory_map_t segments[32];
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char onError;
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char length;
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} mmu_t;
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#define MMU_ACCESS_absent 8
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#define MMU_ACCESS_r 4
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#define MMU_ACCESS_w 2
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#define MMU_ACCESS_x 1
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#define MMU_ONERROR_ZERO 1
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#define MMU_ONERROR_NONE 0
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//byte by byte access
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void Mmu_readByte(mmu_t *mmu, char *byte, int offset);
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void Mmu_writeByte(mmu_t *mmu, char byte, int offset);
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//half word access
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void Mmu_readHalfWord(mmu_t *mmu, half_word_t *half, int offset);
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void Mmu_writeHalfWord(mmu_t *mmu, half_word_t half, int offset);
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//full word access
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void Mmu_readWord(mmu_t *mmu, word_t *word, int offset);
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void Mmu_writeWord(mmu_t *mmu, word_t word, int offset);
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//block access
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void Mmu_readBlock(mmu_t *mmu, void* data, int offset, int length);
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void Mmu_writeBlock(mmu_t *mmu, void* data, int offset, int length);
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//access check
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int Mmu_checkAccess(mmu_t *mmu, int offset);
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//configuration
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int Mmu_addSegment(mmu_t *mmu, int pos, int len, char* pointer, char access, char info);
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int Mmu_addAbsentSegment(mmu_t *mmu, int pos, int len, mmu_getter_t getter, mmu_setter_t setter, void* opaque, char access, char info);
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int Mmu_removeSegment(mmu_t *mmu, int pos);
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void initMMU(mmu_t *mmu);
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#endif
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