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461d859e73
This function saves and restores the MMU state so no invalid user input can break CPU execution.
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
//DingusPPC
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//Written by divingkatae and maximum
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//(c)2018-20 (theweirdo) spatium
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//Please ask for permission
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//if you want to distribute this.
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//(divingkatae#1017 or powermax#2286 on Discord)
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// The opcodes for the processor - ppcopcodes.cpp
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#ifndef PPCMEMORY_H
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#define PPCMEMORY_H
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#include <cinttypes>
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#include <vector>
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#include <array>
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/* Uncomment this to exhaustive MMU integrity checks. */
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//#define MMU_INTEGRITY_CHECKS
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/** generic PowerPC BAT descriptor (MMU internal state) */
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typedef struct PPC_BAT_entry {
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uint8_t access; /* copy of Vs | Vp bits */
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uint8_t prot; /* copy of PP bits */
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uint32_t phys_hi; /* high-order bits for physical address generation */
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uint32_t lo_mask; /* mask for low-order logical address bits */
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uint32_t bepi; /* copy of Block effective page index */
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} PPC_BAT_entry;
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extern void ibat_update(uint32_t bat_reg);
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extern void dbat_update(uint32_t bat_reg);
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extern void ppc_set_cur_instruction(const uint8_t* ptr);
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extern void mem_write_byte(uint32_t addr, uint8_t value);
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extern void mem_write_word(uint32_t addr, uint16_t value);
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extern void mem_write_dword(uint32_t addr, uint32_t value);
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extern void mem_write_qword(uint32_t addr, uint64_t value);
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extern uint8_t mem_grab_byte(uint32_t addr);
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extern uint16_t mem_grab_word(uint32_t addr);
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extern uint32_t mem_grab_dword(uint32_t addr);
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extern uint64_t mem_grab_qword(uint32_t addr);
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extern uint64_t mem_read_dbg(uint32_t virt_addr, uint32_t size);
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extern uint8_t* quickinstruction_translate(uint32_t address_grab);
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#endif // PPCMEMORY_H
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