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https://github.com/citra-emu/citra-canary.git
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95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
#ifndef _MMU_TLB_H_
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#define _MMU_TLB_H_
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typedef enum tlb_mapping_t
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{
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TLB_INVALID = 0,
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TLB_SMALLPAGE = 1,
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TLB_LARGEPAGE = 2,
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TLB_SECTION = 3,
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TLB_ESMALLPAGE = 4,
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TLB_TINYPAGE = 5
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} tlb_mapping_t;
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extern ARMword tlb_masks[];
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/* Permissions bits in a TLB entry:
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*
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* 31 12 11 10 9 8 7 6 5 4 3 2 1 0
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* +-------------+-----+-----+-----+-----+---+---+-------+
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* Page:| | ap3 | ap2 | ap1 | ap0 | C | B | |
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* +-------------+-----+-----+-----+-----+---+---+-------+
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*
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* 31 12 11 10 9 4 3 2 1 0
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* +-------------+-----+-----------------+---+---+-------+
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* Section: | | AP | | C | B | |
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* +-------------+-----+-----------------+---+---+-------+
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*/
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/*
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section:
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section base address [31:20]
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AP - table 8-2, page 8-8
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domain
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C,B
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page:
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page base address [31:16] or [31:12]
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ap[3:0]
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domain (from L1)
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C,B
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*/
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typedef struct tlb_entry_t
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{
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ARMword virt_addr;
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ARMword phys_addr;
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ARMword perms;
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ARMword domain;
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tlb_mapping_t mapping;
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} tlb_entry_t;
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typedef struct tlb_s
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{
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int num; /*num of tlb entry */
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int cycle; /*current tlb cycle */
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tlb_entry_t *entrys;
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} tlb_s;
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#define tlb_c_flag(tlb) \
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((tlb)->perms & 0x8)
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#define tlb_b_flag(tlb) \
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((tlb)->perms & 0x4)
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#define tlb_va_to_pa(tlb, va) \
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(\
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{\
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ARMword mask = tlb_masks[tlb->mapping]; \
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(tlb->phys_addr & mask) | (va & ~mask);\
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}\
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)
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fault_t
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check_access (ARMul_State * state, ARMword virt_addr, tlb_entry_t * tlb,
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int read);
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fault_t
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translate (ARMul_State * state, ARMword virt_addr, tlb_s * tlb_t,
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tlb_entry_t ** tlb);
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int mmu_tlb_init (tlb_s * tlb_t, int num);
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void mmu_tlb_exit (tlb_s * tlb_t);
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void mmu_tlb_invalidate_all (ARMul_State * state, tlb_s * tlb_t);
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void
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mmu_tlb_invalidate_entry (ARMul_State * state, tlb_s * tlb_t, ARMword addr);
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tlb_entry_t *mmu_tlb_search (ARMul_State * state, tlb_s * tlb_t,
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ARMword virt_addr);
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#endif /*_MMU_TLB_H_*/
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