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Matheus
44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
#ifndef _MMU_H_INCLUDE
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#define _MMU_H_INCLUDE
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#include <stdbool.h>
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#include <stdint.h>
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#include <stddef.h>
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#define KERNELSPACE_START (void *)0xffff800000000000
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#define KERNELSPACE_END (void *)0xffffffffffffffff
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#define USERSPACE_START (void *)0x0000000000001000
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#define USERSPACE_END (void *)0x0000800000000000
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#define IS_USER_ADDRESS(a) ((void *)a < USERSPACE_END)
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#define PAGE_SIZE 4096
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#define ARCH_MMU_FLAGS_READ (uint64_t)1
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#define ARCH_MMU_FLAGS_WRITE (uint64_t)2
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#define ARCH_MMU_FLAGS_USER (uint64_t)4
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#define ARCH_MMU_FLAGS_NOEXEC ((uint64_t)1 << 63)
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#define ARCH_MMU_FLAGS_WB 0
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#define ARCH_MMU_FLAGS_WT (1 << 3)
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#define ARCH_MMU_FLAGS_UC (1 << 4)
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typedef uint64_t mmuflags_t;
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typedef uint64_t * pagetableptr_t; // physical address
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void arch_mmu_destroytable(pagetableptr_t table);
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bool arch_mmu_map(pagetableptr_t table, void *paddr, void *vaddr, mmuflags_t flags);
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void arch_mmu_invalidate(void *vaddr);
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void arch_mmu_unmap(pagetableptr_t table, void *vaddr);
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void arch_mmu_remap(pagetableptr_t table, void *paddr, void *vaddr, mmuflags_t flags);
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void arch_mmu_switch(pagetableptr_t table);
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void *arch_mmu_getphysical(pagetableptr_t table, void *vaddr);
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bool arch_mmu_ispresent(pagetableptr_t table, void *vaddr);
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bool arch_mmu_iswritable(pagetableptr_t table, void *vaddr);
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bool arch_mmu_isdirty(pagetableptr_t table, void *vaddr);
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pagetableptr_t arch_mmu_newtable();
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void arch_mmu_init();
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void arch_mmu_apswitch();
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void arch_mmu_tlbshootdown(void *page);
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#endif
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