Mark
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/** vim: set ft=cpp.doxygen :
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* @file arch/amd64/mm/map.h
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* @brief amd64-specific virtual memory space functions
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*/
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#pragma once
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#include "sys/types.h"
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#include "sys/mm.h"
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/// Splits userspace mappings and kernelspace ones
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#define AMD64_PML4I_USER_END 255
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/**
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* @brief Translate a virtual address in `space' to its physical mapping (if one exists).
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* May optionally return access flags in `flags' if non-NULL
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* @param space Virtual memory space
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* @param vaddr Virtual address
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* @param flags Access flags storage pointer or NULL
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* @return Physical address corresponding to `vaddr' in `space' if mapping exists,
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* MM_NADDR otherwise.
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*/
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//uintptr_t amd64_map_get(const mm_space_t space, uintptr_t vaddr, uint64_t *flags);
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/**
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* @brief Remove a virtual address mapping from memory space, optionally checking if it
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* is of a specific page size.
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* @param space Virtual memory space
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* @param vaddr Virtual address
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* @param size Expected page size:
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* * 1 for 4KiB
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* * 2 for 2MiB
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* * 3 for 1GiB
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* * 0 for any size
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* @return Physical address of the unmapped page (in case it has to be freed),
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* MM_NADDR in case the mapping does not exist or the size does not match.
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*/
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//uintptr_t amd64_map_umap(mm_space_t space, uintptr_t vaddr, uint32_t size);
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/**
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* @brief Add a single page mapping to `pml4'
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* @param pml4 Virtual memory space
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* @param virt_addr Source virtual address
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* @param phys Destination physical address
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* @param flags Access flags:
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* * TODO: size-specific
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* * AMD64_MAP_WRITE
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* * AMD64_MAP_USER
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* @return 0 on success, -1 otherwise
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*/
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//int amd64_map_single(mm_space_t pml4, uintptr_t virt_addr, uintptr_t phys, uint64_t flags);
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