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113 lines
4.1 KiB
113 lines
4.1 KiB
#pragma once
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#include "types.h"
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#pragma section(".pdpt", read, write)
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#pragma section(".pd", read, write)
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#pragma section(".pt", read, write)
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typedef union _virt_addr_t
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{
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void* value;
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struct
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{
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u64 offset : 12;
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u64 pt_index : 9;
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u64 pd_index : 9;
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u64 pdpt_index : 9;
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u64 pml4_index : 9;
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u64 reserved : 16;
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};
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} virt_addr_t, * pvirt_addr_t;
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typedef union _pml4e
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{
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u64 value;
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struct
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{
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u64 present : 1; // Must be 1, region invalid if 0.
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u64 ReadWrite : 1; // If 0, writes not allowed.
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u64 user_supervisor : 1; // If 0, user-mode accesses not allowed.
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u64 PageWriteThrough : 1; // Determines the memory type used to access PDPT.
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u64 page_cache : 1; // Determines the memory type used to access PDPT.
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u64 accessed : 1; // If 0, this entry has not been used for translation.
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u64 Ignored1 : 1;
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u64 page_size : 1; // Must be 0 for PML4E.
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u64 Ignored2 : 4;
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u64 pfn : 36; // The page frame number of the PDPT of this PML4E.
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u64 Reserved : 4;
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u64 Ignored3 : 11;
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u64 nx : 1; // If 1, instruction fetches not allowed.
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};
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} pml4e, * ppml4e;
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typedef union _pdpte
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{
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u64 value;
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struct
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{
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u64 present : 1; // Must be 1, region invalid if 0.
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u64 rw : 1; // If 0, writes not allowed.
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u64 user_supervisor : 1; // If 0, user-mode accesses not allowed.
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u64 PageWriteThrough : 1; // Determines the memory type used to access PD.
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u64 page_cache : 1; // Determines the memory type used to access PD.
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u64 accessed : 1; // If 0, this entry has not been used for translation.
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u64 Ignored1 : 1;
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u64 page_size : 1; // If 1, this entry maps a 1GB page.
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u64 Ignored2 : 4;
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u64 pfn : 36; // The page frame number of the PD of this PDPTE.
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u64 Reserved : 4;
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u64 Ignored3 : 11;
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u64 nx : 1; // If 1, instruction fetches not allowed.
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};
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} pdpte, * ppdpte;
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typedef union _pde
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{
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u64 value;
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struct
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{
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u64 present : 1; // Must be 1, region invalid if 0.
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u64 rw : 1; // If 0, writes not allowed.
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u64 user_supervisor : 1; // If 0, user-mode accesses not allowed.
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u64 PageWriteThrough : 1; // Determines the memory type used to access PT.
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u64 page_cache : 1; // Determines the memory type used to access PT.
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u64 accessed : 1; // If 0, this entry has not been used for translation.
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u64 Ignored1 : 1;
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u64 page_size : 1; // If 1, this entry maps a 2MB page.
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u64 Ignored2 : 4;
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u64 pfn : 36; // The page frame number of the PT of this PDE.
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u64 Reserved : 4;
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u64 Ignored3 : 11;
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u64 nx : 1; // If 1, instruction fetches not allowed.
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};
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} pde, * ppde;
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typedef union _pte
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{
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u64 value;
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struct
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{
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u64 present : 1; // Must be 1, region invalid if 0.
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u64 rw : 1; // If 0, writes not allowed.
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u64 user_supervisor : 1; // If 0, user-mode accesses not allowed.
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u64 PageWriteThrough : 1; // Determines the memory type used to access the memory.
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u64 page_cache : 1; // Determines the memory type used to access the memory.
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u64 accessed : 1; // If 0, this entry has not been used for translation.
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u64 Dirty : 1; // If 0, the memory backing this page has not been written to.
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u64 PageAccessType : 1; // Determines the memory type used to access the memory.
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u64 Global : 1; // If 1 and the PGE bit of CR4 is set, translations are global.
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u64 Ignored2 : 3;
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u64 pfn : 36; // The page frame number of the backing physical page.
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u64 reserved : 4;
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u64 Ignored3 : 7;
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u64 ProtectionKey : 4; // If the PKE bit of CR4 is set, determines the protection key.
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u64 nx : 1; // If 1, instruction fetches not allowed.
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};
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} pte, * ppte;
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namespace pg_table
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{
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__declspec(allocate(".pdpt")) inline pdpte pdpt[512];
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__declspec(allocate(".pd")) inline pde pd[512];
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__declspec(allocate(".pt")) inline pte pt[512];
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} |