mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
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211 lines
8.3 KiB
C
211 lines
8.3 KiB
C
/**
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x64 Long Mode Virtual Memory Management Definitions
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References:
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1) IA-32 Intel(R) Architecture Software Developer's Manual Volume 1:Basic Architecture, Intel
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2) IA-32 Intel(R) Architecture Software Developer's Manual Volume 2:Instruction Set Reference, Intel
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3) IA-32 Intel(R) Architecture Software Developer's Manual Volume 3:System Programmer's Guide, Intel
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4) AMD64 Architecture Programmer's Manual Volume 2: System Programming
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Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Extended by dmazar.
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**/
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#ifndef APTIOFIX_VMEM_H
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#define APTIOFIX_VMEM_H
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#pragma pack(push, 1)
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//
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// Page-Map Level-4 Offset (PML4) and
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// Page-Directory-Pointer Offset (PDPE) entries 4K & 2MB
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//
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typedef union {
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struct {
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UINT64 Present:1; // 0 = Not present in memory, 1 = Present in memory
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UINT64 ReadWrite:1; // 0 = Read-Only, 1= Read/Write
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UINT64 UserSupervisor:1; // 0 = Supervisor, 1=User
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UINT64 WriteThrough:1; // 0 = Write-Back caching, 1=Write-Through caching
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UINT64 CacheDisabled:1; // 0 = Cached, 1=Non-Cached
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UINT64 Accessed:1; // 0 = Not accessed, 1 = Accessed (set by CPU)
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UINT64 Reserved:1; // Reserved
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UINT64 MustBeZero:2; // Must Be Zero
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UINT64 Available:3; // Available for use by system software
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UINT64 PageTableBaseAddress:40; // Page Table Base Address
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UINT64 AvabilableHigh:11; // Available for use by system software
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UINT64 Nx:1; // No Execute bit
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} Bits;
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UINT64 Uint64;
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} PAGE_MAP_AND_DIRECTORY_POINTER;
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//
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// Page Table Entry 4KB
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//
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typedef union {
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struct {
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UINT64 Present:1; // 0 = Not present in memory, 1 = Present in memory
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UINT64 ReadWrite:1; // 0 = Read-Only, 1= Read/Write
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UINT64 UserSupervisor:1; // 0 = Supervisor, 1=User
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UINT64 WriteThrough:1; // 0 = Write-Back caching, 1=Write-Through caching
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UINT64 CacheDisabled:1; // 0 = Cached, 1=Non-Cached
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UINT64 Accessed:1; // 0 = Not accessed, 1 = Accessed (set by CPU)
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UINT64 Dirty:1; // 0 = Not Dirty, 1 = written by processor on access to page
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UINT64 PAT:1; //
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UINT64 Global:1; // 0 = Not global page, 1 = global page TLB not cleared on CR3 write
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UINT64 Available:3; // Available for use by system software
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UINT64 PageTableBaseAddress:40; // Page Table Base Address
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UINT64 AvabilableHigh:11; // Available for use by system software
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UINT64 Nx:1; // 0 = Execute Code, 1 = No Code Execution
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} Bits;
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UINT64 Uint64;
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} PAGE_TABLE_4K_ENTRY;
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//
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// Page Table Entry 2MB
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//
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typedef union {
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struct {
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UINT64 Present:1; // 0 = Not present in memory, 1 = Present in memory
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UINT64 ReadWrite:1; // 0 = Read-Only, 1= Read/Write
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UINT64 UserSupervisor:1; // 0 = Supervisor, 1=User
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UINT64 WriteThrough:1; // 0 = Write-Back caching, 1=Write-Through caching
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UINT64 CacheDisabled:1; // 0 = Cached, 1=Non-Cached
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UINT64 Accessed:1; // 0 = Not accessed, 1 = Accessed (set by CPU)
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UINT64 Dirty:1; // 0 = Not Dirty, 1 = written by processor on access to page
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UINT64 MustBe1:1; // Must be 1
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UINT64 Global:1; // 0 = Not global page, 1 = global page TLB not cleared on CR3 write
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UINT64 Available:3; // Available for use by system software
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UINT64 PAT:1; //
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UINT64 MustBeZero:8; // Must be zero;
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UINT64 PageTableBaseAddress:31; // Page Table Base Address
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UINT64 AvabilableHigh:11; // Available for use by system software
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UINT64 Nx:1; // 0 = Execute Code, 1 = No Code Execution
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} Bits;
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UINT64 Uint64;
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} PAGE_TABLE_2M_ENTRY;
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//
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// Page Table Entry 1GB
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//
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typedef union {
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struct {
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UINT64 Present:1; // 0 = Not present in memory, 1 = Present in memory
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UINT64 ReadWrite:1; // 0 = Read-Only, 1= Read/Write
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UINT64 UserSupervisor:1; // 0 = Supervisor, 1=User
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UINT64 WriteThrough:1; // 0 = Write-Back caching, 1=Write-Through caching
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UINT64 CacheDisabled:1; // 0 = Cached, 1=Non-Cached
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UINT64 Accessed:1; // 0 = Not accessed, 1 = Accessed (set by CPU)
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UINT64 Dirty:1; // 0 = Not Dirty, 1 = written by processor on access to page
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UINT64 MustBe1:1; // Must be 1
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UINT64 Global:1; // 0 = Not global page, 1 = global page TLB not cleared on CR3 write
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UINT64 Available:3; // Available for use by system software
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UINT64 PAT:1; //
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UINT64 MustBeZero:17; // Must be zero;
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UINT64 PageTableBaseAddress:22; // Page Table Base Address
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UINT64 AvabilableHigh:11; // Available for use by system software
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UINT64 Nx:1; // 0 = Execute Code, 1 = No Code Execution
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} Bits;
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UINT64 Uint64;
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} PAGE_TABLE_1G_ENTRY;
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typedef union {
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struct {
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UINT64 PhysPgOffset:12; // 0 = Physical Page Offset
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UINT64 PTOffset:9; // 0 = Page Table Offset
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UINT64 PDOffset:9; // 0 = Page Directory Offset
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UINT64 PDPOffset:9; // 0 = Page Directory Pointer Offset
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UINT64 PML4Offset:9; // 0 = Page Map Level 4 Offset
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UINT64 SignExtend:16; // 0 = Sign Extend
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} Pg4K;
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struct {
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UINT64 PhysPgOffset:21; // 0 = Physical Page Offset
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UINT64 PDOffset:9; // 0 = Page Directory Offset
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UINT64 PDPOffset:9; // 0 = Page Directory Pointer Offset
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UINT64 PML4Offset:9; // 0 = Page Map Level 4 Offset
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UINT64 SignExtend:16; // 0 = Sign Extend
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} Pg2M;
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struct {
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UINT64 PhysPgOffset:30; // 0 = Physical Page Offset
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UINT64 PDPOffset:9; // 0 = Page Directory Pointer Offset
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UINT64 PML4Offset:9; // 0 = Page Map Level 4 Offset
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UINT64 SignExtend:16; // 0 = Sign Extend
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} Pg1G;
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UINT64 Uint64;
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} VIRTUAL_ADDR;
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#define VA_FIX_SIGN_EXTEND(VA) VA.Pg4K.SignExtend = (VA.Pg4K.PML4Offset & 0x100) ? 0xFFFF : 0;
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#pragma pack(pop)
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// 64 bit
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#define CR3_ADDR_MASK 0x000FFFFFFFFFF000
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#define CR3_FLAG_PWT 0x0000000000000008
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#define CR3_FLAG_PCD 0x0000000000000010
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#define PT_ADDR_MASK_4K 0x000FFFFFFFFFF000
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#define PT_ADDR_MASK_2M 0x000FFFFFFFE00000
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#define PT_ADDR_MASK_1G 0x000FFFFFC0000000
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/** Returns pointer to PML4 table in PageTable and PWT and PCD flags in Flags. */
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VOID
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GetCurrentPageTable (
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PAGE_MAP_AND_DIRECTORY_POINTER **PageTable,
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UINTN *Flags
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);
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/** Prints given PageTable. */
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VOID
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PrintPageTable (
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PAGE_MAP_AND_DIRECTORY_POINTER *PageTable,
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UINTN Flags
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);
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/** Returns physical addr for given virtual addr. */
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EFI_STATUS
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GetPhysicalAddr (
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PAGE_MAP_AND_DIRECTORY_POINTER *PageTable,
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EFI_VIRTUAL_ADDRESS VirtualAddr,
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EFI_PHYSICAL_ADDRESS *PhysicalAddr
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);
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/** Inits vm memory pool. Should be called while boot services are still usable. */
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EFI_STATUS
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VmAllocateMemoryPool (
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VOID
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);
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/** Maps (remaps) 4K page given by VirtualAddr to PhysicalAddr page in PageTable. */
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EFI_STATUS
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VmMapVirtualPage (
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PAGE_MAP_AND_DIRECTORY_POINTER *PageTable,
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EFI_VIRTUAL_ADDRESS VirtualAddr,
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EFI_PHYSICAL_ADDRESS PhysicalAddr
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);
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/** Maps (remaps) NumPages 4K pages given by VirtualAddr to PhysicalAddr pages in PageTable. */
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EFI_STATUS
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VmMapVirtualPages (
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PAGE_MAP_AND_DIRECTORY_POINTER *PageTable,
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EFI_VIRTUAL_ADDRESS VirtualAddr,
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UINTN NumPages,
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EFI_PHYSICAL_ADDRESS PhysicalAddr
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);
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/** Flushes TLB caches. */
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VOID
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VmFlushCaches (
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VOID
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);
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#endif //APTIOFIX_VMEM_H
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