105 lines
3.8 KiB
C
105 lines
3.8 KiB
C
/*
|
|
* E2K ISET X86 emulation page table structure and common definitions.
|
|
*
|
|
* Copyright 2017 Salavat S. Guiliazov (atic@mcst.ru)
|
|
*/
|
|
|
|
#ifndef _ASM_E2K_KVM_PGTABLE_X86_H
|
|
#define _ASM_E2K_KVM_PGTABLE_X86_H
|
|
|
|
/*
|
|
* This file contains the functions and defines necessary to modify and
|
|
* use the E2K ISET V1-V5 page tables.
|
|
* NOTE: E2K has four levels of page tables.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/pgtable_types.h>
|
|
|
|
|
|
/* max. number of physical address bits (architected) */
|
|
#define MAX_PHYS_BITS_X86_32 32
|
|
#define MAX_PHYS_BITS_X86_64 48
|
|
|
|
/* virtual & physical page definitions */
|
|
#define PAGE_SHIFT_X86 12
|
|
#define PAGE_SIZE_X86 (1ULL << PAGE_SHIFT_X86)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* PTE format
|
|
*/
|
|
|
|
#define _PAGE_BIT_PRESENT_X86 0 /* is present */
|
|
#define _PAGE_W_BIT_X86 1 /* bit # of Writable */
|
|
#define _PAGE_BIT_USER_X86 2 /* userspace addressable */
|
|
#define _PAGE_BIT_PWT_X86 3 /* page write through */
|
|
#define _PAGE_BIT_PCD_X86 4 /* page cache disabled */
|
|
#define _PAGE_BIT_ACCESSED_X86 5 /* was accessed (raised by CPU) */
|
|
#define _PAGE_BIT_DIRTY_X86 6 /* was written to (raised by CPU) */
|
|
#define _PAGE_BIT_PSE_X86 7 /* 4 MB (or 2MB) page */
|
|
#define _PAGE_BIT_PAT_X86 7 /* on 4KB pages */
|
|
#define _PAGE_BIT_GLOBAL_X86 8 /* Global TLB entry */
|
|
#define _PAGE_BIT_PAT_LARGE_X86 12 /* On 2MB or 1GB pages */
|
|
#define _PAGE_PFN_SHIFT_X86 12 /* shift of PFN field */
|
|
#define _PAGE_BIT_NX_X86 63 /* No execute: only valid after */
|
|
/* cpuid check */
|
|
|
|
#define _PAGE_P_X86 (1ULL << _PAGE_BIT_PRESENT_X86)
|
|
#define _PAGE_W_X86 (1ULL << _PAGE_W_BIT_X86)
|
|
#define _PAGE_USER_X86 (1ULL << _PAGE_BIT_USER_X86)
|
|
#define _PAGE_PWT_X86 (1ULL << _PAGE_BIT_PWT_X86)
|
|
#define _PAGE_PCD_X86 (1ULL << _PAGE_BIT_PCD_X86)
|
|
#define _PAGE_A_X86 (1ULL << _PAGE_BIT_ACCESSED_X86)
|
|
#define _PAGE_D_X86 (1ULL << _PAGE_BIT_DIRTY_X86)
|
|
#define _PAGE_PSE_X86 (1ULL << _PAGE_BIT_PSE_X86)
|
|
#define _PAGE_PAT_X86 (1ULL << _PAGE_BIT_PAT_X86)
|
|
#define _PAGE_G_X86 (1ULL << _PAGE_BIT_GLOBAL_X86)
|
|
#define _PAGE_PAT_LARGE_X86 (1ULL << _PAGE_BIT_PAT_LARGE_X86)
|
|
#define _PAGE_NX_X86_32 (0ULL) /* has not such protection */
|
|
#define _PAGE_NX_X86_PAE (1ULL << _PAGE_BIT_NX_X86)
|
|
#define _PAGE_NX_X86_64 (1ULL << _PAGE_BIT_NX_X86)
|
|
|
|
#define _PAGE_PFN_X86_32 /* 0x0000_0000_ffff_f000 */ \
|
|
((((1ULL << MAX_PHYS_BITS_X86_32) - 1) >> \
|
|
PAGE_SHIFT_X86) << \
|
|
_PAGE_PFN_SHIFT_X86)
|
|
#define _PAGE_PFN_X86_64 /* 0x0000_ffff_ffff_f000 */ \
|
|
((((1ULL << MAX_PHYS_BITS_X86_64) - 1) >> \
|
|
PAGE_SHIFT_X86) << \
|
|
_PAGE_PFN_SHIFT_X86)
|
|
|
|
/* Page table entries format */
|
|
typedef u32 pt_element_x86_32_t;
|
|
typedef u64 pt_element_x86_64_t;
|
|
|
|
#define X86_PTE_LEVEL_NUM 1 /* level number of native pte */
|
|
#define X86_32_PGD_LEVEL_NUM 2 /* level number of pgd for 32 bits */
|
|
/* physical & virtual addresses mode */
|
|
#define X86_PAE_PGD_LEVEL_NUM 3 /* level number of pgd for 48 bits */
|
|
/* physical & 32 bits virtual */
|
|
/* addresses mode */
|
|
#define X86_64_PGD_LEVEL_NUM 4 /* level number of pgd for 48 bits */
|
|
/* physical & 48 bits virtual */
|
|
/* addresses mode */
|
|
#define X86_PDPE_LEVEL_NUM 3 /* pgd for PAE mode */
|
|
#define X86_DIRECTORY_LEVEL_NUM 2 /* from this level starts direcrory */
|
|
/* levels of PT */
|
|
|
|
#define MAX_HUGE_PAGES_LEVEL_X86_32 X86_32_PGD_LEVEL_NUM
|
|
#define MAX_HUGE_PAGES_LEVEL_X86_PAE (X86_PAE_PGD_LEVEL_NUM - 1)
|
|
#define MAX_HUGE_PAGES_LEVEL_X86_64 MAX_HUGE_PAGES_LEVEL
|
|
|
|
/* one page table occupies on 4K page */
|
|
#define PT_ENT_SHIFT_X86_32 2 /* 4 bytes, 2 bits */
|
|
#define PT_ENT_SHIFT_X86_64 3 /* 8 bytes, 3 bits */
|
|
#define PT_ENT_BITS_X86_32 (PAGE_SHIFT_X86 - PT_ENT_SHIFT_X86_32)
|
|
#define PT_ENT_BITS_X86_64 (PAGE_SHIFT_X86 - PT_ENT_SHIFT_X86_64)
|
|
#define PT_ENT_PER_PAGE_X86_32 (1 << PT_ENT_BITS_X86_32)
|
|
#define PT_ENT_PER_PAGE_X86_64 (1 << PT_ENT_BITS_X86_64)
|
|
|
|
#endif /* ! __ASSEMBLY__ */
|
|
|
|
#endif /* ! _ASM_E2K_KVM_PGTABLE_X86_H */
|