/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_PGTABLE_DEFS_H
#define _ASM_X86_PGTABLE_DEFS_H
#include <linux/const.h>
#include <linux/mem_encrypt.h>
#include <asm/page_types.h>
#define FIRST_USER_ADDRESS 0UL
#define _PAGE_BIT_PRESENT 0 /* is present */
#define _PAGE_BIT_RW 1 /* writeable */
#define _PAGE_BIT_USER 2 /* userspace addressable */
#define _PAGE_BIT_PWT 3 /* page write through */
#define _PAGE_BIT_PCD 4 /* page cache disabled */
#define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */
#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */
#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
#define _PAGE_BIT_PAT 7 /* on 4KB pages */
#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
#define _PAGE_BIT_SOFTW1 9 /* available for programmer */
#define _PAGE_BIT_SOFTW2 10 /* " */
#define _PAGE_BIT_SOFTW3 11 /* " */
#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
#define _PAGE_BIT_SOFTW4 58 /* available for programmer */
#define _PAGE_BIT_PKEY_BIT0 59 /* Protection Keys, bit 1/4 */
#define _PAGE_BIT_PKEY_BIT1 60 /* Protection Keys, bit 2/4 */
#define _PAGE_BIT_PKEY_BIT2 61 /* Protection Keys, bit 3/4 */
#define _PAGE_BIT_PKEY_BIT3 62 /* Protection Keys, bit 4/4 */
#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
#define _PAGE_BIT_SPECIAL _PAGE_BIT_SOFTW1
#define _PAGE_BIT_CPA_TEST _PAGE_BIT_SOFTW1
#define _PAGE_BIT_SOFT_DIRTY _PAGE_BIT_SOFTW3 /* software dirty tracking */
#define _PAGE_BIT_DEVMAP _PAGE_BIT_SOFTW4
/* If _PAGE_BIT_PRESENT is clear, we use these: */
/* - if the user mapped it with PROT_NONE; pte_present gives true */
#define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL
#define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
#define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW)
#define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER)
#define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
#define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
#define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
#define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
#define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
#define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
#define _PAGE_SOFTW1 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW1)
#define _PAGE_SOFTW2 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW2)
#define _PAGE_SOFTW3 (_AT(pteval_t, 1) << _PAGE_BIT_SOFTW3)
#define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
#define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
#ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
#define _PAGE_PKEY_BIT0 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT0)
#define _PAGE_PKEY_BIT1 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT1)
#define _PAGE_PKEY_BIT2 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT2)
#define _PAGE_PKEY_BIT3 (_AT(pteval_t, 1) << _PAGE_BIT_PKEY_BIT3)
#else
#define _PAGE_PKEY_BIT0 (_AT(pteval_t, 0))
#define _PAGE_PKEY_BIT1 (_AT(pteval_t, 0))
#define _PAGE_PKEY_BIT2 (_AT(pteval_t, 0))
#define _PAGE_PKEY_BIT3 (_AT(pteval_t, 0))
#endif
#define _PAGE_PKEY_MASK (_PAGE_PKEY_BIT0 | \
_PAGE_PKEY_BIT1 | \
_PAGE_PKEY_BIT2 | \
_PAGE_PKEY_BIT3)
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
#define _PAGE_KNL_ERRATUM_MASK (_PAGE_DIRTY | _PAGE_ACCESSED)
#else
#define _PAGE_KNL_ERRATUM_MASK 0
#endif
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_SOFT_DIRTY)
#else
#define _PAGE_SOFT_DIRTY (_AT(pteval_t, 0))
#endif
/*
* Tracking soft dirty bit when a page goes to a swap is tricky.
* We need a bit which can be stored in pte _and_ not conflict
* with swap entry format. On x86 bits 1-4 are *not* involved
* into swap entry computation, but bit 7 is used for thp migration,
* so we borrow bit 1 for soft dirty tracking.
*
* Please note that this bit must be treated as swap dirty page
* mark if and only if the PTE/PMD has present bit clear!
*/
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _PAGE_SWP_SOFT_DIRTY _PAGE_RW
#else
#define _PAGE_SWP_SOFT_DIRTY (_AT(pteval_t, 0))
#endif
#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
#define _PAGE_DEVMAP (_AT(u64, 1) << _PAGE_BIT_DEVMAP)
#define __HAVE_ARCH_PTE_DEVMAP
#else
#define _PAGE_NX (_AT(pteval_t, 0))
#define _PAGE_DEVMAP (_AT(pteval_t, 0))
#endif
#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
#define _PAGE_TABLE_NOENC (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |\
_PAGE_ACCESSED | _PAGE_DIRTY)
#define _KERNPG_TABLE_NOENC (_PAGE_PRESENT | _PAGE_RW | \
_PAGE_ACCESSED | _PAGE_DIRTY)
/*
* Set of bits not changed in pte_modify. The pte's
* protection key is treated like _PAGE_RW, for
* instance, and is *not* included in this mask since
* pte_modify() does modify it.
*/
#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
_PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
_PAGE_SOFT_DIRTY | _PAGE_DEVMAP)
#define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
/*
* The cache modes defined here are used to translate between pure SW usage
* and the HW defined cache mode bits and/or PAT entries.
*
* The resulting bits for PWT, PCD and PAT should be chosen in a way
* to have the WB mode at index 0 (all bits clear). This is the default
* right now and likely would break too much if changed.
*/
#ifndef __ASSEMBLY__
enum page_cache_mode {
_PAGE_CACHE_MODE_WB = 0,
_PAGE_CACHE_MODE_WC = 1,
_PAGE_CACHE_MODE_UC_MINUS = 2,
_PAGE_CACHE_MODE_UC = 3,
_PAGE_CACHE_MODE_WT = 4,
_PAGE_CACHE_MODE_WP = 5,
_PAGE_CACHE_MODE_NUM = 8
};
#endif
#define _PAGE_CACHE_MASK (_PAGE_PAT | _PAGE_PCD | _PAGE_PWT)
#define _PAGE_NOCACHE (cachemode2protval(_PAGE_CACHE_MODE_UC))
#define _PAGE_CACHE_WP (cachemode2protval(_PAGE_CACHE_MODE_WP))
#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
_PAGE_ACCESSED | _PAGE_NX)
#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \
_PAGE_USER | _PAGE_ACCESSED)
#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
_PAGE_ACCESSED | _PAGE_NX)
#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
_PAGE_ACCESSED)
#define PAGE_COPY PAGE_COPY_NOEXEC
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \
_PAGE_ACCESSED | _PAGE_NX)
#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \
_PAGE_ACCESSED)
#define __PAGE_KERNEL_EXEC \
(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_NOCACHE)
#define __PAGE_KERNEL_VVAR (__PAGE_KERNEL_RO | _PAGE_USER)
#define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE)
#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
#define __PAGE_KERNEL_WP (__PAGE_KERNEL | _PAGE_CACHE_WP)
#define __PAGE_KERNEL_IO (__PAGE_KERNEL)
#define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE)
#ifndef __ASSEMBLY__
#define _PAGE_ENC (_AT(pteval_t, sme_me_mask))
#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
_PAGE_DIRTY | _PAGE_ENC)
#define _PAGE_TABLE (_KERNPG_TABLE | _PAGE_USER)
#define __PAGE_KERNEL_ENC (__PAGE_KERNEL | _PAGE_ENC)
#define __PAGE_KERNEL_ENC_WP (__PAGE_KERNEL_WP | _PAGE_ENC)
#define __PAGE_KERNEL_NOENC (__PAGE_KERNEL)
#define __PAGE_KERNEL_NOENC_WP (__PAGE_KERNEL_WP)
#define default_pgprot(x) __pgprot((x) & __default_kernel_pte_mask)
#define PAGE_KERNEL default_pgprot(__PAGE_KERNEL | _PAGE_ENC)
#define PAGE_KERNEL_NOENC default_pgprot(__PAGE_KERNEL)
#define PAGE_KERNEL_RO default_pgprot(__PAGE_KERNEL_RO | _PAGE_ENC)
#define PAGE_KERNEL_EXEC default_pgprot(__PAGE_KERNEL_EXEC | _PAGE_ENC)
#define PAGE_KERNEL_EXEC_NOENC default_pgprot(__PAGE_KERNEL_EXEC)
#define PAGE_KERNEL_RX default_pgprot(__PAGE_KERNEL_RX | _PAGE_ENC)
#define PAGE_KERNEL_NOCACHE default_pgprot(__PAGE_KERNEL_NOCACHE | _PAGE_ENC)
#define PAGE_KERNEL_LARGE default_pgprot(__PAGE_KERNEL_LARGE | _PAGE_ENC)
#define PAGE_KERNEL_LARGE_EXEC default_pgprot(__PAGE_KERNEL_LARGE_EXEC | _PAGE_ENC)
#define PAGE_KERNEL_VVAR default_pgprot(__PAGE_KERNEL_VVAR | _PAGE_ENC)
#define PAGE_KERNEL_IO default_pgprot(__PAGE_KERNEL_IO)
#define PAGE_KERNEL_IO_NOCACHE default_pgprot(__PAGE_KERNEL_IO_NOCACHE)
#endif /* __ASSEMBLY__ */
/* xwr */
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
#define __P010 PAGE_COPY
#define __P011 PAGE_COPY
#define __P100 PAGE_READONLY_EXEC
#define __P101 PAGE_READONLY_EXEC
#define __P110 PAGE_COPY_EXEC
#define __P111 PAGE_COPY_EXEC
#define __S000 PAGE_NONE
#define __S001 PAGE_READONLY
#define __S010 PAGE_SHARED
#define __S011 PAGE_SHARED
#define __S100 PAGE_READONLY_EXEC
#define __S101 PAGE_READONLY_EXEC
#define __S110 PAGE_SHARED_EXEC
#define __S111 PAGE_SHARED_EXEC
/*
* early identity mapping pte attrib macros.
*/
#ifdef CONFIG_X86_64
#define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC
#else
#define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
#define PDE_IDENT_ATTR 0x063 /* PRESENT+RW+DIRTY+ACCESSED */
#define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
#endif
#ifdef CONFIG_X86_32
# include <asm/pgtable_32_types.h>
#else
# include <asm/pgtable_64_types.h>
#endif
#ifndef __ASSEMBLY__
#include <linux/types.h>
/* Extracts the PFN from a (pte|pmd|pud|pgd)val_t of a 4KB page */
#define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK)
/*
* Extracts the flags from a (pte|pmd|pud|pgd)val_t
* This includes the protection key value.
*/
#define PTE_FLAGS_MASK (~PTE_PFN_MASK)
typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
typedef struct { pgdval_t pgd; } pgd_t;
#ifdef CONFIG_X86_PAE
/*
* PHYSICAL_PAGE_MASK might be non-constant when SME is compiled in, so we can't
* use it here.
*/
#define PGD_PAE_PAGE_MASK ((signed long)PAGE_MASK)
#define PGD_PAE_PHYS_MASK (((1ULL << __PHYSICAL_MASK_SHIFT)-1) & PGD_PAE_PAGE_MASK)
/*
* PAE allows Base Address, P, PWT, PCD and AVL bits to be set in PGD entries.
* All other bits are Reserved MBZ
*/
#define PGD_ALLOWED_BITS (PGD_PAE_PHYS_MASK | _PAGE_PRESENT | \
_PAGE_PWT | _PAGE_PCD | \
_PAGE_SOFTW1 | _PAGE_SOFTW2 | _PAGE_SOFTW3)
#else
/* No need to mask any bits for !PAE */
#define PGD_ALLOWED_BITS (~0ULL)
#endif
static inline pgd_t native_make_pgd(pgdval_t val)
{
return (pgd_t) { val & PGD_ALLOWED_BITS };
}
static inline pgdval_t native_pgd_val(pgd_t pgd)
{
return pgd.pgd & PGD_ALLOWED_BITS;
}
static inline pgdval_t pgd_flags(pgd_t pgd)
{
return native_pgd_val(pgd) & PTE_FLAGS_MASK;
}
#if CONFIG_PGTABLE_LEVELS > 4
typedef struct { p4dval_t p4d; } p4d_t;
static inline p4d_t native_make_p4d(pudval_t val)
{
return (p4d_t) { val };
}
static inline p4dval_t native_p4d_val(p4d_t p4d)
{
return p4d.p4d;
}
#else
#include <asm-generic/pgtable-nop4d.h>
static inline p4d_t native_make_p4d(pudval_t val)
{
return (p4d_t) { .pgd = native_make_pgd((pgdval_t)val) };
}
static inline p4dval_t native_p4d_val(p4d_t p4d)
{
return native_pgd_val(p4d.pgd);
}
#endif
#if CONFIG_PGTABLE_LEVELS > 3
typedef struct { pudval_t pud; } pud_t;
static inline pud_t native_make_pud(pmdval_t val)
{
return (pud_t) { val };
}
static inline pudval_t native_pud_val(pud_t pud)
{
return pud.pud;
}
#else
#include <asm-generic/pgtable-nopud.h>
static inline pud_t native_make_pud(pudval_t val)
{
return (pud_t) { .p4d.pgd = native_make_pgd(val) };
}
static inline pudval_t native_pud_val(pud_t pud)
{
return native_pgd_val(pud.p4d.pgd);
}
#endif
#if CONFIG_PGTABLE_LEVELS > 2
typedef struct { pmdval_t pmd; } pmd_t;
static inline pmd_t native_make_pmd(pmdval_t val)
{
return (pmd_t) { val };
}
static inline pmdval_t native_pmd_val(pmd_t pmd)
{
return pmd.pmd;
}
#else
#include <asm-generic/pgtable-nopmd.h>
static inline pmd_t native_make_pmd(pmdval_t val)
{
return (pmd_t) { .pud.p4d.pgd = native_make_pgd(val) };
}
static inline pmdval_t native_pmd_val(pmd_t pmd)
{
return native_pgd_val(pmd.pud.p4d.pgd);
}
#endif
static inline p4dval_t p4d_pfn_mask(p4d_t p4d)
{
/* No 512 GiB huge pages yet */
return PTE_PFN_MASK;
}
static inline p4dval_t p4d_flags_mask(p4d_t p4d)
{
return ~p4d_pfn_mask(p4d);
}
static inline p4dval_t p4d_flags(p4d_t p4d)
{
return native_p4d_val(p4d) & p4d_flags_mask(p4d);
}
static inline pudval_t pud_pfn_mask(pud_t pud)
{
if (native_pud_val(pud) & _PAGE_PSE)
return PHYSICAL_PUD_PAGE_MASK;
else
return PTE_PFN_MASK;
}
static inline pudval_t pud_flags_mask(pud_t pud)
{
return ~pud_pfn_mask(pud);
}
static inline pudval_t pud_flags(pud_t pud)
{
return native_pud_val(pud) & pud_flags_mask(pud);
}
static inline pmdval_t pmd_pfn_mask(pmd_t pmd)
{
if (native_pmd_val(pmd) & _PAGE_PSE)
return PHYSICAL_PMD_PAGE_MASK;
else
return PTE_PFN_MASK;
}
static inline pmdval_t pmd_flags_mask(pmd_t pmd)
{
return ~pmd_pfn_mask(pmd);
}
static inline pmdval_t pmd_flags(pmd_t pmd)
{
return native_pmd_val(pmd) & pmd_flags_mask(pmd);
}
static inline pte_t native_make_pte(pteval_t val)
{
return (pte_t) { .pte = val };
}
static inline pteval_t native_pte_val(pte_t pte)
{
return pte.pte;
}
static inline pteval_t pte_flags(pte_t pte)
{
return native_pte_val(pte) & PTE_FLAGS_MASK;
}
#define pgprot_val(x) ((x).pgprot)
#define __pgprot(x) ((pgprot_t) { (x) } )
extern uint16_t __cachemode2pte_tbl[_PAGE_CACHE_MODE_NUM];
extern uint8_t __pte2cachemode_tbl[8];
#define __pte2cm_idx(cb) \
((((cb) >> (_PAGE_BIT_PAT - 2)) & 4) | \
(((cb) >> (_PAGE_BIT_PCD - 1)) & 2) | \
(((cb) >> _PAGE_BIT_PWT) & 1))
#define __cm_idx2pte(i) \
((((i) & 4) << (_PAGE_BIT_PAT - 2)) | \
(((i) & 2) << (_PAGE_BIT_PCD - 1)) | \
(((i) & 1) << _PAGE_BIT_PWT))
static inline unsigned long cachemode2protval(enum page_cache_mode pcm)
{
if (likely(pcm == 0))
return 0;
return __cachemode2pte_tbl[pcm];
}
static inline pgprot_t cachemode2pgprot(enum page_cache_mode pcm)
{
return __pgprot(cachemode2protval(pcm));
}
static inline enum page_cache_mode pgprot2cachemode(pgprot_t pgprot)
{
unsigned long masked;
masked = pgprot_val(pgprot) & _PAGE_CACHE_MASK;
if (likely(masked == 0))
return 0;
return __pte2cachemode_tbl[__pte2cm_idx(masked)];
}
static inline pgprot_t pgprot_4k_2_large(pgprot_t pgprot)
{
pgprotval_t val = pgprot_val(pgprot);
pgprot_t new;
pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
((val & _PAGE_PAT) << (_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
return new;
}
static inline pgprot_t pgprot_large_2_4k(pgprot_t pgprot)
{
pgprotval_t val = pgprot_val(pgprot);
pgprot_t new;
pgprot_val(new) = (val & ~(_PAGE_PAT | _PAGE_PAT_LARGE)) |
((val & _PAGE_PAT_LARGE) >>
(_PAGE_BIT_PAT_LARGE - _PAGE_BIT_PAT));
return new;
}
typedef struct page *pgtable_t;
extern pteval_t __supported_pte_mask;
extern pteval_t __default_kernel_pte_mask;
extern void set_nx(void);
extern int nx_enabled;
#define pgprot_writecombine pgprot_writecombine
extern pgprot_t pgprot_writecombine(pgprot_t prot);
#define pgprot_writethrough pgprot_writethrough
extern pgprot_t pgprot_writethrough(pgprot_t prot);
/* Indicate that x86 has its own track and untrack pfn vma functions */
#define __HAVE_PFNMAP_TRACKING
#define __HAVE_PHYS_MEM_ACCESS_PROT
struct file;
pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t vma_prot);
/* Install a pte for a particular vaddr in kernel space. */
void set_pte_vaddr(unsigned long vaddr, pte_t pte);
#ifdef CONFIG_X86_32
extern void native_pagetable_init(void);
#else
#define native_pagetable_init paging_init
#endif
struct seq_file;
extern void arch_report_meminfo(struct seq_file *m);
enum pg_level {
PG_LEVEL_NONE,
PG_LEVEL_4K,
PG_LEVEL_2M,
PG_LEVEL_1G,
PG_LEVEL_512G,
PG_LEVEL_NUM
};
#ifdef CONFIG_PROC_FS
extern void update_page_count(int level, unsigned long pages);
#else
static inline void update_page_count(int level, unsigned long pages) { }
#endif
/*
* Helper function that returns the kernel pagetable entry controlling
* the virtual address 'address'. NULL means no pagetable entry present.
* NOTE: the return type is pte_t but if the pmd is PSE then we return it
* as a pte too.
*/
extern pte_t *lookup_address(unsigned long address, unsigned int *level);
extern pte_t *lookup_address_in_pgd(pgd_t *pgd, unsigned long address,
unsigned int *level);
extern pmd_t *lookup_pmd_address(unsigned long address);
extern phys_addr_t slow_virt_to_phys(void *__address);
extern int __init kernel_map_pages_in_pgd(pgd_t *pgd, u64 pfn,
unsigned long address,
unsigned numpages,
unsigned long page_flags);
extern int __init kernel_unmap_pages_in_pgd(pgd_t *pgd, unsigned long address,
unsigned long numpages);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_PGTABLE_DEFS_H */
