mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-19 18:24:14 +08:00
288 lines
7.8 KiB
C
288 lines
7.8 KiB
C
#ifndef _ASM_SCORE_PGTABLE_H
|
|
#define _ASM_SCORE_PGTABLE_H
|
|
|
|
#include <linux/const.h>
|
|
#include <asm-generic/pgtable-nopmd.h>
|
|
|
|
#include <asm/fixmap.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/pgtable-bits.h>
|
|
|
|
extern void load_pgd(unsigned long pg_dir);
|
|
extern pte_t invalid_pte_table[PAGE_SIZE/sizeof(pte_t)];
|
|
|
|
/* PGDIR_SHIFT determines what a third-level page table entry can map */
|
|
#define PGDIR_SHIFT 22
|
|
#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
|
|
#define PGDIR_MASK (~(PGDIR_SIZE - 1))
|
|
|
|
/*
|
|
* Entries per page directory level: we use two-level, so
|
|
* we don't really have any PUD/PMD directory physically.
|
|
*/
|
|
#define PGD_ORDER 0
|
|
#define PTE_ORDER 0
|
|
|
|
#define PTRS_PER_PGD 1024
|
|
#define PTRS_PER_PTE 1024
|
|
|
|
#define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE)
|
|
#define FIRST_USER_ADDRESS 0
|
|
|
|
#define VMALLOC_START (0xc0000000UL)
|
|
|
|
#define PKMAP_BASE (0xfd000000UL)
|
|
|
|
#define VMALLOC_END (FIXADDR_START - 2*PAGE_SIZE)
|
|
|
|
#define pte_ERROR(e) \
|
|
printk(KERN_ERR "%s:%d: bad pte %08lx.\n", \
|
|
__FILE__, __LINE__, pte_val(e))
|
|
#define pgd_ERROR(e) \
|
|
printk(KERN_ERR "%s:%d: bad pgd %08lx.\n", \
|
|
__FILE__, __LINE__, pgd_val(e))
|
|
|
|
/*
|
|
* Empty pgd/pmd entries point to the invalid_pte_table.
|
|
*/
|
|
static inline int pmd_none(pmd_t pmd)
|
|
{
|
|
return pmd_val(pmd) == (unsigned long) invalid_pte_table;
|
|
}
|
|
|
|
#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
|
|
|
|
static inline int pmd_present(pmd_t pmd)
|
|
{
|
|
return pmd_val(pmd) != (unsigned long) invalid_pte_table;
|
|
}
|
|
|
|
static inline void pmd_clear(pmd_t *pmdp)
|
|
{
|
|
pmd_val(*pmdp) = ((unsigned long) invalid_pte_table);
|
|
}
|
|
|
|
#define pte_page(x) pfn_to_page(pte_pfn(x))
|
|
#define pte_pfn(x) ((unsigned long)((x).pte >> PAGE_SHIFT))
|
|
#define pfn_pte(pfn, prot) \
|
|
__pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot))
|
|
|
|
#define __pgd_offset(address) pgd_index(address)
|
|
#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
|
|
#define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
|
|
|
|
/* to find an entry in a kernel page-table-directory */
|
|
#define pgd_offset_k(address) pgd_offset(&init_mm, address)
|
|
#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
|
|
|
|
/* to find an entry in a page-table-directory */
|
|
#define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr))
|
|
|
|
/* Find an entry in the third-level page table.. */
|
|
#define __pte_offset(address) \
|
|
(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
|
|
#define pte_offset(dir, address) \
|
|
((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
|
|
#define pte_offset_kernel(dir, address) \
|
|
((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
|
|
|
|
#define pte_offset_map(dir, address) \
|
|
((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
|
|
#define pte_offset_map_nested(dir, address) \
|
|
((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
|
|
#define pte_unmap(pte) ((void)(pte))
|
|
#define pte_unmap_nested(pte) ((void)(pte))
|
|
|
|
/*
|
|
* Bits 9(_PAGE_PRESENT) and 10(_PAGE_FILE)are taken,
|
|
* split up 30 bits of offset into this range:
|
|
*/
|
|
#define PTE_FILE_MAX_BITS 30
|
|
#define pte_to_pgoff(_pte) \
|
|
(((_pte).pte & 0x1ff) | (((_pte).pte >> 11) << 9))
|
|
#define pgoff_to_pte(off) \
|
|
((pte_t) {((off) & 0x1ff) | (((off) >> 9) << 11) | _PAGE_FILE})
|
|
#define __pte_to_swp_entry(pte) \
|
|
((swp_entry_t) { pte_val(pte)})
|
|
#define __swp_entry_to_pte(x) ((pte_t) {(x).val})
|
|
|
|
#define pmd_phys(pmd) __pa((void *)pmd_val(pmd))
|
|
#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
|
|
#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
|
|
static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
|
|
|
|
#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
|
|
#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
|
|
#define pte_clear(mm, addr, xp) \
|
|
do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
|
|
|
|
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
|
|
remap_pfn_range(vma, vaddr, pfn, size, prot)
|
|
|
|
/*
|
|
* The "pgd_xxx()" functions here are trivial for a folded two-level
|
|
* setup: the pgd is never bad, and a pmd always exists (as it's folded
|
|
* into the pgd entry)
|
|
*/
|
|
#define pgd_present(pgd) (1)
|
|
#define pgd_none(pgd) (0)
|
|
#define pgd_bad(pgd) (0)
|
|
#define pgd_clear(pgdp) do { } while (0)
|
|
|
|
#define kern_addr_valid(addr) (1)
|
|
#define pmd_page_vaddr(pmd) pmd_val(pmd)
|
|
|
|
#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
|
|
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
|
|
|
|
#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_CACHE)
|
|
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
|
|
_PAGE_CACHE)
|
|
#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE)
|
|
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_CACHE)
|
|
#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
|
|
_PAGE_GLOBAL | _PAGE_CACHE)
|
|
#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
|
|
__WRITEABLE | _PAGE_GLOBAL & ~_PAGE_CACHE)
|
|
|
|
#define __P000 PAGE_NONE
|
|
#define __P001 PAGE_READONLY
|
|
#define __P010 PAGE_COPY
|
|
#define __P011 PAGE_COPY
|
|
#define __P100 PAGE_READONLY
|
|
#define __P101 PAGE_READONLY
|
|
#define __P110 PAGE_COPY
|
|
#define __P111 PAGE_COPY
|
|
|
|
#define __S000 PAGE_NONE
|
|
#define __S001 PAGE_READONLY
|
|
#define __S010 PAGE_SHARED
|
|
#define __S011 PAGE_SHARED
|
|
#define __S100 PAGE_READONLY
|
|
#define __S101 PAGE_READONLY
|
|
#define __S110 PAGE_SHARED
|
|
#define __S111 PAGE_SHARED
|
|
|
|
#define pgprot_noncached pgprot_noncached
|
|
|
|
static inline pgprot_t pgprot_noncached(pgprot_t _prot)
|
|
{
|
|
unsigned long prot = pgprot_val(_prot);
|
|
|
|
prot = (prot & ~_CACHE_MASK);
|
|
|
|
return __pgprot(prot);
|
|
}
|
|
|
|
#define __swp_type(x) ((x).val & 0x1f)
|
|
#define __swp_offset(x) ((x).val >> 11)
|
|
#define __swp_entry(type, offset) ((swp_entry_t){(type) | ((offset) << 11)})
|
|
|
|
extern unsigned long empty_zero_page;
|
|
extern unsigned long zero_page_mask;
|
|
|
|
#define ZERO_PAGE(vaddr) \
|
|
(virt_to_page((void *)(empty_zero_page + \
|
|
(((unsigned long)(vaddr)) & zero_page_mask))))
|
|
|
|
#define pgtable_cache_init() do {} while (0)
|
|
|
|
#define arch_enter_lazy_cpu_mode() do {} while (0)
|
|
|
|
static inline int pte_write(pte_t pte)
|
|
{
|
|
return pte_val(pte) & _PAGE_WRITE;
|
|
}
|
|
|
|
static inline int pte_dirty(pte_t pte)
|
|
{
|
|
return pte_val(pte) & _PAGE_MODIFIED;
|
|
}
|
|
|
|
static inline int pte_young(pte_t pte)
|
|
{
|
|
return pte_val(pte) & _PAGE_ACCESSED;
|
|
}
|
|
|
|
static inline int pte_file(pte_t pte)
|
|
{
|
|
return pte_val(pte) & _PAGE_FILE;
|
|
}
|
|
|
|
#define pte_special(pte) (0)
|
|
|
|
static inline pte_t pte_wrprotect(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkclean(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkold(pte_t pte)
|
|
{
|
|
pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkwrite(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_WRITE;
|
|
if (pte_val(pte) & _PAGE_MODIFIED)
|
|
pte_val(pte) |= _PAGE_SILENT_WRITE;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkdirty(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_MODIFIED;
|
|
if (pte_val(pte) & _PAGE_WRITE)
|
|
pte_val(pte) |= _PAGE_SILENT_WRITE;
|
|
return pte;
|
|
}
|
|
|
|
static inline pte_t pte_mkyoung(pte_t pte)
|
|
{
|
|
pte_val(pte) |= _PAGE_ACCESSED;
|
|
if (pte_val(pte) & _PAGE_READ)
|
|
pte_val(pte) |= _PAGE_SILENT_READ;
|
|
return pte;
|
|
}
|
|
|
|
#define set_pmd(pmdptr, pmdval) \
|
|
do { *(pmdptr) = (pmdval); } while (0)
|
|
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
|
|
|
|
extern unsigned long pgd_current;
|
|
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
|
|
extern void paging_init(void);
|
|
|
|
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
|
|
{
|
|
return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
|
|
}
|
|
|
|
extern void __update_tlb(struct vm_area_struct *vma,
|
|
unsigned long address, pte_t pte);
|
|
extern void __update_cache(struct vm_area_struct *vma,
|
|
unsigned long address, pte_t pte);
|
|
|
|
static inline void update_mmu_cache(struct vm_area_struct *vma,
|
|
unsigned long address, pte_t pte)
|
|
{
|
|
__update_tlb(vma, address, pte);
|
|
__update_cache(vma, address, pte);
|
|
}
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <asm-generic/pgtable.h>
|
|
|
|
void setup_memory(void);
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_SCORE_PGTABLE_H */
|