75 lines
2.5 KiB
C
75 lines
2.5 KiB
C
#ifndef _ASM_POWERPC_PGTABLE_PPC64_4K_H
|
|
#define _ASM_POWERPC_PGTABLE_PPC64_4K_H
|
|
/*
|
|
* Entries per page directory level. The PTE level must use a 64b record
|
|
* for each page table entry. The PMD and PGD level use a 32b record for
|
|
* each entry by assuming that each entry is page aligned.
|
|
*/
|
|
#define PTE_INDEX_SIZE 9
|
|
#define PMD_INDEX_SIZE 7
|
|
#define PUD_INDEX_SIZE 9
|
|
#define PGD_INDEX_SIZE 9
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define PTE_TABLE_SIZE (sizeof(pte_t) << PTE_INDEX_SIZE)
|
|
#define PMD_TABLE_SIZE (sizeof(pmd_t) << PMD_INDEX_SIZE)
|
|
#define PUD_TABLE_SIZE (sizeof(pud_t) << PUD_INDEX_SIZE)
|
|
#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE)
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
|
|
#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
|
|
#define PTRS_PER_PUD (1 << PUD_INDEX_SIZE)
|
|
#define PTRS_PER_PGD (1 << PGD_INDEX_SIZE)
|
|
|
|
/* PMD_SHIFT determines what a second-level page table entry can map */
|
|
#define PMD_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE)
|
|
#define PMD_SIZE (1UL << PMD_SHIFT)
|
|
#define PMD_MASK (~(PMD_SIZE-1))
|
|
|
|
/* With 4k base page size, hugepage PTEs go at the PMD level */
|
|
#define MIN_HUGEPTE_SHIFT PMD_SHIFT
|
|
|
|
/* PUD_SHIFT determines what a third-level page table entry can map */
|
|
#define PUD_SHIFT (PMD_SHIFT + PMD_INDEX_SIZE)
|
|
#define PUD_SIZE (1UL << PUD_SHIFT)
|
|
#define PUD_MASK (~(PUD_SIZE-1))
|
|
|
|
/* PGDIR_SHIFT determines what a fourth-level page table entry can map */
|
|
#define PGDIR_SHIFT (PUD_SHIFT + PUD_INDEX_SIZE)
|
|
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
|
|
#define PGDIR_MASK (~(PGDIR_SIZE-1))
|
|
|
|
/* Bits to mask out from a PMD to get to the PTE page */
|
|
#define PMD_MASKED_BITS 0
|
|
/* Bits to mask out from a PUD to get to the PMD page */
|
|
#define PUD_MASKED_BITS 0
|
|
/* Bits to mask out from a PGD to get to the PUD page */
|
|
#define PGD_MASKED_BITS 0
|
|
|
|
|
|
/*
|
|
* 4-level page tables related bits
|
|
*/
|
|
|
|
#define pgd_none(pgd) (!pgd_val(pgd))
|
|
#define pgd_bad(pgd) (pgd_val(pgd) == 0)
|
|
#define pgd_present(pgd) (pgd_val(pgd) != 0)
|
|
#define pgd_clear(pgdp) (pgd_val(*(pgdp)) = 0)
|
|
#define pgd_page_vaddr(pgd) (pgd_val(pgd) & ~PGD_MASKED_BITS)
|
|
#define pgd_page(pgd) virt_to_page(pgd_page_vaddr(pgd))
|
|
|
|
#define pud_offset(pgdp, addr) \
|
|
(((pud_t *) pgd_page_vaddr(*(pgdp))) + \
|
|
(((addr) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)))
|
|
|
|
#define pud_ERROR(e) \
|
|
printk("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pud_val(e))
|
|
|
|
/*
|
|
* On all 4K setups, remap_4k_pfn() equates to remap_pfn_range() */
|
|
#define remap_4k_pfn(vma, addr, pfn, prot) \
|
|
remap_pfn_range((vma), (addr), (pfn), PAGE_SIZE, (prot))
|
|
|
|
#endif /* _ASM_POWERPC_PGTABLE_PPC64_4K_H */
|