From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/asm-sh/pgtable-2level.h | 67 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 include/asm-sh/pgtable-2level.h (limited to 'include/asm-sh/pgtable-2level.h') diff --git a/include/asm-sh/pgtable-2level.h b/include/asm-sh/pgtable-2level.h new file mode 100644 index 0000000..b0528aa --- /dev/null +++ b/include/asm-sh/pgtable-2level.h @@ -0,0 +1,67 @@ +#ifndef __ASM_SH_PGTABLE_2LEVEL_H +#define __ASM_SH_PGTABLE_2LEVEL_H + +/* + * traditional two-level paging structure: + */ + +#define PGDIR_SHIFT 22 +#define PTRS_PER_PGD 1024 + +/* + * this is two-level, so we don't really have any + * PMD directory physically. + */ +#define PMD_SHIFT 22 +#define PTRS_PER_PMD 1 + +#define PTRS_PER_PTE 1024 + +#ifndef __ASSEMBLY__ +#define pte_ERROR(e) \ + printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) +#define pmd_ERROR(e) \ + printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e)) +#define pgd_ERROR(e) \ + printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) + +/* + * 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) + */ +static inline int pgd_none(pgd_t pgd) { return 0; } +static inline int pgd_bad(pgd_t pgd) { return 0; } +static inline int pgd_present(pgd_t pgd) { return 1; } +static inline void pgd_clear (pgd_t * pgdp) { } + +/* + * Certain architectures need to do special things when PTEs + * within a page table are directly modified. Thus, the following + * hook is made available. + */ +#define set_pte(pteptr, pteval) (*(pteptr) = pteval) +#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) + +/* + * (pmds are folded into pgds so this doesn't get actually called, + * but the define is needed for a generic inline function.) + */ +#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) +#define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval) + +#define pgd_page(pgd) \ +((unsigned long) __va(pgd_val(pgd) & PAGE_MASK)) + +static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address) +{ + return (pmd_t *) dir; +} + +#define pte_pfn(x) ((unsigned long)(((x).pte >> PAGE_SHIFT))) +#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) +#define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)) + +#endif /* !__ASSEMBLY__ */ + +#endif /* __ASM_SH_PGTABLE_2LEVEL_H */ -- cgit v1.1