diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:48:46 +0200 |
commit | 8c82a17e9c924c0e9f13e75e4c2f6bca19a4b516 (patch) | |
tree | d535f46a917e14e90deccb29ad00aac016ad18dd /include/asm-parisc/pgalloc.h | |
parent | 4ce72a2c063a7fa8e42a9435440ae3364115a58d (diff) | |
parent | 57f8f7b60db6f1ed2c6918ab9230c4623a9dbe37 (diff) |
Merge commit 'v2.6.28-rc1' into sched/urgent
Diffstat (limited to 'include/asm-parisc/pgalloc.h')
-rw-r--r-- | include/asm-parisc/pgalloc.h | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/include/asm-parisc/pgalloc.h b/include/asm-parisc/pgalloc.h deleted file mode 100644 index fc987a1c12a..00000000000 --- a/include/asm-parisc/pgalloc.h +++ /dev/null @@ -1,149 +0,0 @@ -#ifndef _ASM_PGALLOC_H -#define _ASM_PGALLOC_H - -#include <linux/gfp.h> -#include <linux/mm.h> -#include <linux/threads.h> -#include <asm/processor.h> -#include <asm/fixmap.h> - -#include <asm/cache.h> - -/* Allocate the top level pgd (page directory) - * - * Here (for 64 bit kernels) we implement a Hybrid L2/L3 scheme: we - * allocate the first pmd adjacent to the pgd. This means that we can - * subtract a constant offset to get to it. The pmd and pgd sizes are - * arranged so that a single pmd covers 4GB (giving a full 64-bit - * process access to 8TB) so our lookups are effectively L2 for the - * first 4GB of the kernel (i.e. for all ILP32 processes and all the - * kernel for machines with under 4GB of memory) */ -static inline pgd_t *pgd_alloc(struct mm_struct *mm) -{ - pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL, - PGD_ALLOC_ORDER); - pgd_t *actual_pgd = pgd; - - if (likely(pgd != NULL)) { - memset(pgd, 0, PAGE_SIZE<<PGD_ALLOC_ORDER); -#ifdef CONFIG_64BIT - actual_pgd += PTRS_PER_PGD; - /* Populate first pmd with allocated memory. We mark it - * with PxD_FLAG_ATTACHED as a signal to the system that this - * pmd entry may not be cleared. */ - __pgd_val_set(*actual_pgd, (PxD_FLAG_PRESENT | - PxD_FLAG_VALID | - PxD_FLAG_ATTACHED) - + (__u32)(__pa((unsigned long)pgd) >> PxD_VALUE_SHIFT)); - /* The first pmd entry also is marked with _PAGE_GATEWAY as - * a signal that this pmd may not be freed */ - __pgd_val_set(*pgd, PxD_FLAG_ATTACHED); -#endif - } - return actual_pgd; -} - -static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) -{ -#ifdef CONFIG_64BIT - pgd -= PTRS_PER_PGD; -#endif - free_pages((unsigned long)pgd, PGD_ALLOC_ORDER); -} - -#if PT_NLEVELS == 3 - -/* Three Level Page Table Support for pmd's */ - -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) -{ - __pgd_val_set(*pgd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID) + - (__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT)); -} - -static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) -{ - pmd_t *pmd = (pmd_t *)__get_free_pages(GFP_KERNEL|__GFP_REPEAT, - PMD_ORDER); - if (pmd) - memset(pmd, 0, PAGE_SIZE<<PMD_ORDER); - return pmd; -} - -static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) -{ -#ifdef CONFIG_64BIT - if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED) - /* This is the permanent pmd attached to the pgd; - * cannot free it */ - return; -#endif - free_pages((unsigned long)pmd, PMD_ORDER); -} - -#else - -/* Two Level Page Table Support for pmd's */ - -/* - * allocating and freeing a pmd is trivial: the 1-entry pmd is - * inside the pgd, so has no extra memory associated with it. - */ - -#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) -#define pmd_free(mm, x) do { } while (0) -#define pgd_populate(mm, pmd, pte) BUG() - -#endif - -static inline void -pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) -{ -#ifdef CONFIG_64BIT - /* preserve the gateway marker if this is the beginning of - * the permanent pmd */ - if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED) - __pmd_val_set(*pmd, (PxD_FLAG_PRESENT | - PxD_FLAG_VALID | - PxD_FLAG_ATTACHED) - + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)); - else -#endif - __pmd_val_set(*pmd, (PxD_FLAG_PRESENT | PxD_FLAG_VALID) - + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)); -} - -#define pmd_populate(mm, pmd, pte_page) \ - pmd_populate_kernel(mm, pmd, page_address(pte_page)) -#define pmd_pgtable(pmd) pmd_page(pmd) - -static inline pgtable_t -pte_alloc_one(struct mm_struct *mm, unsigned long address) -{ - struct page *page = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO); - if (page) - pgtable_page_ctor(page); - return page; -} - -static inline pte_t * -pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr) -{ - pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO); - return pte; -} - -static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) -{ - free_page((unsigned long)pte); -} - -static inline void pte_free(struct mm_struct *mm, struct page *pte) -{ - pgtable_page_dtor(pte); - pte_free_kernel(mm, page_address(pte)); -} - -#define check_pgt_cache() do { } while (0) - -#endif |