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Diffstat (limited to 'include/asm-s390/pgalloc.h')
| -rw-r--r-- | include/asm-s390/pgalloc.h | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h deleted file mode 100644 index e45d3c9a4b7..00000000000 --- a/include/asm-s390/pgalloc.h +++ /dev/null @@ -1,237 +0,0 @@ -/* - * include/asm-s390/pgalloc.h - * - * S390 version - * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Hartmut Penner (hp@de.ibm.com) - * Martin Schwidefsky (schwidefsky@de.ibm.com) - * - * Derived from "include/asm-i386/pgalloc.h" - * Copyright (C) 1994 Linus Torvalds - */ - -#ifndef _S390_PGALLOC_H -#define _S390_PGALLOC_H - -#include <linux/threads.h> -#include <linux/gfp.h> -#include <linux/mm.h> - -#define check_pgt_cache() do {} while (0) - -/* - * Page allocation orders. - */ -#ifndef __s390x__ -# define PTE_ALLOC_ORDER 0 -# define PMD_ALLOC_ORDER 0 -# define PGD_ALLOC_ORDER 1 -#else /* __s390x__ */ -# define PTE_ALLOC_ORDER 0 -# define PMD_ALLOC_ORDER 2 -# define PGD_ALLOC_ORDER 2 -#endif /* __s390x__ */ - -/* - * Allocate and free page tables. The xxx_kernel() versions are - * used to allocate a kernel page table - this turns on ASN bits - * if any. - */ - -static inline pgd_t *pgd_alloc(struct mm_struct *mm) -{ - pgd_t *pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ALLOC_ORDER); - int i; - - if (!pgd) - return NULL; - if (s390_noexec) { - pgd_t *shadow_pgd = (pgd_t *) - __get_free_pages(GFP_KERNEL, PGD_ALLOC_ORDER); - struct page *page = virt_to_page(pgd); - - if (!shadow_pgd) { - free_pages((unsigned long) pgd, PGD_ALLOC_ORDER); - return NULL; - } - page->lru.next = (void *) shadow_pgd; - } - for (i = 0; i < PTRS_PER_PGD; i++) -#ifndef __s390x__ - pmd_clear(pmd_offset(pgd + i, i*PGDIR_SIZE)); -#else - pgd_clear(pgd + i); -#endif - return pgd; -} - -static inline void pgd_free(pgd_t *pgd) -{ - pgd_t *shadow_pgd = get_shadow_pgd(pgd); - - if (shadow_pgd) - free_pages((unsigned long) shadow_pgd, PGD_ALLOC_ORDER); - free_pages((unsigned long) pgd, PGD_ALLOC_ORDER); -} - -#ifndef __s390x__ -/* - * page middle directory allocation/free routines. - * We use pmd cache only on s390x, so these are dummy routines. This - * code never triggers because the pgd will always be present. - */ -#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) -#define pmd_free(x) do { } while (0) -#define __pmd_free_tlb(tlb,x) do { } while (0) -#define pgd_populate(mm, pmd, pte) BUG() -#define pgd_populate_kernel(mm, pmd, pte) BUG() -#else /* __s390x__ */ -static inline pmd_t * pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr) -{ - pmd_t *pmd = (pmd_t *) __get_free_pages(GFP_KERNEL, PMD_ALLOC_ORDER); - int i; - - if (!pmd) - return NULL; - if (s390_noexec) { - pmd_t *shadow_pmd = (pmd_t *) - __get_free_pages(GFP_KERNEL, PMD_ALLOC_ORDER); - struct page *page = virt_to_page(pmd); - - if (!shadow_pmd) { - free_pages((unsigned long) pmd, PMD_ALLOC_ORDER); - return NULL; - } - page->lru.next = (void *) shadow_pmd; - } - for (i=0; i < PTRS_PER_PMD; i++) - pmd_clear(pmd + i); - return pmd; -} - -static inline void pmd_free (pmd_t *pmd) -{ - pmd_t *shadow_pmd = get_shadow_pmd(pmd); - - if (shadow_pmd) - free_pages((unsigned long) shadow_pmd, PMD_ALLOC_ORDER); - free_pages((unsigned long) pmd, PMD_ALLOC_ORDER); -} - -#define __pmd_free_tlb(tlb,pmd) \ - do { \ - tlb_flush_mmu(tlb, 0, 0); \ - pmd_free(pmd); \ - } while (0) - -static inline void -pgd_populate_kernel(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) -{ - pgd_val(*pgd) = _PGD_ENTRY | __pa(pmd); -} - -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd) -{ - pgd_t *shadow_pgd = get_shadow_pgd(pgd); - pmd_t *shadow_pmd = get_shadow_pmd(pmd); - - if (shadow_pgd && shadow_pmd) - pgd_populate_kernel(mm, shadow_pgd, shadow_pmd); - pgd_populate_kernel(mm, pgd, pmd); -} - -#endif /* __s390x__ */ - -static inline void -pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) -{ -#ifndef __s390x__ - pmd_val(pmd[0]) = _PAGE_TABLE + __pa(pte); - pmd_val(pmd[1]) = _PAGE_TABLE + __pa(pte+256); - pmd_val(pmd[2]) = _PAGE_TABLE + __pa(pte+512); - pmd_val(pmd[3]) = _PAGE_TABLE + __pa(pte+768); -#else /* __s390x__ */ - pmd_val(*pmd) = _PMD_ENTRY + __pa(pte); - pmd_val1(*pmd) = _PMD_ENTRY + __pa(pte+256); -#endif /* __s390x__ */ -} - -static inline void -pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page) -{ - pte_t *pte = (pte_t *)page_to_phys(page); - pmd_t *shadow_pmd = get_shadow_pmd(pmd); - pte_t *shadow_pte = get_shadow_pte(pte); - - pmd_populate_kernel(mm, pmd, pte); - if (shadow_pmd && shadow_pte) - pmd_populate_kernel(mm, shadow_pmd, shadow_pte); -} - -/* - * page table entry allocation/free routines. - */ -static inline pte_t * -pte_alloc_one_kernel(struct mm_struct *mm, unsigned long vmaddr) -{ - pte_t *pte = (pte_t *) __get_free_page(GFP_KERNEL|__GFP_REPEAT); - int i; - - if (!pte) - return NULL; - if (s390_noexec) { - pte_t *shadow_pte = (pte_t *) - __get_free_page(GFP_KERNEL|__GFP_REPEAT); - struct page *page = virt_to_page(pte); - - if (!shadow_pte) { - free_page((unsigned long) pte); - return NULL; - } - page->lru.next = (void *) shadow_pte; - } - for (i=0; i < PTRS_PER_PTE; i++) { - pte_clear(mm, vmaddr, pte + i); - vmaddr += PAGE_SIZE; - } - return pte; -} - -static inline struct page * -pte_alloc_one(struct mm_struct *mm, unsigned long vmaddr) -{ - pte_t *pte = pte_alloc_one_kernel(mm, vmaddr); - if (pte) - return virt_to_page(pte); - return NULL; -} - -static inline void pte_free_kernel(pte_t *pte) -{ - pte_t *shadow_pte = get_shadow_pte(pte); - - if (shadow_pte) - free_page((unsigned long) shadow_pte); - free_page((unsigned long) pte); -} - -static inline void pte_free(struct page *pte) -{ - struct page *shadow_page = get_shadow_page(pte); - - if (shadow_page) - __free_page(shadow_page); - __free_page(pte); -} - -#define __pte_free_tlb(tlb, pte) \ -({ \ - struct mmu_gather *__tlb = (tlb); \ - struct page *__pte = (pte); \ - struct page *shadow_page = get_shadow_page(__pte); \ - if (shadow_page) \ - tlb_remove_page(__tlb, shadow_page); \ - tlb_remove_page(__tlb, __pte); \ -}) - -#endif /* _S390_PGALLOC_H */ |