diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/hexagon/include/asm/pgalloc.h')
-rw-r--r-- | ANDROID_3.4.5/arch/hexagon/include/asm/pgalloc.h | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/ANDROID_3.4.5/arch/hexagon/include/asm/pgalloc.h b/ANDROID_3.4.5/arch/hexagon/include/asm/pgalloc.h deleted file mode 100644 index 13443c77..00000000 --- a/ANDROID_3.4.5/arch/hexagon/include/asm/pgalloc.h +++ /dev/null @@ -1,146 +0,0 @@ -/* - * Page table support for the Hexagon architecture - * - * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#ifndef _ASM_PGALLOC_H -#define _ASM_PGALLOC_H - -#include <asm/mem-layout.h> -#include <asm/atomic.h> - -#define check_pgt_cache() do {} while (0) - -extern unsigned long long kmap_generation; - -/* - * Page table creation interface - */ -static inline pgd_t *pgd_alloc(struct mm_struct *mm) -{ - pgd_t *pgd; - - pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO); - - /* - * There may be better ways to do this, but to ensure - * that new address spaces always contain the kernel - * base mapping, and to ensure that the user area is - * initially marked invalid, initialize the new map - * map with a copy of the kernel's persistent map. - */ - - memcpy(pgd, swapper_pg_dir, PTRS_PER_PGD*sizeof(pgd_t *)); - mm->context.generation = kmap_generation; - - /* Physical version is what is passed to virtual machine on switch */ - mm->context.ptbase = __pa(pgd); - - return pgd; -} - -static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) -{ - free_page((unsigned long) pgd); -} - -static inline struct page *pte_alloc_one(struct mm_struct *mm, - unsigned long address) -{ - struct page *pte; - - pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); - - if (pte) - pgtable_page_ctor(pte); - - return pte; -} - -/* _kernel variant gets to use a different allocator */ -static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, - unsigned long address) -{ - gfp_t flags = GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO; - return (pte_t *) __get_free_page(flags); -} - -static inline void pte_free(struct mm_struct *mm, struct page *pte) -{ - pgtable_page_dtor(pte); - __free_page(pte); -} - -static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) -{ - free_page((unsigned long)pte); -} - -static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, - pgtable_t pte) -{ - /* - * Conveniently, zero in 3 LSB means indirect 4K page table. - * Not so convenient when you're trying to vary the page size. - */ - set_pmd(pmd, __pmd(((unsigned long)page_to_pfn(pte) << PAGE_SHIFT) | - HEXAGON_L1_PTE_SIZE)); -} - -/* - * Other architectures seem to have ways of making all processes - * share the same pmd's for their kernel mappings, but the v0.3 - * Hexagon VM spec has a "monolithic" L1 table for user and kernel - * segments. We track "generations" of the kernel map to minimize - * overhead, and update the "slave" copies of the kernel mappings - * as part of switch_mm. However, we still need to update the - * kernel map of the active thread who's calling pmd_populate_kernel... - */ -static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, - pte_t *pte) -{ - extern spinlock_t kmap_gen_lock; - pmd_t *ppmd; - int pmdindex; - - spin_lock(&kmap_gen_lock); - kmap_generation++; - mm->context.generation = kmap_generation; - current->active_mm->context.generation = kmap_generation; - spin_unlock(&kmap_gen_lock); - - set_pmd(pmd, __pmd(((unsigned long)__pa(pte)) | HEXAGON_L1_PTE_SIZE)); - - /* - * Now the "slave" copy of the current thread. - * This is pointer arithmetic, not byte addresses! - */ - pmdindex = (pgd_t *)pmd - mm->pgd; - ppmd = (pmd_t *)current->active_mm->pgd + pmdindex; - set_pmd(ppmd, __pmd(((unsigned long)__pa(pte)) | HEXAGON_L1_PTE_SIZE)); - if (pmdindex > max_kernel_seg) - max_kernel_seg = pmdindex; -} - -#define __pte_free_tlb(tlb, pte, addr) \ -do { \ - pgtable_page_dtor((pte)); \ - tlb_remove_page((tlb), (pte)); \ -} while (0) - -#endif |