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Diffstat (limited to 'include/asm-xtensa/pgalloc.h')
| -rw-r--r-- | include/asm-xtensa/pgalloc.h | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/include/asm-xtensa/pgalloc.h b/include/asm-xtensa/pgalloc.h deleted file mode 100644 index 734a8d06039..00000000000 --- a/include/asm-xtensa/pgalloc.h +++ /dev/null @@ -1,116 +0,0 @@ -/* - * linux/include/asm-xtensa/pgalloc.h - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Copyright (C) 2001-2005 Tensilica Inc. - */ - -#ifndef _XTENSA_PGALLOC_H -#define _XTENSA_PGALLOC_H - -#ifdef __KERNEL__ - -#include <linux/config.h> -#include <linux/threads.h> -#include <linux/highmem.h> -#include <asm/processor.h> -#include <asm/cacheflush.h> - - -/* Cache aliasing: - * - * If the cache size for one way is greater than the page size, we have to - * deal with cache aliasing. The cache index is wider than the page size: - * - * |cache | - * |pgnum |page| virtual address - * |xxxxxX|zzzz| - * | | | - * \ / | | - * trans.| | - * / \ | | - * |yyyyyY|zzzz| physical address - * - * When the page number is translated to the physical page address, the lowest - * bit(s) (X) that are also part of the cache index are also translated (Y). - * If this translation changes this bit (X), the cache index is also afected, - * thus resulting in a different cache line than before. - * The kernel does not provide a mechanism to ensure that the page color - * (represented by this bit) remains the same when allocated or when pages - * are remapped. When user pages are mapped into kernel space, the color of - * the page might also change. - * - * We use the address space VMALLOC_END ... VMALLOC_END + DCACHE_WAY_SIZE * 2 - * to temporarily map a patch so we can match the color. - */ - -#if (DCACHE_WAY_SIZE > PAGE_SIZE) -# define PAGE_COLOR_MASK (PAGE_MASK & (DCACHE_WAY_SIZE-1)) -# define PAGE_COLOR(a) \ - (((unsigned long)(a)&PAGE_COLOR_MASK) >> PAGE_SHIFT) -# define PAGE_COLOR_EQ(a,b) \ - ((((unsigned long)(a) ^ (unsigned long)(b)) & PAGE_COLOR_MASK) == 0) -# define PAGE_COLOR_MAP0(v) \ - (VMALLOC_END + ((unsigned long)(v) & PAGE_COLOR_MASK)) -# define PAGE_COLOR_MAP1(v) \ - (VMALLOC_END + ((unsigned long)(v) & PAGE_COLOR_MASK) + DCACHE_WAY_SIZE) -#endif - -/* - * Allocating and freeing a pmd is trivial: the 1-entry pmd is - * inside the pgd, so has no extra memory associated with it. - */ - -#define pgd_free(pgd) free_page((unsigned long)(pgd)) - -#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK - -static inline void -pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *pte) -{ - pmd_val(*(pmdp)) = (unsigned long)(pte); - __asm__ __volatile__ ("memw; dhwb %0, 0; dsync" :: "a" (pmdp)); -} - -static inline void -pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *page) -{ - pmd_val(*(pmdp)) = (unsigned long)page_to_virt(page); - __asm__ __volatile__ ("memw; dhwb %0, 0; dsync" :: "a" (pmdp)); -} - - - -#else - -# define pmd_populate_kernel(mm, pmdp, pte) \ - (pmd_val(*(pmdp)) = (unsigned long)(pte)) -# define pmd_populate(mm, pmdp, page) \ - (pmd_val(*(pmdp)) = (unsigned long)page_to_virt(page)) - -#endif - -static inline pgd_t* -pgd_alloc(struct mm_struct *mm) -{ - pgd_t *pgd; - - pgd = (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, PGD_ORDER); - - if (likely(pgd != NULL)) - __flush_dcache_page((unsigned long)pgd); - - return pgd; -} - -extern pte_t* pte_alloc_one_kernel(struct mm_struct* mm, unsigned long addr); -extern struct page* pte_alloc_one(struct mm_struct* mm, unsigned long addr); - -#define pte_free_kernel(pte) free_page((unsigned long)pte) -#define pte_free(pte) __free_page(pte) - -#endif /* __KERNEL__ */ -#endif /* _XTENSA_PGALLOC_H */ |
