Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block

[sfrench/cifs-2.6.git] / include / asm-xtensa / pgtable.h

diff --git a/include/asm-xtensa/pgtable.h b/include/asm-xtensa/pgtable.h
index 987e3b802313561d837b7f43f1e53133db0d0656..e9fc512cc2473a3585d425713637807120ef5722 100644 (file)
--- a/include/asm-xtensa/pgtable.h
+++ b/include/asm-xtensa/pgtable.h
@@ -1,5 +1,5 @@
 /*
- * linux/include/asm-xtensa/page.h
+ * linux/include/asm-xtensa/pgtable.h
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version2 as
@@ -14,45 +14,6 @@
 #include <asm-generic/pgtable-nopmd.h>
 #include <asm/page.h>
 
-/* Assertions. */
-
-#ifdef CONFIG_MMU
-
-
-#if (XCHAL_MMU_RINGS < 2)
-# error Linux build assumes at least 2 ring levels.
-#endif
-
-#if (XCHAL_MMU_CA_BITS != 4)
-# error We assume exactly four bits for CA.
-#endif
-
-#if (XCHAL_MMU_SR_BITS != 0)
-# error We have no room for SR bits.
-#endif
-
-/*
- * Use the first min-wired way for mapping page-table pages.
- * Page coloring requires a second min-wired way.
- */
-
-#if (XCHAL_DTLB_MINWIRED_SETS == 0)
-# error Need a min-wired way for mapping page-table pages
-#endif
-
-#define DTLB_WAY_PGTABLE XCHAL_DTLB_SET(XCHAL_DTLB_MINWIRED_SET0, WAY)
-
-#if (DCACHE_WAY_SIZE > PAGE_SIZE) && XCHAL_DCACHE_IS_WRITEBACK
-# if XCHAL_DTLB_SET(XCHAL_DTLB_MINWIRED_SET0, WAYS) >= 2
-#  define DTLB_WAY_DCACHE_ALIAS0 (DTLB_WAY_PGTABLE + 1)
-#  define DTLB_WAY_DCACHE_ALIAS1 (DTLB_WAY_PGTABLE + 2)
-# else
-#  error Page coloring requires its own wired dtlb way!
-# endif
-#endif
-
-#endif /* CONFIG_MMU */
-
 /*
  * We only use two ring levels, user and kernel space.
  */
@@ -97,7 +58,7 @@
 #define PGD_ORDER              0
 #define PMD_ORDER              0
 #define USER_PTRS_PER_PGD      (TASK_SIZE/PGDIR_SIZE)
-#define FIRST_USER_ADDRESS      XCHAL_SEG_MAPPABLE_VADDR
+#define FIRST_USER_ADDRESS      0
 #define FIRST_USER_PGD_NR      (FIRST_USER_ADDRESS >> PGDIR_SHIFT)
 
 /* virtual memory area. We keep a distance to other memory regions to be
@@ -218,7 +179,7 @@ extern pgd_t swapper_pg_dir[PAGE_SIZE/sizeof(pgd_t)];
 /*
  * The pmd contains the kernel virtual address of the pte page.
  */
-#define pmd_page_kernel(pmd) ((unsigned long)(pmd_val(pmd) & PAGE_MASK))
+#define pmd_page_vaddr(pmd) ((unsigned long)(pmd_val(pmd) & PAGE_MASK))
 #define pmd_page(pmd) virt_to_page(pmd_val(pmd))
 
 /*
@@ -236,16 +197,13 @@ extern pgd_t swapper_pg_dir[PAGE_SIZE/sizeof(pgd_t)];
 
 /* Note: We use the _PAGE_USER bit to indicate write-protect kernel memory */
 
-static inline int pte_read(pte_t pte)  { return pte_val(pte) & _PAGE_USER; }
 static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; }
 static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
 static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
 static inline int pte_file(pte_t pte)  { return pte_val(pte) & _PAGE_FILE; }
 static inline pte_t pte_wrprotect(pte_t pte)   { pte_val(pte) &= ~(_PAGE_RW | _PAGE_WRENABLE); return pte; }
-static inline pte_t pte_rdprotect(pte_t pte)   { pte_val(pte) &= ~_PAGE_USER; return pte; }
 static inline pte_t pte_mkclean(pte_t pte)     { pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
 static inline pte_t pte_mkold(pte_t pte)       { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkread(pte_t pte)      { pte_val(pte) |= _PAGE_USER; return pte; }
 static inline pte_t pte_mkdirty(pte_t pte)     { pte_val(pte) |= _PAGE_DIRTY; return pte; }
 static inline pte_t pte_mkyoung(pte_t pte)     { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
 static inline pte_t pte_mkwrite(pte_t pte)     { pte_val(pte) |= _PAGE_RW; return pte; }
@@ -278,6 +236,8 @@ static inline void update_pte(pte_t *ptep, pte_t pteval)
 #endif
 }
 
+struct mm_struct;
+
 static inline void
 set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pteval)
 {
@@ -294,6 +254,7 @@ set_pmd(pmd_t *pmdp, pmd_t pmdval)
 #endif
 }
 
+struct vm_area_struct;
 
 static inline int
 ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr,
@@ -346,7 +307,7 @@ ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 /* Find an entry in the third-level page table.. */
 #define pte_index(address)     (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
 #define pte_offset_kernel(dir,addr)                                    \
-       ((pte_t*) pmd_page_kernel(*(dir)) + pte_index(addr))
+       ((pte_t*) pmd_page_vaddr(*(dir)) + pte_index(addr))
 #define pte_offset_map(dir,addr)       pte_offset_kernel((dir),(addr))
 #define pte_offset_map_nested(dir,addr)        pte_offset_kernel((dir),(addr))