fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / include / asm-mips / pgtable-64.h

diff --git a/include/asm-mips/pgtable-64.h b/include/asm-mips/pgtable-64.h
index 82166b2..a5b1871 100644 (file)
--- a/include/asm-mips/pgtable-64.h
+++ b/include/asm-mips/pgtable-64.h
@@ -9,12 +9,12 @@
 #ifndef _ASM_PGTABLE_64_H
 #define _ASM_PGTABLE_64_H
 
-#include <linux/config.h>
 #include <linux/linkage.h>
 
 #include <asm/addrspace.h>
 #include <asm/page.h>
 #include <asm/cachectl.h>
+#include <asm/fixmap.h>
 
 #include <asm-generic/pgtable-nopud.h>
 
@@ -94,12 +94,23 @@
 #define PTRS_PER_PMD   ((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t))
 #define PTRS_PER_PTE   ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
 
+#if PGDIR_SIZE >= TASK_SIZE
+#define USER_PTRS_PER_PGD       (1)
+#else
 #define USER_PTRS_PER_PGD      (TASK_SIZE / PGDIR_SIZE)
-#define FIRST_USER_ADDRESS     0
+#endif
+#define FIRST_USER_ADDRESS     0UL
 
 #define VMALLOC_START          MAP_BASE
 #define VMALLOC_END    \
        (VMALLOC_START + PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE)
+#if defined(CONFIG_MODULES) && !defined(CONFIG_BUILD_ELF64) && \
+       VMALLOC_START != CKSSEG
+/* Load modules into 32bit-compatible segment. */
+#define MODULE_START   CKSSEG
+#define MODULE_END     (FIXADDR_START-2*PAGE_SIZE)
+extern pgd_t module_pg_dir[PTRS_PER_PGD];
+#endif
 
 #define pte_ERROR(e) \
        printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
@@ -171,7 +182,12 @@ static inline void pud_clear(pud_t *pudp)
 #define __pmd_offset(address)  pmd_index(address)
 
 /* to find an entry in a kernel page-table-directory */
-#define pgd_offset_k(address) pgd_offset(&init_mm, 0)
+#ifdef MODULE_START
+#define pgd_offset_k(address) \
+       ((address) >= MODULE_START ? module_pg_dir : pgd_offset(&init_mm, 0UL))
+#else
+#define pgd_offset_k(address) pgd_offset(&init_mm, 0UL)
+#endif
 
 #define pgd_index(address)     (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
 #define pmd_index(address)     (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
@@ -179,24 +195,26 @@ static inline void pud_clear(pud_t *pudp)
 /* to find an entry in a page-table-directory */
 #define pgd_offset(mm,addr)    ((mm)->pgd + pgd_index(addr))
 
-static inline unsigned long pud_page(pud_t pud)
+static inline unsigned long pud_page_vaddr(pud_t pud)
 {
        return pud_val(pud);
 }
+#define pud_phys(pud)          (pud_val(pud) - PAGE_OFFSET)
+#define pud_page(pud)          (pfn_to_page(pud_phys(pud) >> PAGE_SHIFT))
 
 /* Find an entry in the second-level page table.. */
 static inline pmd_t *pmd_offset(pud_t * pud, unsigned long address)
 {
-       return (pmd_t *) pud_page(*pud) + pmd_index(address);
+       return (pmd_t *) pud_page_vaddr(*pud) + pmd_index(address);
 }
 
 /* Find an entry in the third-level page table.. */
 #define __pte_offset(address)                                          \
        (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
 #define pte_offset(dir, address)                                       \
-       ((pte_t *) (pmd_page_kernel(*dir)) + __pte_offset(address))
+       ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
 #define pte_offset_kernel(dir, address)                                        \
-       ((pte_t *) pmd_page_kernel(*(dir)) +  __pte_offset(address))
+       ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
 #define pte_offset_map(dir, address)                                   \
        ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
 #define pte_offset_map_nested(dir, address)                            \
@@ -224,15 +242,12 @@ static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
 #define __swp_entry_to_pte(x)  ((pte_t) { (x).val })
 
 /*
- * Bits 0, 1, 2, 7 and 8 are taken, split up the 32 bits of offset
- * into this range:
+ * Bits 0, 4, 6, and 7 are taken. Let's leave bits 1, 2, 3, and 5 alone to
+ * make things easier, and only use the upper 56 bits for the page offset...
  */
-#define PTE_FILE_MAX_BITS      32
-
-#define pte_to_pgoff(_pte) \
-       ((((_pte).pte >> 3) & 0x1f ) + (((_pte).pte >> 9) << 6 ))
+#define PTE_FILE_MAX_BITS      56
 
-#define pgoff_to_pte(off) \
-       ((pte_t) { (((off) & 0x1f) << 3) + (((off) >> 6) << 9) + _PAGE_FILE })
+#define pte_to_pgoff(_pte)     ((_pte).pte >> 8)
+#define pgoff_to_pte(off)      ((pte_t) { ((off) << 8) | _PAGE_FILE })
 
 #endif /* _ASM_PGTABLE_64_H */