X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-mips%2Fpgtable-64.h;h=a5b18710b6a4a30f0238d07d275ac19d109c40c9;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=82166b254b2704d649dc27f1acb725ba07dadf38;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/include/asm-mips/pgtable-64.h b/include/asm-mips/pgtable-64.h
index 82166b254..a5b18710b 100644
--- 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 */