Merge branch 'omap-boards' into omap-for-linus

[pandora-kernel.git] / arch / mips / include / asm / pgtable-64.h

diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index 8eda30b..1be4b0f 100644 (file)
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -16,7 +16,11 @@
 #include <asm/cachectl.h>
 #include <asm/fixmap.h>
 
+#ifdef CONFIG_PAGE_SIZE_64KB
+#include <asm-generic/pgtable-nopmd.h>
+#else
 #include <asm-generic/pgtable-nopud.h>
+#endif
 
 /*
  * Each address space has 2 4K pages as its page directory, giving 1024
@@ -37,13 +41,20 @@
  * fault address - VMALLOC_START.
  */
 
+
+/* PGDIR_SHIFT determines what a third-level page table entry can map */
+#ifdef __PAGETABLE_PMD_FOLDED
+#define PGDIR_SHIFT    (PAGE_SHIFT + PAGE_SHIFT + PTE_ORDER - 3)
+#else
+
 /* PMD_SHIFT determines the size of the area a second-level page table can map */
 #define PMD_SHIFT      (PAGE_SHIFT + (PAGE_SHIFT + PTE_ORDER - 3))
 #define PMD_SIZE       (1UL << PMD_SHIFT)
 #define PMD_MASK       (~(PMD_SIZE-1))
 
-/* PGDIR_SHIFT determines what a third-level page table entry can map */
+
 #define PGDIR_SHIFT    (PMD_SHIFT + (PAGE_SHIFT + PMD_ORDER - 3))
+#endif
 #define PGDIR_SIZE     (1UL << PGDIR_SHIFT)
 #define PGDIR_MASK     (~(PGDIR_SIZE-1))
 
@@ -92,12 +103,14 @@
 #ifdef CONFIG_PAGE_SIZE_64KB
 #define PGD_ORDER              0
 #define PUD_ORDER              aieeee_attempt_to_allocate_pud
-#define PMD_ORDER              0
+#define PMD_ORDER              aieeee_attempt_to_allocate_pmd
 #define PTE_ORDER              0
 #endif
 
 #define PTRS_PER_PGD   ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))
+#ifndef __PAGETABLE_PMD_FOLDED
 #define PTRS_PER_PMD   ((PAGE_SIZE << PMD_ORDER) / sizeof(pmd_t))
+#endif
 #define PTRS_PER_PTE   ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
 
 #if PGDIR_SIZE >= TASK_SIZE
@@ -107,9 +120,14 @@
 #endif
 #define FIRST_USER_ADDRESS     0UL
 
-#define VMALLOC_START          MAP_BASE
+/*
+ * TLB refill handlers also map the vmalloc area into xuseg.  Avoid
+ * the first couple of pages so NULL pointer dereferences will still
+ * reliably trap.
+ */
+#define VMALLOC_START          (MAP_BASE + (2 * PAGE_SIZE))
 #define VMALLOC_END    \
-       (VMALLOC_START + \
+       (MAP_BASE + \
         min(PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \
             (1UL << cpu_vmbits)) - (1UL << 32))
 
@@ -122,15 +140,30 @@
 
 #define pte_ERROR(e) \
        printk("%s:%d: bad pte %016lx.\n", __FILE__, __LINE__, pte_val(e))
+#ifndef __PAGETABLE_PMD_FOLDED
 #define pmd_ERROR(e) \
        printk("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
+#endif
 #define pgd_ERROR(e) \
        printk("%s:%d: bad pgd %016lx.\n", __FILE__, __LINE__, pgd_val(e))
 
 extern pte_t invalid_pte_table[PTRS_PER_PTE];
 extern pte_t empty_bad_page_table[PTRS_PER_PTE];
+
+
+#ifndef __PAGETABLE_PMD_FOLDED
+/*
+ * For 3-level pagetables we defines these ourselves, for 2-level the
+ * definitions are supplied by <asm-generic/pgtable-nopmd.h>.
+ */
+typedef struct { unsigned long pmd; } pmd_t;
+#define pmd_val(x)     ((x).pmd)
+#define __pmd(x)       ((pmd_t) { (x) } )
+
+
 extern pmd_t invalid_pmd_table[PTRS_PER_PMD];
 extern pmd_t empty_bad_pmd_table[PTRS_PER_PMD];
+#endif
 
 /*
  * Empty pgd/pmd entries point to the invalid_pte_table.
@@ -151,6 +184,7 @@ static inline void pmd_clear(pmd_t *pmdp)
 {
        pmd_val(*pmdp) = ((unsigned long) invalid_pte_table);
 }
+#ifndef __PAGETABLE_PMD_FOLDED
 
 /*
  * Empty pud entries point to the invalid_pmd_table.
@@ -174,6 +208,7 @@ static inline void pud_clear(pud_t *pudp)
 {
        pud_val(*pudp) = ((unsigned long) invalid_pmd_table);
 }
+#endif
 
 #define pte_page(x)            pfn_to_page(pte_pfn(x))
 
@@ -181,8 +216,8 @@ static inline void pud_clear(pud_t *pudp)
 #define pte_pfn(x)             ((unsigned long)((x).pte >> (PAGE_SHIFT + 2)))
 #define pfn_pte(pfn, prot)     __pte(((pfn) << (PAGE_SHIFT + 2)) | pgprot_val(prot))
 #else
-#define pte_pfn(x)             ((unsigned long)((x).pte >> PAGE_SHIFT))
-#define pfn_pte(pfn, prot)     __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
+#define pte_pfn(x)             ((unsigned long)((x).pte >> _PFN_SHIFT))
+#define pfn_pte(pfn, prot)     __pte(((pfn) << _PFN_SHIFT) | pgprot_val(prot))
 #endif
 
 #define __pgd_offset(address)  pgd_index(address)
@@ -198,6 +233,7 @@ 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))
 
+#ifndef __PAGETABLE_PMD_FOLDED
 static inline unsigned long pud_page_vaddr(pud_t pud)
 {
        return pud_val(pud);
@@ -210,6 +246,7 @@ static inline pmd_t *pmd_offset(pud_t * pud, unsigned long address)
 {
        return (pmd_t *) pud_page_vaddr(*pud) + pmd_index(address);
 }
+#endif
 
 /* Find an entry in the third-level page table.. */
 #define __pte_offset(address)                                          \