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Diffstat (limited to 'arch/mips/include/asm/pgtable-64.h')
-rw-r--r--arch/mips/include/asm/pgtable-64.h81
1 files changed, 65 insertions, 16 deletions
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h
index 9cd50899395..e1c49a96807 100644
--- a/arch/mips/include/asm/pgtable-64.h
+++ b/arch/mips/include/asm/pgtable-64.h
@@ -9,6 +9,7 @@
#ifndef _ASM_PGTABLE_64_H
#define _ASM_PGTABLE_64_H
+#include <linux/compiler.h>
#include <linux/linkage.h>
#include <asm/addrspace.h>
@@ -16,7 +17,11 @@
#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 +42,20 @@
* 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))
@@ -92,25 +104,34 @@
#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
-#define USER_PTRS_PER_PGD (1)
+#if PGDIR_SIZE >= TASK_SIZE64
+#define USER_PTRS_PER_PGD (1)
#else
-#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
+#define USER_PTRS_PER_PGD (TASK_SIZE64 / PGDIR_SIZE)
#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 + \
- PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE - (1UL << 32))
+ (MAP_BASE + \
+ min(PTRS_PER_PGD * PTRS_PER_PMD * PTRS_PER_PTE * PAGE_SIZE, \
+ (1UL << cpu_vmbits)) - (1UL << 32))
+
#if defined(CONFIG_MODULES) && defined(KBUILD_64BIT_SYM32) && \
VMALLOC_START != CKSSEG
/* Load modules into 32bit-compatible segment. */
@@ -120,15 +141,29 @@
#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.
@@ -138,7 +173,19 @@ static inline int pmd_none(pmd_t pmd)
return pmd_val(pmd) == (unsigned long) invalid_pte_table;
}
-#define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
+static inline int pmd_bad(pmd_t pmd)
+{
+#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
+ /* pmd_huge(pmd) but inline */
+ if (unlikely(pmd_val(pmd) & _PAGE_HUGE))
+ return 0;
+#endif
+
+ if (unlikely(pmd_val(pmd) & ~PAGE_MASK))
+ return 1;
+
+ return 0;
+}
static inline int pmd_present(pmd_t pmd)
{
@@ -149,6 +196,7 @@ 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.
@@ -172,6 +220,7 @@ 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))
@@ -179,8 +228,9 @@ 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))
+#define pfn_pmd(pfn, prot) __pmd(((pfn) << _PFN_SHIFT) | pgprot_val(prot))
#endif
#define __pgd_offset(address) pgd_index(address)
@@ -196,6 +246,7 @@ 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);
@@ -208,6 +259,7 @@ 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) \
@@ -218,10 +270,7 @@ static inline pmd_t *pmd_offset(pud_t * pud, unsigned long 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) \
- ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
#define pte_unmap(pte) ((void)(pte))
-#define pte_unmap_nested(pte) ((void)(pte))
/*
* Initialize a new pgd / pmd table with invalid pointers.
@@ -239,7 +288,7 @@ static inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
#define __swp_type(x) (((x).val >> 32) & 0xff)
#define __swp_offset(x) ((x).val >> 40)
#define __swp_entry(type, offset) ((swp_entry_t) { pte_val(mk_swap_pte((type), (offset))) })
-#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
+#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
/*
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 10:59:37 +0000