--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2003 Ralf Baechle
+ */
+#ifndef _ASM_PGTABLE_H
+#define _ASM_PGTABLE_H
+
+#include <linux/mm_types.h>
+#include <linux/mmzone.h>
+#ifdef CONFIG_32BIT
+#include <asm/pgtable-32.h>
+#endif
+#ifdef CONFIG_64BIT
+#include <asm/pgtable-64.h>
+#endif
+
+#include <asm/io.h>
+#include <asm/pgtable-bits.h>
+
+struct mm_struct;
+struct vm_area_struct;
+
+#define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT)
+#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | \
+ _page_cachable_default)
+#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_NO_EXEC | \
+ _page_cachable_default)
+#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | \
+ _page_cachable_default)
+#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
+ _PAGE_GLOBAL | _page_cachable_default)
+#define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
+ _PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT)
+#define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
+ _page_cachable_default)
+#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
+ __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED)
+
+/*
+ * If _PAGE_NO_EXEC is not defined, we can't do page protection for
+ * execute, and consider it to be the same as read. Also, write
+ * permissions imply read permissions. This is the closest we can get
+ * by reasonable means..
+ */
+
+/*
+ * Dummy values to fill the table in mmap.c
+ * The real values will be generated at runtime
+ */
+#define __P000 __pgprot(0)
+#define __P001 __pgprot(0)
+#define __P010 __pgprot(0)
+#define __P011 __pgprot(0)
+#define __P100 __pgprot(0)
+#define __P101 __pgprot(0)
+#define __P110 __pgprot(0)
+#define __P111 __pgprot(0)
+
+#define __S000 __pgprot(0)
+#define __S001 __pgprot(0)
+#define __S010 __pgprot(0)
+#define __S011 __pgprot(0)
+#define __S100 __pgprot(0)
+#define __S101 __pgprot(0)
+#define __S110 __pgprot(0)
+#define __S111 __pgprot(0)
+
+extern unsigned long _page_cachable_default;
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero; used
+ * for zero-mapped memory areas etc..
+ */
+
+extern unsigned long empty_zero_page;
+extern unsigned long zero_page_mask;
+
+#define ZERO_PAGE(vaddr) \
+ (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask))))
+#define __HAVE_COLOR_ZERO_PAGE
+
+extern void paging_init(void);
+
+/*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+#define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd))
+
+#define __pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
+#ifndef CONFIG_TRANSPARENT_HUGEPAGE
+#define pmd_page(pmd) __pmd_page(pmd)
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
+#define pmd_page_vaddr(pmd) pmd_val(pmd)
+
+#define htw_stop() \
+do { \
+ unsigned long flags; \
+ \
+ if (cpu_has_htw) { \
+ local_irq_save(flags); \
+ if(!raw_current_cpu_data.htw_seq++) { \
+ write_c0_pwctl(read_c0_pwctl() & \
+ ~(1 << MIPS_PWCTL_PWEN_SHIFT)); \
+ back_to_back_c0_hazard(); \
+ } \
+ local_irq_restore(flags); \
+ } \
+} while(0)
+
+#define htw_start() \
+do { \
+ unsigned long flags; \
+ \
+ if (cpu_has_htw) { \
+ local_irq_save(flags); \
+ if (!--raw_current_cpu_data.htw_seq) { \
+ write_c0_pwctl(read_c0_pwctl() | \
+ (1 << MIPS_PWCTL_PWEN_SHIFT)); \
+ back_to_back_c0_hazard(); \
+ } \
+ local_irq_restore(flags); \
+ } \
+} while(0)
+
+#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
+
+#define pte_none(pte) (!(((pte).pte_high) & ~_PAGE_GLOBAL))
+#define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT)
+
+static inline void set_pte(pte_t *ptep, pte_t pte)
+{
+ ptep->pte_high = pte.pte_high;
+ smp_wmb();
+ ptep->pte_low = pte.pte_low;
+
+ if (pte.pte_high & _PAGE_GLOBAL) {
+ pte_t *buddy = ptep_buddy(ptep);
+ /*
+ * Make sure the buddy is global too (if it's !none,
+ * it better already be global)
+ */
+ if (pte_none(*buddy))
+ buddy->pte_high |= _PAGE_GLOBAL;
+ }
+}
+#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
+
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+ pte_t null = __pte(0);
+
+ htw_stop();
+ /* Preserve global status for the pair */
+ if (ptep_buddy(ptep)->pte_high & _PAGE_GLOBAL)
+ null.pte_high = _PAGE_GLOBAL;
+
+ set_pte_at(mm, addr, ptep, null);
+ htw_start();
+}
+#else
+
+#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
+#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
+
+/*
+ * Certain architectures need to do special things when pte's
+ * within a page table are directly modified. Thus, the following
+ * hook is made available.
+ */
+static inline void set_pte(pte_t *ptep, pte_t pteval)
+{
+ *ptep = pteval;
+#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
+ if (pte_val(pteval) & _PAGE_GLOBAL) {
+ pte_t *buddy = ptep_buddy(ptep);
+ /*
+ * Make sure the buddy is global too (if it's !none,
+ * it better already be global)
+ */
+ if (pte_none(*buddy))
+ pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL;
+ }
+#endif
+}
+#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
+
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+ htw_stop();
+#if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX)
+ /* Preserve global status for the pair */
+ if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL)
+ set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL));
+ else
+#endif
+ set_pte_at(mm, addr, ptep, __pte(0));
+ htw_start();
+}
+#endif
+
+/*
+ * (pmds are folded into puds so this doesn't get actually called,
+ * but the define is needed for a generic inline function.)
+ */
+#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
+
+#ifndef __PAGETABLE_PMD_FOLDED
+/*
+ * (puds are folded into pgds so this doesn't get actually called,
+ * but the define is needed for a generic inline function.)
+ */
+#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
+#endif
+
+#define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1)
+#define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1)
+#define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1)
+
+/*
+ * We used to declare this array with size but gcc 3.3 and older are not able
+ * to find that this expression is a constant, so the size is dropped.
+ */
+extern pgd_t swapper_pg_dir[];
+
+/*
+ * The following only work if pte_present() is true.
+ * Undefined behaviour if not..
+ */
+#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
+static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; }
+static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; }
+static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; }
+
+static inline pte_t pte_wrprotect(pte_t pte)
+{
+ pte.pte_low &= ~_PAGE_WRITE;
+ pte.pte_high &= ~_PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_mkclean(pte_t pte)
+{
+ pte.pte_low &= ~_PAGE_MODIFIED;
+ pte.pte_high &= ~_PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_mkold(pte_t pte)
+{
+ pte.pte_low &= ~_PAGE_ACCESSED;
+ pte.pte_high &= ~_PAGE_SILENT_READ;
+ return pte;
+}
+
+static inline pte_t pte_mkwrite(pte_t pte)
+{
+ pte.pte_low |= _PAGE_WRITE;
+ if (pte.pte_low & _PAGE_MODIFIED)
+ pte.pte_high |= _PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_mkdirty(pte_t pte)
+{
+ pte.pte_low |= _PAGE_MODIFIED;
+ if (pte.pte_low & _PAGE_WRITE)
+ pte.pte_high |= _PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_mkyoung(pte_t pte)
+{
+ pte.pte_low |= _PAGE_ACCESSED;
+ if (pte.pte_low & _PAGE_READ)
+ pte.pte_high |= _PAGE_SILENT_READ;
+ return pte;
+}
+#else
+static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
+static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
+static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
+
+static inline pte_t pte_wrprotect(pte_t pte)
+{
+ pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
+ return pte;
+}
+
+static inline pte_t pte_mkclean(pte_t pte)
+{
+ pte_val(pte) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE);
+ return pte;
+}
+
+static inline pte_t pte_mkold(pte_t pte)
+{
+ pte_val(pte) &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ);
+ return pte;
+}
+
+static inline pte_t pte_mkwrite(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_WRITE;
+ if (pte_val(pte) & _PAGE_MODIFIED)
+ pte_val(pte) |= _PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_mkdirty(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_MODIFIED;
+ if (pte_val(pte) & _PAGE_WRITE)
+ pte_val(pte) |= _PAGE_SILENT_WRITE;
+ return pte;
+}
+
+static inline pte_t pte_mkyoung(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_ACCESSED;
+#ifdef CONFIG_CPU_MIPSR2
+ if (!(pte_val(pte) & _PAGE_NO_READ))
+ pte_val(pte) |= _PAGE_SILENT_READ;
+ else
+#endif
+ if (pte_val(pte) & _PAGE_READ)
+ pte_val(pte) |= _PAGE_SILENT_READ;
+ return pte;
+}
+
+#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
+static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; }
+
+static inline pte_t pte_mkhuge(pte_t pte)
+{
+ pte_val(pte) |= _PAGE_HUGE;
+ return pte;
+}
+#endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */
+#endif
+static inline int pte_special(pte_t pte) { return 0; }
+static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
+
+/*
+ * Macro to make mark a page protection value as "uncacheable". Note
+ * that "protection" is really a misnomer here as the protection value
+ * contains the memory attribute bits, dirty bits, and various other
+ * bits as well.
+ */
+#define pgprot_noncached pgprot_noncached
+
+static inline pgprot_t pgprot_noncached(pgprot_t _prot)
+{
+ unsigned long prot = pgprot_val(_prot);
+
+ prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
+
+ return __pgprot(prot);
+}
+
+static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
+{
+ unsigned long prot = pgprot_val(_prot);
+
+ /* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */
+ prot = (prot & ~_CACHE_MASK) | cpu_data[0].writecombine;
+
+ return __pgprot(prot);
+}
+
+/*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
+
+#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+ pte.pte_low &= (_PAGE_MODIFIED | _PAGE_ACCESSED | _PFNX_MASK);
+ pte.pte_high &= (_PFN_MASK | _CACHE_MASK);
+ pte.pte_low |= pgprot_val(newprot) & ~_PFNX_MASK;
+ pte.pte_high |= pgprot_val(newprot) & ~_PFN_MASK;
+ return pte;
+}
+#else
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+ return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
+}
+#endif
+
+
+extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
+ pte_t pte);
+extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
+ pte_t pte);
+
+static inline void update_mmu_cache(struct vm_area_struct *vma,
+ unsigned long address, pte_t *ptep)
+{
+ pte_t pte = *ptep;
+ __update_tlb(vma, address, pte);
+ __update_cache(vma, address, pte);
+}
+
+static inline void update_mmu_cache_pmd(struct vm_area_struct *vma,
+ unsigned long address, pmd_t *pmdp)
+{
+ pte_t pte = *(pte_t *)pmdp;
+
+ __update_tlb(vma, address, pte);
+}
+
+#define kern_addr_valid(addr) (1)
+
+#ifdef CONFIG_PHYS_ADDR_T_64BIT
+extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
+
+static inline int io_remap_pfn_range(struct vm_area_struct *vma,
+ unsigned long vaddr,
+ unsigned long pfn,
+ unsigned long size,
+ pgprot_t prot)
+{
+ phys_addr_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
+ return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
+}
+#define io_remap_pfn_range io_remap_pfn_range
+#endif
+
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+
+extern int has_transparent_hugepage(void);
+
+static inline int pmd_trans_huge(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & _PAGE_HUGE);
+}
+
+static inline pmd_t pmd_mkhuge(pmd_t pmd)
+{
+ pmd_val(pmd) |= _PAGE_HUGE;
+
+ return pmd;
+}
+
+static inline int pmd_trans_splitting(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & _PAGE_SPLITTING);
+}
+
+static inline pmd_t pmd_mksplitting(pmd_t pmd)
+{
+ pmd_val(pmd) |= _PAGE_SPLITTING;
+
+ return pmd;
+}
+
+extern void set_pmd_at(struct mm_struct *mm, unsigned long addr,
+ pmd_t *pmdp, pmd_t pmd);
+
+#define __HAVE_ARCH_PMDP_SPLITTING_FLUSH
+/* Extern to avoid header file madness */
+extern void pmdp_splitting_flush(struct vm_area_struct *vma,
+ unsigned long address,
+ pmd_t *pmdp);
+
+#define __HAVE_ARCH_PMD_WRITE
+static inline int pmd_write(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & _PAGE_WRITE);
+}
+
+static inline pmd_t pmd_wrprotect(pmd_t pmd)
+{
+ pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
+ return pmd;
+}
+
+static inline pmd_t pmd_mkwrite(pmd_t pmd)
+{
+ pmd_val(pmd) |= _PAGE_WRITE;
+ if (pmd_val(pmd) & _PAGE_MODIFIED)
+ pmd_val(pmd) |= _PAGE_SILENT_WRITE;
+
+ return pmd;
+}
+
+static inline int pmd_dirty(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & _PAGE_MODIFIED);
+}
+
+static inline pmd_t pmd_mkclean(pmd_t pmd)
+{
+ pmd_val(pmd) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE);
+ return pmd;
+}
+
+static inline pmd_t pmd_mkdirty(pmd_t pmd)
+{
+ pmd_val(pmd) |= _PAGE_MODIFIED;
+ if (pmd_val(pmd) & _PAGE_WRITE)
+ pmd_val(pmd) |= _PAGE_SILENT_WRITE;
+
+ return pmd;
+}
+
+static inline int pmd_young(pmd_t pmd)
+{
+ return !!(pmd_val(pmd) & _PAGE_ACCESSED);
+}
+
+static inline pmd_t pmd_mkold(pmd_t pmd)
+{
+ pmd_val(pmd) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
+
+ return pmd;
+}
+
+static inline pmd_t pmd_mkyoung(pmd_t pmd)
+{
+ pmd_val(pmd) |= _PAGE_ACCESSED;
+
+#ifdef CONFIG_CPU_MIPSR2
+ if (!(pmd_val(pmd) & _PAGE_NO_READ))
+ pmd_val(pmd) |= _PAGE_SILENT_READ;
+ else
+#endif
+ if (pmd_val(pmd) & _PAGE_READ)
+ pmd_val(pmd) |= _PAGE_SILENT_READ;
+
+ return pmd;
+}
+
+/* Extern to avoid header file madness */
+extern pmd_t mk_pmd(struct page *page, pgprot_t prot);
+
+static inline unsigned long pmd_pfn(pmd_t pmd)
+{
+ return pmd_val(pmd) >> _PFN_SHIFT;
+}
+
+static inline struct page *pmd_page(pmd_t pmd)
+{
+ if (pmd_trans_huge(pmd))
+ return pfn_to_page(pmd_pfn(pmd));
+
+ return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT);
+}
+
+static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
+{
+ pmd_val(pmd) = (pmd_val(pmd) & _PAGE_CHG_MASK) | pgprot_val(newprot);
+ return pmd;
+}
+
+static inline pmd_t pmd_mknotpresent(pmd_t pmd)
+{
+ pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY);
+
+ return pmd;
+}
+
+/*
+ * The generic version pmdp_get_and_clear uses a version of pmd_clear() with a
+ * different prototype.
+ */
+#define __HAVE_ARCH_PMDP_GET_AND_CLEAR
+static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm,
+ unsigned long address, pmd_t *pmdp)
+{
+ pmd_t old = *pmdp;
+
+ pmd_clear(pmdp);
+
+ return old;
+}
+
+#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
+
+#include <asm-generic/pgtable.h>
+
+/*
+ * uncached accelerated TLB map for video memory access
+ */
+#ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED
+#define __HAVE_PHYS_MEM_ACCESS_PROT
+
+struct file;
+pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
+ unsigned long size, pgprot_t vma_prot);
+int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
+ unsigned long size, pgprot_t *vma_prot);
+#endif
+
+/*
+ * We provide our own get_unmapped area to cope with the virtual aliasing
+ * constraints placed on us by the cache architecture.
+ */
+#define HAVE_ARCH_UNMAPPED_AREA
+#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+
+/*
+ * No page table caches to initialise
+ */
+#define pgtable_cache_init() do { } while (0)
+
+#endif /* _ASM_PGTABLE_H */
Code Review / kvmfornfv.git / blobdiff