-#ifndef __ASM_SH_PGTABLE_H
-#define __ASM_SH_PGTABLE_H
-
-#include <asm-generic/4level-fixup.h>
-
/*
+ * This file contains the functions and defines necessary to modify and
+ * use the SuperH page table tree.
+ *
* Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2002, 2003, 2004 Paul Mundt
+ * Copyright (C) 2002 - 2007 Paul Mundt
+ *
+ * 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.
*/
+#ifndef __ASM_SH_PGTABLE_H
+#define __ASM_SH_PGTABLE_H
-#include <linux/config.h>
-#include <asm/pgtable-2level.h>
+#include <asm-generic/pgtable-nopmd.h>
+#include <asm/page.h>
-/*
- * This file contains the functions and defines necessary to modify and use
- * the SuperH page table tree.
- */
#ifndef __ASSEMBLY__
-#include <asm/processor.h>
#include <asm/addrspace.h>
#include <asm/fixmap.h>
-#include <linux/threads.h>
-
-extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-extern void paging_init(void);
-
-/*
- * Basically we have the same two-level (which is the logical three level
- * Linux page table layout folded) page tables as the i386.
- */
/*
* ZERO_PAGE is a global shared page that is always zero: used
* for zero-mapped memory areas etc..
*/
-extern unsigned long empty_zero_page[1024];
+extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
#endif /* !__ASSEMBLY__ */
-#define PMD_SIZE (1UL << PMD_SHIFT)
-#define PMD_MASK (~(PMD_SIZE-1))
-#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
-#define PGDIR_MASK (~(PGDIR_SIZE-1))
-
-#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
-#define FIRST_USER_ADDRESS 0
-
-#define PTE_PHYS_MASK 0x1ffff000
-
-#ifndef __ASSEMBLY__
/*
- * First 1MB map is used by fixed purpose.
- * Currently only 4-enty (16kB) is used (see arch/sh/mm/cache.c)
+ * Effective and physical address definitions, to aid with sign
+ * extension.
*/
-#define VMALLOC_START (P3SEG+0x00100000)
-#define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
-
-#define _PAGE_WT 0x001 /* WT-bit on SH-4, 0 on SH-3 */
-#define _PAGE_HW_SHARED 0x002 /* SH-bit : page is shared among processes */
-#define _PAGE_DIRTY 0x004 /* D-bit : page changed */
-#define _PAGE_CACHABLE 0x008 /* C-bit : cachable */
-#define _PAGE_SZ0 0x010 /* SZ0-bit : Size of page */
-#define _PAGE_RW 0x020 /* PR0-bit : write access allowed */
-#define _PAGE_USER 0x040 /* PR1-bit : user space access allowed */
-#define _PAGE_SZ1 0x080 /* SZ1-bit : Size of page (on SH-4) */
-#define _PAGE_PRESENT 0x100 /* V-bit : page is valid */
-#define _PAGE_PROTNONE 0x200 /* software: if not present */
-#define _PAGE_ACCESSED 0x400 /* software: page referenced */
-#define _PAGE_U0_SHARED 0x800 /* software: page is shared in user space */
-
-#define _PAGE_FILE _PAGE_WT /* software: pagecache or swap? */
-
-/* software: moves to PTEA.TC (Timing Control) */
-#define _PAGE_PCC_AREA5 0x00000000 /* use BSC registers for area5 */
-#define _PAGE_PCC_AREA6 0x80000000 /* use BSC registers for area6 */
-
-/* software: moves to PTEA.SA[2:0] (Space Attributes) */
-#define _PAGE_PCC_IODYN 0x00000001 /* IO space, dynamically sized bus */
-#define _PAGE_PCC_IO8 0x20000000 /* IO space, 8 bit bus */
-#define _PAGE_PCC_IO16 0x20000001 /* IO space, 16 bit bus */
-#define _PAGE_PCC_COM8 0x40000000 /* Common Memory space, 8 bit bus */
-#define _PAGE_PCC_COM16 0x40000001 /* Common Memory space, 16 bit bus */
-#define _PAGE_PCC_ATR8 0x60000000 /* Attribute Memory space, 8 bit bus */
-#define _PAGE_PCC_ATR16 0x60000001 /* Attribute Memory space, 6 bit bus */
+#define NEFF 32
+#define NEFF_SIGN (1LL << (NEFF - 1))
+#define NEFF_MASK (-1LL << NEFF)
+#ifdef CONFIG_29BIT
+#define NPHYS 29
+#else
+#define NPHYS 32
+#endif
-/* Mask which drop software flags
- * We also drop WT bit since it is used for _PAGE_FILE
- * bit in this implementation.
- */
-#define _PAGE_CLEAR_FLAGS (_PAGE_WT | _PAGE_PROTNONE | _PAGE_ACCESSED | _PAGE_U0_SHARED)
+#define NPHYS_SIGN (1LL << (NPHYS - 1))
+#define NPHYS_MASK (-1LL << NPHYS)
-#if defined(CONFIG_CPU_SH3)
/*
- * MMU on SH-3 has bug on SH-bit: We can't use it if MMUCR.IX=1.
- * Work around: Just drop SH-bit.
+ * traditional two-level paging structure
*/
-#define _PAGE_FLAGS_HARDWARE_MASK (0x1fffffff & ~(_PAGE_CLEAR_FLAGS | _PAGE_HW_SHARED))
+/* PTE bits */
+#if defined(CONFIG_X2TLB) || defined(CONFIG_SUPERH64)
+# define PTE_MAGNITUDE 3 /* 64-bit PTEs on extended mode SH-X2 TLB */
#else
-#define _PAGE_FLAGS_HARDWARE_MASK (0x1fffffff & ~(_PAGE_CLEAR_FLAGS))
+# define PTE_MAGNITUDE 2 /* 32-bit PTEs */
#endif
+#define PTE_SHIFT PAGE_SHIFT
+#define PTE_BITS (PTE_SHIFT - PTE_MAGNITUDE)
+
+/* PGD bits */
+#define PGDIR_SHIFT (PTE_SHIFT + PTE_BITS)
+#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
+#define PGDIR_MASK (~(PGDIR_SIZE-1))
+
+/* Entries per level */
+#define PTRS_PER_PTE (PAGE_SIZE / (1 << PTE_MAGNITUDE))
+#define PTRS_PER_PGD (PAGE_SIZE / sizeof(pgd_t))
-/* Hardware flags: SZ0=1 (4k-byte) */
-#define _PAGE_FLAGS_HARD _PAGE_SZ0
+#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
+#define FIRST_USER_ADDRESS 0
-#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
-#define _PAGE_SZHUGE (_PAGE_SZ1)
-#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
-#define _PAGE_SZHUGE (_PAGE_SZ0 | _PAGE_SZ1)
+#ifdef CONFIG_32BIT
+#define PHYS_ADDR_MASK 0xffffffff
+#else
+#define PHYS_ADDR_MASK 0x1fffffff
#endif
-#define _PAGE_SHARED _PAGE_U0_SHARED
+#define PTE_PHYS_MASK (PHYS_ADDR_MASK & PAGE_MASK)
-#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
-#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_SHARED)
+#ifdef CONFIG_SUPERH32
+#define VMALLOC_START (P3SEG)
+#else
+#define VMALLOC_START (0xf0000000)
+#endif
+#define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
-#ifdef CONFIG_MMU
-#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE |_PAGE_ACCESSED | _PAGE_FLAGS_HARD)
-#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_CACHABLE |_PAGE_ACCESSED | _PAGE_SHARED | _PAGE_FLAGS_HARD)
-#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
-#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | _PAGE_ACCESSED | _PAGE_FLAGS_HARD)
-#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
-#define PAGE_KERNEL_NOCACHE \
- __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
-#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_HW_SHARED | _PAGE_FLAGS_HARD)
-#define PAGE_KERNEL_PCC(slot, type) \
- __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_FLAGS_HARD | (slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) | (type))
-#else /* no mmu */
-#define PAGE_NONE __pgprot(0)
-#define PAGE_SHARED __pgprot(0)
-#define PAGE_COPY __pgprot(0)
-#define PAGE_READONLY __pgprot(0)
-#define PAGE_KERNEL __pgprot(0)
-#define PAGE_KERNEL_NOCACHE __pgprot(0)
-#define PAGE_KERNEL_RO __pgprot(0)
-#define PAGE_KERNEL_PCC __pgprot(0)
+#if defined(CONFIG_SUPERH32)
+#include <asm/pgtable_32.h>
+#else
+#include <asm/pgtable_64.h>
#endif
/*
- * As i386 and MIPS, SuperH can't do page protection for execute, and
- * considers that the same as a read. Also, write permissions imply
- * read permissions. This is the closest we can get..
+ * SH-X and lower (legacy) SuperH parts (SH-3, SH-4, some SH-4A) can't do page
+ * protection for execute, and considers it the same as a read. Also, write
+ * permission implies read permission. This is the closest we can get..
+ *
+ * SH-X2 (SH7785) and later parts take this to the opposite end of the extreme,
+ * not only supporting separate execute, read, and write bits, but having
+ * completely separate permission bits for user and kernel space.
*/
-
+ /*xwr*/
#define __P000 PAGE_NONE
#define __P001 PAGE_READONLY
#define __P010 PAGE_COPY
#define __P011 PAGE_COPY
-#define __P100 PAGE_READONLY
-#define __P101 PAGE_READONLY
+#define __P100 PAGE_EXECREAD
+#define __P101 PAGE_EXECREAD
#define __P110 PAGE_COPY
#define __P111 PAGE_COPY
#define __S000 PAGE_NONE
#define __S001 PAGE_READONLY
-#define __S010 PAGE_SHARED
+#define __S010 PAGE_WRITEONLY
#define __S011 PAGE_SHARED
-#define __S100 PAGE_READONLY
-#define __S101 PAGE_READONLY
-#define __S110 PAGE_SHARED
-#define __S111 PAGE_SHARED
-
-#define pte_none(x) (!pte_val(x))
-#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
-#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
-
-#define pmd_none(x) (!pmd_val(x))
-#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
-#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
-#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
-
-#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
-#define pte_page(x) phys_to_page(pte_val(x)&PTE_PHYS_MASK)
-
-/*
- * The following only work if pte_present() is true.
- * Undefined behaviour if not..
- */
-static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; }
-static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_USER; }
-static inline int pte_dirty(pte_t pte){ return pte_val(pte) & _PAGE_DIRTY; }
-static inline int pte_young(pte_t pte){ return pte_val(pte) & _PAGE_ACCESSED; }
-static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
-static inline int pte_write(pte_t pte){ return pte_val(pte) & _PAGE_RW; }
-static inline int pte_not_present(pte_t pte){ return !(pte_val(pte) & _PAGE_PRESENT); }
-
-static inline pte_t pte_rdprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
-static inline pte_t pte_exprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; }
-static inline pte_t pte_mkclean(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; }
-static inline pte_t pte_mkold(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; }
-static inline pte_t pte_wrprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; }
-static inline pte_t pte_mkread(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; }
-static inline pte_t pte_mkexec(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; }
-static inline pte_t pte_mkdirty(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; }
-static inline pte_t pte_mkyoung(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; }
-static inline pte_t pte_mkwrite(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; }
-static inline pte_t pte_mkhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_SZHUGE)); return pte; }
-
-/*
- * Macro and implementation to make a page protection as uncachable.
- */
-#define pgprot_noncached pgprot_noncached
-
-static inline pgprot_t pgprot_noncached(pgprot_t _prot)
-{
- unsigned long prot = pgprot_val(_prot);
-
- prot &= ~_PAGE_CACHABLE;
- return __pgprot(prot);
-}
-
-#define pgprot_writecombine(prot) __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE)
-
-/*
- * Conversion functions: convert a page and protection to a page entry,
- * and a page entry and page directory to the page they refer to.
- *
- * extern pte_t mk_pte(struct page *page, pgprot_t pgprot)
- */
-#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
-
-static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
-{ set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot))); return pte; }
-
-#define page_pte(page) page_pte_prot(page, __pgprot(0))
-
-#define pmd_page_kernel(pmd) \
-((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
-
-#define pmd_page(pmd) \
- (phys_to_page(pmd_val(pmd)))
-
-/* to find an entry in a page-table-directory. */
-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
-#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
-
-/* to find an entry in a kernel page-table-directory */
-#define pgd_offset_k(address) pgd_offset(&init_mm, address)
-
-/* Find an entry in the third-level page table.. */
-#define pte_index(address) \
- ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
-#define pte_offset_kernel(dir, address) \
- ((pte_t *) pmd_page_kernel(*(dir)) + pte_index(address))
-#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
-#define pte_offset_map_nested(dir, address) pte_offset_kernel(dir, address)
-#define pte_unmap(pte) do { } while (0)
-#define pte_unmap_nested(pte) do { } while (0)
-
-struct vm_area_struct;
-extern void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte);
-
-/* Encode and de-code a swap entry */
-/*
- * NOTE: We should set ZEROs at the position of _PAGE_PRESENT
- * and _PAGE_PROTNONE bits
- */
-#define __swp_type(x) ((x).val & 0xff)
-#define __swp_offset(x) ((x).val >> 10)
-#define __swp_entry(type, offset) ((swp_entry_t) { (type) | ((offset) << 10) })
-#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 1 })
-#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 1 })
-
-/*
- * Encode and decode a nonlinear file mapping entry
- */
-#define PTE_FILE_MAX_BITS 29
-#define pte_to_pgoff(pte) (pte_val(pte) >> 1)
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 1) | _PAGE_FILE })
+#define __S100 PAGE_EXECREAD
+#define __S101 PAGE_EXECREAD
+#define __S110 PAGE_RWX
+#define __S111 PAGE_RWX
typedef pte_t *pte_addr_t;
-#endif /* !__ASSEMBLY__ */
-
#define kern_addr_valid(addr) (1)
-#define io_remap_page_range(vma, vaddr, paddr, size, prot) \
- remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)
-
#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
remap_pfn_range(vma, vaddr, pfn, size, prot)
-#define MK_IOSPACE_PFN(space, pfn) (pfn)
-#define GET_IOSPACE(pfn) 0
-#define GET_PFN(pfn) (pfn)
+#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
/*
* No page table caches to initialise
*/
#define pgtable_cache_init() do { } while (0)
-#ifndef CONFIG_MMU
-extern unsigned int kobjsize(const void *objp);
-#endif /* !CONFIG_MMU */
-
-#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
+#if !defined(CONFIG_CACHE_OFF) && (defined(CONFIG_CPU_SH4) || \
+ defined(CONFIG_SH7705_CACHE_32KB))
+struct mm_struct;
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-extern pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
+pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
#endif
-#include <asm-generic/pgtable.h>
+struct vm_area_struct;
+extern void update_mmu_cache(struct vm_area_struct * vma,
+ unsigned long address, pte_t pte);
+extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
+extern void paging_init(void);
+extern void page_table_range_init(unsigned long start, unsigned long end,
+ pgd_t *pgd);
-#endif /* __ASM_SH_PAGE_H */
+#include <asm-generic/pgtable.h>
+#endif /* __ASM_SH_PGTABLE_H */
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