/* PGD bits */
#define PGDIR_SHIFT (PTE_SHIFT + PTE_BITS)
-#define PGDIR_BITS (32 - PGDIR_SHIFT)
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
/* Entries per level */
-#define PTRS_PER_PTE (1UL << PTE_BITS)
-#define PTRS_PER_PGD (1UL << PGDIR_BITS)
+#define PTRS_PER_PTE (PAGE_SIZE / (1 << PTE_MAGNITUDE))
+#define PTRS_PER_PGD (PAGE_SIZE / sizeof(pgd_t))
#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
#define FIRST_USER_ADDRESS 0
-#define PTE_PHYS_MASK 0x1ffff000
+#define PTE_PHYS_MASK (0x20000000 - PAGE_SIZE)
-/*
- * First 1MB map is used by fixed purpose.
- * Currently only 4-enty (16kB) is used (see arch/sh/mm/cache.c)
- */
-#define VMALLOC_START (P3SEG+0x00100000)
+#define VMALLOC_START (P3SEG)
#define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
/*
#define _PAGE_HW_SHARED 0x002 /* SH-bit : shared among processes */
#define _PAGE_DIRTY 0x004 /* D-bit : page changed */
#define _PAGE_CACHABLE 0x008 /* C-bit : cachable */
-#ifndef CONFIG_X2TLB
-# 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) */
-#endif
+#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_FILE _PAGE_WT /* software: pagecache or swap? */
+#define _PAGE_SZ_MASK (_PAGE_SZ0 | _PAGE_SZ1)
+#define _PAGE_PR_MASK (_PAGE_RW | _PAGE_USER)
+
/* Extended mode bits */
#define _PAGE_EXT_ESZ0 0x0010 /* ESZ0-bit: Size of page */
#define _PAGE_EXT_ESZ1 0x0020 /* ESZ1-bit: Size of page */
#define _PAGE_EXT_KERN_READ 0x2000 /* EPR5-bit: Kernel space readable */
/* Wrapper for extended mode pgprot twiddling */
-#ifdef CONFIG_X2TLB
-# define _PAGE_EXT(x) ((unsigned long long)(x) << 32)
-#else
-# define _PAGE_EXT(x) (0)
-#endif
+#define _PAGE_EXT(x) ((unsigned long long)(x) << 32)
/* software: moves to PTEA.TC (Timing Control) */
#define _PAGE_PCC_AREA5 0x00000000 /* use BSC registers for area5 */
#define _PAGE_PCC_ATR16 0x60000001 /* Attribute Memory space, 6 bit bus */
/* Mask which drops unused bits from the PTEL value */
-#ifdef CONFIG_CPU_SH3
+#if defined(CONFIG_CPU_SH3)
#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED| \
_PAGE_FILE | _PAGE_SZ1 | \
_PAGE_HW_SHARED)
+#elif defined(CONFIG_X2TLB)
+/* Get rid of the legacy PR/SZ bits when using extended mode */
+#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | \
+ _PAGE_FILE | _PAGE_PR_MASK | _PAGE_SZ_MASK)
#else
#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | _PAGE_FILE)
#endif
# endif
#endif
+/*
+ * Stub out _PAGE_SZHUGE if we don't have a good definition for it,
+ * to make pte_mkhuge() happy.
+ */
+#ifndef _PAGE_SZHUGE
+# define _PAGE_SZHUGE (_PAGE_FLAGS_HARD)
+#endif
+
#define _PAGE_CHG_MASK \
(PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | _PAGE_DIRTY)
#ifndef __ASSEMBLY__
#if defined(CONFIG_X2TLB) /* SH-X2 TLB */
-#define _PAGE_TABLE \
- (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY | \
- _PAGE_EXT(_PAGE_EXT_USER_READ | _PAGE_EXT_USER_WRITE))
-
-#define _KERNPG_TABLE \
- (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY | \
- _PAGE_EXT(_PAGE_EXT_KERN_READ | _PAGE_EXT_KERN_WRITE))
-
#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE | \
_PAGE_ACCESSED | _PAGE_FLAGS_HARD)
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
_PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
- _PAGE_EXT(_PAGE_EXT_USER_READ | \
- _PAGE_EXT_USER_WRITE))
+ _PAGE_EXT(_PAGE_EXT_KERN_READ | \
+ _PAGE_EXT_KERN_WRITE | \
+ _PAGE_EXT_USER_READ | \
+ _PAGE_EXT_USER_WRITE))
#define PAGE_EXECREAD __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
_PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
- _PAGE_EXT(_PAGE_EXT_USER_EXEC | \
- _PAGE_EXT_USER_READ))
+ _PAGE_EXT(_PAGE_EXT_KERN_EXEC | \
+ _PAGE_EXT_KERN_READ | \
+ _PAGE_EXT_USER_EXEC | \
+ _PAGE_EXT_USER_READ))
#define PAGE_COPY PAGE_EXECREAD
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
_PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
- _PAGE_EXT(_PAGE_EXT_USER_READ))
+ _PAGE_EXT(_PAGE_EXT_KERN_READ | \
+ _PAGE_EXT_USER_READ))
#define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
_PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
- _PAGE_EXT(_PAGE_EXT_USER_WRITE))
+ _PAGE_EXT(_PAGE_EXT_KERN_WRITE | \
+ _PAGE_EXT_USER_WRITE))
#define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
_PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
- _PAGE_EXT(_PAGE_EXT_USER_WRITE | \
- _PAGE_EXT_USER_READ | \
+ _PAGE_EXT(_PAGE_EXT_KERN_WRITE | \
+ _PAGE_EXT_KERN_READ | \
+ _PAGE_EXT_KERN_EXEC | \
+ _PAGE_EXT_USER_WRITE | \
+ _PAGE_EXT_USER_READ | \
_PAGE_EXT_USER_EXEC))
#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \
_PAGE_DIRTY | _PAGE_ACCESSED | \
_PAGE_HW_SHARED | _PAGE_FLAGS_HARD | \
_PAGE_EXT(_PAGE_EXT_KERN_READ | \
- _PAGE_EXT_KERN_WRITE | \
+ _PAGE_EXT_KERN_WRITE | \
_PAGE_EXT_KERN_EXEC))
#define PAGE_KERNEL_NOCACHE \
_PAGE_ACCESSED | _PAGE_HW_SHARED | \
_PAGE_FLAGS_HARD | \
_PAGE_EXT(_PAGE_EXT_KERN_READ | \
- _PAGE_EXT_KERN_WRITE | \
+ _PAGE_EXT_KERN_WRITE | \
_PAGE_EXT_KERN_EXEC))
#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \
_PAGE_DIRTY | _PAGE_ACCESSED | \
_PAGE_HW_SHARED | _PAGE_FLAGS_HARD | \
_PAGE_EXT(_PAGE_EXT_KERN_READ | \
- _PAGE_EXT_KERN_EXEC))
+ _PAGE_EXT_KERN_EXEC))
#define PAGE_KERNEL_PCC(slot, type) \
__pgprot(_PAGE_PRESENT | _PAGE_DIRTY | \
_PAGE_ACCESSED | _PAGE_FLAGS_HARD | \
_PAGE_EXT(_PAGE_EXT_KERN_READ | \
- _PAGE_EXT_KERN_WRITE | \
+ _PAGE_EXT_KERN_WRITE | \
_PAGE_EXT_KERN_EXEC) \
(slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) | \
(type))
#elif defined(CONFIG_MMU) /* SH-X TLB */
-#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_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE | \
_PAGE_ACCESSED | _PAGE_FLAGS_HARD)
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
#define pte_pfn(x) ((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
-#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
-#define pfn_pmd(pfn, prot) __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
-#define pte_none(x) (!pte_val(x))
-#define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE))
+#define pfn_pte(pfn, prot) \
+ __pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot))
+#define pfn_pmd(pfn, prot) \
+ __pmd(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot))
+
+#define pte_none(x) (!pte_val(x))
+#define pte_present(x) ((x).pte_low & (_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_present(x) (pmd_val(x))
#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 pmd_bad(x) (pmd_val(x) & ~PAGE_MASK)
#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..
*/
-#define pte_not_present(pte) (!(pte_val(pte) & _PAGE_PRESENT))
-#define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY)
-#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
-#define pte_file(pte) (pte_val(pte) & _PAGE_FILE)
+#define pte_not_present(pte) (!((pte).pte_low & _PAGE_PRESENT))
+#define pte_dirty(pte) ((pte).pte_low & _PAGE_DIRTY)
+#define pte_young(pte) ((pte).pte_low & _PAGE_ACCESSED)
+#define pte_file(pte) ((pte).pte_low & _PAGE_FILE)
#ifdef CONFIG_X2TLB
-#define pte_read(pte) ((pte).pte_high & _PAGE_EXT_USER_READ)
-#define pte_exec(pte) ((pte).pte_high & _PAGE_EXT_USER_EXEC)
#define pte_write(pte) ((pte).pte_high & _PAGE_EXT_USER_WRITE)
#else
-#define pte_read(pte) (pte_val(pte) & _PAGE_USER)
-#define pte_exec(pte) (pte_val(pte) & _PAGE_USER)
-#define pte_write(pte) (pte_val(pte) & _PAGE_RW)
+#define pte_write(pte) ((pte).pte_low & _PAGE_RW)
#endif
#define PTE_BIT_FUNC(h,fn,op) \
* individually toggled (and user permissions are entirely decoupled from
* kernel permissions), we attempt to couple them a bit more sanely here.
*/
-PTE_BIT_FUNC(high, rdprotect, &= ~_PAGE_EXT_USER_READ);
-PTE_BIT_FUNC(high, mkread, |= _PAGE_EXT_USER_READ | _PAGE_EXT_KERN_READ);
PTE_BIT_FUNC(high, wrprotect, &= ~_PAGE_EXT_USER_WRITE);
PTE_BIT_FUNC(high, mkwrite, |= _PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE);
-PTE_BIT_FUNC(high, exprotect, &= ~_PAGE_EXT_USER_EXEC);
-PTE_BIT_FUNC(high, mkexec, |= _PAGE_EXT_USER_EXEC | _PAGE_EXT_KERN_EXEC);
PTE_BIT_FUNC(high, mkhuge, |= _PAGE_SZHUGE);
#else
-PTE_BIT_FUNC(low, rdprotect, &= ~_PAGE_USER);
-PTE_BIT_FUNC(low, mkread, |= _PAGE_USER);
PTE_BIT_FUNC(low, wrprotect, &= ~_PAGE_RW);
PTE_BIT_FUNC(low, mkwrite, |= _PAGE_RW);
-PTE_BIT_FUNC(low, exprotect, &= ~_PAGE_USER);
-PTE_BIT_FUNC(low, mkexec, |= _PAGE_USER);
PTE_BIT_FUNC(low, mkhuge, |= _PAGE_SZHUGE);
#endif
/*
* Macro and implementation to make a page protection as uncachable.
*/
-#define pgprot_noncached pgprot_noncached
+#define pgprot_writecombine(prot) \
+ __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE)
-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)
+#define pgprot_noncached pgprot_writecombine
/*
* Conversion functions: convert a page and protection to a page entry,
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)));
+ pte.pte_low &= _PAGE_CHG_MASK;
+ pte.pte_low |= pgprot_val(newprot);
+
+#ifdef CONFIG_X2TLB
+ pte.pte_high |= pgprot_val(newprot) >> 32;
+#endif
+
return pte;
}
-#define pmd_page_vaddr(pmd) \
-((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
-
-#define pmd_page(pmd) \
- (phys_to_page(pmd_val(pmd)))
+#define pmd_page_vaddr(pmd) ((unsigned long)pmd_val(pmd))
+#define pmd_page(pmd) (virt_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))
+#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)
+#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_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(dir, address) \
((pte_t *) pmd_page_vaddr(*(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_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)
#define pte_ERROR(e) \
printk("%s:%d: bad pte %p(%08lx%08lx).\n", __FILE__, __LINE__, \
&(e), (e).pte_high, (e).pte_low)
+#define pgd_ERROR(e) \
+ printk("%s:%d: bad pgd %016llx.\n", __FILE__, __LINE__, pgd_val(e))
#else
#define pte_ERROR(e) \
printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
-#endif
-
#define pgd_ERROR(e) \
printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
+#endif
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 */
/*
+ * Encode and de-code a swap entry
+ *
+ * Constraints:
+ * _PAGE_FILE at bit 0
+ * _PAGE_PRESENT at bit 8
+ * _PAGE_PROTNONE at bit 9
+ *
+ * For the normal case, we encode the swap type into bits 0:7 and the
+ * swap offset into bits 10:30. For the 64-bit PTE case, we keep the
+ * preserved bits in the low 32-bits and use the upper 32 as the swap
+ * offset (along with a 5-bit type), following the same approach as x86
+ * PAE. This keeps the logic quite simple, and allows for a full 32
+ * PTE_FILE_MAX_BITS, as opposed to the 29-bits we're constrained with
+ * in the pte_low case.
+ *
+ * As is evident by the Alpha code, if we ever get a 64-bit unsigned
+ * long (swp_entry_t) to match up with the 64-bit PTEs, this all becomes
+ * much cleaner..
+ *
* 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 })
+#ifdef CONFIG_X2TLB
+#define __swp_type(x) ((x).val & 0x1f)
+#define __swp_offset(x) ((x).val >> 5)
+#define __swp_entry(type, offset) ((swp_entry_t){ (type) | (offset) << 5})
+#define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high })
+#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
+
+/*
+ * Encode and decode a nonlinear file mapping entry
+ */
+#define pte_to_pgoff(pte) ((pte).pte_high)
+#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
+
+#define PTE_FILE_MAX_BITS 32
+#else
+#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 })
+#endif
typedef pte_t *pte_addr_t;
#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)
-
struct mm_struct;
/*
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))
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
extern pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
#endif