474 lines
16 KiB
C
474 lines
16 KiB
C
#ifndef __ASM_SH_PGTABLE_32_H
|
|
#define __ASM_SH_PGTABLE_32_H
|
|
|
|
/*
|
|
* Linux PTEL encoding.
|
|
*
|
|
* Hardware and software bit definitions for the PTEL value (see below for
|
|
* notes on SH-X2 MMUs and 64-bit PTEs):
|
|
*
|
|
* - Bits 0 and 7 are reserved on SH-3 (_PAGE_WT and _PAGE_SZ1 on SH-4).
|
|
*
|
|
* - Bit 1 is the SH-bit, but is unused on SH-3 due to an MMU bug (the
|
|
* hardware PTEL value can't have the SH-bit set when MMUCR.IX is set,
|
|
* which is the default in cpu-sh3/mmu_context.h:MMU_CONTROL_INIT).
|
|
*
|
|
* In order to keep this relatively clean, do not use these for defining
|
|
* SH-3 specific flags until all of the other unused bits have been
|
|
* exhausted.
|
|
*
|
|
* - Bit 9 is reserved by everyone and used by _PAGE_PROTNONE.
|
|
*
|
|
* - Bits 10 and 11 are low bits of the PPN that are reserved on >= 4K pages.
|
|
* Bit 10 is used for _PAGE_ACCESSED, bit 11 remains unused.
|
|
*
|
|
* - Bits 31, 30, and 29 remain unused by everyone and can be used for future
|
|
* software flags, although care must be taken to update _PAGE_CLEAR_FLAGS.
|
|
*
|
|
* XXX: Leave the _PAGE_FILE and _PAGE_WT overhaul for a rainy day.
|
|
*
|
|
* SH-X2 MMUs and extended PTEs
|
|
*
|
|
* SH-X2 supports an extended mode TLB with split data arrays due to the
|
|
* number of bits needed for PR and SZ (now EPR and ESZ) encodings. The PR and
|
|
* SZ bit placeholders still exist in data array 1, but are implemented as
|
|
* reserved bits, with the real logic existing in data array 2.
|
|
*
|
|
* The downside to this is that we can no longer fit everything in to a 32-bit
|
|
* PTE encoding, so a 64-bit pte_t is necessary for these parts. On the plus
|
|
* side, this gives us quite a few spare bits to play with for future usage.
|
|
*/
|
|
/* Legacy and compat mode bits */
|
|
#define _PAGE_WT 0x001 /* WT-bit on SH-4, 0 on SH-3 */
|
|
#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 */
|
|
#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_ESZ2 0x0040 /* ESZ2-bit: Size of page */
|
|
#define _PAGE_EXT_ESZ3 0x0080 /* ESZ3-bit: Size of page */
|
|
|
|
#define _PAGE_EXT_USER_EXEC 0x0100 /* EPR0-bit: User space executable */
|
|
#define _PAGE_EXT_USER_WRITE 0x0200 /* EPR1-bit: User space writable */
|
|
#define _PAGE_EXT_USER_READ 0x0400 /* EPR2-bit: User space readable */
|
|
|
|
#define _PAGE_EXT_KERN_EXEC 0x0800 /* EPR3-bit: Kernel space executable */
|
|
#define _PAGE_EXT_KERN_WRITE 0x1000 /* EPR4-bit: Kernel space writable */
|
|
#define _PAGE_EXT_KERN_READ 0x2000 /* EPR5-bit: Kernel space readable */
|
|
|
|
/* Wrapper for extended mode pgprot twiddling */
|
|
#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_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 */
|
|
|
|
/* Mask which drops unused bits from the PTEL value */
|
|
#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
|
|
|
|
#define _PAGE_FLAGS_HARDWARE_MASK (0x1fffffff & ~(_PAGE_CLEAR_FLAGS))
|
|
|
|
/* Hardware flags, page size encoding */
|
|
#if defined(CONFIG_X2TLB)
|
|
# if defined(CONFIG_PAGE_SIZE_4KB)
|
|
# define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ0)
|
|
# elif defined(CONFIG_PAGE_SIZE_8KB)
|
|
# define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ1)
|
|
# elif defined(CONFIG_PAGE_SIZE_64KB)
|
|
# define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ2)
|
|
# endif
|
|
#else
|
|
# if defined(CONFIG_PAGE_SIZE_4KB)
|
|
# define _PAGE_FLAGS_HARD _PAGE_SZ0
|
|
# elif defined(CONFIG_PAGE_SIZE_64KB)
|
|
# define _PAGE_FLAGS_HARD _PAGE_SZ1
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(CONFIG_X2TLB)
|
|
# if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
|
|
# define _PAGE_SZHUGE (_PAGE_EXT_ESZ2)
|
|
# elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
|
|
# define _PAGE_SZHUGE (_PAGE_EXT_ESZ0 | _PAGE_EXT_ESZ2)
|
|
# elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
|
|
# define _PAGE_SZHUGE (_PAGE_EXT_ESZ0 | _PAGE_EXT_ESZ1 | _PAGE_EXT_ESZ2)
|
|
# elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
|
|
# define _PAGE_SZHUGE (_PAGE_EXT_ESZ3)
|
|
# elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
|
|
# define _PAGE_SZHUGE (_PAGE_EXT_ESZ2 | _PAGE_EXT_ESZ3)
|
|
# endif
|
|
#else
|
|
# 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)
|
|
# 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_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_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_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_KERN_READ | \
|
|
_PAGE_EXT_USER_READ))
|
|
|
|
#define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \
|
|
_PAGE_CACHABLE | _PAGE_FLAGS_HARD | \
|
|
_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_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_EXEC))
|
|
|
|
#define PAGE_KERNEL_NOCACHE \
|
|
__pgprot(_PAGE_PRESENT | _PAGE_DIRTY | \
|
|
_PAGE_ACCESSED | _PAGE_HW_SHARED | \
|
|
_PAGE_FLAGS_HARD | \
|
|
_PAGE_EXT(_PAGE_EXT_KERN_READ | \
|
|
_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))
|
|
|
|
#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_EXEC) \
|
|
(slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) | \
|
|
(type))
|
|
|
|
#elif defined(CONFIG_MMU) /* SH-X TLB */
|
|
#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_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_EXECREAD PAGE_READONLY
|
|
#define PAGE_RWX PAGE_SHARED
|
|
#define PAGE_WRITEONLY PAGE_SHARED
|
|
|
|
#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_EXECREAD __pgprot(0)
|
|
#define PAGE_RWX __pgprot(0)
|
|
#define PAGE_READONLY __pgprot(0)
|
|
#define PAGE_WRITEONLY __pgprot(0)
|
|
#define PAGE_KERNEL __pgprot(0)
|
|
#define PAGE_KERNEL_NOCACHE __pgprot(0)
|
|
#define PAGE_KERNEL_RO __pgprot(0)
|
|
|
|
#define PAGE_KERNEL_PCC(slot, type) \
|
|
__pgprot(0)
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
/*
|
|
* Certain architectures need to do special things when PTEs
|
|
* within a page table are directly modified. Thus, the following
|
|
* hook is made available.
|
|
*/
|
|
#ifdef CONFIG_X2TLB
|
|
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;
|
|
}
|
|
#else
|
|
#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
|
|
#endif
|
|
|
|
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
|
|
|
|
/*
|
|
* (pmds are folded into pgds so this doesn't get actually called,
|
|
* but the define is needed for a generic inline function.)
|
|
*/
|
|
#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
|
|
|
|
#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))
|
|
#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0)
|
|
#define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK)
|
|
|
|
#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
|
|
#define pte_page(x) pfn_to_page(pte_pfn(x))
|
|
|
|
/*
|
|
* The following only work if pte_present() is true.
|
|
* Undefined behaviour if not..
|
|
*/
|
|
#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_write(pte) ((pte).pte_high & _PAGE_EXT_USER_WRITE)
|
|
#else
|
|
#define pte_write(pte) ((pte).pte_low & _PAGE_RW)
|
|
#endif
|
|
|
|
#define PTE_BIT_FUNC(h,fn,op) \
|
|
static inline pte_t pte_##fn(pte_t pte) { pte.pte_##h op; return pte; }
|
|
|
|
#ifdef CONFIG_X2TLB
|
|
/*
|
|
* We cheat a bit in the SH-X2 TLB case. As the permission bits are
|
|
* 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, wrprotect, &= ~_PAGE_EXT_USER_WRITE);
|
|
PTE_BIT_FUNC(high, mkwrite, |= _PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE);
|
|
PTE_BIT_FUNC(high, mkhuge, |= _PAGE_SZHUGE);
|
|
#else
|
|
PTE_BIT_FUNC(low, wrprotect, &= ~_PAGE_RW);
|
|
PTE_BIT_FUNC(low, mkwrite, |= _PAGE_RW);
|
|
PTE_BIT_FUNC(low, mkhuge, |= _PAGE_SZHUGE);
|
|
#endif
|
|
|
|
PTE_BIT_FUNC(low, mkclean, &= ~_PAGE_DIRTY);
|
|
PTE_BIT_FUNC(low, mkdirty, |= _PAGE_DIRTY);
|
|
PTE_BIT_FUNC(low, mkold, &= ~_PAGE_ACCESSED);
|
|
PTE_BIT_FUNC(low, mkyoung, |= _PAGE_ACCESSED);
|
|
|
|
/*
|
|
* Macro and implementation to make a page protection as uncachable.
|
|
*/
|
|
#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,
|
|
* 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)
|
|
{
|
|
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)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))
|
|
|
|
/* 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_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_unmap(pte) do { } while (0)
|
|
#define pte_unmap_nested(pte) do { } while (0)
|
|
|
|
#ifdef CONFIG_X2TLB
|
|
#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))
|
|
#define pgd_ERROR(e) \
|
|
printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
|
|
#endif
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
#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
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __ASM_SH_PGTABLE_32_H */
|