123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478 |
- /* SPDX-License-Identifier: GPL-2.0 */
- #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, and bit 11 is used for _PAGE_SPECIAL.
- *
- * - On 29 bit platforms, bits 31 to 29 are used for the space attributes
- * and timing control which (together with bit 0) are moved into the
- * old-style PTEA on the parts that support it.
- *
- * 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_SPECIAL 0x800 /* software: special page */
- #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 */
- #define _PAGE_EXT_WIRED 0x4000 /* software: Wire TLB entry */
- /* Wrapper for extended mode pgprot twiddling */
- #define _PAGE_EXT(x) ((unsigned long long)(x) << 32)
- #ifdef CONFIG_X2TLB
- #define _PAGE_PCC_MASK 0x00000000 /* No legacy PTEA support */
- #else
- /* 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 _PAGE_PCC_MASK 0xe0000001
- /* copy the ptea attributes */
- static inline unsigned long copy_ptea_attributes(unsigned long x)
- {
- return ((x >> 28) & 0xe) | (x & 0x1);
- }
- #endif
- /* Mask which drops unused bits from the PTEL value */
- #if defined(CONFIG_CPU_SH3)
- #define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED| \
- _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_PR_MASK | _PAGE_SZ_MASK)
- #else
- #define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED)
- #endif
- #define _PAGE_FLAGS_HARDWARE_MASK (phys_addr_mask() & ~(_PAGE_CLEAR_FLAGS))
- /* Hardware flags, page size encoding */
- #if !defined(CONFIG_MMU)
- # define _PAGE_FLAGS_HARD 0ULL
- #elif 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
- # define _PAGE_WIRED (_PAGE_EXT(_PAGE_EXT_WIRED))
- #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
- # define _PAGE_WIRED (0)
- #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
- /*
- * Mask of bits that are to be preserved across pgprot changes.
- */
- #define _PAGE_CHG_MASK \
- (PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | \
- _PAGE_DIRTY | _PAGE_SPECIAL)
- #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(0)
- #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_special(pte) ((pte).pte_low & _PAGE_SPECIAL)
- #ifdef CONFIG_X2TLB
- #define pte_write(pte) \
- ((pte).pte_high & (_PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_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 | _PAGE_EXT_KERN_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);
- PTE_BIT_FUNC(low, mkspecial, |= _PAGE_SPECIAL);
- /*
- * 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))
- #define __pgd_offset(address) pgd_index(address)
- /* to find an entry in a kernel page-table-directory */
- #define pgd_offset_k(address) pgd_offset(&init_mm, address)
- #define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
- #define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
- /* Find an entry in the third-level page table.. */
- #define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
- #define __pte_offset(address) pte_index(address)
- #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_unmap(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_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.
- *
- * 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 })
- #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 })
- #endif
- #endif /* __ASSEMBLY__ */
- #endif /* __ASM_SH_PGTABLE_32_H */
|