1249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifndef __ASM_SH_PGTABLE_32_H 2249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __ASM_SH_PGTABLE_32_H 3249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 4249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 5249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Linux PTEL encoding. 6249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 7249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Hardware and software bit definitions for the PTEL value (see below for 8249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * notes on SH-X2 MMUs and 64-bit PTEs): 9249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 10249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * - Bits 0 and 7 are reserved on SH-3 (_PAGE_WT and _PAGE_SZ1 on SH-4). 11249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 12249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * - Bit 1 is the SH-bit, but is unused on SH-3 due to an MMU bug (the 13249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * hardware PTEL value can't have the SH-bit set when MMUCR.IX is set, 14249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * which is the default in cpu-sh3/mmu_context.h:MMU_CONTROL_INIT). 15249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 16249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * In order to keep this relatively clean, do not use these for defining 17249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * SH-3 specific flags until all of the other unused bits have been 18249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * exhausted. 19249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 20249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * - Bit 9 is reserved by everyone and used by _PAGE_PROTNONE. 21249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 22249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * - Bits 10 and 11 are low bits of the PPN that are reserved on >= 4K pages. 23c0b96cf639aa1bfa8983f734d4225091aa813e00Paul Mundt * Bit 10 is used for _PAGE_ACCESSED, and bit 11 is used for _PAGE_SPECIAL. 24249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 25fc55888f83c1c0ac09abe4680f9a94fc0662677fStuart Menefy * - On 29 bit platforms, bits 31 to 29 are used for the space attributes 26fc55888f83c1c0ac09abe4680f9a94fc0662677fStuart Menefy * and timing control which (together with bit 0) are moved into the 27fc55888f83c1c0ac09abe4680f9a94fc0662677fStuart Menefy * old-style PTEA on the parts that support it. 28249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 29249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * XXX: Leave the _PAGE_FILE and _PAGE_WT overhaul for a rainy day. 30249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 31249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * SH-X2 MMUs and extended PTEs 32249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 33249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * SH-X2 supports an extended mode TLB with split data arrays due to the 34249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * number of bits needed for PR and SZ (now EPR and ESZ) encodings. The PR and 35249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * SZ bit placeholders still exist in data array 1, but are implemented as 36249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * reserved bits, with the real logic existing in data array 2. 37249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 38249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * The downside to this is that we can no longer fit everything in to a 32-bit 39249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * PTE encoding, so a 64-bit pte_t is necessary for these parts. On the plus 40249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * side, this gives us quite a few spare bits to play with for future usage. 41249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 42249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* Legacy and compat mode bits */ 43249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_WT 0x001 /* WT-bit on SH-4, 0 on SH-3 */ 44249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_HW_SHARED 0x002 /* SH-bit : shared among processes */ 45249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_DIRTY 0x004 /* D-bit : page changed */ 46249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_CACHABLE 0x008 /* C-bit : cachable */ 47249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_SZ0 0x010 /* SZ0-bit : Size of page */ 48249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_RW 0x020 /* PR0-bit : write access allowed */ 49249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_USER 0x040 /* PR1-bit : user space access allowed*/ 50249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_SZ1 0x080 /* SZ1-bit : Size of page (on SH-4) */ 51249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PRESENT 0x100 /* V-bit : page is valid */ 52249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PROTNONE 0x200 /* software: if not present */ 53249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_ACCESSED 0x400 /* software: page referenced */ 54249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_FILE _PAGE_WT /* software: pagecache or swap? */ 55c0b96cf639aa1bfa8983f734d4225091aa813e00Paul Mundt#define _PAGE_SPECIAL 0x800 /* software: special page */ 56249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 57249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_SZ_MASK (_PAGE_SZ0 | _PAGE_SZ1) 58249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PR_MASK (_PAGE_RW | _PAGE_USER) 59249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 60249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* Extended mode bits */ 61249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_ESZ0 0x0010 /* ESZ0-bit: Size of page */ 62249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_ESZ1 0x0020 /* ESZ1-bit: Size of page */ 63249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_ESZ2 0x0040 /* ESZ2-bit: Size of page */ 64249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_ESZ3 0x0080 /* ESZ3-bit: Size of page */ 65249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 66249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_USER_EXEC 0x0100 /* EPR0-bit: User space executable */ 67249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_USER_WRITE 0x0200 /* EPR1-bit: User space writable */ 68249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_USER_READ 0x0400 /* EPR2-bit: User space readable */ 69249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 70249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_KERN_EXEC 0x0800 /* EPR3-bit: Kernel space executable */ 71249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_KERN_WRITE 0x1000 /* EPR4-bit: Kernel space writable */ 72249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT_KERN_READ 0x2000 /* EPR5-bit: Kernel space readable */ 73249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 748eda55142080f0373b1f0268fe6d6807f193e713Matt Fleming#define _PAGE_EXT_WIRED 0x4000 /* software: Wire TLB entry */ 758eda55142080f0373b1f0268fe6d6807f193e713Matt Fleming 76249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* Wrapper for extended mode pgprot twiddling */ 77249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_EXT(x) ((unsigned long long)(x) << 32) 78249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 79efb3e34b6176d30c4fe8635fa8e1beb6280cc2cdPaul Mundt#ifdef CONFIG_X2TLB 80efb3e34b6176d30c4fe8635fa8e1beb6280cc2cdPaul Mundt#define _PAGE_PCC_MASK 0x00000000 /* No legacy PTEA support */ 81efb3e34b6176d30c4fe8635fa8e1beb6280cc2cdPaul Mundt#else 82efb3e34b6176d30c4fe8635fa8e1beb6280cc2cdPaul Mundt 83249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* software: moves to PTEA.TC (Timing Control) */ 84249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_AREA5 0x00000000 /* use BSC registers for area5 */ 85249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_AREA6 0x80000000 /* use BSC registers for area6 */ 86249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 87249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* software: moves to PTEA.SA[2:0] (Space Attributes) */ 88249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_IODYN 0x00000001 /* IO space, dynamically sized bus */ 89249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_IO8 0x20000000 /* IO space, 8 bit bus */ 90249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_IO16 0x20000001 /* IO space, 16 bit bus */ 91249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_COM8 0x40000000 /* Common Memory space, 8 bit bus */ 92249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_COM16 0x40000001 /* Common Memory space, 16 bit bus */ 93249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_ATR8 0x60000000 /* Attribute Memory space, 8 bit bus */ 94249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_PCC_ATR16 0x60000001 /* Attribute Memory space, 6 bit bus */ 95249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 96efb3e34b6176d30c4fe8635fa8e1beb6280cc2cdPaul Mundt#define _PAGE_PCC_MASK 0xe0000001 97efb3e34b6176d30c4fe8635fa8e1beb6280cc2cdPaul Mundt 986503fe4a6508673c15a509ec4ac3ca5979ae9593Michael Trimarchi/* copy the ptea attributes */ 996503fe4a6508673c15a509ec4ac3ca5979ae9593Michael Trimarchistatic inline unsigned long copy_ptea_attributes(unsigned long x) 1006503fe4a6508673c15a509ec4ac3ca5979ae9593Michael Trimarchi{ 1016503fe4a6508673c15a509ec4ac3ca5979ae9593Michael Trimarchi return ((x >> 28) & 0xe) | (x & 0x1); 1026503fe4a6508673c15a509ec4ac3ca5979ae9593Michael Trimarchi} 1036503fe4a6508673c15a509ec4ac3ca5979ae9593Michael Trimarchi#endif 1046503fe4a6508673c15a509ec4ac3ca5979ae9593Michael Trimarchi 105249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* Mask which drops unused bits from the PTEL value */ 106249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#if defined(CONFIG_CPU_SH3) 107249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED| \ 108249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_FILE | _PAGE_SZ1 | \ 109249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_HW_SHARED) 110249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#elif defined(CONFIG_X2TLB) 111249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* Get rid of the legacy PR/SZ bits when using extended mode */ 112249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | \ 113249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_FILE | _PAGE_PR_MASK | _PAGE_SZ_MASK) 114249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 115249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | _PAGE_FILE) 116249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 117249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 1181f69b6af9171f50135cce8023c84d82fbf42a8f5Matt Fleming#define _PAGE_FLAGS_HARDWARE_MASK (phys_addr_mask() & ~(_PAGE_CLEAR_FLAGS)) 119249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 120249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* Hardware flags, page size encoding */ 12166dfe18114839a7297f56f43f03125f4121de79bPaul Mundt#if !defined(CONFIG_MMU) 12266dfe18114839a7297f56f43f03125f4121de79bPaul Mundt# define _PAGE_FLAGS_HARD 0ULL 12366dfe18114839a7297f56f43f03125f4121de79bPaul Mundt#elif defined(CONFIG_X2TLB) 124249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# if defined(CONFIG_PAGE_SIZE_4KB) 125249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ0) 126249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_PAGE_SIZE_8KB) 127249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ1) 128249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_PAGE_SIZE_64KB) 129249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_FLAGS_HARD _PAGE_EXT(_PAGE_EXT_ESZ2) 130249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# endif 131249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 132249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# if defined(CONFIG_PAGE_SIZE_4KB) 133249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_FLAGS_HARD _PAGE_SZ0 134249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_PAGE_SIZE_64KB) 135249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_FLAGS_HARD _PAGE_SZ1 136249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# endif 137249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 138249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 139249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#if defined(CONFIG_X2TLB) 140249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) 141249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_EXT_ESZ2) 142249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K) 143249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_EXT_ESZ0 | _PAGE_EXT_ESZ2) 144249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) 145249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_EXT_ESZ0 | _PAGE_EXT_ESZ1 | _PAGE_EXT_ESZ2) 146249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB) 147249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_EXT_ESZ3) 148249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB) 149249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_EXT_ESZ2 | _PAGE_EXT_ESZ3) 150249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# endif 151046581f9623b53f551a93864bb74e15ad2514f0cPaul Mundt# define _PAGE_WIRED (_PAGE_EXT(_PAGE_EXT_WIRED)) 152249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 153249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# if defined(CONFIG_HUGETLB_PAGE_SIZE_64K) 154249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_SZ1) 155249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB) 156249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_SZ0 | _PAGE_SZ1) 157249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# endif 158046581f9623b53f551a93864bb74e15ad2514f0cPaul Mundt# define _PAGE_WIRED (0) 159249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 160249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 161249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 162249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Stub out _PAGE_SZHUGE if we don't have a good definition for it, 163249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * to make pte_mkhuge() happy. 164249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 165249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifndef _PAGE_SZHUGE 166249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt# define _PAGE_SZHUGE (_PAGE_FLAGS_HARD) 167249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 168249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 169c0b96cf639aa1bfa8983f734d4225091aa813e00Paul Mundt/* 17025985edcedea6396277003854657b5f3cb31a628Lucas De Marchi * Mask of bits that are to be preserved across pgprot changes. 171c0b96cf639aa1bfa8983f734d4225091aa813e00Paul Mundt */ 172249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define _PAGE_CHG_MASK \ 173c0b96cf639aa1bfa8983f734d4225091aa813e00Paul Mundt (PTE_MASK | _PAGE_ACCESSED | _PAGE_CACHABLE | \ 174c0b96cf639aa1bfa8983f734d4225091aa813e00Paul Mundt _PAGE_DIRTY | _PAGE_SPECIAL) 175249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 176249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifndef __ASSEMBLY__ 177249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 178249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#if defined(CONFIG_X2TLB) /* SH-X2 TLB */ 179249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE | \ 180249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD) 181249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 182249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \ 183249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \ 184249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \ 185249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_WRITE | \ 186249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_READ | \ 187249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_WRITE)) 188249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 189249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_EXECREAD __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \ 190249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \ 191249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_EXEC | \ 192249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_READ | \ 193249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_EXEC | \ 194249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_READ)) 195249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 196249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_COPY PAGE_EXECREAD 197249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 198249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \ 199249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \ 200249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \ 201249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_READ)) 202249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 203249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_WRITEONLY __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \ 204249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \ 205249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_WRITE | \ 206249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_WRITE)) 207249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 208249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | \ 209249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_CACHABLE | _PAGE_FLAGS_HARD | \ 210249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_WRITE | \ 211249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_READ | \ 212249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_EXEC | \ 213249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_WRITE | \ 214249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_READ | \ 215249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_USER_EXEC)) 216249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 217249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \ 218249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \ 219249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD | \ 220249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \ 221249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_WRITE | \ 222249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_EXEC)) 223249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 224249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_NOCACHE \ 225249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt __pgprot(_PAGE_PRESENT | _PAGE_DIRTY | \ 226249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_ACCESSED | _PAGE_HW_SHARED | \ 227249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_FLAGS_HARD | \ 228249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \ 229249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_WRITE | \ 230249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_EXEC)) 231249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 232249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \ 233249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \ 234249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD | \ 235249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT(_PAGE_EXT_KERN_READ | \ 236249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_EXT_KERN_EXEC)) 237249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 238249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_PCC(slot, type) \ 23911e1ed6e88616be5489a43bc6297d9bb8464908bPaul Mundt __pgprot(0) 240249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 241249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#elif defined(CONFIG_MMU) /* SH-X TLB */ 242249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_CACHABLE | \ 243249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD) 244249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 245249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ 246249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_CACHABLE | _PAGE_ACCESSED | \ 247249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_FLAGS_HARD) 248249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 249249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | \ 250249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD) 251249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 252249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_CACHABLE | \ 253249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD) 254249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 255249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_EXECREAD PAGE_READONLY 256249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_RWX PAGE_SHARED 257249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_WRITEONLY PAGE_SHARED 258249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 259249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_CACHABLE | \ 260249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \ 261249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD) 262249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 263249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_NOCACHE \ 264249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \ 265249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_ACCESSED | _PAGE_HW_SHARED | \ 266249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_FLAGS_HARD) 267249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 268249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_CACHABLE | \ 269249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_DIRTY | _PAGE_ACCESSED | \ 270249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_HW_SHARED | _PAGE_FLAGS_HARD) 271249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 272249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_PCC(slot, type) \ 273249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \ 274249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt _PAGE_ACCESSED | _PAGE_FLAGS_HARD | \ 275249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt (slot ? _PAGE_PCC_AREA5 : _PAGE_PCC_AREA6) | \ 276249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt (type)) 277249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else /* no mmu */ 278249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_NONE __pgprot(0) 279249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_SHARED __pgprot(0) 280249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_COPY __pgprot(0) 281249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_EXECREAD __pgprot(0) 282249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_RWX __pgprot(0) 283249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_READONLY __pgprot(0) 284249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_WRITEONLY __pgprot(0) 285249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL __pgprot(0) 286249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_NOCACHE __pgprot(0) 287249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_RO __pgprot(0) 288249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 289249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PAGE_KERNEL_PCC(slot, type) \ 290249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt __pgprot(0) 291249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 292249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 293249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif /* __ASSEMBLY__ */ 294249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 295249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifndef __ASSEMBLY__ 296249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 297249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 298249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Certain architectures need to do special things when PTEs 299249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * within a page table are directly modified. Thus, the following 300249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * hook is made available. 301249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 302249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifdef CONFIG_X2TLB 303249cfea914002baac0af4b080306e6b820cd86b2Paul Mundtstatic inline void set_pte(pte_t *ptep, pte_t pte) 304249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt{ 305249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt ptep->pte_high = pte.pte_high; 306249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt smp_wmb(); 307249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt ptep->pte_low = pte.pte_low; 308249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt} 309249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 310249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define set_pte(pteptr, pteval) (*(pteptr) = pteval) 311249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 312249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 313249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) 314249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 315249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 316249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * (pmds are folded into pgds so this doesn't get actually called, 317249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * but the define is needed for a generic inline function.) 318249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 319249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval) 320249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 321249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pfn_pte(pfn, prot) \ 322249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt __pte(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) 323249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pfn_pmd(pfn, prot) \ 324249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt __pmd(((unsigned long long)(pfn) << PAGE_SHIFT) | pgprot_val(prot)) 325249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 326249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_none(x) (!pte_val(x)) 327249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_present(x) ((x).pte_low & (_PAGE_PRESENT | _PAGE_PROTNONE)) 328249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 329249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) 330249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 331249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pmd_none(x) (!pmd_val(x)) 332249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pmd_present(x) (pmd_val(x)) 333249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) 334249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK) 335249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 336249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) 337249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_page(x) pfn_to_page(pte_pfn(x)) 338249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 339249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 340249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * The following only work if pte_present() is true. 341249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Undefined behaviour if not.. 342249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 343249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_not_present(pte) (!((pte).pte_low & _PAGE_PRESENT)) 344249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_dirty(pte) ((pte).pte_low & _PAGE_DIRTY) 345249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_young(pte) ((pte).pte_low & _PAGE_ACCESSED) 346249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_file(pte) ((pte).pte_low & _PAGE_FILE) 347c0b96cf639aa1bfa8983f734d4225091aa813e00Paul Mundt#define pte_special(pte) ((pte).pte_low & _PAGE_SPECIAL) 348249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 349249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifdef CONFIG_X2TLB 350fcb4ebd678858850e8b029909064175cb627868dMatt Fleming#define pte_write(pte) \ 351fcb4ebd678858850e8b029909064175cb627868dMatt Fleming ((pte).pte_high & (_PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE)) 352249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 353249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_write(pte) ((pte).pte_low & _PAGE_RW) 354249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 355249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 356249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PTE_BIT_FUNC(h,fn,op) \ 357249cfea914002baac0af4b080306e6b820cd86b2Paul Mundtstatic inline pte_t pte_##fn(pte_t pte) { pte.pte_##h op; return pte; } 358249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 359249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifdef CONFIG_X2TLB 360249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 361249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * We cheat a bit in the SH-X2 TLB case. As the permission bits are 362249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * individually toggled (and user permissions are entirely decoupled from 363249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * kernel permissions), we attempt to couple them a bit more sanely here. 364249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 365fcb4ebd678858850e8b029909064175cb627868dMatt FlemingPTE_BIT_FUNC(high, wrprotect, &= ~(_PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE)); 366249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(high, mkwrite, |= _PAGE_EXT_USER_WRITE | _PAGE_EXT_KERN_WRITE); 367249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(high, mkhuge, |= _PAGE_SZHUGE); 368249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 369249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(low, wrprotect, &= ~_PAGE_RW); 370249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(low, mkwrite, |= _PAGE_RW); 371249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(low, mkhuge, |= _PAGE_SZHUGE); 372249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 373249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 374249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(low, mkclean, &= ~_PAGE_DIRTY); 375249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(low, mkdirty, |= _PAGE_DIRTY); 376249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(low, mkold, &= ~_PAGE_ACCESSED); 377249cfea914002baac0af4b080306e6b820cd86b2Paul MundtPTE_BIT_FUNC(low, mkyoung, |= _PAGE_ACCESSED); 378c0b96cf639aa1bfa8983f734d4225091aa813e00Paul MundtPTE_BIT_FUNC(low, mkspecial, |= _PAGE_SPECIAL); 379249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 380249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 381249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Macro and implementation to make a page protection as uncachable. 382249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 383249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgprot_writecombine(prot) \ 384249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt __pgprot(pgprot_val(prot) & ~_PAGE_CACHABLE) 385249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 386249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgprot_noncached pgprot_writecombine 387249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 388249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 389249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Conversion functions: convert a page and protection to a page entry, 390249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * and a page entry and page directory to the page they refer to. 391249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 392249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * extern pte_t mk_pte(struct page *page, pgprot_t pgprot) 393249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 394249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) 395249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 396249cfea914002baac0af4b080306e6b820cd86b2Paul Mundtstatic inline pte_t pte_modify(pte_t pte, pgprot_t newprot) 397249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt{ 398249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt pte.pte_low &= _PAGE_CHG_MASK; 399249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt pte.pte_low |= pgprot_val(newprot); 400249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 401249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifdef CONFIG_X2TLB 402249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt pte.pte_high |= pgprot_val(newprot) >> 32; 403249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 404249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 405249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt return pte; 406249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt} 407249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 408249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pmd_page_vaddr(pmd) ((unsigned long)pmd_val(pmd)) 409249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pmd_page(pmd) (virt_to_page(pmd_val(pmd))) 410249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 411249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* to find an entry in a page-table-directory. */ 412249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) 4130906a3ad33a254094fb74828e3ddb9af8771a6daPaul Mundt#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) 4140906a3ad33a254094fb74828e3ddb9af8771a6daPaul Mundt#define __pgd_offset(address) pgd_index(address) 415249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 416249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* to find an entry in a kernel page-table-directory */ 417249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgd_offset_k(address) pgd_offset(&init_mm, address) 418249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 4190906a3ad33a254094fb74828e3ddb9af8771a6daPaul Mundt#define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) 4200906a3ad33a254094fb74828e3ddb9af8771a6daPaul Mundt#define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) 4210906a3ad33a254094fb74828e3ddb9af8771a6daPaul Mundt 422249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* Find an entry in the third-level page table.. */ 423249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_index(address) ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) 4240906a3ad33a254094fb74828e3ddb9af8771a6daPaul Mundt#define __pte_offset(address) pte_index(address) 4250906a3ad33a254094fb74828e3ddb9af8771a6daPaul Mundt 426249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_offset_kernel(dir, address) \ 427249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address)) 428249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_offset_map(dir, address) pte_offset_kernel(dir, address) 429249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_unmap(pte) do { } while (0) 430249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 431249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifdef CONFIG_X2TLB 432249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_ERROR(e) \ 433249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt printk("%s:%d: bad pte %p(%08lx%08lx).\n", __FILE__, __LINE__, \ 434249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt &(e), (e).pte_high, (e).pte_low) 435249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgd_ERROR(e) \ 436249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt printk("%s:%d: bad pgd %016llx.\n", __FILE__, __LINE__, pgd_val(e)) 437249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 438249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_ERROR(e) \ 439249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e)) 440249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgd_ERROR(e) \ 441249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e)) 442249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 443249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 444249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 445249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Encode and de-code a swap entry 446249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 447249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Constraints: 448249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * _PAGE_FILE at bit 0 449249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * _PAGE_PRESENT at bit 8 450249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * _PAGE_PROTNONE at bit 9 451249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 452249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * For the normal case, we encode the swap type into bits 0:7 and the 453249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * swap offset into bits 10:30. For the 64-bit PTE case, we keep the 454249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * preserved bits in the low 32-bits and use the upper 32 as the swap 455249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * offset (along with a 5-bit type), following the same approach as x86 456249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * PAE. This keeps the logic quite simple, and allows for a full 32 457249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * PTE_FILE_MAX_BITS, as opposed to the 29-bits we're constrained with 458249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * in the pte_low case. 459249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 460249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * As is evident by the Alpha code, if we ever get a 64-bit unsigned 461249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * long (swp_entry_t) to match up with the 64-bit PTEs, this all becomes 462249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * much cleaner.. 463249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * 464249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * NOTE: We should set ZEROs at the position of _PAGE_PRESENT 465249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * and _PAGE_PROTNONE bits 466249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 467249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#ifdef CONFIG_X2TLB 468249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_type(x) ((x).val & 0x1f) 469249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_offset(x) ((x).val >> 5) 470249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_entry(type, offset) ((swp_entry_t){ (type) | (offset) << 5}) 471249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high }) 472249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val }) 473249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 474249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 475249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Encode and decode a nonlinear file mapping entry 476249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 477249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_to_pgoff(pte) ((pte).pte_high) 478249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) }) 479249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 480249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PTE_FILE_MAX_BITS 32 481249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#else 482249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_type(x) ((x).val & 0xff) 483249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_offset(x) ((x).val >> 10) 484249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) <<10}) 485249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 486249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 1 }) 487249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 1 }) 488249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 489249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt/* 490249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt * Encode and decode a nonlinear file mapping entry 491249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt */ 492249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define PTE_FILE_MAX_BITS 29 493249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pte_to_pgoff(pte) (pte_val(pte) >> 1) 494249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#define pgoff_to_pte(off) ((pte_t) { ((off) << 1) | _PAGE_FILE }) 495249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif 496249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt 497249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif /* __ASSEMBLY__ */ 498249cfea914002baac0af4b080306e6b820cd86b2Paul Mundt#endif /* __ASM_SH_PGTABLE_32_H */ 499