pte.h revision 183290
1/*- 2 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 3 * Copyright (C) 1995, 1996 TooLs GmbH. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by TooLs GmbH. 17 * 4. The name of TooLs GmbH may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * $NetBSD: pte.h,v 1.2 1998/08/31 14:43:40 tsubai Exp $ 32 * $FreeBSD: head/sys/powerpc/include/pte.h 183290 2008-09-23 03:02:57Z nwhitehorn $ 33 */ 34 35#ifndef _MACHINE_PTE_H_ 36#define _MACHINE_PTE_H_ 37 38#if defined(AIM) 39 40/* 41 * Page Table Entries 42 */ 43#ifndef LOCORE 44 45/* 32-bit PTE */ 46struct pte { 47 u_int32_t pte_hi; 48 u_int32_t pte_lo; 49}; 50 51struct pteg { 52 struct pte pt[8]; 53}; 54 55/* 64-bit (long) PTE */ 56struct lpte { 57 u_int64_t pte_hi; 58 u_int64_t pte_lo; 59}; 60 61struct lpteg { 62 struct lpte pt[8]; 63}; 64 65#endif /* LOCORE */ 66 67/* 32-bit PTE definitions */ 68 69/* High word: */ 70#define PTE_VALID 0x80000000 71#define PTE_VSID_SHFT 7 72#define PTE_HID 0x00000040 73#define PTE_API 0x0000003f 74/* Low word: */ 75#define PTE_RPGN 0xfffff000 76#define PTE_REF 0x00000100 77#define PTE_CHG 0x00000080 78#define PTE_WIMG 0x00000078 79#define PTE_W 0x00000040 80#define PTE_I 0x00000020 81#define PTE_M 0x00000010 82#define PTE_G 0x00000008 83#define PTE_PP 0x00000003 84#define PTE_SO 0x00000000 /* Super. Only (U: XX, S: RW) */ 85#define PTE_SW 0x00000001 /* Super. Write-Only (U: RO, S: RW) */ 86#define PTE_BW 0x00000002 /* Supervisor (U: RW, S: RW) */ 87#define PTE_BR 0x00000003 /* Both Read Only (U: RO, S: RO) */ 88#define PTE_RW PTE_BW 89#define PTE_RO PTE_BR 90 91#define PTE_EXEC 0x00000200 /* pseudo bit in attrs; page is exec */ 92 93/* 64-bit PTE definitions */ 94 95/* High quadword: */ 96#define LPTE_VSID_SHIFT 12 97#define LPTE_API 0x0000000000000F80ULL 98#define LPTE_BIG 0x0000000000000004ULL /* 4kb/16Mb page */ 99#define LPTE_HID 0x0000000000000002ULL 100#define LPTE_VALID 0x0000000000000001ULL 101 102/* Low quadword: */ 103#define EXTEND_PTE(x) UINT64_C(x) /* make constants 64-bit */ 104#define LPTE_RPGN 0xfffffffffffff000ULL 105#define LPTE_REF EXTEND_PTE( PTE_REF ) 106#define LPTE_CHG EXTEND_PTE( PTE_CHG ) 107#define LPTE_WIMG EXTEND_PTE( PTE_WIMG ) 108#define LPTE_W EXTEND_PTE( PTE_W ) 109#define LPTE_I EXTEND_PTE( PTE_I ) 110#define LPTE_M EXTEND_PTE( PTE_M ) 111#define LPTE_G EXTEND_PTE( PTE_G ) 112#define LPTE_NOEXEC 0x0000000000000004ULL 113#define LPTE_PP EXTEND_PTE( PTE_PP ) 114 115#define LPTE_SO EXTEND_PTE( PTE_SO ) /* Super. Only */ 116#define LPTE_SW EXTEND_PTE( PTE_SW ) /* Super. Write-Only */ 117#define LPTE_BW EXTEND_PTE( PTE_BW ) /* Supervisor */ 118#define LPTE_BR EXTEND_PTE( PTE_BR ) /* Both Read Only */ 119#define LPTE_RW LPTE_BW 120#define LPTE_RO LPTE_BR 121 122#ifndef LOCORE 123typedef struct pte pte_t; 124typedef struct lpte lpte_t; 125#endif /* LOCORE */ 126 127/* 128 * Extract bits from address 129 */ 130#define ADDR_SR_SHFT 28 131#define ADDR_PIDX 0x0ffff000 132#define ADDR_PIDX_SHFT 12 133#define ADDR_API_SHFT 22 134#define ADDR_API_SHFT64 16 135#define ADDR_POFF 0x00000fff 136 137/* 138 * Bits in DSISR: 139 */ 140#define DSISR_DIRECT 0x80000000 141#define DSISR_NOTFOUND 0x40000000 142#define DSISR_PROTECT 0x08000000 143#define DSISR_INVRX 0x04000000 144#define DSISR_STORE 0x02000000 145#define DSISR_DABR 0x00400000 146#define DSISR_SEGMENT 0x00200000 147#define DSISR_EAR 0x00100000 148 149/* 150 * Bits in SRR1 on ISI: 151 */ 152#define ISSRR1_NOTFOUND 0x40000000 153#define ISSRR1_DIRECT 0x10000000 154#define ISSRR1_PROTECT 0x08000000 155#define ISSRR1_SEGMENT 0x00200000 156 157#ifdef _KERNEL 158#ifndef LOCORE 159extern u_int dsisr(void); 160#endif /* _KERNEL */ 161#endif /* LOCORE */ 162 163#else 164 165#include <machine/tlb.h> 166 167/* 168 * 1st level - page table directory (pdir) 169 * 170 * pdir consists of 1024 entries, each being a pointer to 171 * second level entity, i.e. the actual page table (ptbl). 172 */ 173#define PDIR_SHIFT 22 174#define PDIR_SIZE (1 << PDIR_SHIFT) /* va range mapped by pdir */ 175#define PDIR_MASK (~(PDIR_SIZE - 1)) 176#define PDIR_NENTRIES 1024 /* number of page tables in pdir */ 177 178/* Returns pdir entry number for given va */ 179#define PDIR_IDX(va) ((va) >> PDIR_SHIFT) 180 181#define PDIR_ENTRY_SHIFT 2 /* entry size is 2^2 = 4 bytes */ 182 183/* 184 * 2nd level - page table (ptbl) 185 * 186 * Page table covers 1024 page table entries. Page 187 * table entry (pte) is 32 bit wide and defines mapping 188 * for a single page. 189 */ 190#define PTBL_SHIFT PAGE_SHIFT 191#define PTBL_SIZE PAGE_SIZE /* va range mapped by ptbl entry */ 192#define PTBL_MASK ((PDIR_SIZE - 1) & ~PAGE_MASK) 193#define PTBL_NENTRIES 1024 /* number of pages mapped by ptbl */ 194 195/* Returns ptbl entry number for given va */ 196#define PTBL_IDX(va) (((va) & PTBL_MASK) >> PTBL_SHIFT) 197 198/* Size of ptbl in pages, 1024 entries, each sizeof(struct pte_entry). */ 199#define PTBL_PAGES 2 200#define PTBL_ENTRY_SHIFT 3 /* entry size is 2^3 = 8 bytes */ 201 202/* 203 * Flags for pte_remove() routine. 204 */ 205#define PTBL_HOLD 0x00000001 /* do not unhold ptbl pages */ 206#define PTBL_UNHOLD 0x00000002 /* unhold and attempt to free ptbl pages */ 207 208#define PTBL_HOLD_FLAG(pmap) (((pmap) == kernel_pmap) ? PTBL_HOLD : PTBL_UNHOLD) 209 210/* 211 * Page Table Entry definitions and macros. 212 */ 213#ifndef LOCORE 214struct pte_entry { 215 vm_offset_t rpn; 216 u_int32_t flags; 217}; 218typedef struct pte_entry pte_t; 219#endif 220 221/* RPN mask, TLB0 4K pages */ 222#define PTE_PA_MASK PAGE_MASK 223 224/* PTE bits assigned to MAS2, MAS3 flags */ 225#define PTE_W MAS2_W 226#define PTE_I MAS2_I 227#define PTE_M MAS2_M 228#define PTE_G MAS2_G 229#define PTE_MAS2_MASK (MAS2_G | MAS2_M | MAS2_I | MAS2_W) 230 231#define PTE_MAS3_SHIFT 8 232#define PTE_UX (MAS3_UX << PTE_MAS3_SHIFT) 233#define PTE_SX (MAS3_SX << PTE_MAS3_SHIFT) 234#define PTE_UW (MAS3_UW << PTE_MAS3_SHIFT) 235#define PTE_SW (MAS3_SW << PTE_MAS3_SHIFT) 236#define PTE_UR (MAS3_UR << PTE_MAS3_SHIFT) 237#define PTE_SR (MAS3_SR << PTE_MAS3_SHIFT) 238#define PTE_MAS3_MASK ((MAS3_UX | MAS3_SX | MAS3_UW \ 239 | MAS3_SW | MAS3_UR | MAS3_SR) << PTE_MAS3_SHIFT) 240 241/* Other PTE flags */ 242#define PTE_VALID 0x80000000 /* Valid */ 243#define PTE_MODIFIED 0x40000000 /* Modified */ 244#define PTE_WIRED 0x20000000 /* Wired */ 245#define PTE_MANAGED 0x10000000 /* Managed */ 246#define PTE_FAKE 0x08000000 /* Ficticious */ 247#define PTE_REFERENCED 0x04000000 /* Referenced */ 248 249/* Macro argument must of pte_t type. */ 250#define PTE_PA(pte) ((pte)->rpn & ~PTE_PA_MASK) 251#define PTE_ISVALID(pte) ((pte)->flags & PTE_VALID) 252#define PTE_ISWIRED(pte) ((pte)->flags & PTE_WIRED) 253#define PTE_ISMANAGED(pte) ((pte)->flags & PTE_MANAGED) 254#define PTE_ISFAKE(pte) ((pte)->flags & PTE_FAKE) 255#define PTE_ISMODIFIED(pte) ((pte)->flags & PTE_MODIFIED) 256#define PTE_ISREFERENCED(pte) ((pte)->flags & PTE_REFERENCED) 257 258#endif /* #elif defined(E500) */ 259 260#endif /* _MACHINE_PTE_H_ */ 261