2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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.
31 * $NetBSD: pte.h,v 1.2 1998/08/31 14:43:40 tsubai Exp $
35 #ifndef _MACHINE_PTE_H_
36 #define _MACHINE_PTE_H_
55 /* 64-bit (long) PTE */
67 /* 32-bit PTE definitions */
70 #define PTE_VALID 0x80000000
71 #define PTE_VSID_SHFT 7
72 #define PTE_HID 0x00000040
73 #define PTE_API 0x0000003f
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) */
91 #define PTE_EXEC 0x00000200 /* pseudo bit in attrs; page is exec */
93 /* 64-bit PTE definitions */
96 #define LPTE_VSID_SHIFT 12
97 #define LPTE_API 0x0000000000000F80ULL
98 #define LPTE_LOCKED 0x0000000000000008ULL
99 #define LPTE_BIG 0x0000000000000004ULL /* 4kb/16Mb page */
100 #define LPTE_HID 0x0000000000000002ULL
101 #define LPTE_VALID 0x0000000000000001ULL
104 #define EXTEND_PTE(x) UINT64_C(x) /* make constants 64-bit */
105 #define LPTE_RPGN 0xfffffffffffff000ULL
106 #define LPTE_REF EXTEND_PTE( PTE_REF )
107 #define LPTE_CHG EXTEND_PTE( PTE_CHG )
108 #define LPTE_WIMG EXTEND_PTE( PTE_WIMG )
109 #define LPTE_W EXTEND_PTE( PTE_W )
110 #define LPTE_I EXTEND_PTE( PTE_I )
111 #define LPTE_M EXTEND_PTE( PTE_M )
112 #define LPTE_G EXTEND_PTE( PTE_G )
113 #define LPTE_NOEXEC 0x0000000000000004ULL
114 #define LPTE_PP EXTEND_PTE( PTE_PP )
116 #define LPTE_SO EXTEND_PTE( PTE_SO ) /* Super. Only */
117 #define LPTE_SW EXTEND_PTE( PTE_SW ) /* Super. Write-Only */
118 #define LPTE_BW EXTEND_PTE( PTE_BW ) /* Supervisor */
119 #define LPTE_BR EXTEND_PTE( PTE_BR ) /* Both Read Only */
120 #define LPTE_RW LPTE_BW
121 #define LPTE_RO LPTE_BR
124 typedef struct pte pte_t;
125 typedef struct lpte lpte_t;
129 * Extract bits from address
131 #define ADDR_SR_SHFT 28
132 #define ADDR_PIDX 0x0ffff000
133 #define ADDR_PIDX_SHFT 12
134 #define ADDR_API_SHFT 22
135 #define ADDR_API_SHFT64 16
136 #define ADDR_POFF 0x00000fff
141 #define DSISR_DIRECT 0x80000000
142 #define DSISR_NOTFOUND 0x40000000
143 #define DSISR_PROTECT 0x08000000
144 #define DSISR_INVRX 0x04000000
145 #define DSISR_STORE 0x02000000
146 #define DSISR_DABR 0x00400000
147 #define DSISR_SEGMENT 0x00200000
148 #define DSISR_EAR 0x00100000
151 * Bits in SRR1 on ISI:
153 #define ISSRR1_NOTFOUND 0x40000000
154 #define ISSRR1_DIRECT 0x10000000
155 #define ISSRR1_PROTECT 0x08000000
156 #define ISSRR1_SEGMENT 0x00200000
160 extern u_int dsisr(void);
166 #include <machine/tlb.h>
169 * 1st level - page table directory (pdir)
171 * pdir consists of 1024 entries, each being a pointer to
172 * second level entity, i.e. the actual page table (ptbl).
174 #define PDIR_SHIFT 22
175 #define PDIR_SIZE (1 << PDIR_SHIFT) /* va range mapped by pdir */
176 #define PDIR_MASK (~(PDIR_SIZE - 1))
177 #define PDIR_NENTRIES 1024 /* number of page tables in pdir */
179 /* Returns pdir entry number for given va */
180 #define PDIR_IDX(va) ((va) >> PDIR_SHIFT)
182 #define PDIR_ENTRY_SHIFT 2 /* entry size is 2^2 = 4 bytes */
185 * 2nd level - page table (ptbl)
187 * Page table covers 1024 page table entries. Page
188 * table entry (pte) is 32 bit wide and defines mapping
191 #define PTBL_SHIFT PAGE_SHIFT
192 #define PTBL_SIZE PAGE_SIZE /* va range mapped by ptbl entry */
193 #define PTBL_MASK ((PDIR_SIZE - 1) & ~PAGE_MASK)
194 #define PTBL_NENTRIES 1024 /* number of pages mapped by ptbl */
196 /* Returns ptbl entry number for given va */
197 #define PTBL_IDX(va) (((va) & PTBL_MASK) >> PTBL_SHIFT)
199 /* Size of ptbl in pages, 1024 entries, each sizeof(struct pte_entry). */
201 #define PTBL_ENTRY_SHIFT 3 /* entry size is 2^3 = 8 bytes */
204 * Flags for pte_remove() routine.
206 #define PTBL_HOLD 0x00000001 /* do not unhold ptbl pages */
207 #define PTBL_UNHOLD 0x00000002 /* unhold and attempt to free ptbl pages */
209 #define PTBL_HOLD_FLAG(pmap) (((pmap) == kernel_pmap) ? PTBL_HOLD : PTBL_UNHOLD)
212 * Page Table Entry definitions and macros.
219 typedef struct pte pte_t;
222 /* RPN mask, TLB0 4K pages */
223 #define PTE_PA_MASK PAGE_MASK
225 /* PTE bits assigned to MAS2, MAS3 flags */
230 #define PTE_MAS2_MASK (MAS2_G | MAS2_M | MAS2_I | MAS2_W)
232 #define PTE_MAS3_SHIFT 8
233 #define PTE_UX (MAS3_UX << PTE_MAS3_SHIFT)
234 #define PTE_SX (MAS3_SX << PTE_MAS3_SHIFT)
235 #define PTE_UW (MAS3_UW << PTE_MAS3_SHIFT)
236 #define PTE_SW (MAS3_SW << PTE_MAS3_SHIFT)
237 #define PTE_UR (MAS3_UR << PTE_MAS3_SHIFT)
238 #define PTE_SR (MAS3_SR << PTE_MAS3_SHIFT)
239 #define PTE_MAS3_MASK ((MAS3_UX | MAS3_SX | MAS3_UW \
240 | MAS3_SW | MAS3_UR | MAS3_SR) << PTE_MAS3_SHIFT)
242 /* Other PTE flags */
243 #define PTE_VALID 0x80000000 /* Valid */
244 #define PTE_MODIFIED 0x40000000 /* Modified */
245 #define PTE_WIRED 0x20000000 /* Wired */
246 #define PTE_MANAGED 0x10000000 /* Managed */
247 #define PTE_REFERENCED 0x04000000 /* Referenced */
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_ISMODIFIED(pte) ((pte)->flags & PTE_MODIFIED)
255 #define PTE_ISREFERENCED(pte) ((pte)->flags & PTE_REFERENCED)
257 #endif /* #elif defined(E500) */
259 #endif /* _MACHINE_PTE_H_ */