pte.h revision 209975 
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 209975 2010-07-13 05:32:19Z 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_WIRED		0x0000000000000010ULL
99#define LPTE_LOCKED		0x0000000000000008ULL
100#define LPTE_BIG		0x0000000000000004ULL	/* 4kb/16Mb page */
101#define LPTE_HID		0x0000000000000002ULL
102#define LPTE_VALID		0x0000000000000001ULL
103
104/* Low quadword: */
105#define EXTEND_PTE(x)	UINT64_C(x)	/* make constants 64-bit */
106#define	LPTE_RPGN	0xfffffffffffff000ULL
107#define	LPTE_REF	EXTEND_PTE( PTE_REF )
108#define	LPTE_CHG	EXTEND_PTE( PTE_CHG )
109#define	LPTE_WIMG	EXTEND_PTE( PTE_WIMG )
110#define	LPTE_W		EXTEND_PTE( PTE_W )
111#define	LPTE_I		EXTEND_PTE( PTE_I )
112#define	LPTE_M		EXTEND_PTE( PTE_M )
113#define	LPTE_G		EXTEND_PTE( PTE_G )
114#define	LPTE_NOEXEC	0x0000000000000004ULL
115#define	LPTE_PP		EXTEND_PTE( PTE_PP )
116
117#define	LPTE_SO		EXTEND_PTE( PTE_SO )	/* Super. Only */
118#define	LPTE_SW		EXTEND_PTE( PTE_SW )	/* Super. Write-Only */
119#define	LPTE_BW		EXTEND_PTE( PTE_BW )	/* Supervisor */
120#define	LPTE_BR		EXTEND_PTE( PTE_BR )	/* Both Read Only */
121#define	LPTE_RW		LPTE_BW
122#define	LPTE_RO		LPTE_BR
123
124#ifndef	LOCORE
125typedef	struct pte pte_t;
126typedef	struct lpte lpte_t;
127#endif	/* LOCORE */
128
129/*
130 * Extract bits from address
131 */
132#define	ADDR_SR_SHFT	28
133#define	ADDR_PIDX	0x0ffff000UL
134#define	ADDR_PIDX_SHFT	12
135#define	ADDR_API_SHFT	22
136#define	ADDR_API_SHFT64	16
137#define	ADDR_POFF	0x00000fffUL
138
139/*
140 * Bits in DSISR:
141 */
142#define	DSISR_DIRECT	0x80000000
143#define	DSISR_NOTFOUND	0x40000000
144#define	DSISR_PROTECT	0x08000000
145#define	DSISR_INVRX	0x04000000
146#define	DSISR_STORE	0x02000000
147#define	DSISR_DABR	0x00400000
148#define	DSISR_SEGMENT	0x00200000
149#define	DSISR_EAR	0x00100000
150
151/*
152 * Bits in SRR1 on ISI:
153 */
154#define	ISSRR1_NOTFOUND	0x40000000
155#define	ISSRR1_DIRECT	0x10000000
156#define	ISSRR1_PROTECT	0x08000000
157#define	ISSRR1_SEGMENT	0x00200000
158
159#ifdef	_KERNEL
160#ifndef	LOCORE
161extern u_int dsisr(void);
162#endif	/* _KERNEL */
163#endif	/* LOCORE */
164
165#else
166
167#include <machine/tlb.h>
168
169/*
170 * 1st level - page table directory (pdir)
171 *
172 * pdir consists of 1024 entries, each being a pointer to
173 * second level entity, i.e. the actual page table (ptbl).
174 */
175#define PDIR_SHIFT	22
176#define PDIR_SIZE	(1 << PDIR_SHIFT)	/* va range mapped by pdir */
177#define PDIR_MASK	(~(PDIR_SIZE - 1))
178#define PDIR_NENTRIES	1024			/* number of page tables in pdir */
179
180/* Returns pdir entry number for given va */
181#define PDIR_IDX(va)	((va) >> PDIR_SHIFT)
182
183#define PDIR_ENTRY_SHIFT 2	/* entry size is 2^2 = 4 bytes */
184
185/*
186 * 2nd level - page table (ptbl)
187 *
188 * Page table covers 1024 page table entries. Page
189 * table entry (pte) is 32 bit wide and defines mapping
190 * for a single page.
191 */
192#define PTBL_SHIFT	PAGE_SHIFT
193#define PTBL_SIZE	PAGE_SIZE		/* va range mapped by ptbl entry */
194#define PTBL_MASK	((PDIR_SIZE - 1) & ~((1 << PAGE_SHIFT) - 1))
195#define PTBL_NENTRIES	1024			/* number of pages mapped by ptbl */
196
197/* Returns ptbl entry number for given va */
198#define PTBL_IDX(va)	(((va) & PTBL_MASK) >> PTBL_SHIFT)
199
200/* Size of ptbl in pages, 1024 entries, each sizeof(struct pte_entry). */
201#define PTBL_PAGES	2
202#define PTBL_ENTRY_SHIFT 3	/* entry size is 2^3 = 8 bytes */
203
204/*
205 * Flags for pte_remove() routine.
206 */
207#define PTBL_HOLD	0x00000001	/* do not unhold ptbl pages */
208#define PTBL_UNHOLD	0x00000002	/* unhold and attempt to free ptbl pages */
209
210#define PTBL_HOLD_FLAG(pmap)	(((pmap) == kernel_pmap) ? PTBL_HOLD : PTBL_UNHOLD)
211
212/*
213 * Page Table Entry definitions and macros.
214 */
215#ifndef	LOCORE
216struct pte {
217	vm_offset_t rpn;
218	uint32_t flags;
219};
220typedef struct pte pte_t;
221#endif
222
223/* RPN mask, TLB0 4K pages */
224#define PTE_PA_MASK	PAGE_MASK
225
226/* PTE bits assigned to MAS2, MAS3 flags */
227#define PTE_W		MAS2_W
228#define PTE_I		MAS2_I
229#define PTE_M		MAS2_M
230#define PTE_G		MAS2_G
231#define PTE_MAS2_MASK	(MAS2_G | MAS2_M | MAS2_I | MAS2_W)
232
233#define PTE_MAS3_SHIFT	8
234#define PTE_UX		(MAS3_UX << PTE_MAS3_SHIFT)
235#define PTE_SX		(MAS3_SX << PTE_MAS3_SHIFT)
236#define PTE_UW		(MAS3_UW << PTE_MAS3_SHIFT)
237#define PTE_SW		(MAS3_SW << PTE_MAS3_SHIFT)
238#define PTE_UR		(MAS3_UR << PTE_MAS3_SHIFT)
239#define PTE_SR		(MAS3_SR << PTE_MAS3_SHIFT)
240#define PTE_MAS3_MASK	((MAS3_UX | MAS3_SX | MAS3_UW	\
241			| MAS3_SW | MAS3_UR | MAS3_SR) << PTE_MAS3_SHIFT)
242
243/* Other PTE flags */
244#define PTE_VALID	0x80000000	/* Valid */
245#define PTE_MODIFIED	0x40000000	/* Modified */
246#define PTE_WIRED	0x20000000	/* Wired */
247#define PTE_MANAGED	0x10000000	/* Managed */
248#define PTE_REFERENCED	0x04000000	/* Referenced */
249
250/* Macro argument must of pte_t type. */
251#define PTE_PA(pte)		((pte)->rpn & ~PTE_PA_MASK)
252#define PTE_ISVALID(pte)	((pte)->flags & PTE_VALID)
253#define PTE_ISWIRED(pte)	((pte)->flags & PTE_WIRED)
254#define PTE_ISMANAGED(pte)	((pte)->flags & PTE_MANAGED)
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