1 /* $NetBSD: pmap.h,v 1.28 2014/02/28 05:32:01 matt Exp $ */
2
3 /*-
4 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
5 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by TooLs GmbH.
19 * 4. The name of TooLs GmbH may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #ifndef _POWERPC_OEA_PMAP_H_
35 #define _POWERPC_OEA_PMAP_H_
36
37 #ifdef _LOCORE
38 #error use assym.h instead
39 #endif
40
41 #if defined(_LKM) || defined(_MODULE)
42 #error this file should not be included by loadable kernel modules
43 #endif
44
45 #ifdef _KERNEL_OPT
46 #include "opt_ppcarch.h"
47 #endif
48 #include <powerpc/oea/pte.h>
49
50 /*
51 * Pmap stuff
52 */
53 struct pmap {
54 #ifdef PPC_OEA64
55 struct steg *pm_steg_table; /* segment table pointer */
56 /* XXX need way to track exec pages */
57 #endif
58
59 #if defined(PPC_OEA) || defined (PPC_OEA64_BRIDGE)
60 register_t pm_sr[16]; /* segments used in this pmap */
61 int pm_exec[16]; /* counts of exec mappings */
62 #endif
63 register_t pm_vsid; /* VSID bits */
64 int pm_refs; /* ref count */
65 struct pmap_statistics pm_stats; /* pmap statistics */
66 unsigned int pm_evictions; /* pvo's not in page table */
67
68 #ifdef PPC_OEA64
69 unsigned int pm_ste_evictions;
70 #endif
71 };
72
73 struct pmap_ops {
74 int (*pmapop_pte_spill)(struct pmap *, vaddr_t, bool);
75 void (*pmapop_real_memory)(paddr_t *, psize_t *);
76 void (*pmapop_init)(void);
77 void (*pmapop_virtual_space)(vaddr_t *, vaddr_t *);
78 pmap_t (*pmapop_create)(void);
79 void (*pmapop_reference)(pmap_t);
80 void (*pmapop_destroy)(pmap_t);
81 void (*pmapop_copy)(pmap_t, pmap_t, vaddr_t, vsize_t, vaddr_t);
82 void (*pmapop_update)(pmap_t);
83 int (*pmapop_enter)(pmap_t, vaddr_t, paddr_t, vm_prot_t, u_int);
84 void (*pmapop_remove)(pmap_t, vaddr_t, vaddr_t);
85 void (*pmapop_kenter_pa)(vaddr_t, paddr_t, vm_prot_t, u_int);
86 void (*pmapop_kremove)(vaddr_t, vsize_t);
87 bool (*pmapop_extract)(pmap_t, vaddr_t, paddr_t *);
88
89 void (*pmapop_protect)(pmap_t, vaddr_t, vaddr_t, vm_prot_t);
90 void (*pmapop_unwire)(pmap_t, vaddr_t);
91 void (*pmapop_page_protect)(struct vm_page *, vm_prot_t);
92 bool (*pmapop_query_bit)(struct vm_page *, int);
93 bool (*pmapop_clear_bit)(struct vm_page *, int);
94
95 void (*pmapop_activate)(struct lwp *);
96 void (*pmapop_deactivate)(struct lwp *);
97
98 void (*pmapop_pinit)(pmap_t);
99 void (*pmapop_procwr)(struct proc *, vaddr_t, size_t);
100
101 void (*pmapop_pte_print)(volatile struct pte *);
102 void (*pmapop_pteg_check)(void);
103 void (*pmapop_print_mmuregs)(void);
104 void (*pmapop_print_pte)(pmap_t, vaddr_t);
105 void (*pmapop_pteg_dist)(void);
106 void (*pmapop_pvo_verify)(void);
107 vaddr_t (*pmapop_steal_memory)(vsize_t, vaddr_t *, vaddr_t *);
108 void (*pmapop_bootstrap)(paddr_t, paddr_t);
109 };
110
111 #ifdef _KERNEL
112 #include <sys/cdefs.h>
113 __BEGIN_DECLS
114 #include <sys/param.h>
115 #include <sys/systm.h>
116
117 #if defined (PPC_OEA) || defined (PPC_OEA64_BRIDGE)
118 extern register_t iosrtable[];
119 #endif
120 extern int pmap_use_altivec;
121
122 #define pmap_clear_modify(pg) (pmap_clear_bit((pg), PTE_CHG))
123 #define pmap_clear_reference(pg) (pmap_clear_bit((pg), PTE_REF))
124 #define pmap_is_modified(pg) (pmap_query_bit((pg), PTE_CHG))
125 #define pmap_is_referenced(pg) (pmap_query_bit((pg), PTE_REF))
126
127 #define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
128 #define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
129
130 /* ARGSUSED */
131 static inline void
pmap_remove_all(struct pmap * pmap)132 pmap_remove_all(struct pmap *pmap)
133 {
134 /* Nothing. */
135 }
136
137 #if (defined(PPC_OEA) + defined(PPC_OEA64) + defined(PPC_OEA64_BRIDGE)) != 1
138 #define PMAP_NEEDS_FIXUP
139 #endif
140
141 extern volatile struct pteg *pmap_pteg_table;
142 extern unsigned int pmap_pteg_cnt;
143 extern unsigned int pmap_pteg_mask;
144
145 void pmap_bootstrap(vaddr_t, vaddr_t);
146 bool pmap_extract(pmap_t, vaddr_t, paddr_t *);
147 bool pmap_query_bit(struct vm_page *, int);
148 bool pmap_clear_bit(struct vm_page *, int);
149 void pmap_real_memory(paddr_t *, psize_t *);
150 void pmap_procwr(struct proc *, vaddr_t, size_t);
151 int pmap_pte_spill(pmap_t, vaddr_t, bool);
152 int pmap_ste_spill(pmap_t, vaddr_t, bool);
153 void pmap_pinit(pmap_t);
154
155 u_int powerpc_mmap_flags(paddr_t);
156 #define POWERPC_MMAP_FLAG_MASK 0xf
157 #define POWERPC_MMAP_FLAG_PREFETCHABLE 0x1
158 #define POWERPC_MMAP_FLAG_CACHEABLE 0x2
159
160 #define pmap_phys_address(ppn) (ppn & ~POWERPC_MMAP_FLAG_MASK)
161 #define pmap_mmap_flags(ppn) powerpc_mmap_flags(ppn)
162
163 static inline paddr_t vtophys (vaddr_t);
164
165 /*
166 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB.
167 *
168 * Note: This won't work if we have more memory than can be direct-mapped
169 * VA==PA all at once. But pmap_copy_page() and pmap_zero_page() will have
170 * this problem, too.
171 */
172 #if !defined(PPC_OEA64) && !defined (PPC_OEA64_BRIDGE)
173 #define PMAP_MAP_POOLPAGE(pa) (pa)
174 #define PMAP_UNMAP_POOLPAGE(pa) (pa)
175 #define POOL_VTOPHYS(va) vtophys((vaddr_t) va)
176 #endif
177
178 static inline paddr_t
vtophys(vaddr_t va)179 vtophys(vaddr_t va)
180 {
181 paddr_t pa;
182
183 if (pmap_extract(pmap_kernel(), va, &pa))
184 return pa;
185 KASSERTMSG(0, "vtophys: pmap_extract of %#"PRIxVADDR" failed", va);
186 return (paddr_t) -1;
187 }
188
189
190 #ifdef PMAP_NEEDS_FIXUP
191 extern const struct pmap_ops *pmapops;
192 extern const struct pmap_ops pmap32_ops;
193 extern const struct pmap_ops pmap64_ops;
194 extern const struct pmap_ops pmap64bridge_ops;
195
196 static inline void
pmap_setup32(void)197 pmap_setup32(void)
198 {
199 pmapops = &pmap32_ops;
200 }
201
202 static inline void
pmap_setup64(void)203 pmap_setup64(void)
204 {
205 pmapops = &pmap64_ops;
206 }
207
208 static inline void
pmap_setup64bridge(void)209 pmap_setup64bridge(void)
210 {
211 pmapops = &pmap64bridge_ops;
212 }
213 #endif
214
215 bool pmap_pageidlezero (paddr_t);
216 void pmap_syncicache (paddr_t, psize_t);
217 #ifdef PPC_OEA64
218 vaddr_t pmap_setusr (vaddr_t);
219 vaddr_t pmap_unsetusr (void);
220 #endif
221
222 #ifdef PPC_OEA64_BRIDGE
223 int pmap_setup_segment0_map(int use_large_pages, ...);
224 #endif
225
226 #define PMAP_MD_PREFETCHABLE 0x2000000
227 #define PMAP_STEAL_MEMORY
228 #define PMAP_NEED_PROCWR
229
230 void pmap_zero_page(paddr_t);
231 void pmap_copy_page(paddr_t, paddr_t);
232
233 LIST_HEAD(pvo_head, pvo_entry);
234
235 #define __HAVE_VM_PAGE_MD
236
237 struct vm_page_md {
238 unsigned int mdpg_attrs;
239 struct pvo_head mdpg_pvoh;
240 #ifdef MODULAR
241 uintptr_t mdpg_dummy[3];
242 #endif
243 };
244
245 #define VM_MDPAGE_INIT(pg) do { \
246 (pg)->mdpage.mdpg_attrs = 0; \
247 LIST_INIT(&(pg)->mdpage.mdpg_pvoh); \
248 } while (/*CONSTCOND*/0)
249
250 __END_DECLS
251 #endif /* _KERNEL */
252
253 #endif /* _POWERPC_OEA_PMAP_H_ */
254