1 /* $NetBSD: pmap.h,v 1.68 2016/07/11 16:15:35 matt Exp $ */
2
3 /*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ralph Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)pmap.h 8.1 (Berkeley) 6/10/93
35 */
36
37 /*
38 * Copyright (c) 1987 Carnegie-Mellon University
39 *
40 * This code is derived from software contributed to Berkeley by
41 * Ralph Campbell.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by the University of
54 * California, Berkeley and its contributors.
55 * 4. Neither the name of the University nor the names of its contributors
56 * may be used to endorse or promote products derived from this software
57 * without specific prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 * @(#)pmap.h 8.1 (Berkeley) 6/10/93
72 */
73
74 #ifndef _MIPS_PMAP_H_
75 #define _MIPS_PMAP_H_
76
77 #ifdef _KERNEL_OPT
78 #include "opt_multiprocessor.h"
79 #include "opt_uvmhist.h"
80 #endif
81
82 #include <sys/evcnt.h>
83 #include <sys/kcpuset.h>
84 #include <sys/kernhist.h>
85
86 #ifndef __BSD_PTENTRY_T__
87 #define __BSD_PTENTRY_T__
88 typedef uint32_t pt_entry_t;
89 #define PRIxPTE PRIx32
90 #endif /* __BSD_PTENTRY_T__ */
91
92 #define KERNEL_PID 0
93
94 #if defined(__PMAP_PRIVATE)
95
96 #include <mips/locore.h>
97 #include <mips/cache.h>
98
99 #define PMAP_VIRTUAL_CACHE_ALIASES
100 #define PMAP_INVALID_SEGTAB_ADDRESS ((pmap_segtab_t *)NULL)
101 #define PMAP_TLB_NEED_SHOOTDOWN
102 #define PMAP_TLB_FLUSH_ASID_ON_RESET false
103 #if UPAGES > 1
104 #define PMAP_TLB_WIRED_UPAGES MIPS3_TLB_WIRED_UPAGES
105 #endif
106 #define pmap_md_tlb_asid_max() (MIPS_TLB_NUM_PIDS - 1)
107 #ifdef MULTIPROCESSOR
108 #define PMAP_NO_PV_UNCACHED
109 #endif
110
111 /*
112 * We need the pmap_segtab's to be aligned on MIPS*R2 so we can use the
113 * EXT/INS instructions on their addresses.
114 */
115 #if (MIPS32R2 + MIPS64R2 + MIPS64R2_RMIXL) > 0
116 #define PMAP_SEGTAB_ALIGN __aligned(sizeof(void *)*NSEGPG) __section(".data1")
117 #endif
118
119 struct vm_physseg;
120
121 void pmap_md_init(void);
122 void pmap_md_icache_sync_all(void);
123 void pmap_md_icache_sync_range_index(vaddr_t, vsize_t);
124 void pmap_md_page_syncicache(struct vm_page *, const kcpuset_t *);
125 bool pmap_md_vca_add(struct vm_page *, vaddr_t, pt_entry_t *);
126 void pmap_md_vca_clean(struct vm_page *, int);
127 void pmap_md_vca_remove(struct vm_page *, vaddr_t, bool, bool);
128 bool pmap_md_ok_to_steal_p(const struct vm_physseg *, size_t);
129 bool pmap_md_tlb_check_entry(void *, vaddr_t, tlb_asid_t, pt_entry_t);
130
131 static inline bool
pmap_md_virtual_cache_aliasing_p(void)132 pmap_md_virtual_cache_aliasing_p(void)
133 {
134 return MIPS_CACHE_VIRTUAL_ALIAS;
135 }
136
137 static inline vsize_t
pmap_md_cache_prefer_mask(void)138 pmap_md_cache_prefer_mask(void)
139 {
140 return MIPS_HAS_R4K_MMU ? mips_cache_info.mci_cache_prefer_mask : 0;
141 }
142 #endif /* __PMAP_PRIVATE */
143
144 struct tlbmask {
145 vaddr_t tlb_hi;
146 #ifdef __mips_o32
147 uint32_t tlb_lo0;
148 uint32_t tlb_lo1;
149 #else
150 uint64_t tlb_lo0;
151 uint64_t tlb_lo1;
152 #endif
153 uint32_t tlb_mask;
154 };
155
156 #ifdef _LP64
157 #define PMAP_SEGTABSIZE NSEGPG
158 #else
159 #define PMAP_SEGTABSIZE (1 << (31 - SEGSHIFT))
160 #endif
161
162 #include <uvm/pmap/vmpagemd.h>
163 #include <uvm/pmap/pmap.h>
164 #include <uvm/pmap/pmap_tlb.h>
165 #include <uvm/pmap/pmap_synci.h>
166
167 #ifdef _KERNEL
168 /*
169 * Select CCA to use for unmanaged pages.
170 */
171 #define PMAP_CCA_FOR_PA(pa) CCA_UNCACHED /* uncached */
172
173 #if defined(_MIPS_PADDR_T_64BIT) || defined(_LP64)
174 #define PGC_NOCACHE 0x4000000000000000ULL
175 #define PGC_PREFETCH 0x2000000000000000ULL
176 #endif
177
178 #if defined(__PMAP_PRIVATE)
179 #include <mips/pte.h>
180 #endif
181
182 /*
183 * The user address space is 2Gb (0x0 - 0x80000000).
184 * User programs are laid out in memory as follows:
185 * address
186 * USRTEXT 0x00001000
187 * USRDATA USRTEXT + text_size
188 * USRSTACK 0x7FFFFFFF
189 *
190 * The user address space is mapped using a two level structure where
191 * virtual address bits 30..22 are used to index into a segment table which
192 * points to a page worth of PTEs (4096 page can hold 1024 PTEs).
193 * Bits 21..12 are then used to index a PTE which describes a page within
194 * a segment.
195 *
196 * The wired entries in the TLB will contain the following:
197 * 0-1 (UPAGES) for curproc user struct and kernel stack.
198 *
199 * Note: The kernel doesn't use the same data structures as user programs.
200 * All the PTE entries are stored in a single array in Sysmap which is
201 * dynamically allocated at boot time.
202 */
203
204 #define pmap_phys_address(x) mips_ptob(x)
205
206 /*
207 * Bootstrap the system enough to run with virtual memory.
208 */
209 void pmap_bootstrap(void);
210 void pmap_md_alloc_ephemeral_address_space(struct cpu_info *);
211 void pmap_procwr(struct proc *, vaddr_t, size_t);
212 #define PMAP_NEED_PROCWR
213
214 /*
215 * pmap_prefer() helps reduce virtual-coherency exceptions in
216 * the virtually-indexed cache on mips3 CPUs.
217 */
218 #ifdef MIPS3_PLUS
219 #define PMAP_PREFER(pa, va, sz, td) pmap_prefer((pa), (va), (sz), (td))
220 void pmap_prefer(vaddr_t, vaddr_t *, vsize_t, int);
221 #endif /* MIPS3_PLUS */
222
223 #define PMAP_ENABLE_PMAP_KMPAGE /* enable the PMAP_KMPAGE flag */
224
225 // these use register_t so we can pass XKPHYS adddresses to them on N32
226 bool pmap_md_direct_mapped_vaddr_p(register_t);
227 paddr_t pmap_md_direct_mapped_vaddr_to_paddr(register_t);
228 bool pmap_md_io_vaddr_p(vaddr_t);
229
230 /*
231 * Alternate mapping hooks for pool pages. Avoids thrashing the TLB.
232 */
233 vaddr_t pmap_md_map_poolpage(paddr_t, size_t);
234 paddr_t pmap_md_unmap_poolpage(vaddr_t, size_t);
235 struct vm_page *pmap_md_alloc_poolpage(int);
236
237 /*
238 * Other hooks for the pool allocator.
239 */
240 paddr_t pmap_md_pool_vtophys(vaddr_t);
241 vaddr_t pmap_md_pool_phystov(paddr_t);
242 #define POOL_VTOPHYS(va) pmap_md_pool_vtophys((vaddr_t)va)
243 #define POOL_PHYSTOV(pa) pmap_md_pool_phystov((paddr_t)pa)
244
245 #endif /* _KERNEL */
246 #endif /* _MIPS_PMAP_H_ */
247