1 /* $NetBSD: pmap.h,v 1.25 2023/09/28 06:24:37 skrll Exp $ */
2 /*-
3 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
8 * Agency and which was developed by Matt Thomas of 3am Software Foundry.
9 *
10 * This material is based upon work supported by the Defense Advanced Research
11 * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
12 * Contract No. N66001-09-C-2073.
13 * Approved for Public Release, Distribution Unlimited
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #ifndef _POWERPC_BOOKE_PMAP_H_
38 #define _POWERPC_BOOKE_PMAP_H_
39
40 #ifdef _LOCORE
41 #error use assym.h instead
42 #endif
43
44 #if defined(_MODULE)
45 #error this file should not be included by loadable kernel modules
46 #endif
47
48 #ifdef _KERNEL_OPT
49 #include "opt_multiprocessor.h"
50 #include "opt_pmap.h"
51 #endif
52
53 #include <sys/cpu.h>
54 #include <sys/kcore.h>
55 #include <uvm/uvm_page.h>
56 #include <uvm/uvm_physseg.h>
57 #ifdef __PMAP_PRIVATE
58 #include <powerpc/booke/cpuvar.h>
59 #endif
60
61 #define PMAP_NEED_PROCWR
62
63 #include <uvm/pmap/vmpagemd.h>
64
65 #include <powerpc/booke/pte.h>
66
67 #define NBSEG (NBPG*NPTEPG)
68 #define SEGSHIFT (PGSHIFT + PGSHIFT - 2)
69 #define SEGOFSET ((1 << SEGSHIFT) - 1)
70 #define PMAP_SEGTABSIZE (1 << (32 - SEGSHIFT))
71 #define NPTEPG (NBPG >> 2)
72
73 #define KERNEL_PID 0
74
75 #define PMAP_TLB_NUM_PIDS 256
76 #define PMAP_TLB_MAX 1
77 #define PMAP_INVALID_SEGTAB_ADDRESS ((pmap_segtab_t *)0xfeeddead)
78 #define PMAP_TLB_FLUSH_ASID_ON_RESET false
79
80 #define pmap_phys_address(x) (x)
81
82 void pmap_procwr(struct proc *, vaddr_t, size_t);
83 #define PMAP_NEED_PROCWR
84
85 #ifdef __PMAP_PRIVATE
86 struct vm_page *
87 pmap_md_alloc_poolpage(int flags);
88 vaddr_t pmap_md_map_poolpage(paddr_t, vsize_t);
89 void pmap_md_unmap_poolpage(vaddr_t, vsize_t);
90 bool pmap_md_direct_mapped_vaddr_p(vaddr_t);
91 bool pmap_md_io_vaddr_p(vaddr_t);
92 paddr_t pmap_md_direct_mapped_vaddr_to_paddr(vaddr_t);
93 vaddr_t pmap_md_direct_map_paddr(paddr_t);
94 void pmap_md_init(void);
95
96 bool pmap_md_tlb_check_entry(void *, vaddr_t, tlb_asid_t, pt_entry_t);
97
98 #ifdef MULTIPROCESSOR
99 #define PMAP_NEED_TLB_MISS_LOCK
100 #endif /* MULTIPROCESSOR */
101
102 #ifdef PMAP_MINIMALTLB
103 vaddr_t pmap_kvptefill(vaddr_t, vaddr_t, pt_entry_t);
104 #endif
105 #endif
106
107 void pmap_md_page_syncicache(struct vm_page_md *, const kcpuset_t *);
108 vaddr_t pmap_bootstrap(vaddr_t, vaddr_t, phys_ram_seg_t *, size_t);
109 bool pmap_extract(struct pmap *, vaddr_t, paddr_t *);
110
111 static __inline paddr_t vtophys(vaddr_t);
112
113 static __inline paddr_t
vtophys(vaddr_t va)114 vtophys(vaddr_t va)
115 {
116 paddr_t pa;
117
118 if (pmap_extract(pmap_kernel(), va, &pa))
119 return pa;
120 KASSERT(0);
121 return (paddr_t) -1;
122 }
123
124 #ifdef __PMAP_PRIVATE
125 /*
126 * Virtual Cache Alias helper routines. Not a problem for Booke CPUs.
127 */
128 static __inline bool
pmap_md_vca_add(struct vm_page_md * mdpg,vaddr_t va,pt_entry_t * nptep)129 pmap_md_vca_add(struct vm_page_md *mdpg, vaddr_t va, pt_entry_t *nptep)
130 {
131 return false;
132 }
133
134 static __inline void
pmap_md_vca_remove(struct vm_page_md * mdpg,vaddr_t va,bool dirty)135 pmap_md_vca_remove(struct vm_page_md *mdpg, vaddr_t va, bool dirty)
136 {
137
138 }
139
140 static __inline void
pmap_md_vca_clean(struct vm_page_md * mdpg,vaddr_t va,int op)141 pmap_md_vca_clean(struct vm_page_md *mdpg, vaddr_t va, int op)
142 {
143 }
144
145 static __inline size_t
pmap_md_tlb_asid_max(void)146 pmap_md_tlb_asid_max(void)
147 {
148 return PMAP_TLB_NUM_PIDS - 1;
149 }
150
151 struct vm_physseg;
152 static __inline bool
pmap_md_ok_to_steal_p(const uvm_physseg_t bank,size_t npgs)153 pmap_md_ok_to_steal_p(const uvm_physseg_t bank, size_t npgs)
154 {
155 return true;
156 }
157
158 static __inline void
pmap_md_xtab_activate(struct pmap * pm,struct lwp * l)159 pmap_md_xtab_activate(struct pmap *pm, struct lwp *l)
160 {
161
162 /* nothing */
163 }
164
165 static __inline void
pmap_md_xtab_deactivate(struct pmap * pm)166 pmap_md_xtab_deactivate(struct pmap *pm)
167 {
168
169 /* nothing */
170 }
171
172 #endif
173
174 #define POOL_VTOPHYS(va) ((paddr_t)(vaddr_t)(va))
175 #define POOL_PHYSTOV(pa) ((vaddr_t)(paddr_t)(pa))
176
177 #include <uvm/pmap/pmap.h>
178
179 #endif /* !_POWERPC_BOOKE_PMAP_H_ */
180