1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Luoqi Chen <[email protected]>
5 * Copyright (c) Peter Wemm <[email protected]>
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD$
30 */
31
32 #ifndef _MACHINE_PCPU_H_
33 #define _MACHINE_PCPU_H_
34
35 #include <machine/cpufunc.h>
36 #include <machine/slb.h>
37 #include <machine/tlb.h>
38
39 struct pmap;
40 struct pvo_entry;
41 #define CPUSAVE_LEN 9
42
43 #define PCPU_MD_COMMON_FIELDS \
44 int pc_inside_intr; \
45 struct pmap *pc_curpmap; /* current pmap */ \
46 struct thread *pc_fputhread; /* current fpu user */ \
47 struct thread *pc_vecthread; /* current vec user */ \
48 struct thread *pc_htmthread; /* current htm user */ \
49 uintptr_t pc_hwref; \
50 int pc_bsp; \
51 volatile int pc_awake; \
52 uint32_t pc_ipimask; \
53 register_t pc_tempsave[CPUSAVE_LEN]; \
54 register_t pc_disisave[CPUSAVE_LEN]; \
55 register_t pc_dbsave[CPUSAVE_LEN]; \
56 void *pc_restore; \
57 vm_offset_t pc_qmap_addr;
58
59 #define PCPU_MD_AIM32_FIELDS \
60 struct pvo_entry *qmap_pvo; \
61 struct mtx qmap_lock; \
62 char __pad[128];
63
64 #define PCPU_MD_AIM64_FIELDS \
65 struct slb slb[64]; \
66 struct slb **userslb; \
67 register_t slbsave[18]; \
68 uint8_t slbstack[1024]; \
69 struct pvo_entry *qmap_pvo; \
70 struct mtx qmap_lock; \
71 char __pad[1345];
72
73 #ifdef __powerpc64__
74 #define PCPU_MD_AIM_FIELDS PCPU_MD_AIM64_FIELDS
75 #else
76 #define PCPU_MD_AIM_FIELDS PCPU_MD_AIM32_FIELDS
77 #endif
78
79 #define BOOKE_CRITSAVE_LEN (CPUSAVE_LEN + 2)
80 #define BOOKE_TLB_MAXNEST 3
81 #define BOOKE_TLB_SAVELEN 16
82 #define BOOKE_TLBSAVE_LEN (BOOKE_TLB_SAVELEN * BOOKE_TLB_MAXNEST)
83
84 #ifdef __powerpc64__
85 #define BOOKE_PCPU_PAD 901
86 #else
87 #define BOOKE_PCPU_PAD 429
88 #endif
89 #define PCPU_MD_BOOKE_FIELDS \
90 register_t critsave[BOOKE_CRITSAVE_LEN]; \
91 register_t mchksave[CPUSAVE_LEN]; \
92 register_t tlbsave[BOOKE_TLBSAVE_LEN]; \
93 register_t tlb_level; \
94 uintptr_t *tlb_lock; \
95 int tid_next; \
96 char __pad[BOOKE_PCPU_PAD];
97
98 /* Definitions for register offsets within the exception tmp save areas */
99 #define CPUSAVE_R27 0 /* where r27 gets saved */
100 #define CPUSAVE_R28 1 /* where r28 gets saved */
101 #define CPUSAVE_R29 2 /* where r29 gets saved */
102 #define CPUSAVE_R30 3 /* where r30 gets saved */
103 #define CPUSAVE_R31 4 /* where r31 gets saved */
104 #define CPUSAVE_AIM_DAR 5 /* where SPR_DAR gets saved */
105 #define CPUSAVE_AIM_DSISR 6 /* where SPR_DSISR gets saved */
106 #define CPUSAVE_BOOKE_DEAR 5 /* where SPR_DEAR gets saved */
107 #define CPUSAVE_BOOKE_ESR 6 /* where SPR_ESR gets saved */
108 #define CPUSAVE_SRR0 7 /* where SRR0 gets saved */
109 #define CPUSAVE_SRR1 8 /* where SRR1 gets saved */
110 #define BOOKE_CRITSAVE_SRR0 9 /* where real SRR0 gets saved (critical) */
111 #define BOOKE_CRITSAVE_SRR1 10 /* where real SRR0 gets saved (critical) */
112
113 /* Book-E TLBSAVE is more elaborate */
114 #define TLBSAVE_BOOKE_LR 0
115 #define TLBSAVE_BOOKE_CR 1
116 #define TLBSAVE_BOOKE_SRR0 2
117 #define TLBSAVE_BOOKE_SRR1 3
118 #define TLBSAVE_BOOKE_R20 4
119 #define TLBSAVE_BOOKE_R21 5
120 #define TLBSAVE_BOOKE_R22 6
121 #define TLBSAVE_BOOKE_R23 7
122 #define TLBSAVE_BOOKE_R24 8
123 #define TLBSAVE_BOOKE_R25 9
124 #define TLBSAVE_BOOKE_R26 10
125 #define TLBSAVE_BOOKE_R27 11
126 #define TLBSAVE_BOOKE_R28 12
127 #define TLBSAVE_BOOKE_R29 13
128 #define TLBSAVE_BOOKE_R30 14
129 #define TLBSAVE_BOOKE_R31 15
130
131 #define PCPU_MD_FIELDS \
132 PCPU_MD_COMMON_FIELDS \
133 union { \
134 struct { \
135 PCPU_MD_AIM_FIELDS \
136 } pc_aim; \
137 struct { \
138 PCPU_MD_BOOKE_FIELDS \
139 } pc_booke; \
140 }
141
142 #ifdef _KERNEL
143
144 #define pcpup (get_pcpu())
145
146 static __inline __pure2 struct thread *
__curthread(void)147 __curthread(void)
148 {
149 struct thread *td;
150 #ifdef __powerpc64__
151 __asm __volatile("mr %0,13" : "=r"(td));
152 #else
153 __asm __volatile("mr %0,2" : "=r"(td));
154 #endif
155 return (td);
156 }
157 #define curthread (__curthread())
158
159 #define PCPU_GET(member) (pcpup->pc_ ## member)
160
161 /*
162 * XXX The implementation of this operation should be made atomic
163 * with respect to preemption.
164 */
165 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
166 #define PCPU_INC(member) PCPU_ADD(member, 1)
167 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
168 #define PCPU_SET(member,value) (pcpup->pc_ ## member = (value))
169
170 #endif /* _KERNEL */
171
172 #endif /* !_MACHINE_PCPU_H_ */
173