FreeBSD/Linux Kernel Cross Reference
sys/mips/include/pcb.h
1 /* $OpenBSD: pcb.h,v 1.3 1998/09/15 10:50:12 pefo Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-3-Clause
5 *
6 * Copyright (c) 1988 University of Utah.
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
9 *
10 * This code is derived from software contributed to Berkeley by
11 * the Systems Programming Group of the University of Utah Computer
12 * Science Department and Ralph Campbell.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: Utah Hdr: pcb.h 1.13 89/04/23
39 * from: @(#)pcb.h 8.1 (Berkeley) 6/10/93
40 * JNPR: pcb.h,v 1.2 2006/08/07 11:51:17 katta
41 * $FreeBSD$
42 */
43
44 #ifndef _MACHINE_PCB_H_
45 #define _MACHINE_PCB_H_
46
47 /*
48 * used by switch.S
49 */
50 #define PCB_REG_S0 0
51 #define PCB_REG_S1 1
52 #define PCB_REG_S2 2
53 #define PCB_REG_S3 3
54 #define PCB_REG_S4 4
55 #define PCB_REG_S5 5
56 #define PCB_REG_S6 6
57 #define PCB_REG_S7 7
58 #define PCB_REG_SP 8
59 #define PCB_REG_S8 9
60 #define PCB_REG_RA 10
61 #define PCB_REG_SR 11
62 #define PCB_REG_GP 12
63 #define PCB_REG_PC 13
64
65 /*
66 * Call ast if required
67 *
68 * XXX Do we really need to disable interrupts?
69 */
70 #define DO_AST \
71 44: \
72 mfc0 t0, MIPS_COP_0_STATUS ;\
73 and a0, t0, MIPS_SR_INT_IE ;\
74 xor t0, a0, t0 ;\
75 mtc0 t0, MIPS_COP_0_STATUS ;\
76 COP0_SYNC ;\
77 GET_CPU_PCPU(s1) ;\
78 PTR_L s3, PC_CURPCB(s1) ;\
79 PTR_L s1, PC_CURTHREAD(s1) ;\
80 lw s2, TD_FLAGS(s1) ;\
81 li s0, TDF_ASTPENDING | TDF_NEEDRESCHED;\
82 and s2, s0 ;\
83 mfc0 t0, MIPS_COP_0_STATUS ;\
84 or t0, a0, t0 ;\
85 mtc0 t0, MIPS_COP_0_STATUS ;\
86 COP0_SYNC ;\
87 beq s2, zero, 4f ;\
88 nop ;\
89 PTR_LA s0, _C_LABEL(ast) ;\
90 jalr s0 ;\
91 PTR_ADDU a0, s3, U_PCB_REGS ;\
92 j 44b ;\
93 nop ;\
94 4:
95
96 #define SAVE_U_PCB_REG(reg, offs, base) \
97 REG_S reg, U_PCB_REGS + (SZREG * offs) (base)
98
99 #define RESTORE_U_PCB_REG(reg, offs, base) \
100 REG_L reg, U_PCB_REGS + (SZREG * offs) (base)
101
102 #define SAVE_U_PCB_FPREG(reg, offs, base) \
103 FP_S reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
104
105 #define RESTORE_U_PCB_FPREG(reg, offs, base) \
106 FP_L reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
107
108 #define SAVE_U_PCB_FPSR(reg, offs, base) \
109 REG_S reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
110
111 #define RESTORE_U_PCB_FPSR(reg, offs, base) \
112 REG_L reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
113
114 #define SAVE_U_PCB_CONTEXT(reg, offs, base) \
115 REG_S reg, U_PCB_CONTEXT + (SZREG * offs) (base)
116
117 #define RESTORE_U_PCB_CONTEXT(reg, offs, base) \
118 REG_L reg, U_PCB_CONTEXT + (SZREG * offs) (base)
119
120 #ifndef LOCORE
121 #include <machine/frame.h>
122
123 /*
124 * MIPS process control block
125 */
126 struct pcb
127 {
128 struct trapframe pcb_regs; /* saved CPU and registers */
129 __register_t pcb_context[14]; /* kernel context for resume */
130 void *pcb_onfault; /* for copyin/copyout faults */
131 register_t pcb_tpc;
132 };
133
134 #ifdef _KERNEL
135 extern struct pcb *curpcb; /* the current running pcb */
136
137 void makectx(struct trapframe *, struct pcb *);
138 int savectx(struct pcb *) __returns_twice;
139
140 #endif
141 #endif
142
143 #endif /* !_MACHINE_PCB_H_ */
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