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_ */ 144