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