4736ccfd9c
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144 lines
4.7 KiB
C
144 lines
4.7 KiB
C
/* $OpenBSD: pcb.h,v 1.3 1998/09/15 10:50:12 pefo Exp $ */
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department and Ralph Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah Hdr: pcb.h 1.13 89/04/23
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* from: @(#)pcb.h 8.1 (Berkeley) 6/10/93
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* JNPR: pcb.h,v 1.2 2006/08/07 11:51:17 katta
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PCB_H_
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#define _MACHINE_PCB_H_
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/*
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* used by switch.S
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*/
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#define PCB_REG_S0 0
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#define PCB_REG_S1 1
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#define PCB_REG_S2 2
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#define PCB_REG_S3 3
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#define PCB_REG_S4 4
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#define PCB_REG_S5 5
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#define PCB_REG_S6 6
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#define PCB_REG_S7 7
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#define PCB_REG_SP 8
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#define PCB_REG_S8 9
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#define PCB_REG_RA 10
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#define PCB_REG_SR 11
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#define PCB_REG_GP 12
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#define PCB_REG_PC 13
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/*
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* Call ast if required
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*
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* XXX Do we really need to disable interrupts?
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*/
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#define DO_AST \
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44: \
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mfc0 t0, MIPS_COP_0_STATUS ;\
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and a0, t0, MIPS_SR_INT_IE ;\
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xor t0, a0, t0 ;\
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mtc0 t0, MIPS_COP_0_STATUS ;\
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COP0_SYNC ;\
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GET_CPU_PCPU(s1) ;\
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PTR_L s3, PC_CURPCB(s1) ;\
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PTR_L s1, PC_CURTHREAD(s1) ;\
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lw s2, TD_FLAGS(s1) ;\
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li s0, TDF_ASTPENDING | TDF_NEEDRESCHED;\
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and s2, s0 ;\
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mfc0 t0, MIPS_COP_0_STATUS ;\
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or t0, a0, t0 ;\
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mtc0 t0, MIPS_COP_0_STATUS ;\
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COP0_SYNC ;\
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beq s2, zero, 4f ;\
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nop ;\
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PTR_LA s0, _C_LABEL(ast) ;\
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jalr s0 ;\
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PTR_ADDU a0, s3, U_PCB_REGS ;\
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j 44b ;\
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nop ;\
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4:
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#define SAVE_U_PCB_REG(reg, offs, base) \
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REG_S reg, U_PCB_REGS + (SZREG * offs) (base)
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#define RESTORE_U_PCB_REG(reg, offs, base) \
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REG_L reg, U_PCB_REGS + (SZREG * offs) (base)
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#define SAVE_U_PCB_FPREG(reg, offs, base) \
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FP_S reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
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#define RESTORE_U_PCB_FPREG(reg, offs, base) \
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FP_L reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
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#define SAVE_U_PCB_FPSR(reg, offs, base) \
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REG_S reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
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#define RESTORE_U_PCB_FPSR(reg, offs, base) \
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REG_L reg, U_PCB_FPREGS + (SZFPREG * offs) (base)
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#define SAVE_U_PCB_CONTEXT(reg, offs, base) \
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REG_S reg, U_PCB_CONTEXT + (SZREG * offs) (base)
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#define RESTORE_U_PCB_CONTEXT(reg, offs, base) \
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REG_L reg, U_PCB_CONTEXT + (SZREG * offs) (base)
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#ifndef LOCORE
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#include <machine/frame.h>
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/*
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* MIPS process control block
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*/
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struct pcb
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{
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struct trapframe pcb_regs; /* saved CPU and registers */
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__register_t pcb_context[14]; /* kernel context for resume */
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void *pcb_onfault; /* for copyin/copyout faults */
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register_t pcb_tpc;
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};
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#ifdef _KERNEL
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extern struct pcb *curpcb; /* the current running pcb */
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void makectx(struct trapframe *, struct pcb *);
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int savectx(struct pcb *) __returns_twice;
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#endif
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#endif
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#endif /* !_MACHINE_PCB_H_ */
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