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scoutos / prex-0.9.0 / bsp / hal / ppc / include / context.h @ 03e9c04a

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/*-
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 * Copyright (c) 2009, Kohsuke Ohtani
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 * All rights reserved.
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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 author nor the names of any co-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 AUTHOR 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 AUTHOR 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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#ifndef _PPC_CONTEXT_H
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#define _PPC_CONTEXT_H
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#ifndef __ASSEMBLY__
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#include <sys/types.h>
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/*
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 * Common register frame for trap/interrupt.
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 * These cpu state are saved into top of the kernel stack in
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 * trap/interrupt entries. Since the arguments of system calls are
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 * passed via registers, the system call library is completely
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 * dependent on this register format.
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 */
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struct cpu_regs {
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        uint32_t        gr[32];                /* R0-R31 */
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        uint32_t        lr;
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        uint32_t        cr;
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        uint32_t        xer;
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        uint32_t        ctr;
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        uint32_t        srr0;
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        uint32_t        srr1;
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        uint32_t        trap_no;        /* trap number */
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};
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/*
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 * Kernel mode context for context switching.
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 */
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struct kern_regs {
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        uint32_t        gr[19];                /* R13-R31 */
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        uint32_t        r2;
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        uint32_t        sp;
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        uint32_t        lr;
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        uint32_t        cr;
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        uint32_t        kstack;                /* kernel stack */
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};
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/*
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 * Processor context
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 */
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struct context {
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        struct kern_regs kregs;                /* kernel mode registers */
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        struct cpu_regs        *uregs;                /* user mode registers */
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        struct cpu_regs        *saved_regs;        /* saved user mode registers */
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};
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typedef struct context *context_t;        /* context id */
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#endif /* !__ASSEMBLY__ */
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#define REG_R0                0x00
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#define REG_R1                0x04
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#define REG_R2                0x08
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#define REG_R3                0x0c
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#define REG_R4                0x10
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#define REG_R5                0x14
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#define REG_R6                0x18
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#define REG_R7                0x1c
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#define REG_R8                0x20
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#define REG_R9                0x24
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#define REG_R10                0x28
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#define REG_R11                0x2c
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#define REG_R12                0x30
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#define REG_R13                0x34
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#define REG_R14                0x38
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#define REG_R15                0x3c
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#define REG_R16                0x40
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#define REG_R17                0x44
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#define REG_R18                0x48
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#define REG_R19                0x4c
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#define REG_R20                0x50
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#define REG_R21                0x54
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#define REG_R22                0x58
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#define REG_R23                0x5c
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#define REG_R24                0x60
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#define REG_R25                0x64
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#define REG_R26                0x68
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#define REG_R27                0x6c
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#define REG_R28                0x70
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#define REG_R29                0x74
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#define REG_R30                0x78
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#define REG_R31                0x7c
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#define REG_LR                0x80
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#define REG_CR                0x84
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#define REG_XER                0x88
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#define REG_CTR                0x8c
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#define REG_SRR0        0x90
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#define REG_SRR1        0x94
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#define CTX_TRAPNO        0x98
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#define CTXREGS                (4*39)
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#endif /* !_PPC_CONTEXT_H */