Colony » Colony Scout

/*-

 * Copyright (c) 2009, Kohsuke Ohtani

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#ifndef _PPC_CONTEXT_H

#define _PPC_CONTEXT_H

#ifndef __ASSEMBLY__

#include <sys/types.h>

/*

 * Common register frame for trap/interrupt.

 * These cpu state are saved into top of the kernel stack in

 * trap/interrupt entries. Since the arguments of system calls are

 * passed via registers, the system call library is completely

 * dependent on this register format.

 */

struct cpu_regs {

        uint32_t        gr[32];                /* R0-R31 */

        uint32_t        lr;

        uint32_t        cr;

        uint32_t        xer;

        uint32_t        ctr;

        uint32_t        srr0;

        uint32_t        srr1;

        uint32_t        trap_no;        /* trap number */

};

/*

 * Kernel mode context for context switching.

 */

struct kern_regs {

        uint32_t        gr[19];                /* R13-R31 */

        uint32_t        r2;

        uint32_t        sp;

        uint32_t        lr;

        uint32_t        cr;

        uint32_t        kstack;                /* kernel stack */

};

/*

 * Processor context

 */

struct context {

        struct kern_regs kregs;                /* kernel mode registers */

        struct cpu_regs        *uregs;                /* user mode registers */

        struct cpu_regs        *saved_regs;        /* saved user mode registers */

};

typedef struct context *context_t;        /* context id */

#endif /* !__ASSEMBLY__ */

#define REG_R0                0x00

#define REG_R1                0x04

#define REG_R2                0x08

#define REG_R3                0x0c

#define REG_R4                0x10

#define REG_R5                0x14

#define REG_R6                0x18

#define REG_R7                0x1c

#define REG_R8                0x20

#define REG_R9                0x24

#define REG_R10                0x28

#define REG_R11                0x2c

#define REG_R12                0x30

#define REG_R13                0x34

#define REG_R14                0x38

#define REG_R15                0x3c

#define REG_R16                0x40

#define REG_R17                0x44

#define REG_R18                0x48

#define REG_R19                0x4c

#define REG_R20                0x50

#define REG_R21                0x54

#define REG_R22                0x58

#define REG_R23                0x5c

#define REG_R24                0x60

#define REG_R25                0x64

#define REG_R26                0x68

#define REG_R27                0x6c

#define REG_R28                0x70

#define REG_R29                0x74

#define REG_R30                0x78

#define REG_R31                0x7c

#define REG_LR                0x80

#define REG_CR                0x84

#define REG_XER                0x88

#define REG_CTR                0x8c

#define REG_SRR0        0x90

#define REG_SRR1        0x94

#define CTX_TRAPNO        0x98

#define CTXREGS                (4*39)

#endif /* !_PPC_CONTEXT_H */