source: mainline/kernel/arch/ppc32/include/exception.h@ 95c4776

/*
 * Copyright (c) 2006 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

/** @addtogroup ppc32   
 * @{
 */
/** @file
 */

#ifndef KERN_ppc32_EXCEPTION_H_
#define KERN_ppc32_EXCEPTION_H_

#include <arch/types.h>
#include <arch/regutils.h>

typedef struct istate {
        uint32_t r0;
        uint32_t r2;
        uint32_t r3;
        uint32_t r4;
        uint32_t r5;
        uint32_t r6;
        uint32_t r7;
        uint32_t r8;
        uint32_t r9;
        uint32_t r10;
        uint32_t r11;
        uint32_t r13;
        uint32_t r14;
        uint32_t r15;
        uint32_t r16;
        uint32_t r17;
        uint32_t r18;
        uint32_t r19;
        uint32_t r20;
        uint32_t r21;
        uint32_t r22;
        uint32_t r23;
        uint32_t r24;
        uint32_t r25;
        uint32_t r26;
        uint32_t r27;
        uint32_t r28;
        uint32_t r29;
        uint32_t r30;
        uint32_t r31;
        uint32_t cr;
        uint32_t pc;
        uint32_t srr1;
        uint32_t lr;
        uint32_t ctr;
        uint32_t xer;
        uint32_t dar;
        uint32_t r12;
        uint32_t sp;
} istate_t;

static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
{
        istate->pc = retaddr;
}

/** Return true if exception happened while in userspace */
static inline int istate_from_uspace(istate_t *istate)
{
        /* true if privilege level PR (copied from MSR) == 1 */
        return (istate->srr1 & MSR_PR) != 0;
}

static inline unative_t istate_get_pc(istate_t *istate)
{
        return istate->pc;
}

static inline unative_t istate_get_fp(istate_t *istate)
{
        return istate->sp;
}

#endif

/** @}
 */