| 1 | /*
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| 2 | * Copyright (c) 2006 Martin Decky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup ppc32
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef KERN_ppc32_EXCEPTION_H_
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| 36 | #define KERN_ppc32_EXCEPTION_H_
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| 37 |
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| 38 | #include <typedefs.h>
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| 39 | #include <arch/cpu.h>
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| 40 |
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| 41 | typedef struct istate {
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| 42 | uint32_t r0;
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| 43 | uint32_t r2;
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| 44 | uint32_t r3;
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| 45 | uint32_t r4;
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| 46 | uint32_t r5;
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| 47 | uint32_t r6;
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| 48 | uint32_t r7;
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| 49 | uint32_t r8;
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| 50 | uint32_t r9;
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| 51 | uint32_t r10;
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| 52 | uint32_t r11;
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| 53 | uint32_t r13;
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| 54 | uint32_t r14;
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| 55 | uint32_t r15;
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| 56 | uint32_t r16;
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| 57 | uint32_t r17;
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| 58 | uint32_t r18;
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| 59 | uint32_t r19;
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| 60 | uint32_t r20;
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| 61 | uint32_t r21;
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| 62 | uint32_t r22;
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| 63 | uint32_t r23;
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| 64 | uint32_t r24;
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| 65 | uint32_t r25;
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| 66 | uint32_t r26;
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| 67 | uint32_t r27;
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| 68 | uint32_t r28;
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| 69 | uint32_t r29;
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| 70 | uint32_t r30;
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| 71 | uint32_t r31;
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| 72 | uint32_t cr;
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| 73 | uint32_t pc;
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| 74 | uint32_t srr1;
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| 75 | uint32_t lr;
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| 76 | uint32_t ctr;
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| 77 | uint32_t xer;
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| 78 | uint32_t dar;
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| 79 | uint32_t r12;
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| 80 | uint32_t sp;
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| 81 | } istate_t;
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| 82 |
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| 83 | static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
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| 84 | {
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| 85 | istate->pc = retaddr;
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| 86 | }
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| 87 |
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| 88 | /** Return true if exception happened while in userspace
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| 89 | *
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| 90 | * The contexts of MSR register was stored in SRR1.
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| 91 | *
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| 92 | */
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| 93 | static inline int istate_from_uspace(istate_t *istate)
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| 94 | {
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| 95 | return (istate->srr1 & MSR_PR) != 0;
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| 96 | }
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| 97 |
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| 98 | static inline unative_t istate_get_pc(istate_t *istate)
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| 99 | {
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| 100 | return istate->pc;
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| 101 | }
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| 102 |
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| 103 | static inline unative_t istate_get_fp(istate_t *istate)
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| 104 | {
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| 105 | return istate->sp;
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| 106 | }
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| 107 |
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| 108 | #endif
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| 109 |
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| 110 | /** @}
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| 111 | */
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