Subversion Repositories HelenOS

Rev

Rev 2128 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 2128 Rev 2465
Line 1... Line 1...
1 
/*
 1 
/*
2 
 * Copyright (c) 2003-2004 Jakub Jermar
 2 
 * Copyright (c) 2007 Michal Kebrt, Petr Stepan
- 
 
 3 
 *
3 
 * All rights reserved.
 4 
 * All rights reserved.
4 
 *
 5 
 *
5 
 * Redistribution and use in source and binary forms, with or without
 6 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
 7 
 * modification, are permitted provided that the following conditions
7 
 * are met:
 8 
 * are met:
Line 28... Line 29...
28 
 
 29 
 
29 
/** @addtogroup arm32  
 30 
/** @addtogroup arm32  
30 
 * @{
 31 
 * @{
31 
 */
 32 
 */
32 
/** @file
 33 
/** @file
- 
 
 34 
 *  @brief Exception declarations.
33 
 */
 35 
 */
34 
 
 36 
 
35 
#ifndef KERN_arm32_EXCEPTION_H_
 37 
#ifndef KERN_arm32_EXCEPTION_H_
36 
#define KERN_arm32_EXCEPTION_H_
 38 
#define KERN_arm32_EXCEPTION_H_
37 
 
 39 
 
38 
#include <arch/types.h>
 40 
#include <arch/types.h>
- 
 
 41 
#include <arch/regutils.h>
- 
 
 42 
 
- 
 
 43 
/** If defined, forces using of high exception vectors. */
- 
 
 44 
#define HIGH_EXCEPTION_VECTORS
- 
 
 45 
 
- 
 
 46 
#ifdef HIGH_EXCEPTION_VECTORS
- 
 
 47 
    #define EXC_BASE_ADDRESS    0xffff0000
- 
 
 48 
#else
- 
 
 49 
    #define EXC_BASE_ADDRESS    0x0
- 
 
 50 
#endif
- 
 
 51 
 
- 
 
 52 
/* Exception Vectors */
- 
 
 53 
#define EXC_RESET_VEC          (EXC_BASE_ADDRESS + 0x0)
- 
 
 54 
#define EXC_UNDEF_INSTR_VEC    (EXC_BASE_ADDRESS + 0x4)
- 
 
 55 
#define EXC_SWI_VEC            (EXC_BASE_ADDRESS + 0x8)
- 
 
 56 
#define EXC_PREFETCH_ABORT_VEC (EXC_BASE_ADDRESS + 0xc)
- 
 
 57 
#define EXC_DATA_ABORT_VEC     (EXC_BASE_ADDRESS + 0x10)
- 
 
 58 
#define EXC_IRQ_VEC            (EXC_BASE_ADDRESS + 0x18)
- 
 
 59 
#define EXC_FIQ_VEC            (EXC_BASE_ADDRESS + 0x1c)
- 
 
 60 
 
- 
 
 61 
/* Exception numbers */
- 
 
 62 
#define EXC_RESET           0
- 
 
 63 
#define EXC_UNDEF_INSTR     1
- 
 
 64 
#define EXC_SWI             2
- 
 
 65 
#define EXC_PREFETCH_ABORT  3
- 
 
 66 
#define EXC_DATA_ABORT      4
- 
 
 67 
#define EXC_IRQ             5
- 
 
 68 
#define EXC_FIQ             6
- 
 
 69 
 
- 
 
 70 
 
- 
 
 71 
/** Kernel stack pointer.
- 
 
 72 
 *
- 
 
 73 
 * It is set when thread switches to user mode,
- 
 
 74 
 * and then used for exception handling.
- 
 
 75 
 */
- 
 
 76 
extern uintptr_t supervisor_sp;
- 
 
 77 
 
- 
 
 78 
 
- 
 
 79 
/** Temporary exception stack pointer.
- 
 
 80 
 *
- 
 
 81 
 * Temporary stack is used in exceptions handling routines
- 
 
 82 
 * before switching to thread's kernel stack.
- 
 
 83 
 */
- 
 
 84 
extern uintptr_t exc_stack;
- 
 
 85 
 
39 
 
 86 
 
- 
 
 87 
/** Struct representing CPU state saved when an exception occurs. */
40 
typedef struct {
 88 
typedef struct {
- 
 
 89 
    uint32_t spsr;
- 
 
 90 
    uint32_t sp;
- 
 
 91 
    uint32_t lr;
- 
 
 92 
 
- 
 
 93 
    uint32_t r0;
- 
 
 94 
    uint32_t r1;
- 
 
 95 
    uint32_t r2;
41 
    /* TODO */
 96 
    uint32_t r3;
- 
 
 97 
    uint32_t r4;
- 
 
 98 
    uint32_t r5;
- 
 
 99 
    uint32_t r6;
- 
 
 100 
    uint32_t r7;
- 
 
 101 
    uint32_t r8;
- 
 
 102 
    uint32_t r9;
- 
 
 103 
    uint32_t r10;
- 
 
 104 
    uint32_t r11;
- 
 
 105 
    uint32_t r12;
- 
 
 106 
 
- 
 
 107 
    uint32_t pc;
42 
} istate_t;
 108 
} istate_t;
43 
 
 109 
 
- 
 
 110 
 
- 
 
 111 
/** Sets Program Counter member of given istate structure.
- 
 
 112 
 *
- 
 
 113 
 * @param istate istate structure
- 
 
 114 
 * @param retaddr new value of istate's PC member
- 
 
 115 
 */
44 
static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
 116 
static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
45 
{
 117 
{
46 
    /* TODO */
 118 
    istate->pc = retaddr;
47 
}
 119 
}
48 
 
 120 
 
- 
 
 121 
 
49 
/** Return true if exception happened while in userspace */
 122 
/** Returns true if exception happened while in userspace. */
50 
static inline int istate_from_uspace(istate_t *istate)
 123 
static inline int istate_from_uspace(istate_t *istate)
51 
{
 124 
{
52 
    /* TODO */
 - 
 
53 
    return 0;
 125 
    return (istate->spsr & STATUS_REG_MODE_MASK) == USER_MODE;
54 
}
 126 
}
- 
 
 127 
 
- 
 
 128 
 
- 
 
 129 
/** Returns Program Counter member of given istate structure. */
55 
static inline unative_t istate_get_pc(istate_t *istate)
 130 
static inline unative_t istate_get_pc(istate_t *istate)
56 
{
 131 
{
57 
    /* TODO */
 - 
 
58 
    return 0;
 132 
    return istate->pc;
59 
}
 133 
}
60 
 
 134 
 
- 
 
 135 
 
- 
 
 136 
extern void install_exception_handlers(void);
- 
 
 137 
extern void exception_init(void);
- 
 
 138 
extern void print_istate(istate_t *istate);
- 
 
 139 
 
- 
 
 140 
 
61 
#endif
 141 
#endif
62 
 
 142 
 
63 
/** @}
 143 
/** @}
64 
 */
 144 
 */