Subversion Repositories HelenOS

Rev

Rev 2787 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2128 jermar 1
/*
2465 jermar 2
 * Copyright (c) 2007 Michal Kebrt, Petr Stepan
3
 *
2128 jermar 4
 * All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 *
10
 * - Redistributions of source code must retain the above copyright
11
 *   notice, this list of conditions and the following disclaimer.
12
 * - Redistributions in binary form must reproduce the above copyright
13
 *   notice, this list of conditions and the following disclaimer in the
14
 *   documentation and/or other materials provided with the distribution.
15
 * - The name of the author may not be used to endorse or promote products
16
 *   derived from this software without specific prior written permission.
17
 *
18
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
 */
29
 
30
/** @addtogroup arm32  
31
 * @{
32
 */
33
/** @file
2465 jermar 34
 *  @brief Exception declarations.
2128 jermar 35
 */
36
 
37
#ifndef KERN_arm32_EXCEPTION_H_
38
#define KERN_arm32_EXCEPTION_H_
39
 
40
#include <arch/types.h>
2465 jermar 41
#include <arch/regutils.h>
2128 jermar 42
 
2465 jermar 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
 
86
 
87
/** Struct representing CPU state saved when an exception occurs. */
2128 jermar 88
typedef struct {
2465 jermar 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;
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;
2128 jermar 108
} istate_t;
109
 
2465 jermar 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
 */
2128 jermar 116
static inline void istate_set_retaddr(istate_t *istate, uintptr_t retaddr)
117
{
2465 jermar 118
    istate->pc = retaddr;
2128 jermar 119
}
120
 
2465 jermar 121
 
122
/** Returns true if exception happened while in userspace. */
2128 jermar 123
static inline int istate_from_uspace(istate_t *istate)
124
{
2465 jermar 125
    return (istate->spsr & STATUS_REG_MODE_MASK) == USER_MODE;
2128 jermar 126
}
2465 jermar 127
 
128
 
129
/** Returns Program Counter member of given istate structure. */
2128 jermar 130
static inline unative_t istate_get_pc(istate_t *istate)
131
{
2465 jermar 132
    return istate->pc;
2128 jermar 133
}
134
 
2465 jermar 135
 
136
extern void install_exception_handlers(void);
137
extern void exception_init(void);
138
extern void print_istate(istate_t *istate);
4692 svoboda 139
extern void reset_exception_entry(void);
140
extern void irq_exception_entry(void);
141
extern void fiq_exception_entry(void);
142
extern void undef_instr_exception_entry(void);
143
extern void prefetch_abort_exception_entry(void);
144
extern void data_abort_exception_entry(void);
145
extern void swi_exception_entry(void);
2465 jermar 146
 
147
 
2128 jermar 148
#endif
149
 
150
/** @}
151
 */