Subversion Repositories HelenOS

Rev

Rev 2417 | Rev 2465 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2464 jermar 1
/*
2
 * Copyright (c) 2007 Pavel Jancik, Michal Kebrt
3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
/** @addtogroup arm32mm
30
 * @{
31
 */
32
/** @file
33
 *  @brief Page fault related declarations.
34
 */
35
 
36
#ifndef KERN_arm32_PAGE_FAULT_H_
37
#define KERN_arm32_PAGE_FAULT_H_
38
 
39
#include <arch/types.h>
40
 
41
 
42
/** Decribes CP15 "fault status register" (FSR). */
43
typedef struct {
44
    unsigned status           : 3;
45
    unsigned domain           : 4;
46
    unsigned zero             : 1;
47
    unsigned should_be_zero   : 24;
48
} ATTRIBUTE_PACKED fault_status_t;
49
 
50
 
51
/** Help union used for casting integer value into #fault_status_t. */
52
typedef union {
53
    fault_status_t fs;
54
    uint32_t dummy;
55
} fault_status_union_t;
56
 
57
 
58
/** Simplified description of instruction code.
59
 *
60
 * @note Used for recognizing memory access instructions.
61
 * @see ARM architecture reference (chapter 3.1)
62
 */
63
typedef struct {
64
    unsigned dummy1        : 4;
65
    unsigned bit4          : 1;
66
    unsigned bits567       : 3;
67
    unsigned dummy         : 12;
68
    unsigned access        : 1;
69
    unsigned opcode        : 4;
70
    unsigned type          : 3;
71
    unsigned condition     : 4;
72
} ATTRIBUTE_PACKED instruction_t;
73
 
74
 
75
/** Help union used for casting pc register (uint_32_t) value into
76
 *  #instruction_t pointer.
77
 */
78
typedef union {
79
    instruction_t *instr;
80
    uint32_t pc;
81
} instruction_union_t;
82
 
83
extern void prefetch_abort(int n, istate_t *istate);
84
extern void data_abort(int n, istate_t *istate);
85
 
86
#endif
87
 
88
/** @}
89
 */