Subversion Repositories HelenOS

Rev

Rev 2304 | Rev 2414 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2278 jancik 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
 */
34
#ifndef KERN_arm32_PAGE_FAULT_H_
35
#define KERN_arm32_PAGE_FAULT_H
36
 
37
#include <arch/types.h>
38
 
2304 kebrt 39
 
2329 kebrt 40
/** Decribes CP15 "fault status register" (FSR). */
2278 jancik 41
typedef struct {
2304 kebrt 42
    unsigned status           : 3;
43
    unsigned domain           : 4;
44
    unsigned zero             : 1;
45
    unsigned should_be_zero   : 24;
2278 jancik 46
} __attribute__ ((packed)) fault_status_t;
47
 
2304 kebrt 48
 
2329 kebrt 49
/** Help union used for casting integer value into #fault_status_t. */
2278 jancik 50
typedef union {
2304 kebrt 51
    fault_status_t    fs;
52
    uint32_t          dummy;
2278 jancik 53
} fault_status_union_t;
54
 
2304 kebrt 55
 
56
/** Simplified description of instruction code.
2329 kebrt 57
 *
58
 * @note Used for recognizing memory access instructions.
59
 * @see ARM architecture reference (chapter 3.1)
2278 jancik 60
 */
61
typedef struct {
2304 kebrt 62
    unsigned dummy1        : 4;
63
    unsigned bit4          : 1;
64
    unsigned bits567       : 3;
65
    unsigned dummy         : 12;
66
    unsigned access        : 1;
67
    unsigned opcode        : 4;
68
    unsigned type          : 3;
69
    unsigned condition     : 4;
2278 jancik 70
} __attribute__ ((packed)) instruction_t;
71
 
2304 kebrt 72
 
73
/** Help union used for casting pc register (uint_32_t) value into
74
 *  #instruction_t pointer.
2278 jancik 75
 */
76
typedef union {
2304 kebrt 77
    instruction_t*   instr;
78
    uint32_t         pc;
2278 jancik 79
} instruction_union_t;
80
 
2304 kebrt 81
 
2278 jancik 82
extern void prefetch_abort(int n, istate_t *istate);
83
extern void data_abort(int n, istate_t *istate);
84
 
2329 kebrt 85
 
2278 jancik 86
#endif
87
 
88
/** @}
89
 */
90