Subversion Repositories HelenOS

Rev

Rev 391 | Rev 396 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 391 Rev 394
1 
/*
 1 
/*
2 
 * Copyright (C) 2003-2004 Jakub Jermar
 2 
 * Copyright (C) 2003-2004 Jakub Jermar
3 
 * All rights reserved.
 3 
 * All rights reserved.
4 
 *
 4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
 5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
 6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
 7 
 * are met:
8 
 *
 8 
 *
9 
 * - Redistributions of source code must retain the above copyright
 9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
 10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
 11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
 12 
 *   notice, this list of conditions and the following disclaimer in the
13 
 *   documentation and/or other materials provided with the distribution.
 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
 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.
 15 
 *   derived from this software without specific prior written permission.
16 
 *
 16 
 *
17 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 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
 18 
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 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
 23 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 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
 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.
 26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
 27 
 */
28 
 
 28 
 
29 
#ifndef __mips32_TLB_H__
 29 
#ifndef __mips32_TLB_H__
30 
#define __mips32_TLB_H__
 30 
#define __mips32_TLB_H__
31 
 
 31 
 
32 
#include <arch/exception.h>
 32 
#include <arch/exception.h>
33 
 
 33 
 
34 
#define TLB_SIZE    48
 34 
#define TLB_SIZE    48
35 
 
 35 
 
36 
#define TLB_WIRED       1
 36 
#define TLB_WIRED       1
37 
#define TLB_KSTACK_WIRED_INDEX  0
 37 
#define TLB_KSTACK_WIRED_INDEX  0
38 
 
 38 
 
39 
#define TLB_PAGE_MASK_16K   (0x3<<13)
 39 
#define TLB_PAGE_MASK_16K   (0x3<<13)
40 
 
 40 
 
41 
#define PAGE_UNCACHED           2
 41 
#define PAGE_UNCACHED           2
42 
#define PAGE_CACHEABLE_EXC_WRITE    5
 42 
#define PAGE_CACHEABLE_EXC_WRITE    5
43 
 
 43 
 
44 
struct entry_lo {
 44 
struct entry_lo {
45 
    unsigned g : 1;     /* global bit */
 45 
    unsigned g : 1;     /* global bit */
46 
    unsigned v : 1;     /* valid bit */
 46 
    unsigned v : 1;     /* valid bit */
47 
    unsigned d : 1;     /* dirty/write-protect bit */
 47 
    unsigned d : 1;     /* dirty/write-protect bit */
48 
    unsigned c : 3;     /* cache coherency attribute */
 48 
    unsigned c : 3;     /* cache coherency attribute */
49 
    unsigned pfn : 24;  /* frame number */
 49 
    unsigned pfn : 24;  /* frame number */
50 
    unsigned : 2;
 50 
    unsigned zero: 2;   /* zero */
- 
 
 51 
} __attribute__ ((packed));
- 
 
 52 
 
- 
 
 53 
struct pte {
- 
 
 54 
    unsigned g : 1;     /* global bit */
- 
 
 55 
    unsigned v : 1;     /* valid bit */
- 
 
 56 
    unsigned d : 1;     /* dirty/write-protect bit */
- 
 
 57 
    unsigned c : 3;     /* cache coherency attribute */
- 
 
 58 
    unsigned pfn : 24;  /* frame number */
- 
 
 59 
    unsigned w : 1;     /* writable */
- 
 
 60 
    unsigned a : 1;     /* accessed */
51 
} __attribute__ ((packed));
 61 
} __attribute__ ((packed));
52 
 
 62 
 
53 
struct entry_hi {
 63 
struct entry_hi {
54 
    unsigned asid : 8;
 64 
    unsigned asid : 8;
55 
    unsigned : 5;
 65 
    unsigned : 5;
56 
    unsigned vpn2 : 19;
 66 
    unsigned vpn2 : 19;
57 
} __attribute__ ((packed));
 67 
} __attribute__ ((packed));
58 
 
 68 
 
59 
struct page_mask {
 69 
struct page_mask {
60 
    unsigned : 13;
 70 
    unsigned : 13;
61 
    unsigned mask : 12;
 71 
    unsigned mask : 12;
62 
    unsigned : 7;
 72 
    unsigned : 7;
63 
} __attribute__ ((packed));
 73 
} __attribute__ ((packed));
64 
 
 74 
 
65 
struct tlb_entry {
 75 
struct index {
66 
    struct entry_lo lo0;
 76 
    unsigned index : 4;
67 
    struct entry_lo lo1;
 77 
    unsigned : 27;
68 
    struct entry_hi hi;
 78 
    unsigned p : 1;
69 
    struct page_mask mask;
 - 
 
70 
} __attribute__ ((packed));
 79 
} __attribute__ ((packed));
71 
 
 80 
 
- 
 
 81 
/** Probe TLB for Matching Entry
- 
 
 82 
 *
- 
 
 83 
 * Probe TLB for Matching Entry.
- 
 
 84 
 */
- 
 
 85 
static inline void tlbp(void)
- 
 
 86 
{
- 
 
 87 
    __asm__ volatile ("tlbp\n\t");
- 
 
 88 
}
- 
 
 89 
 
72 
 
 90 
 
73 
/** Read Indexed TLB Entry
 91 
/** Read Indexed TLB Entry
74 
 *
 92 
 *
75 
 * Read Indexed TLB Entry.
 93 
 * Read Indexed TLB Entry.
76 
 */
 94 
 */
77 
static inline void tlbr(void)
 95 
static inline void tlbr(void)
78 
{
 96 
{
79 
    __asm__ volatile ("tlbr\n\t");
 97 
    __asm__ volatile ("tlbr\n\t");
80 
}
 98 
}
81 
 
 99 
 
82 
/** Write Indexed TLB Entry
 100 
/** Write Indexed TLB Entry
83 
 *
 101 
 *
84 
 * Write Indexed TLB Entry.
 102 
 * Write Indexed TLB Entry.
85 
 */
 103 
 */
86 
static inline void tlbwi(void)
 104 
static inline void tlbwi(void)
87 
{
 105 
{
88 
    __asm__ volatile ("tlbwi\n\t");
 106 
    __asm__ volatile ("tlbwi\n\t");
89 
}
 107 
}
90 
 
 108 
 
91 
/** Write Random TLB Entry
 109 
/** Write Random TLB Entry
92 
 *
 110 
 *
93 
 * Write Random TLB Entry.
 111 
 * Write Random TLB Entry.
94 
 */
 112 
 */
95 
static inline void tlbwr(void)
 113 
static inline void tlbwr(void)
96 
{
 114 
{
97 
    __asm__ volatile ("tlbwr\n\t");
 115 
    __asm__ volatile ("tlbwr\n\t");
98 
}
 116 
}
99 
 
 117 
 
100 
extern void tlb_invalid(struct exception_regdump *pstate);
 118 
extern void tlb_invalid(struct exception_regdump *pstate);
101 
extern void tlb_refill(struct exception_regdump *pstate);
 119 
extern void tlb_refill(struct exception_regdump *pstate);
102 
extern void tlb_modified(struct exception_regdump *pstate);
 120 
extern void tlb_modified(struct exception_regdump *pstate);
103 
 
 121 
 
104 
#endif
 122 
#endif
105 
 
 123