Subversion Repositories HelenOS-historic

Rev

Rev 760 | Rev 831 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
319 jermar 2
 * Copyright (C) 2003-2004 Jakub Jermar
1 jermar 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
 
341 jermar 29
#ifndef __mips32_PAGE_H__
30
#define __mips32_PAGE_H__
1 jermar 31
 
765 jermar 32
#define PAGE_WIDTH  FRAME_WIDTH
1 jermar 33
#define PAGE_SIZE   FRAME_SIZE
34
 
306 palkovsky 35
#ifndef __ASM__
36
#  define KA2PA(x)  (((__address) (x)) - 0x80000000)
37
#  define PA2KA(x)  (((__address) (x)) + 0x80000000)
38
#else
39
#  define KA2PA(x)  ((x) - 0x80000000)
40
#  define PA2KA(x)  ((x) + 0x80000000)
41
#endif
1 jermar 42
 
120 jermar 43
/*
44
 * Implementation of generic 4-level page table interface.
121 jermar 45
 * NOTE: this implementation is under construction
46
 *
47
 * Page table layout:
48
 * - 32-bit virtual addresses
49
 * - Offset is 14 bits => pages are 16K long
394 jermar 50
 * - PTE's use similar format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long
51
 * - PTE's make use of CP0 EntryLo's two-bit reserved field for bit W (writable) and bit A (accessed)
121 jermar 52
 * - PTL0 has 64 entries (6 bits)
53
 * - PTL1 is not used
54
 * - PTL2 is not used
55
 * - PTL3 has 4096 entries (12 bits)
120 jermar 56
 */
121 jermar 57
 
58
#define PTL0_INDEX_ARCH(vaddr)  ((vaddr)>>26) 
120 jermar 59
#define PTL1_INDEX_ARCH(vaddr)  0
60
#define PTL2_INDEX_ARCH(vaddr)  0
394 jermar 61
#define PTL3_INDEX_ARCH(vaddr)  (((vaddr)>>14)&0x3fff)
120 jermar 62
 
760 jermar 63
#define SET_PTL0_ADDRESS_ARCH(ptl0)
120 jermar 64
 
403 jermar 65
#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      (((pte_t *)(ptl0))[(i)].lo.pfn<<12)
125 jermar 66
#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      (ptl1)
67
#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      (ptl2)
403 jermar 68
#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     (((pte_t *)(ptl3))[(i)].lo.pfn<<12)
121 jermar 69
 
403 jermar 70
#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   (((pte_t *)(ptl0))[(i)].lo.pfn = (a)>>12)
120 jermar 71
#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
72
#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
403 jermar 73
#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)  (((pte_t *)(ptl3))[(i)].lo.pfn = (a)>>12)
120 jermar 74
 
125 jermar 75
#define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *)(ptl0), (index_t)(i))
76
#define GET_PTL2_FLAGS_ARCH(ptl1, i)        PAGE_PRESENT
77
#define GET_PTL3_FLAGS_ARCH(ptl2, i)        PAGE_PRESENT
78
#define GET_FRAME_FLAGS_ARCH(ptl3, i)       get_pt_flags((pte_t *)(ptl3), (index_t)(i))
120 jermar 79
 
121 jermar 80
#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)     set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
120 jermar 81
#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
82
#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
121 jermar 83
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
120 jermar 84
 
306 palkovsky 85
#ifndef __ASM__
86
 
87
#include <arch/mm/tlb.h>
88
#include <mm/page.h>
89
#include <arch/mm/frame.h>
90
#include <arch/types.h>
91
 
121 jermar 92
static inline int get_pt_flags(pte_t *pt, index_t i)
93
{
94
    pte_t *p = &pt[i];
95
 
96
    return (
403 jermar 97
        ((p->lo.c>PAGE_UNCACHED)<<PAGE_CACHEABLE_SHIFT) |
98
        ((!p->lo.v)<<PAGE_PRESENT_SHIFT) |
121 jermar 99
        (1<<PAGE_USER_SHIFT) |
100
        (1<<PAGE_READ_SHIFT) |
394 jermar 101
        ((p->w)<<PAGE_WRITE_SHIFT) |
121 jermar 102
        (1<<PAGE_EXEC_SHIFT)
103
    );
104
 
105
}
120 jermar 106
 
121 jermar 107
static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
108
{
109
    pte_t *p = &pt[i];
110
 
403 jermar 111
    p->lo.c = (flags & PAGE_CACHEABLE) != 0 ? PAGE_CACHEABLE_EXC_WRITE : PAGE_UNCACHED;
112
    p->lo.v = !(flags & PAGE_NOT_PRESENT);
394 jermar 113
    p->w = (flags & PAGE_WRITE) != 0;
121 jermar 114
}
115
 
116
extern void page_arch_init(void);
117
 
306 palkovsky 118
#endif /* __ASM__ */
119
 
1 jermar 120
#endif