Subversion Repositories HelenOS

Rev

Rev 3022 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
426 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2005 Jakub Jermar
426 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
 
4055 trochtova 29
/** @addtogroup sparc64mm
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
426 jermar 35
#include <arch/mm/page.h>
1382 decky 36
#include <arch/mm/tlb.h>
684 jermar 37
#include <genarch/mm/page_ht.h>
1382 decky 38
#include <mm/frame.h>
1793 jermar 39
#include <arch/mm/frame.h>
1382 decky 40
#include <bitops.h>
1410 jermar 41
#include <debug.h>
1793 jermar 42
#include <align.h>
1903 jermar 43
#include <config.h>
426 jermar 44
 
1903 jermar 45
#ifdef CONFIG_SMP
46
/** Entries locked in DTLB of BSP.
47
 *
2048 jermar 48
 * Application processors need to have the same locked entries in their DTLBs as
49
 * the bootstrap processor.
1903 jermar 50
 */
51
static struct {
52
    uintptr_t virt_page;
53
    uintptr_t phys_page;
54
    int pagesize_code;
4055 trochtova 55
} bsp_locked_dtlb_entry[DTLB_MAX_LOCKED_ENTRIES];
1903 jermar 56
 
57
/** Number of entries in bsp_locked_dtlb_entry array. */
58
static count_t bsp_locked_dtlb_entries = 0;
59
#endif /* CONFIG_SMP */
60
 
61
/** Perform sparc64 specific initialization of paging. */
426 jermar 62
void page_arch_init(void)
63
{
1903 jermar 64
    if (config.cpu_active == 1) {
65
        page_mapping_operations = &ht_mapping_operations;
66
    } else {
67
 
68
#ifdef CONFIG_SMP
2745 decky 69
        unsigned int i;
1903 jermar 70
 
71
        /*
72
         * Copy locked DTLB entries from the BSP.
73
         */    
74
        for (i = 0; i < bsp_locked_dtlb_entries; i++) {
75
            dtlb_insert_mapping(bsp_locked_dtlb_entry[i].virt_page,
2141 jermar 76
                bsp_locked_dtlb_entry[i].phys_page,
77
                bsp_locked_dtlb_entry[i].pagesize_code, true,
78
                false);
1903 jermar 79
        }
80
#endif  
81
 
82
    }
426 jermar 83
}
1382 decky 84
 
1841 jermar 85
/** Map memory-mapped device into virtual memory.
86
 *
2048 jermar 87
 * So far, only DTLB is used to map devices into memory. Chances are that there
88
 * will be only a limited amount of devices that the kernel itself needs to
89
 * lock in DTLB.
1841 jermar 90
 *
2048 jermar 91
 * @param physaddr Physical address of the page where the device is located.
92
 *  Must be at least page-aligned.
93
 * @param size Size of the device's registers. Must not exceed 4M and must
94
 *  include extra space caused by the alignment.
1841 jermar 95
 *
2048 jermar 96
 * @return Virtual address of the page where the device is mapped.
1841 jermar 97
 */
1780 jermar 98
uintptr_t hw_map(uintptr_t physaddr, size_t size)
1382 decky 99
{
100
    unsigned int order;
2745 decky 101
    unsigned int i;
1410 jermar 102
 
1903 jermar 103
    ASSERT(config.cpu_active == 1);
104
 
1410 jermar 105
    struct {
1903 jermar 106
        int pagesize_code;
1410 jermar 107
        size_t increment;
108
        count_t count;
109
    } sizemap[] = {
2141 jermar 110
        { PAGESIZE_8K, 0, 1 },              /* 8K */
111
        { PAGESIZE_8K, MMU_PAGE_SIZE, 2 },      /* 16K */
112
        { PAGESIZE_8K, MMU_PAGE_SIZE, 4 },      /* 32K */
113
        { PAGESIZE_64K, 0, 1},              /* 64K */
114
        { PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 2 },     /* 128K */
115
        { PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 4 },     /* 256K */
116
        { PAGESIZE_512K, 0, 1 },            /* 512K */
117
        { PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 2 },   /* 1M */
118
        { PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 4 },   /* 2M */
119
        { PAGESIZE_4M, 0, 1 },              /* 4M */
120
        { PAGESIZE_4M, 512 * MMU_PAGE_SIZE, 2 }     /* 8M */
1410 jermar 121
    };
1382 decky 122
 
2141 jermar 123
    ASSERT(ALIGN_UP(physaddr, MMU_PAGE_SIZE) == physaddr);
2048 jermar 124
    ASSERT(size <= 8 * 1024 * 1024);
1410 jermar 125
 
2141 jermar 126
    if (size <= MMU_FRAME_SIZE)
1382 decky 127
        order = 0;
128
    else
2141 jermar 129
        order = (fnzb64(size - 1) + 1) - MMU_FRAME_WIDTH;
1793 jermar 130
 
131
    /*
132
     * Use virtual addresses that are beyond the limit of physical memory.
133
     * Thus, the physical address space will not be wasted by holes created
134
     * by frame_alloc().
135
     */
1982 jermar 136
    ASSERT(PA2KA(last_frame));
2141 jermar 137
    uintptr_t virtaddr = ALIGN_UP(PA2KA(last_frame),
138
        1 << (order + FRAME_WIDTH));
139
    last_frame = ALIGN_UP(KA2PA(virtaddr) + size,
140
        1 << (order + FRAME_WIDTH));
1382 decky 141
 
1903 jermar 142
    for (i = 0; i < sizemap[order].count; i++) {
143
        /*
144
         * First, insert the mapping into DTLB.
145
         */
2048 jermar 146
        dtlb_insert_mapping(virtaddr + i * sizemap[order].increment,
2141 jermar 147
            physaddr + i * sizemap[order].increment,
148
            sizemap[order].pagesize_code, true, false);
1382 decky 149
 
4055 trochtova 150
#ifdef CONFIG_SMP
1903 jermar 151
        /*
152
         * Second, save the information about the mapping for APs.
153
         */
2015 jermar 154
        bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].virt_page =
2141 jermar 155
            virtaddr + i * sizemap[order].increment;
2015 jermar 156
        bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].phys_page =
2141 jermar 157
            physaddr + i * sizemap[order].increment;
2015 jermar 158
        bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].pagesize_code =
2141 jermar 159
            sizemap[order].pagesize_code;
1903 jermar 160
        bsp_locked_dtlb_entries++;
161
#endif
162
    }
163
 
1382 decky 164
    return virtaddr;
165
}
1702 cejka 166
 
1793 jermar 167
/** @}
1702 cejka 168
 */