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426 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
426 | jermar | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
3940 | decky | 29 | /** @addtogroup sparc64mm |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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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> |
3940 | decky | 44 | #include <ddi/ddi.h> |
426 | jermar | 45 | |
3940 | decky | 46 | /** Physical memory area for devices. */ |
47 | static parea_t dev_area; |
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48 | |||
1903 | jermar | 49 | #ifdef CONFIG_SMP |
50 | /** Entries locked in DTLB of BSP. |
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51 | * |
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2048 | jermar | 52 | * Application processors need to have the same locked entries in their DTLBs as |
53 | * the bootstrap processor. |
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1903 | jermar | 54 | */ |
55 | static struct { |
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56 | uintptr_t virt_page; |
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57 | uintptr_t phys_page; |
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58 | int pagesize_code; |
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3672 | jermar | 59 | } bsp_locked_dtlb_entry[DTLB_MAX_LOCKED_ENTRIES]; |
1903 | jermar | 60 | |
61 | /** Number of entries in bsp_locked_dtlb_entry array. */ |
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62 | static count_t bsp_locked_dtlb_entries = 0; |
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63 | #endif /* CONFIG_SMP */ |
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64 | |||
65 | /** Perform sparc64 specific initialization of paging. */ |
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426 | jermar | 66 | void page_arch_init(void) |
67 | { |
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1903 | jermar | 68 | if (config.cpu_active == 1) { |
69 | page_mapping_operations = &ht_mapping_operations; |
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70 | } else { |
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71 | |||
72 | #ifdef CONFIG_SMP |
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2745 | decky | 73 | unsigned int i; |
1903 | jermar | 74 | |
75 | /* |
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76 | * Copy locked DTLB entries from the BSP. |
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77 | */ |
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78 | for (i = 0; i < bsp_locked_dtlb_entries; i++) { |
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79 | dtlb_insert_mapping(bsp_locked_dtlb_entry[i].virt_page, |
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2141 | jermar | 80 | bsp_locked_dtlb_entry[i].phys_page, |
81 | bsp_locked_dtlb_entry[i].pagesize_code, true, |
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82 | false); |
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1903 | jermar | 83 | } |
84 | #endif |
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85 | |||
86 | } |
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426 | jermar | 87 | } |
1382 | decky | 88 | |
1841 | jermar | 89 | /** Map memory-mapped device into virtual memory. |
90 | * |
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2048 | jermar | 91 | * So far, only DTLB is used to map devices into memory. Chances are that there |
92 | * will be only a limited amount of devices that the kernel itself needs to |
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93 | * lock in DTLB. |
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1841 | jermar | 94 | * |
2048 | jermar | 95 | * @param physaddr Physical address of the page where the device is located. |
96 | * Must be at least page-aligned. |
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97 | * @param size Size of the device's registers. Must not exceed 4M and must |
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98 | * include extra space caused by the alignment. |
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1841 | jermar | 99 | * |
2048 | jermar | 100 | * @return Virtual address of the page where the device is mapped. |
1841 | jermar | 101 | */ |
1780 | jermar | 102 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
1382 | decky | 103 | { |
104 | unsigned int order; |
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2745 | decky | 105 | unsigned int i; |
1410 | jermar | 106 | |
1903 | jermar | 107 | ASSERT(config.cpu_active == 1); |
108 | |||
1410 | jermar | 109 | struct { |
1903 | jermar | 110 | int pagesize_code; |
1410 | jermar | 111 | size_t increment; |
112 | count_t count; |
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113 | } sizemap[] = { |
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2141 | jermar | 114 | { PAGESIZE_8K, 0, 1 }, /* 8K */ |
115 | { PAGESIZE_8K, MMU_PAGE_SIZE, 2 }, /* 16K */ |
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116 | { PAGESIZE_8K, MMU_PAGE_SIZE, 4 }, /* 32K */ |
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117 | { PAGESIZE_64K, 0, 1}, /* 64K */ |
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118 | { PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 2 }, /* 128K */ |
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119 | { PAGESIZE_64K, 8 * MMU_PAGE_SIZE, 4 }, /* 256K */ |
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120 | { PAGESIZE_512K, 0, 1 }, /* 512K */ |
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121 | { PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 2 }, /* 1M */ |
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122 | { PAGESIZE_512K, 64 * MMU_PAGE_SIZE, 4 }, /* 2M */ |
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123 | { PAGESIZE_4M, 0, 1 }, /* 4M */ |
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124 | { PAGESIZE_4M, 512 * MMU_PAGE_SIZE, 2 } /* 8M */ |
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1410 | jermar | 125 | }; |
1382 | decky | 126 | |
2141 | jermar | 127 | ASSERT(ALIGN_UP(physaddr, MMU_PAGE_SIZE) == physaddr); |
2048 | jermar | 128 | ASSERT(size <= 8 * 1024 * 1024); |
1410 | jermar | 129 | |
2141 | jermar | 130 | if (size <= MMU_FRAME_SIZE) |
1382 | decky | 131 | order = 0; |
132 | else |
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2141 | jermar | 133 | order = (fnzb64(size - 1) + 1) - MMU_FRAME_WIDTH; |
1793 | jermar | 134 | |
135 | /* |
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136 | * Use virtual addresses that are beyond the limit of physical memory. |
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137 | * Thus, the physical address space will not be wasted by holes created |
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138 | * by frame_alloc(). |
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139 | */ |
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1982 | jermar | 140 | ASSERT(PA2KA(last_frame)); |
2141 | jermar | 141 | uintptr_t virtaddr = ALIGN_UP(PA2KA(last_frame), |
142 | 1 << (order + FRAME_WIDTH)); |
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143 | last_frame = ALIGN_UP(KA2PA(virtaddr) + size, |
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144 | 1 << (order + FRAME_WIDTH)); |
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1382 | decky | 145 | |
1903 | jermar | 146 | for (i = 0; i < sizemap[order].count; i++) { |
147 | /* |
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148 | * First, insert the mapping into DTLB. |
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149 | */ |
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2048 | jermar | 150 | dtlb_insert_mapping(virtaddr + i * sizemap[order].increment, |
2141 | jermar | 151 | physaddr + i * sizemap[order].increment, |
152 | sizemap[order].pagesize_code, true, false); |
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1382 | decky | 153 | |
3908 | decky | 154 | #ifdef CONFIG_SMP |
1903 | jermar | 155 | /* |
156 | * Second, save the information about the mapping for APs. |
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157 | */ |
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2015 | jermar | 158 | bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].virt_page = |
2141 | jermar | 159 | virtaddr + i * sizemap[order].increment; |
2015 | jermar | 160 | bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].phys_page = |
2141 | jermar | 161 | physaddr + i * sizemap[order].increment; |
2015 | jermar | 162 | bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].pagesize_code = |
2141 | jermar | 163 | sizemap[order].pagesize_code; |
1903 | jermar | 164 | bsp_locked_dtlb_entries++; |
165 | #endif |
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166 | } |
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167 | |||
1382 | decky | 168 | return virtaddr; |
169 | } |
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1702 | cejka | 170 | |
3940 | decky | 171 | void hw_area(void) |
3908 | decky | 172 | { |
3940 | decky | 173 | dev_area.pbase = end_frame; |
174 | dev_area.frames = SIZE2FRAMES(0x7ffffffffff - end_frame); |
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175 | ddi_parea_register(&dev_area); |
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3908 | decky | 176 | } |
177 | |||
1793 | jermar | 178 | /** @} |
1702 | cejka | 179 | */ |