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426 | jermar | 1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
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3 | * All rights reserved. |
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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 | |||
1793 | jermar | 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> |
426 | jermar | 44 | |
1903 | jermar | 45 | #ifdef CONFIG_SMP |
46 | /** Entries locked in DTLB of BSP. |
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47 | * |
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48 | * Application processors need to have the same locked entries |
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49 | * in their DTLBs as the bootstrap processor. |
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50 | */ |
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51 | static struct { |
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52 | uintptr_t virt_page; |
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53 | uintptr_t phys_page; |
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54 | int pagesize_code; |
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55 | } bsp_locked_dtlb_entry[DTLB_ENTRY_COUNT]; |
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56 | |||
57 | /** Number of entries in bsp_locked_dtlb_entry array. */ |
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58 | static count_t bsp_locked_dtlb_entries = 0; |
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59 | #endif /* CONFIG_SMP */ |
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60 | |||
61 | /** Perform sparc64 specific initialization of paging. */ |
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426 | jermar | 62 | void page_arch_init(void) |
63 | { |
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1903 | jermar | 64 | if (config.cpu_active == 1) { |
65 | page_mapping_operations = &ht_mapping_operations; |
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66 | } else { |
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67 | |||
68 | #ifdef CONFIG_SMP |
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69 | int i; |
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70 | |||
71 | /* |
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72 | * Copy locked DTLB entries from the BSP. |
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73 | */ |
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74 | for (i = 0; i < bsp_locked_dtlb_entries; i++) { |
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75 | dtlb_insert_mapping(bsp_locked_dtlb_entry[i].virt_page, |
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76 | bsp_locked_dtlb_entry[i].phys_page, bsp_locked_dtlb_entry[i].pagesize_code, |
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77 | true, false); |
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78 | } |
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79 | #endif |
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80 | |||
81 | } |
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426 | jermar | 82 | } |
1382 | decky | 83 | |
1841 | jermar | 84 | /** Map memory-mapped device into virtual memory. |
85 | * |
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86 | * So far, only DTLB is used to map devices into memory. |
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87 | * Chances are that there will be only a limited amount of |
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88 | * devices that the kernel itself needs to lock in DTLB. |
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89 | * |
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90 | * @param physaddr Physical address of the page where the |
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91 | * device is located. Must be at least |
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92 | * page-aligned. |
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93 | * @param size Size of the device's registers. Must not |
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94 | * exceed 4M and must include extra space |
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95 | * caused by the alignment. |
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96 | * |
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97 | * @return Virtual address of the page where the device is |
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98 | * mapped. |
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99 | */ |
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1780 | jermar | 100 | uintptr_t hw_map(uintptr_t physaddr, size_t size) |
1382 | decky | 101 | { |
102 | unsigned int order; |
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1410 | jermar | 103 | int i; |
104 | |||
1903 | jermar | 105 | ASSERT(config.cpu_active == 1); |
106 | |||
1410 | jermar | 107 | struct { |
1903 | jermar | 108 | int pagesize_code; |
1410 | jermar | 109 | size_t increment; |
110 | count_t count; |
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111 | } sizemap[] = { |
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112 | { PAGESIZE_8K, 0, 1 }, /* 8K */ |
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113 | { PAGESIZE_8K, PAGE_SIZE, 2 }, /* 16K */ |
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114 | { PAGESIZE_8K, PAGE_SIZE, 4 }, /* 32K */ |
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115 | { PAGESIZE_64K, 0, 1}, /* 64K */ |
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116 | { PAGESIZE_64K, 8*PAGE_SIZE, 2 }, /* 128K */ |
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117 | { PAGESIZE_64K, 8*PAGE_SIZE, 4 }, /* 256K */ |
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118 | { PAGESIZE_512K, 0, 1 }, /* 512K */ |
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119 | { PAGESIZE_512K, 64*PAGE_SIZE, 2 }, /* 1M */ |
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120 | { PAGESIZE_512K, 64*PAGE_SIZE, 4 }, /* 2M */ |
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121 | { PAGESIZE_4M, 0, 1 } /* 4M */ |
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1917 | jermar | 122 | { PAGESIZE_4M, 512*PAGE_SIZE, 2 } /* 8M */ |
1410 | jermar | 123 | }; |
1382 | decky | 124 | |
1841 | jermar | 125 | ASSERT(ALIGN_UP(physaddr, PAGE_SIZE) == physaddr); |
1917 | jermar | 126 | ASSERT(size <= 8*1024*1024); |
1410 | jermar | 127 | |
1382 | decky | 128 | if (size <= FRAME_SIZE) |
129 | order = 0; |
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130 | else |
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1888 | jermar | 131 | order = (fnzb64(size - 1) + 1) - FRAME_WIDTH; |
1793 | jermar | 132 | |
133 | /* |
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134 | * Use virtual addresses that are beyond the limit of physical memory. |
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135 | * Thus, the physical address space will not be wasted by holes created |
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136 | * by frame_alloc(). |
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137 | */ |
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138 | ASSERT(last_frame); |
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139 | uintptr_t virtaddr = ALIGN_UP(last_frame, 1<<(order + FRAME_WIDTH)); |
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140 | last_frame = ALIGN_UP(virtaddr + size, 1<<(order + FRAME_WIDTH)); |
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1382 | decky | 141 | |
1903 | jermar | 142 | for (i = 0; i < sizemap[order].count; i++) { |
143 | /* |
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144 | * First, insert the mapping into DTLB. |
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145 | */ |
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1410 | jermar | 146 | dtlb_insert_mapping(virtaddr + i*sizemap[order].increment, |
147 | physaddr + i*sizemap[order].increment, |
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1903 | jermar | 148 | sizemap[order].pagesize_code, true, false); |
1382 | decky | 149 | |
1903 | jermar | 150 | #ifdef CONFIG_SMP |
151 | /* |
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152 | * Second, save the information about the mapping for APs. |
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153 | */ |
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154 | bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].virt_page = virtaddr + i*sizemap[order].increment; |
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155 | bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].phys_page = physaddr + i*sizemap[order].increment; |
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156 | bsp_locked_dtlb_entry[bsp_locked_dtlb_entries].pagesize_code = sizemap[order].pagesize_code; |
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157 | bsp_locked_dtlb_entries++; |
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158 | #endif |
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159 | } |
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160 | |||
1382 | decky | 161 | return virtaddr; |
162 | } |
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1702 | cejka | 163 | |
1793 | jermar | 164 | /** @} |
1702 | cejka | 165 | */ |