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1157 | decky | 1 | /* |
2 | * Copyright (C) 2005 Martin Decky |
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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 | |||
29 | #include "main.h" |
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1765 | jermar | 30 | #include <printf.h> |
1157 | decky | 31 | #include "asm.h" |
1395 | decky | 32 | #include "_components.h" |
1789 | jermar | 33 | #include <ofw.h> |
1157 | decky | 34 | |
35 | #define HEAP_GAP 1024000 |
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36 | |||
37 | bootinfo_t bootinfo; |
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38 | |||
39 | |||
40 | static void check_align(const void *addr, const char *desc) |
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41 | { |
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1166 | decky | 42 | if ((unsigned long) addr % PAGE_SIZE != 0) { |
1157 | decky | 43 | printf("Error: %s not on page boundary, halting.\n", desc); |
44 | halt(); |
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45 | } |
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46 | } |
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47 | |||
48 | |||
1166 | decky | 49 | static void fix_overlap(void *va, void **pa, const char *desc, unsigned long *top) |
1157 | decky | 50 | { |
1166 | decky | 51 | if ((unsigned long) *pa + PAGE_SIZE < *top) { |
1157 | decky | 52 | printf("Warning: %s overlaps kernel physical area\n", desc); |
53 | |||
1166 | decky | 54 | void *new_va = (void *) (ALIGN_UP((unsigned long) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top); |
1157 | decky | 55 | void *new_pa = (void *) (HEAP_GAP + *top); |
56 | *top += PAGE_SIZE; |
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57 | |||
58 | if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) { |
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59 | printf("Error: Unable to map page aligned memory at %L (physical %L), halting.\n", new_va, new_pa); |
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60 | halt(); |
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61 | } |
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62 | |||
1166 | decky | 63 | if ((unsigned long) new_pa + PAGE_SIZE < KERNEL_SIZE) { |
1157 | decky | 64 | printf("Error: %s cannot be relocated, halting.\n", desc); |
65 | halt(); |
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66 | } |
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67 | |||
68 | printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa); |
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69 | *pa = new_pa; |
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70 | memcpy(new_va, va, PAGE_SIZE); |
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71 | } |
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72 | } |
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73 | |||
74 | |||
75 | void bootstrap(void) |
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76 | { |
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1395 | decky | 77 | printf("\nHelenOS PPC Bootloader\n"); |
1157 | decky | 78 | |
1395 | decky | 79 | init_components(); |
1157 | decky | 80 | |
1395 | decky | 81 | unsigned int i; |
82 | |||
83 | for (i = 0; i < COMPONENTS; i++) |
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84 | check_align(components[i].start, components[i].name); |
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85 | |||
86 | check_align(&real_mode, "bootstrap trampoline"); |
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87 | check_align(&trans, "translation table"); |
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88 | |||
1157 | decky | 89 | if (!ofw_memmap(&bootinfo.memmap)) { |
1395 | decky | 90 | printf("Error: unable to get memory map, halting.\n"); |
1157 | decky | 91 | halt(); |
92 | } |
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93 | |||
94 | if (bootinfo.memmap.total == 0) { |
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1395 | decky | 95 | printf("Error: no memory detected, halting.\n"); |
1157 | decky | 96 | halt(); |
97 | } |
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98 | |||
99 | if (!ofw_screen(&bootinfo.screen)) { |
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1395 | decky | 100 | printf("Error: unable to get screen properties, halting.\n"); |
1157 | decky | 101 | halt(); |
102 | } |
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103 | |||
104 | printf("\nDevice statistics\n"); |
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105 | printf(" screen at %L, resolution %dx%d, %d bpp (scanline %d bytes)\n", bootinfo.screen.addr, bootinfo.screen.width, bootinfo.screen.height, bootinfo.screen.bpp, bootinfo.screen.scanline); |
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106 | |||
107 | void *real_mode_pa = ofw_translate(&real_mode); |
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108 | void *trans_pa = ofw_translate(&trans); |
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109 | void *bootinfo_pa = ofw_translate(&bootinfo); |
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110 | |||
111 | printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20); |
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1395 | decky | 112 | printf(" %L: boot info structure (physical %L)\n", &bootinfo, bootinfo_pa); |
113 | printf(" %L: bootstrap trampoline (physical %L)\n", &real_mode, real_mode_pa); |
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114 | printf(" %L: translation table (physical %L)\n", &trans, trans_pa); |
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115 | for (i = 0; i < COMPONENTS; i++) |
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116 | printf(" %L: %s image (size %d bytes)\n", components[i].start, components[i].name, components[i].size); |
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1157 | decky | 117 | |
1395 | decky | 118 | unsigned long top = 0; |
119 | for (i = 0; i < COMPONENTS; i++) |
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120 | top += ALIGN_UP(components[i].size, PAGE_SIZE); |
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121 | |||
122 | unsigned long pages = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) >> PAGE_WIDTH; |
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123 | |||
124 | for (i = 0; i < pages; i++) { |
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125 | void *pa = ofw_translate(KERNEL_START + (i << PAGE_WIDTH)); |
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126 | fix_overlap(KERNEL_START + (i << PAGE_WIDTH), &pa, "kernel", &top); |
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127 | trans[i] = pa; |
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1157 | decky | 128 | } |
129 | |||
1395 | decky | 130 | bootinfo.taskmap.count = 0; |
131 | for (i = 1; i < COMPONENTS; i++) { |
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132 | unsigned long component_pages = ALIGN_UP(components[i].size, PAGE_SIZE) >> PAGE_WIDTH; |
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133 | unsigned long j; |
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134 | |||
135 | for (j = 0; j < component_pages; j++) { |
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136 | void *pa = ofw_translate(components[i].start + (j << PAGE_WIDTH)); |
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137 | fix_overlap(components[i].start + (j << PAGE_WIDTH), &pa, components[i].name, &top); |
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138 | trans[pages + j] = pa; |
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139 | if (j == 0) { |
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140 | bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr = (void *) (pages << PAGE_WIDTH); |
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141 | bootinfo.taskmap.tasks[bootinfo.taskmap.count].size = components[i].size; |
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142 | bootinfo.taskmap.count++; |
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143 | } |
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144 | } |
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145 | |||
146 | pages += component_pages; |
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147 | } |
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1157 | decky | 148 | |
1395 | decky | 149 | fix_overlap(&real_mode, &real_mode_pa, "bootstrap trampoline", &top); |
150 | fix_overlap(&trans, &trans_pa, "translation table", &top); |
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151 | fix_overlap(&bootinfo, &bootinfo_pa, "boot info", &top); |
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152 | |||
1157 | decky | 153 | printf("\nBooting the kernel...\n"); |
1395 | decky | 154 | jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, pages << PAGE_WIDTH, real_mode_pa); |
1157 | decky | 155 | } |