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885 | 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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30 | #include "printf.h" |
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913 | decky | 31 | #include "asm.h" |
1369 | decky | 32 | #include "_components.h" |
885 | decky | 33 | |
1075 | decky | 34 | #define HEAP_GAP 1024000 |
35 | |||
1130 | decky | 36 | bootinfo_t bootinfo; |
1058 | decky | 37 | |
1130 | decky | 38 | |
1058 | decky | 39 | static void check_align(const void *addr, const char *desc) |
40 | { |
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41 | if ((unsigned int) addr % PAGE_SIZE != 0) { |
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1146 | decky | 42 | printf("Error: %s not on page boundary, halting.\n", desc); |
1058 | decky | 43 | halt(); |
44 | } |
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45 | } |
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46 | |||
47 | |||
1075 | decky | 48 | static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top) |
1068 | decky | 49 | { |
1075 | decky | 50 | if ((unsigned int) *pa + PAGE_SIZE < *top) { |
51 | printf("Warning: %s overlaps kernel physical area\n", desc); |
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52 | |||
53 | void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top); |
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54 | void *new_pa = (void *) (HEAP_GAP + *top); |
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55 | *top += PAGE_SIZE; |
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56 | |||
57 | if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) { |
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1146 | decky | 58 | printf("Error: Unable to map page aligned memory at %L (physical %L), halting.\n", new_va, new_pa); |
1075 | decky | 59 | halt(); |
60 | } |
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61 | |||
62 | if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) { |
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1146 | decky | 63 | printf("Error: %s cannot be relocated, halting.\n", desc); |
1075 | decky | 64 | halt(); |
65 | } |
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66 | |||
67 | printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa); |
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68 | *pa = new_pa; |
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69 | memcpy(new_va, va, PAGE_SIZE); |
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1068 | decky | 70 | } |
71 | } |
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72 | |||
73 | |||
885 | decky | 74 | void bootstrap(void) |
75 | { |
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953 | decky | 76 | printf("\nHelenOS PPC Bootloader\n"); |
885 | decky | 77 | |
1369 | decky | 78 | init_components(); |
953 | decky | 79 | |
1369 | decky | 80 | unsigned int i; |
81 | |||
82 | for (i = 0; i < COMPONENTS; i++) |
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83 | check_align(components[i].start, components[i].name); |
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84 | |||
85 | check_align(&real_mode, "bootstrap trampoline"); |
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86 | check_align(&trans, "translation table"); |
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87 | |||
1130 | decky | 88 | if (!ofw_memmap(&bootinfo.memmap)) { |
1369 | decky | 89 | printf("Error: unable to get memory map, halting.\n"); |
1068 | decky | 90 | halt(); |
91 | } |
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92 | |||
1146 | decky | 93 | if (bootinfo.memmap.total == 0) { |
1369 | decky | 94 | printf("Error: no memory detected, halting.\n"); |
1146 | decky | 95 | halt(); |
96 | } |
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97 | |||
1130 | decky | 98 | if (!ofw_screen(&bootinfo.screen)) { |
1369 | decky | 99 | printf("Error: unable to get screen properties, halting.\n"); |
1130 | decky | 100 | halt(); |
101 | } |
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102 | |||
1620 | decky | 103 | if (!ofw_keyboard(&bootinfo.keyboard)) { |
104 | printf("Error: unable to get keyboard properties, halting.\n"); |
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105 | halt(); |
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106 | } |
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107 | |||
1130 | decky | 108 | printf("\nDevice statistics\n"); |
109 | 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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1620 | decky | 110 | printf(" keyboard at %L (size %d bytes)\n", bootinfo.keyboard.addr, bootinfo.keyboard.size); |
1130 | decky | 111 | |
1058 | decky | 112 | void *real_mode_pa = ofw_translate(&real_mode); |
113 | void *trans_pa = ofw_translate(&trans); |
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1130 | decky | 114 | void *bootinfo_pa = ofw_translate(&bootinfo); |
1058 | decky | 115 | |
1130 | decky | 116 | printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20); |
1369 | decky | 117 | printf(" %L: boot info structure (physical %L)\n", &bootinfo, bootinfo_pa); |
118 | printf(" %L: bootstrap trampoline (physical %L)\n", &real_mode, real_mode_pa); |
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119 | printf(" %L: translation table (physical %L)\n", &trans, trans_pa); |
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120 | for (i = 0; i < COMPONENTS; i++) |
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121 | printf(" %L: %s image (size %d bytes)\n", components[i].start, components[i].name, components[i].size); |
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1058 | decky | 122 | |
1369 | decky | 123 | unsigned int top = 0; |
124 | for (i = 0; i < COMPONENTS; i++) |
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125 | top += ALIGN_UP(components[i].size, PAGE_SIZE); |
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1219 | decky | 126 | |
1369 | decky | 127 | unsigned int pages = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) >> PAGE_WIDTH; |
1219 | decky | 128 | |
1369 | decky | 129 | for (i = 0; i < pages; i++) { |
1219 | decky | 130 | void *pa = ofw_translate(KERNEL_START + (i << PAGE_WIDTH)); |
1369 | decky | 131 | fix_overlap(KERNEL_START + (i << PAGE_WIDTH), &pa, "kernel", &top); |
1219 | decky | 132 | trans[i] = pa; |
885 | decky | 133 | } |
134 | |||
1369 | decky | 135 | bootinfo.taskmap.count = 0; |
136 | for (i = 1; i < COMPONENTS; i++) { |
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137 | unsigned int component_pages = ALIGN_UP(components[i].size, PAGE_SIZE) >> PAGE_WIDTH; |
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138 | unsigned int j; |
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139 | |||
140 | for (j = 0; j < component_pages; j++) { |
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141 | void *pa = ofw_translate(components[i].start + (j << PAGE_WIDTH)); |
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142 | fix_overlap(components[i].start + (j << PAGE_WIDTH), &pa, components[i].name, &top); |
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143 | trans[pages + j] = pa; |
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144 | if (j == 0) { |
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145 | bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr = (void *) (pages << PAGE_WIDTH); |
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146 | bootinfo.taskmap.tasks[bootinfo.taskmap.count].size = components[i].size; |
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147 | bootinfo.taskmap.count++; |
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148 | } |
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1219 | decky | 149 | } |
1369 | decky | 150 | |
151 | pages += component_pages; |
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1219 | decky | 152 | } |
153 | |||
1369 | decky | 154 | fix_overlap(&real_mode, &real_mode_pa, "bootstrap trampoline", &top); |
155 | fix_overlap(&trans, &trans_pa, "translation table", &top); |
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156 | fix_overlap(&bootinfo, &bootinfo_pa, "boot info", &top); |
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1075 | decky | 157 | |
1130 | decky | 158 | printf("\nBooting the kernel...\n"); |
1478 | decky | 159 | jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, pages << PAGE_WIDTH, real_mode_pa, bootinfo.screen.addr, bootinfo.screen.scanline); |
885 | decky | 160 | } |