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Rev | Author | Line No. | Line |
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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" |
885 | decky | 32 | |
1058 | decky | 33 | #define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start) |
34 | #define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end) |
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913 | decky | 35 | #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START) |
887 | decky | 36 | |
1219 | decky | 37 | #define INIT_START ((void *) &_binary_____________uspace_init_init_start) |
38 | #define INIT_END ((void *) &_binary_____________uspace_init_init_end) |
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39 | #define INIT_SIZE ((unsigned int) INIT_END - (unsigned int) INIT_START) |
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40 | |||
1075 | decky | 41 | #define HEAP_GAP 1024000 |
42 | |||
1130 | decky | 43 | bootinfo_t bootinfo; |
1058 | decky | 44 | |
1130 | decky | 45 | |
1058 | decky | 46 | static void check_align(const void *addr, const char *desc) |
47 | { |
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48 | if ((unsigned int) addr % PAGE_SIZE != 0) { |
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1146 | decky | 49 | printf("Error: %s not on page boundary, halting.\n", desc); |
1058 | decky | 50 | halt(); |
51 | } |
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52 | } |
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53 | |||
54 | |||
1075 | decky | 55 | static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top) |
1068 | decky | 56 | { |
1075 | decky | 57 | if ((unsigned int) *pa + PAGE_SIZE < *top) { |
58 | printf("Warning: %s overlaps kernel physical area\n", desc); |
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59 | |||
60 | void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top); |
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61 | void *new_pa = (void *) (HEAP_GAP + *top); |
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62 | *top += PAGE_SIZE; |
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63 | |||
64 | if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) { |
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1146 | decky | 65 | printf("Error: Unable to map page aligned memory at %L (physical %L), halting.\n", new_va, new_pa); |
1075 | decky | 66 | halt(); |
67 | } |
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68 | |||
69 | if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) { |
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1146 | decky | 70 | printf("Error: %s cannot be relocated, halting.\n", desc); |
1075 | decky | 71 | halt(); |
72 | } |
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73 | |||
74 | printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa); |
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75 | *pa = new_pa; |
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76 | memcpy(new_va, va, PAGE_SIZE); |
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1068 | decky | 77 | } |
78 | } |
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79 | |||
80 | |||
885 | decky | 81 | void bootstrap(void) |
82 | { |
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953 | decky | 83 | printf("\nHelenOS PPC Bootloader\n"); |
885 | decky | 84 | |
1058 | decky | 85 | check_align(KERNEL_START, "Kernel image"); |
1219 | decky | 86 | check_align(INIT_START, "Init image"); |
1058 | decky | 87 | check_align(&real_mode, "Bootstrap trampoline"); |
88 | check_align(&trans, "Translation table"); |
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953 | decky | 89 | |
1130 | decky | 90 | if (!ofw_memmap(&bootinfo.memmap)) { |
1146 | decky | 91 | printf("Error: Unable to get memory map, halting.\n"); |
1068 | decky | 92 | halt(); |
93 | } |
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94 | |||
1146 | decky | 95 | if (bootinfo.memmap.total == 0) { |
96 | printf("Error: No memory detected, halting.\n"); |
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97 | halt(); |
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98 | } |
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99 | |||
1130 | decky | 100 | if (!ofw_screen(&bootinfo.screen)) { |
1146 | decky | 101 | printf("Error: Unable to get screen properties, halting.\n"); |
1130 | decky | 102 | halt(); |
103 | } |
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104 | |||
105 | printf("\nDevice statistics\n"); |
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106 | 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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107 | |||
1058 | decky | 108 | void *real_mode_pa = ofw_translate(&real_mode); |
109 | void *trans_pa = ofw_translate(&trans); |
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1130 | decky | 110 | void *bootinfo_pa = ofw_translate(&bootinfo); |
1146 | decky | 111 | void *fb = (void *) (((unsigned int) bootinfo.screen.addr) & ((unsigned int) ~0 << 17)); |
1058 | decky | 112 | |
1130 | decky | 113 | printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20); |
1058 | decky | 114 | printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE); |
1219 | decky | 115 | printf(" init image at %L (size %d bytes)\n", INIT_START, INIT_SIZE); |
116 | printf(" boot info structure at %L (physical %L)\n", &bootinfo, bootinfo_pa); |
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1058 | decky | 117 | printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa); |
118 | printf(" translation table at %L (physical %L)\n", &trans, trans_pa); |
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119 | |||
1219 | decky | 120 | unsigned int top = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) + ALIGN_UP(INIT_SIZE, PAGE_SIZE); |
121 | unsigned int kernel_pages = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) >> PAGE_WIDTH; |
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122 | unsigned int init_pages = ALIGN_UP(INIT_SIZE, PAGE_SIZE) >> PAGE_WIDTH; |
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123 | |||
124 | unsigned int i; |
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125 | |||
126 | for (i = 0; i < kernel_pages; i++) { |
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127 | void *pa = ofw_translate(KERNEL_START + (i << PAGE_WIDTH)); |
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128 | fix_overlap(KERNEL_START + (i << PAGE_WIDTH), &pa, "Kernel image", &top); |
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129 | trans[i] = pa; |
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885 | decky | 130 | } |
131 | |||
1219 | decky | 132 | for (i = 0; i < init_pages; i++) { |
133 | void *pa = ofw_translate(INIT_START + (i << PAGE_WIDTH)); |
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134 | fix_overlap(INIT_START + (i << PAGE_WIDTH), &pa, "Init image", &top); |
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135 | trans[kernel_pages + i] = pa; |
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136 | if (i == 0) { |
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137 | bootinfo.init.addr = (void *) ((kernel_pages + i) << PAGE_WIDTH); |
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138 | bootinfo.init.size = INIT_SIZE; |
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139 | } |
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140 | } |
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141 | |||
1075 | decky | 142 | fix_overlap(&real_mode, &real_mode_pa, "Bootstrap trampoline", &top); |
143 | fix_overlap(&trans, &trans_pa, "Translation table", &top); |
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1130 | decky | 144 | fix_overlap(&bootinfo, &bootinfo_pa, "Boot info", &top); |
1075 | decky | 145 | |
1130 | decky | 146 | printf("\nBooting the kernel...\n"); |
1219 | decky | 147 | jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, (kernel_pages + init_pages) << PAGE_WIDTH, fb, real_mode_pa); |
885 | decky | 148 | } |