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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 | |
964 | decky | 37 | memmap_t memmap; |
38 | |||
1058 | decky | 39 | |
40 | static void check_align(const void *addr, const char *desc) |
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41 | { |
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42 | if ((unsigned int) addr % PAGE_SIZE != 0) { |
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43 | printf("Error: %s not on page boundary\n", desc); |
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44 | halt(); |
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45 | } |
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46 | } |
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47 | |||
48 | |||
1068 | decky | 49 | static void check_overlap(const void *addr, const char *desc) |
50 | { |
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51 | if ((unsigned int) addr < KERNEL_SIZE) { |
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52 | printf("Error: %s overlaps kernel physical area\n", desc); |
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53 | halt(); |
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54 | } |
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55 | } |
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56 | |||
57 | |||
885 | decky | 58 | void bootstrap(void) |
59 | { |
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953 | decky | 60 | printf("\nHelenOS PPC Bootloader\n"); |
885 | decky | 61 | |
1058 | decky | 62 | check_align(KERNEL_START, "Kernel image"); |
63 | check_align(&real_mode, "Bootstrap trampoline"); |
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64 | check_align(&trans, "Translation table"); |
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953 | decky | 65 | |
1068 | decky | 66 | if (!ofw_memmap(&memmap)) { |
67 | printf("Error: Unable to get memory map\n"); |
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68 | halt(); |
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69 | } |
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70 | |||
1058 | decky | 71 | void *real_mode_pa = ofw_translate(&real_mode); |
72 | void *trans_pa = ofw_translate(&trans); |
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73 | void *memmap_pa = ofw_translate(&memmap); |
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74 | |||
1068 | decky | 75 | check_overlap(real_mode_pa, "Bootstrap trampoline"); |
76 | check_overlap(trans_pa, "Translation table"); |
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77 | check_overlap(memmap_pa, "Memory map"); |
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78 | |||
79 | printf("Memory statistics (total %d MB)\n", memmap.total >> 20); |
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1058 | decky | 80 | printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE); |
81 | printf(" memory map at %L (physical %L)\n", &memmap, memmap_pa); |
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82 | printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa); |
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83 | printf(" translation table at %L (physical %L)\n", &trans, trans_pa); |
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84 | |||
85 | unsigned int addr; |
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1068 | decky | 86 | for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) { |
1058 | decky | 87 | void *pa = ofw_translate(KERNEL_START + addr); |
1068 | decky | 88 | check_overlap(pa, "Kernel image"); |
1058 | decky | 89 | trans[addr >> PAGE_WIDTH] = pa; |
885 | decky | 90 | } |
91 | |||
913 | decky | 92 | printf("Booting the kernel...\n"); |
1068 | decky | 93 | jump_to_kernel(memmap_pa, trans_pa, KERNEL_SIZE, real_mode_pa); |
885 | decky | 94 | } |