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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Martin Decky |
2 | * Copyright (C) 2005 Martin Decky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include "main.h" |
29 | #include "main.h" |
30 | #include "printf.h" |
30 | #include "printf.h" |
31 | #include "asm.h" |
31 | #include "asm.h" |
32 | 32 | ||
33 | #define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start) |
33 | #define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start) |
34 | #define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end) |
34 | #define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end) |
35 | #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START) |
35 | #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START) |
36 | 36 | ||
37 | #define HEAP_GAP 1024000 |
37 | #define HEAP_GAP 1024000 |
38 | 38 | ||
39 | typedef struct { |
- | |
40 | memmap_t memmap; |
- | |
41 | screen_t screen; |
- | |
42 | } bootinfo_t; |
- | |
43 | - | ||
44 | bootinfo_t bootinfo; |
39 | bootinfo_t bootinfo; |
45 | 40 | ||
46 | 41 | ||
47 | static void check_align(const void *addr, const char *desc) |
42 | static void check_align(const void *addr, const char *desc) |
48 | { |
43 | { |
49 | if ((unsigned int) addr % PAGE_SIZE != 0) { |
44 | if ((unsigned int) addr % PAGE_SIZE != 0) { |
50 | printf("Error: %s not on page boundary\n", desc); |
45 | printf("Error: %s not on page boundary\n", desc); |
51 | halt(); |
46 | halt(); |
52 | } |
47 | } |
53 | } |
48 | } |
54 | 49 | ||
55 | 50 | ||
56 | static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top) |
51 | static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top) |
57 | { |
52 | { |
58 | if ((unsigned int) *pa + PAGE_SIZE < *top) { |
53 | if ((unsigned int) *pa + PAGE_SIZE < *top) { |
59 | printf("Warning: %s overlaps kernel physical area\n", desc); |
54 | printf("Warning: %s overlaps kernel physical area\n", desc); |
60 | 55 | ||
61 | void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top); |
56 | void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top); |
62 | void *new_pa = (void *) (HEAP_GAP + *top); |
57 | void *new_pa = (void *) (HEAP_GAP + *top); |
63 | *top += PAGE_SIZE; |
58 | *top += PAGE_SIZE; |
64 | 59 | ||
65 | if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) { |
60 | if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) { |
66 | printf("Error: Unable to map page aligned memory at %L (physical %L)\n", new_va, new_pa); |
61 | printf("Error: Unable to map page aligned memory at %L (physical %L)\n", new_va, new_pa); |
67 | halt(); |
62 | halt(); |
68 | } |
63 | } |
69 | 64 | ||
70 | if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) { |
65 | if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) { |
71 | printf("Error: %s cannot be relocated\n", desc); |
66 | printf("Error: %s cannot be relocated\n", desc); |
72 | halt(); |
67 | halt(); |
73 | } |
68 | } |
74 | 69 | ||
75 | printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa); |
70 | printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa); |
76 | *pa = new_pa; |
71 | *pa = new_pa; |
77 | memcpy(new_va, va, PAGE_SIZE); |
72 | memcpy(new_va, va, PAGE_SIZE); |
78 | } |
73 | } |
79 | } |
74 | } |
80 | 75 | ||
81 | 76 | ||
82 | void bootstrap(void) |
77 | void bootstrap(void) |
83 | { |
78 | { |
84 | printf("\nHelenOS PPC Bootloader\n"); |
79 | printf("\nHelenOS PPC Bootloader\n"); |
85 | 80 | ||
86 | check_align(KERNEL_START, "Kernel image"); |
81 | check_align(KERNEL_START, "Kernel image"); |
87 | check_align(&real_mode, "Bootstrap trampoline"); |
82 | check_align(&real_mode, "Bootstrap trampoline"); |
88 | check_align(&trans, "Translation table"); |
83 | check_align(&trans, "Translation table"); |
89 | 84 | ||
90 | if (!ofw_memmap(&bootinfo.memmap)) { |
85 | if (!ofw_memmap(&bootinfo.memmap)) { |
91 | printf("Error: Unable to get memory map\n"); |
86 | printf("Error: Unable to get memory map\n"); |
92 | halt(); |
87 | halt(); |
93 | } |
88 | } |
94 | 89 | ||
95 | if (!ofw_screen(&bootinfo.screen)) { |
90 | if (!ofw_screen(&bootinfo.screen)) { |
96 | printf("Error: Unable to get screen properties\n"); |
91 | printf("Error: Unable to get screen properties\n"); |
97 | halt(); |
92 | halt(); |
98 | } |
93 | } |
99 | 94 | ||
100 | printf("\nDevice statistics\n"); |
95 | printf("\nDevice statistics\n"); |
101 | 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); |
96 | 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); |
102 | 97 | ||
103 | void *real_mode_pa = ofw_translate(&real_mode); |
98 | void *real_mode_pa = ofw_translate(&real_mode); |
104 | void *trans_pa = ofw_translate(&trans); |
99 | void *trans_pa = ofw_translate(&trans); |
105 | void *bootinfo_pa = ofw_translate(&bootinfo); |
100 | void *bootinfo_pa = ofw_translate(&bootinfo); |
106 | 101 | ||
107 | printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20); |
102 | printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20); |
108 | printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE); |
103 | printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE); |
109 | printf(" boot info at %L (physical %L)\n", &bootinfo, bootinfo_pa); |
104 | printf(" boot info at %L (physical %L)\n", &bootinfo, bootinfo_pa); |
110 | printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa); |
105 | printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa); |
111 | printf(" translation table at %L (physical %L)\n", &trans, trans_pa); |
106 | printf(" translation table at %L (physical %L)\n", &trans, trans_pa); |
112 | 107 | ||
113 | unsigned int top = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE); |
108 | unsigned int top = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE); |
114 | unsigned int addr; |
109 | unsigned int addr; |
115 | for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) { |
110 | for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) { |
116 | void *pa = ofw_translate(KERNEL_START + addr); |
111 | void *pa = ofw_translate(KERNEL_START + addr); |
117 | fix_overlap(KERNEL_START + addr, &pa, "Kernel image", &top); |
112 | fix_overlap(KERNEL_START + addr, &pa, "Kernel image", &top); |
118 | trans[addr >> PAGE_WIDTH] = pa; |
113 | trans[addr >> PAGE_WIDTH] = pa; |
119 | } |
114 | } |
120 | 115 | ||
121 | fix_overlap(&real_mode, &real_mode_pa, "Bootstrap trampoline", &top); |
116 | fix_overlap(&real_mode, &real_mode_pa, "Bootstrap trampoline", &top); |
122 | fix_overlap(&trans, &trans_pa, "Translation table", &top); |
117 | fix_overlap(&trans, &trans_pa, "Translation table", &top); |
123 | fix_overlap(&bootinfo, &bootinfo_pa, "Boot info", &top); |
118 | fix_overlap(&bootinfo, &bootinfo_pa, "Boot info", &top); |
124 | 119 | ||
125 | printf("\nBooting the kernel...\n"); |
120 | printf("\nBooting the kernel...\n"); |
126 | jump_to_kernel(bootinfo_pa, trans_pa, KERNEL_SIZE, real_mode_pa); |
121 | jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, KERNEL_SIZE, real_mode_pa); |
127 | } |
122 | } |
128 | 123 |