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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_PHYSICAL_ADDRESS 0x0000 |
- | |
34 | #define KERNEL_VIRTUAL_ADDRESS 0x80000000 |
- | |
35 | #define KERNEL_BOOT_OFFSET 0x2000 |
- | |
36 | #define KERNEL_START &_binary_____________kernel_kernel_bin_start |
33 | #define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start) |
37 | #define KERNEL_END &_binary_____________kernel_kernel_bin_end |
34 | #define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end) |
38 | #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START) |
35 | #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START) |
39 | 36 | ||
40 | memmap_t memmap; |
37 | memmap_t memmap; |
41 | 38 | ||
- | 39 | ||
- | 40 | static void check_align(const void *addr, const char *desc) |
|
- | 41 | { |
|
- | 42 | if ((unsigned int) addr % PAGE_SIZE != 0) { |
|
- | 43 | printf("Error: %s not on page boundary\n", desc); |
|
- | 44 | halt(); |
|
- | 45 | } |
|
- | 46 | } |
|
- | 47 | ||
- | 48 | ||
42 | void bootstrap(void) |
49 | void bootstrap(void) |
43 | { |
50 | { |
44 | printf("\nHelenOS PPC Bootloader\n"); |
51 | printf("\nHelenOS PPC Bootloader\n"); |
45 | 52 | ||
- | 53 | check_align(KERNEL_START, "Kernel image"); |
|
- | 54 | check_align(&real_mode, "Bootstrap trampoline"); |
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- | 55 | check_align(&trans, "Translation table"); |
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- | 56 | ||
- | 57 | void *real_mode_pa = ofw_translate(&real_mode); |
|
46 | void *phys = ofw_translate(&start); |
58 | void *trans_pa = ofw_translate(&trans); |
- | 59 | void *memmap_pa = ofw_translate(&memmap); |
|
- | 60 | ||
- | 61 | printf("Memory statistics\n"); |
|
- | 62 | printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE); |
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- | 63 | printf(" memory map at %L (physical %L)\n", &memmap, memmap_pa); |
|
- | 64 | printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa); |
|
47 | printf("loaded at %L (physical %L)\n", &start, phys); |
65 | printf(" translation table at %L (physical %L)\n", &trans, trans_pa); |
48 | 66 | ||
49 | if (!ofw_memmap(&memmap)) { |
67 | if (!ofw_memmap(&memmap)) { |
50 | printf("Unable to get memory map\n"); |
68 | printf("Unable to get memory map\n"); |
51 | halt(); |
69 | halt(); |
52 | } |
70 | } |
53 | printf("total memory %d MB\n", memmap.total >> 20); |
71 | printf("Total memory %d MB\n", memmap.total >> 20); |
54 | 72 | ||
- | 73 | unsigned int addr; |
|
- | 74 | unsigned int pages; |
|
55 | if (ofw_map((void *) KERNEL_PHYSICAL_ADDRESS, (void *) KERNEL_VIRTUAL_ADDRESS, KERNEL_SIZE + KERNEL_BOOT_OFFSET, 0) != 0) { |
75 | for (addr = 0, pages = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE, pages++) { |
- | 76 | void *pa = ofw_translate(KERNEL_START + addr); |
|
- | 77 | if ((unsigned int) pa < KERNEL_SIZE) { |
|
56 | printf("Unable to map kernel memory at %L (physical %L)\n", KERNEL_VIRTUAL_ADDRESS, KERNEL_PHYSICAL_ADDRESS); |
78 | printf("Error: Kernel image overlaps kernel physical area\n"); |
57 | halt(); |
79 | halt(); |
- | 80 | } |
|
- | 81 | trans[addr >> PAGE_WIDTH] = pa; |
|
58 | } |
82 | } |
59 | printf("kernel memory mapped at %L (physical %L, size %d bytes)\n", KERNEL_VIRTUAL_ADDRESS, KERNEL_PHYSICAL_ADDRESS, KERNEL_SIZE); |
- | |
60 | // FIXME: relocate the kernel in real mode |
- | |
61 | memcpy((void *) KERNEL_VIRTUAL_ADDRESS, KERNEL_START, KERNEL_SIZE); |
- | |
62 | - | ||
63 | // FIXME: proper hardware detection & mapping |
- | |
64 | ofw_map((void *) 0x84000000, (void *) 0xf0000000, 0x01000000, 0); |
- | |
65 | ofw_map((void *) 0x80816000, (void *) 0xf2000000, 0x00018000, 0); |
- | |
66 | 83 | ||
67 | void *tramp = ofw_translate(&real_mode); |
- | |
68 | printf("bootstrap trampoline at %L (physical %L)\n", &real_mode, tramp); |
- | |
69 | printf("Booting the kernel...\n"); |
84 | printf("Booting the kernel...\n"); |
70 | - | ||
71 | flush_instruction_cache(); |
- | |
72 | jump_to_kernel((void *) KERNEL_VIRTUAL_ADDRESS + KERNEL_BOOT_OFFSET, ofw_translate(&memmap), tramp); |
85 | jump_to_kernel(memmap_pa, trans_pa, pages, real_mode_pa); |
73 | } |
86 | } |