| 46,6 → 46,15 |
|---|
| } |
| |
| |
| static void check_overlap(const void *addr, const char *desc) |
| { |
| if ((unsigned int) addr < KERNEL_SIZE) { |
| printf("Error: %s overlaps kernel physical area\n", desc); |
| halt(); |
| } |
| } |
| |
| |
| void bootstrap(void) |
| { |
| printf("\nHelenOS PPC Bootloader\n"); |
| 54,33 → 63,32 |
|---|
| check_align(&real_mode, "Bootstrap trampoline"); |
| check_align(&trans, "Translation table"); |
| |
| if (!ofw_memmap(&memmap)) { |
| printf("Error: Unable to get memory map\n"); |
| halt(); |
| } |
| |
| void *real_mode_pa = ofw_translate(&real_mode); |
| void *trans_pa = ofw_translate(&trans); |
| void *memmap_pa = ofw_translate(&memmap); |
| |
| printf("Memory statistics\n"); |
| check_overlap(real_mode_pa, "Bootstrap trampoline"); |
| check_overlap(trans_pa, "Translation table"); |
| check_overlap(memmap_pa, "Memory map"); |
| |
| printf("Memory statistics (total %d MB)\n", memmap.total >> 20); |
| printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE); |
| printf(" memory map at %L (physical %L)\n", &memmap, memmap_pa); |
| printf(" bootstrap trampoline at %L (physical %L)\n", &real_mode, real_mode_pa); |
| printf(" translation table at %L (physical %L)\n", &trans, trans_pa); |
| |
| if (!ofw_memmap(&memmap)) { |
| printf("Unable to get memory map\n"); |
| halt(); |
| } |
| printf("Total memory %d MB\n", memmap.total >> 20); |
| |
| unsigned int addr; |
| unsigned int pages; |
| for (addr = 0, pages = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE, pages++) { |
| for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) { |
| void *pa = ofw_translate(KERNEL_START + addr); |
| if ((unsigned int) pa < KERNEL_SIZE) { |
| printf("Error: Kernel image overlaps kernel physical area\n"); |
| halt(); |
| } |
| check_overlap(pa, "Kernel image"); |
| trans[addr >> PAGE_WIDTH] = pa; |
| } |
| |
| printf("Booting the kernel...\n"); |
| jump_to_kernel(memmap_pa, trans_pa, pages, real_mode_pa); |
| jump_to_kernel(memmap_pa, trans_pa, KERNEL_SIZE, real_mode_pa); |
| } |