| 0,0 → 1,128 |
|---|
| /* |
| * Copyright (C) 2005 Martin Decky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "main.h" |
| #include "printf.h" |
| #include "asm.h" |
| |
| #define KERNEL_START ((void *) &_binary_____________kernel_kernel_bin_start) |
| #define KERNEL_END ((void *) &_binary_____________kernel_kernel_bin_end) |
| #define KERNEL_SIZE ((unsigned int) KERNEL_END - (unsigned int) KERNEL_START) |
| |
| #define HEAP_GAP 1024000 |
| |
| bootinfo_t bootinfo; |
| |
| |
| static void check_align(const void *addr, const char *desc) |
| { |
| if ((unsigned int) addr % PAGE_SIZE != 0) { |
| printf("Error: %s not on page boundary, halting.\n", desc); |
| halt(); |
| } |
| } |
| |
| |
| static void fix_overlap(void *va, void **pa, const char *desc, unsigned int *top) |
| { |
| if ((unsigned int) *pa + PAGE_SIZE < *top) { |
| printf("Warning: %s overlaps kernel physical area\n", desc); |
| |
| void *new_va = (void *) (ALIGN_UP((unsigned int) KERNEL_END + HEAP_GAP, PAGE_SIZE) + *top); |
| void *new_pa = (void *) (HEAP_GAP + *top); |
| *top += PAGE_SIZE; |
| |
| if (ofw_map(new_pa, new_va, PAGE_SIZE, 0) != 0) { |
| printf("Error: Unable to map page aligned memory at %L (physical %L), halting.\n", new_va, new_pa); |
| halt(); |
| } |
| |
| if ((unsigned int) new_pa + PAGE_SIZE < KERNEL_SIZE) { |
| printf("Error: %s cannot be relocated, halting.\n", desc); |
| halt(); |
| } |
| |
| printf("Relocating %L -> %L (physical %L -> %L)\n", va, new_va, *pa, new_pa); |
| *pa = new_pa; |
| memcpy(new_va, va, PAGE_SIZE); |
| } |
| } |
| |
| |
| void bootstrap(void) |
| { |
| printf("\nHelenOS PPC64 Bootloader\n"); |
| |
| check_align(KERNEL_START, "Kernel image"); |
| check_align(&real_mode, "Bootstrap trampoline"); |
| check_align(&trans, "Translation table"); |
| |
| if (!ofw_memmap(&bootinfo.memmap)) { |
| printf("Error: Unable to get memory map, halting.\n"); |
| halt(); |
| } |
| |
| if (bootinfo.memmap.total == 0) { |
| printf("Error: No memory detected, halting.\n"); |
| halt(); |
| } |
| |
| if (!ofw_screen(&bootinfo.screen)) { |
| printf("Error: Unable to get screen properties, halting.\n"); |
| halt(); |
| } |
| |
| printf("\nDevice statistics\n"); |
| 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); |
| |
| void *real_mode_pa = ofw_translate(&real_mode); |
| void *trans_pa = ofw_translate(&trans); |
| void *bootinfo_pa = ofw_translate(&bootinfo); |
| void *fb = (void *) (((unsigned int) bootinfo.screen.addr) & ((unsigned int) ~0 << 17)); |
| |
| printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20); |
| printf(" kernel image at %L (size %d bytes)\n", KERNEL_START, KERNEL_SIZE); |
| printf(" boot info at %L (physical %L)\n", &bootinfo, bootinfo_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); |
| |
| unsigned int top = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE); |
| unsigned int addr; |
| for (addr = 0; addr < KERNEL_SIZE; addr += PAGE_SIZE) { |
| void *pa = ofw_translate(KERNEL_START + addr); |
| fix_overlap(KERNEL_START + addr, &pa, "Kernel image", &top); |
| trans[addr >> PAGE_WIDTH] = pa; |
| } |
| |
| fix_overlap(&real_mode, &real_mode_pa, "Bootstrap trampoline", &top); |
| fix_overlap(&trans, &trans_pa, "Translation table", &top); |
| fix_overlap(&bootinfo, &bootinfo_pa, "Boot info", &top); |
| |
| printf("\nBooting the kernel...\n"); |
| jump_to_kernel(bootinfo_pa, sizeof(bootinfo), trans_pa, KERNEL_SIZE, fb, real_mode_pa); |
| } |