| 0,0 → 1,154 |
|---|
| /* |
| * 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" |
| #include "_components.h" |
| |
| #define HEAP_GAP 1024000 |
| |
| bootinfo_t bootinfo; |
| |
| |
| static void check_align(const void *addr, const char *desc) |
| { |
| if ((unsigned long) 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 long *top) |
| { |
| if ((unsigned long) *pa + PAGE_SIZE < *top) { |
| printf("Warning: %s overlaps kernel physical area\n", desc); |
| |
| void *new_va = (void *) (ALIGN_UP((unsigned long) 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 long) 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 PPC Bootloader\n"); |
| |
| init_components(); |
| |
| unsigned int i; |
| |
| for (i = 0; i < COMPONENTS; i++) |
| check_align(components[i].start, components[i].name); |
| |
| 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); |
| |
| printf("\nMemory statistics (total %d MB)\n", bootinfo.memmap.total >> 20); |
| printf(" %L: boot info structure (physical %L)\n", &bootinfo, bootinfo_pa); |
| printf(" %L: bootstrap trampoline (physical %L)\n", &real_mode, real_mode_pa); |
| printf(" %L: translation table (physical %L)\n", &trans, trans_pa); |
| for (i = 0; i < COMPONENTS; i++) |
| printf(" %L: %s image (size %d bytes)\n", components[i].start, components[i].name, components[i].size); |
| |
| unsigned long top = 0; |
| for (i = 0; i < COMPONENTS; i++) |
| top += ALIGN_UP(components[i].size, PAGE_SIZE); |
| |
| unsigned long pages = ALIGN_UP(KERNEL_SIZE, PAGE_SIZE) >> PAGE_WIDTH; |
| |
| for (i = 0; i < pages; i++) { |
| void *pa = ofw_translate(KERNEL_START + (i << PAGE_WIDTH)); |
| fix_overlap(KERNEL_START + (i << PAGE_WIDTH), &pa, "kernel", &top); |
| trans[i] = pa; |
| } |
| |
| bootinfo.taskmap.count = 0; |
| for (i = 1; i < COMPONENTS; i++) { |
| unsigned long component_pages = ALIGN_UP(components[i].size, PAGE_SIZE) >> PAGE_WIDTH; |
| unsigned long j; |
| |
| for (j = 0; j < component_pages; j++) { |
| void *pa = ofw_translate(components[i].start + (j << PAGE_WIDTH)); |
| fix_overlap(components[i].start + (j << PAGE_WIDTH), &pa, components[i].name, &top); |
| trans[pages + j] = pa; |
| if (j == 0) { |
| bootinfo.taskmap.tasks[bootinfo.taskmap.count].addr = (void *) (pages << PAGE_WIDTH); |
| bootinfo.taskmap.tasks[bootinfo.taskmap.count].size = components[i].size; |
| bootinfo.taskmap.count++; |
| } |
| } |
| |
| pages += component_pages; |
| } |
| |
| 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, pages << PAGE_WIDTH, real_mode_pa); |
| } |