| /* |
| * Copyright 2013 Google Inc. |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "arch/x86/zeropage.h" |
| #include "boot/boot.h" |
| |
| int boot(void *kernel, char *cmd_line, void *params, void *loader, |
| void *ram_disk, size_t ram_disk_size) |
| { |
| // If nobody's prepared the boot_params structure for us already, |
| // do that now. |
| if (!params) { |
| const int SectSize = 512; |
| |
| struct boot_params *bparams = (struct boot_params *)kernel; |
| |
| // Find the kernel header. |
| struct setup_header *header = &bparams->hdr; |
| uintptr_t header_start = (uintptr_t)header; |
| uintptr_t header_end = (uintptr_t)&header->jump + |
| ((header->jump >> 8) & 0xff); |
| uintptr_t header_size = header_end - header_start; |
| |
| // Prepare the boot params (zeropage). |
| static struct boot_params tmp_params; |
| memset(&tmp_params, 0, sizeof(tmp_params)); |
| memcpy(&tmp_params.hdr, header, header_size); |
| params = &tmp_params; |
| |
| // Move the protected mode part of the kernel into place. |
| uintptr_t pm_offset = (header->setup_sects + 1) * SectSize; |
| uintptr_t pm_size = header->syssize * 16; |
| uintptr_t pm_start = (uintptr_t)kernel + pm_offset; |
| memmove(kernel, (void *)pm_start, pm_size); |
| } |
| |
| if (CONFIG_TARGET_OS_LINUX) { |
| return boot_x86_linux(params, cmd_line, kernel, 0, |
| ram_disk, ram_disk_size); |
| } else if (CONFIG_TARGET_OS_MAGENTA) { |
| return boot_x86_magenta(params, cmd_line, kernel, 0, |
| ram_disk, ram_disk_size); |
| } |
| |
| printf("Unsupported OS/format combination.\n"); |
| return 1; |
| } |