diff options
Diffstat (limited to 'lib_i386/zimage.c')
| -rw-r--r-- | lib_i386/zimage.c | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/lib_i386/zimage.c b/lib_i386/zimage.c deleted file mode 100644 index c3b4e597aa..0000000000 --- a/lib_i386/zimage.c +++ /dev/null @@ -1,225 +0,0 @@ -/* - * (C) Copyright 2002 - * Daniel Engström, Omicron Ceti AB, daniel@omicron.se - * - * 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 - */ - -/* - * Linux i386 zImage and bzImage loading - * - * based on the procdure described in - * linux/Documentation/i386/boot.txt - */ - -#include <common.h> -#include <asm/io.h> -#include <asm/ptrace.h> -#include <asm/zimage.h> -#include <asm/realmode.h> -#include <asm/byteorder.h> - -/* - * Memory lay-out: - * - * relative to setup_base (which is 0x90000 currently) - * - * 0x0000-0x7FFF Real mode kernel - * 0x8000-0x8FFF Stack and heap - * 0x9000-0x90FF Kernel command line - */ -#define DEFAULT_SETUP_BASE 0x90000 -#define COMMAND_LINE_OFFSET 0x9000 -#define HEAP_END_OFFSET 0x8e00 - -#define COMMAND_LINE_SIZE 2048 - -static void build_command_line(char *command_line, int auto_boot) -{ - char *env_command_line; - - command_line[0] = '\0'; - - env_command_line = getenv("bootargs"); - - /* set console= argument if we use a serial console */ - if (NULL == strstr(env_command_line, "console=")) { - if (0==strcmp(getenv("stdout"), "serial")) { - - /* We seem to use serial console */ - sprintf(command_line, "console=ttyS0,%s ", - getenv("baudrate")); - } - } - - if (auto_boot) { - strcat(command_line, "auto "); - } - - if (NULL != env_command_line) { - strcat(command_line, env_command_line); - } - - - printf("Kernel command line: \"%s\"\n", command_line); -} - -void *load_zimage(char *image, unsigned long kernel_size, - unsigned long initrd_addr, unsigned long initrd_size, - int auto_boot) -{ - void *setup_base; - int setup_size; - int bootproto; - int big_image; - void *load_address; - - - setup_base = (void*)DEFAULT_SETUP_BASE; /* base address for real-mode segment */ - - if (KERNEL_MAGIC != *(u16*)(image + BOOT_FLAG_OFF)) { - printf("Error: Invalid kernel magic (found 0x%04x, expected 0xaa55)\n", - *(u16*)(image + BOOT_FLAG_OFF)); - return 0; - } - - - /* determine boot protocol version */ - if (KERNEL_V2_MAGIC == *(u32*)(image+HEADER_OFF)) { - bootproto = *(u16*)(image+VERSION_OFF); - } else { - /* Very old kernel */ - bootproto = 0x0100; - } - - /* determine size of setup */ - if (0 == *(u8*)(image + SETUP_SECTS_OFF)) { - setup_size = 5 * 512; - } else { - setup_size = (*(u8*)(image + SETUP_SECTS_OFF) + 1) * 512; - } - - if (setup_size > SETUP_MAX_SIZE) { - printf("Error: Setup is too large (%d bytes)\n", setup_size); - } - - /* Determine image type */ - big_image = (bootproto >= 0x0200) && (*(u8*)(image + LOADFLAGS_OFF) & BIG_KERNEL_FLAG); - - /* Derermine load address */ - load_address = (void*)(big_image ? BZIMAGE_LOAD_ADDR:ZIMAGE_LOAD_ADDR); - - /* load setup */ - memmove(setup_base, image, setup_size); - - printf("Using boot protocol version %x.%02x\n", - (bootproto & 0xff00) >> 8, bootproto & 0xff); - - - if (bootproto == 0x0100) { - - *(u16*)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC; - *(u16*)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET; - - /* A very old kernel MUST have its real-mode code - * loaded at 0x90000 */ - - if ((u32)setup_base != 0x90000) { - /* Copy the real-mode kernel */ - memmove((void*)0x90000, setup_base, setup_size); - /* Copy the command line */ - memmove((void*)0x99000, setup_base+COMMAND_LINE_OFFSET, - COMMAND_LINE_SIZE); - - setup_base = (void*)0x90000; /* Relocated */ - } - - /* It is recommended to clear memory up to the 32K mark */ - memset((void*)0x90000 + setup_size, 0, SETUP_MAX_SIZE-setup_size); - } - - if (bootproto >= 0x0200) { - *(u8*)(setup_base + TYPE_OF_LOADER_OFF) = 0xff; - printf("Linux kernel version %s\n", - (char*)(setup_base + SETUP_START_OFFSET + - *(u16*)(setup_base + START_SYS_OFF + 2))); - - if (initrd_addr) { - printf("Initial RAM disk at linear address 0x%08lx, size %ld bytes\n", - initrd_addr, initrd_size); - - *(u32*)(setup_base + RAMDISK_IMAGE_OFF) = initrd_addr; - *(u32*)(setup_base + RAMDISK_SIZE_OFF)=initrd_size; - } - } - - if (bootproto >= 0x0201) { - *(u16*)(setup_base + HEAP_END_PTR_OFF) = HEAP_END_OFFSET; - - /* CAN_USE_HEAP */ - *(u8*)(setup_base + LOADFLAGS_OFF) = - *(u8*)(setup_base + LOADFLAGS_OFF) | HEAP_FLAG; - } - - if (bootproto >= 0x0202) { - *(u32*)(setup_base + CMD_LINE_PTR_OFF) = (u32)setup_base + COMMAND_LINE_OFFSET; - } else if (bootproto >= 0x0200) { - *(u16*)(setup_base + CMD_LINE_MAGIC_OFF) = COMMAND_LINE_MAGIC; - *(u16*)(setup_base + CMD_LINE_OFFSET_OFF) = COMMAND_LINE_OFFSET; - *(u16*)(setup_base + SETUP_MOVE_SIZE_OFF) = 0x9100; - } - - - if (big_image) { - if ((kernel_size - setup_size) > BZIMAGE_MAX_SIZE) { - printf("Error: bzImage kernel too big! (size: %ld, max: %d)\n", - kernel_size - setup_size, BZIMAGE_MAX_SIZE); - return 0; - } - - } else if ((kernel_size - setup_size) > ZIMAGE_MAX_SIZE) { - printf("Error: zImage kernel too big! (size: %ld, max: %d)\n", - kernel_size - setup_size, ZIMAGE_MAX_SIZE); - return 0; - } - - /* build command line at COMMAND_LINE_OFFSET */ - build_command_line(setup_base + COMMAND_LINE_OFFSET, auto_boot); - - printf("Loading %czImage at address 0x%08x (%ld bytes)\n", big_image ? 'b' : ' ', - (u32)load_address, kernel_size - setup_size); - - - memmove(load_address, image + setup_size, kernel_size - setup_size); - - /* ready for booting */ - return setup_base; -} - -void boot_zimage(void *setup_base) -{ - struct pt_regs regs; - - memset(®s, 0, sizeof(struct pt_regs)); - regs.xds = (u32)setup_base >> 4; - regs.xss = 0x9000; - regs.esp = 0x9000; - regs.eflags = 0; - enter_realmode(((u32)setup_base+SETUP_START_OFFSET)>>4, 0, ®s, ®s); -} |
