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141 lines
3.4 KiB
C
141 lines
3.4 KiB
C
/* CiscoLoad - Bootloader for Cisco Routers
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* (c) 2008 Philippe Vachon <philippe@cowpig.ca>
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* Licensed under the GNU General Public License v2
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*/
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#include <printf.h>
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#include <addr.h>
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#include <elf.h>
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#include <elf_loader.h>
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#include <lzma_loader.h>
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#include <ciloio.h>
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#include <promlib.h>
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/* platform-specific defines */
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#include <platform.h>
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#include <string.h>
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/**
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* Dump 0x10 bytes of memory in canonical hexadecimal form
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* @param addr Starting address to dump from
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*/
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void hex_dump(uint32_t addr)
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{
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uint8_t *rgn = (uint8_t *)addr;
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int i;
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/* print out the address of the 16 bytes of interest */
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printf("%8x " , addr);
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/* print out hex value for individual bytes */
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for (i = 0; i < 16; i++) {
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printf("%02x ", rgn[i]);
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}
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/* print out as chars */
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for (i = 0; i < 16; i++) {
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printf("%c", rgn[i] >= 32 && rgn[i] <= 126 ? rgn[i] : '.');
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}
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printf("\n");
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}
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/**
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* Entry Point for CiscoLoad
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*/
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void start_bootloader()
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{
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int r = 0;
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int f;
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char buf[129];
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char *cmd_line = (char *)MEMORY_BASE;
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char kernel[49];
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const char *cmd_line_append;
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buf[128] = '\0';
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kernel[48] = '\0';
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/* determine amount of RAM present */
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c_putc('I');
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r = c_memsz();
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/* check flash filesystem sanity */
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c_putc('L');
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f = check_flash();
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if (!f) {
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printf("\nError: Unable to find any valid flash! Aborting load.\n");
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return;
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}
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c_putc('O');
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platform_init();
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printf("\nCiscoLoader (CILO) - Linux bootloader for Cisco Routers\n");
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printf("Available RAM: %d kB\n", r/1024);
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printf("Available files:\n");
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flash_directory();
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enter_filename:
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printf("\nEnter filename to boot:\n> ");
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c_gets(buf, 128);
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int baud = c_baud(); /* get console baud rate */
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printf("Boot console baud rate: %d\n", baud);
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/* determine if a command line string has been appended to kernel name */
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if ((cmd_line_append = strchr(buf, ' ')) != NULL) {
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strcpy(cmd_line, (char *)(cmd_line_append + 1));
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/* extract the kernel file name now */
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uint32_t kernel_name_len = cmd_line_append - buf;
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strncpy(kernel, buf, kernel_name_len);
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kernel[kernel_name_len + 1] = '\0';
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/* determine if console is set in the command line; if not,
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* append it.
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*/
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if (!strstr(cmd_line,"console")) {
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sprintf(cmd_line, "%s console=ttyS0,%d", cmd_line, baud);
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}
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} else {
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strncpy(kernel, buf, 48);
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sprintf(cmd_line, "console=ttyS0,%d", baud);
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}
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printf("\n\nAttempting to load file %s\n", kernel);
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struct file kernel_file = cilo_open(kernel);
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if (kernel_file.code == 0) {
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printf("Unable to find \"%s\" on the specified filesystem.\n",
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kernel);
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goto enter_filename;
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}
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/* check if this is an LZMA-compressed kernel image. */
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if (strstr(kernel, "lzma")) {
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printf("Loading LZMA-compressed kernel image.\n");
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load_lzma(&kernel_file, LOADADDR, cmd_line);
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} else {
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struct elf32_header hdr;
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cilo_read(&hdr, sizeof(struct elf32_header), 1, &kernel_file);
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cilo_seek(&kernel_file, 0, SEEK_SET);
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/* check if this is a 32-bit or 64-bit kernel image. */
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printf("Booting %s.\n", kernel);
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if (load_elf32_file(&kernel_file, cmd_line)
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< 0)
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{
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printf("Fatal error while loading kernel. Aborting.\n");
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}
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}
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goto enter_filename;
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}
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