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/* |
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* fis.c - simple redboot partition parser |
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* |
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* copyright 2009 Sebastian Gottschall / NewMedia-NET GmbH / DD-WRT.COM |
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* licensed under GPL conditions |
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*/ |
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|
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struct fis_image_desc { |
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unsigned char name[16]; // Null terminated name |
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unsigned long flash_base; // Address within FLASH of image |
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unsigned long mem_base; // Address in memory where it executes |
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unsigned long size; // Length of image |
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unsigned long entry_point; // Execution entry point |
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unsigned long data_length; // Length of actual data |
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unsigned char _pad[256 - (16 + 7 * sizeof(unsigned long))]; |
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unsigned long desc_cksum; // Checksum over image descriptor |
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unsigned long file_cksum; // Checksum over image data |
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}; |
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|
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static unsigned int getPartition(char *name) |
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{ |
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int count = 0; |
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unsigned char *p = |
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(unsigned char *)(flashbase + flashsize - (sectorsize * 2)); |
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struct fis_image_desc *fis = (struct fis_image_desc *)p; |
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while (fis->name[0] != 0xff && count < 10) { |
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if (!strncmp(fis->name, name, strlen(name))) |
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return fis->flash_base; |
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} |
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return 0; |
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} |
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|
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/* |
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* searches for a directory entry named linux* vmlinux* or kernel and returns its flash address (it also initializes entrypoint and load address) |
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*/ |
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static unsigned int getLinux(void) |
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{ |
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int count = 0; |
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unsigned char *p = |
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(unsigned char *)(flashbase + flashsize - (sectorsize * 2)); |
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struct fis_image_desc *fis = (struct fis_image_desc *)p; |
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/* search for fis partiton linux*,vmlinux* or kernel */ |
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while (fis->name[0] != 0xff && count < 10) { |
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if (!strncmp(fis->name, "linux", 5) |
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|| !strncmp(fis->name, "vmlinux", 7) |
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|| !strcmp(fis->name, "kernel")) { |
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printf |
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("found bootable image: [%s] at [0x%08X] EP [0x%08X]\n", |
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fis->name, fis->flash_base, fis->entry_point); |
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bootoffset = fis->entry_point; |
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output_data = (uch *) fis->mem_base; |
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return fis->flash_base; |
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} |
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p += 256; |
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fis = (struct fis_image_desc *)p; |
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count++; |
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} |
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puts("no bootable image found, try default location 0xbfc10000\n"); |
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bootoffset = 0x80041000; |
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output_data = (uch *) 0x80041000; |
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return 0xbfc10000; //first available address after bootloader |
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} |
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