diff options
Diffstat (limited to 'arch/ppc/boot/utils/mkprep.c')
| -rw-r--r-- | arch/ppc/boot/utils/mkprep.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/arch/ppc/boot/utils/mkprep.c b/arch/ppc/boot/utils/mkprep.c deleted file mode 100644 index 192bb397126f..000000000000 --- a/arch/ppc/boot/utils/mkprep.c +++ /dev/null @@ -1,241 +0,0 @@ -/* - * Makes a prep bootable image which can be dd'd onto - * a disk device to make a bootdisk. Will take - * as input a elf executable, strip off the header - * and write out a boot image as: - * 1) default - strips elf header - * suitable as a network boot image - * 2) -pbp - strips elf header and writes out prep boot partition image - * cat or dd onto disk for booting - * 3) -asm - strips elf header and writes out as asm data - * useful for generating data for a compressed image - * -- Cort - * - * Modified for x86 hosted builds by Matt Porter <porter@neta.com> - * Modified for Sparc hosted builds by Peter Wahl <PeterWahl@web.de> - */ - -#include <stdio.h> -#include <string.h> -#include <stdlib.h> - -/* size of read buffer */ -#define SIZE 0x1000 - -/* - * Partition table entry - * - from the PReP spec - */ -typedef struct partition_entry { - unsigned char boot_indicator; - unsigned char starting_head; - unsigned char starting_sector; - unsigned char starting_cylinder; - - unsigned char system_indicator; - unsigned char ending_head; - unsigned char ending_sector; - unsigned char ending_cylinder; - - unsigned char beginning_sector[4]; - unsigned char number_of_sectors[4]; -} partition_entry_t; - -#define BootActive 0x80 -#define SystemPrep 0x41 - -void copy_image(FILE *, FILE *); -void write_prep_partition(FILE *, FILE *); -void write_asm_data(FILE *, FILE *); - -unsigned int elfhdr_size = 65536; - -int main(int argc, char *argv[]) -{ - FILE *in, *out; - int argptr = 1; - int prep = 0; - int asmoutput = 0; - - if (argc < 3 || argc > 4) { - fprintf(stderr, "usage: %s [-pbp] [-asm] <boot-file> <image>\n", - argv[0]); - exit(-1); - } - -/* needs to handle args more elegantly -- but this is a small/simple program */ - - /* check for -pbp */ - if (!strcmp(argv[argptr], "-pbp")) { - prep = 1; - argptr++; - } - - /* check for -asm */ - if (!strcmp(argv[argptr], "-asm")) { - asmoutput = 1; - argptr++; - } - - /* input file */ - if (!strcmp(argv[argptr], "-")) - in = stdin; - else if (!(in = fopen(argv[argptr], "r"))) - exit(-1); - argptr++; - - /* output file */ - if (!strcmp(argv[argptr], "-")) - out = stdout; - else if (!(out = fopen(argv[argptr], "w"))) - exit(-1); - argptr++; - - /* skip elf header in input file */ - /*if ( !prep )*/ - fseek(in, elfhdr_size, SEEK_SET); - - /* write prep partition if necessary */ - if (prep) - write_prep_partition(in, out); - - /* write input image to bootimage */ - if (asmoutput) - write_asm_data(in, out); - else - copy_image(in, out); - - return 0; -} - -void store_le32(unsigned int v, unsigned char *p) -{ - p[0] = v; - p[1] = v >>= 8; - p[2] = v >>= 8; - p[3] = v >> 8; -} - -void write_prep_partition(FILE *in, FILE *out) -{ - unsigned char block[512]; - partition_entry_t pe; - unsigned char *entry = block; - unsigned char *length = block + 4; - long pos = ftell(in), size; - - if (fseek(in, 0, SEEK_END) < 0) { - fprintf(stderr,"info failed\n"); - exit(-1); - } - size = ftell(in); - if (fseek(in, pos, SEEK_SET) < 0) { - fprintf(stderr,"info failed\n"); - exit(-1); - } - - memset(block, '\0', sizeof(block)); - - /* set entry point and boot image size skipping over elf header */ - store_le32(0x400/*+65536*/, entry); - store_le32(size-elfhdr_size+0x400, length); - - /* sets magic number for msdos partition (used by linux) */ - block[510] = 0x55; - block[511] = 0xAA; - - /* - * Build a "PReP" partition table entry in the boot record - * - "PReP" may only look at the system_indicator - */ - pe.boot_indicator = BootActive; - pe.system_indicator = SystemPrep; - /* - * The first block of the diskette is used by this "boot record" which - * actually contains the partition table. (The first block of the - * partition contains the boot image, but I digress...) We'll set up - * one partition on the diskette and it shall contain the rest of the - * diskette. - */ - pe.starting_head = 0; /* zero-based */ - pe.starting_sector = 2; /* one-based */ - pe.starting_cylinder = 0; /* zero-based */ - pe.ending_head = 1; /* assumes two heads */ - pe.ending_sector = 18; /* assumes 18 sectors/track */ - pe.ending_cylinder = 79; /* assumes 80 cylinders/diskette */ - - /* - * The "PReP" software ignores the above fields and just looks at - * the next two. - * - size of the diskette is (assumed to be) - * (2 tracks/cylinder)(18 sectors/tracks)(80 cylinders/diskette) - * - unlike the above sector numbers, the beginning sector is zero-based! - */ -#if 0 - store_le32(1, pe.beginning_sector); -#else - /* This has to be 0 on the PowerStack? */ - store_le32(0, pe.beginning_sector); -#endif - - store_le32(2*18*80-1, pe.number_of_sectors); - - memcpy(&block[0x1BE], &pe, sizeof(pe)); - - fwrite(block, sizeof(block), 1, out); - fwrite(entry, 4, 1, out); - fwrite(length, 4, 1, out); - /* set file position to 2nd sector where image will be written */ - fseek( out, 0x400, SEEK_SET ); -} - - - -void copy_image(FILE *in, FILE *out) -{ - char buf[SIZE]; - int n; - - while ( (n = fread(buf, 1, SIZE, in)) > 0 ) - fwrite(buf, 1, n, out); -} - - -void -write_asm_data(FILE *in, FILE *out) -{ - int i, cnt, pos = 0; - unsigned int cksum = 0, val; - unsigned char *lp; - unsigned char buf[SIZE]; - size_t len; - - fputs("\t.data\n\t.globl input_data\ninput_data:\n", out); - while ((len = fread(buf, 1, sizeof(buf), in)) > 0) { - cnt = 0; - lp = buf; - /* Round up to longwords */ - while (len & 3) - buf[len++] = '\0'; - for (i = 0; i < len; i += 4) { - if (cnt == 0) - fputs("\t.long\t", out); - fprintf(out, "0x%02X%02X%02X%02X", - lp[0], lp[1], lp[2], lp[3]); - val = *(unsigned long *)lp; - cksum ^= val; - lp += 4; - if (++cnt == 4) { - cnt = 0; - fprintf(out, " # %x \n", pos+i-12); - } else { - fputs(",", out); - } - } - if (cnt) - fputs("0\n", out); - pos += len; - } - fprintf(out, "\t.globl input_len\ninput_len:\t.long\t0x%x\n", pos); - fprintf(stderr, "cksum = %x\n", cksum); -} |