157 lines
3.8 KiB
C
157 lines
3.8 KiB
C
/*
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* mk-s390-cdboot -- creates one big image using a kernel, a ramdisk and
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* a parmfile
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*
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*
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* 2003-07-24 Volker Sameske <sameske@de.ibm.com>
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*
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* compile with:
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* gcc -Wall -o mk-s390-cdboot mk-s390-cdboot.c
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <string.h>
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#include <stdarg.h>
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#define BUFFER_LEN 1024
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#define INITRD_START 0x0000000000800000LL
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#define START_PSW_ADDRESS 0x80010000
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#define PARAMETER_BUFFER_LEN 80
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static struct option getopt_long_options[]=
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{
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{ "image", 1, 0, 'i'},
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{ "ramdisk", 1, 0, 'r'},
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{ "parmfile", 1, 0, 'p'},
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{ "outfile", 1, 0, 'o'},
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{ "help", 0, 0, 'h'},
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{0, 0, 0, 0}
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};
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static void usage(char *cmd)
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{
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printf("%s [-h] [-v] -i <kernel> -r <ramdisk> -p <parmfile> -o <outfile>\n", cmd);
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}
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int main (int argc, char **argv)
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{
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char *cmd = basename(argv[0]);
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FILE *fd1;
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FILE *fd2;
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FILE *fd3;
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FILE *fd4;
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char buffer[BUFFER_LEN];
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int rc, oc, index;
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unsigned long long initrd_start = INITRD_START;
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unsigned long long initrd_size;
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char image[PARAMETER_BUFFER_LEN];
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char ramdisk[PARAMETER_BUFFER_LEN];
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char parmfile[PARAMETER_BUFFER_LEN];
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char outfile[PARAMETER_BUFFER_LEN];
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int image_specified = 0;
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int ramdisk_specified = 0;
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int parmfile_specified = 0;
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int outfile_specified = 0;
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int start_psw_address = START_PSW_ADDRESS;
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opterr=0;
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while (1)
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{
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oc = getopt_long(argc, argv, "i:r:p:o:h?", getopt_long_options, &index);
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if (oc==-1) break;
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switch (oc)
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{
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case '?':
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case 'h':
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usage(cmd);
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exit(0);
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case 'i':
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strcpy(image, optarg);
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image_specified = 1;
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break;
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case 'r':
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strcpy(ramdisk, optarg);
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ramdisk_specified = 1;
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break;
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case 'p':
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strcpy(parmfile, optarg);
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parmfile_specified = 1;
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break;
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case 'o':
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strcpy(outfile, optarg);
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outfile_specified = 1;
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break;
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default:
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usage(cmd);
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exit(0);
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}
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}
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if (!image_specified || !ramdisk_specified ||
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!parmfile_specified || !outfile_specified) {
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usage(cmd);
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exit(0);
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}
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printf("Creating bootable CD-ROM image...\n");
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printf("kernel is : %s\n", image);
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printf("ramdisk is : %s\n", ramdisk);
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printf("parmfile is: %s\n", parmfile);
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printf("outfile is : %s\n", outfile);
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fd1 = fopen(outfile, "w");
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fd2 = fopen(image, "r");
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fd3 = fopen(ramdisk, "r");
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fd4 = fopen(parmfile, "r");
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printf("writing kernel...\n");
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while (1) {
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rc = fread(buffer, BUFFER_LEN, 1, fd2);
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fwrite(buffer, BUFFER_LEN, 1, fd1);
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if (rc == 0) break;
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}
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printf("writing initrd...\n");
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fseek(fd1, initrd_start, SEEK_SET);
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while (1) {
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rc = fread(buffer, BUFFER_LEN, 1, fd3);
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fwrite(buffer, BUFFER_LEN, 1, fd1);
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if (rc == 0) break;
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}
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fseek(fd3, 0 ,SEEK_END);
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initrd_size = ftell(fd3);
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printf("changing start PSW address to 0x%08x...\n", start_psw_address);
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fseek(fd1, 0x4, SEEK_SET);
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fwrite(&start_psw_address, 4, 1, fd1);
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printf("writing initrd address and size...\n");
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printf("INITRD start: 0x%016llx\n", initrd_start);
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printf("INITRD size : 0x%016llx\n", initrd_size);
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fseek(fd1, 0x10408, SEEK_SET);
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fwrite(&initrd_start, 8, 1, fd1);
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fseek(fd1, 0x10410, SEEK_SET);
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fwrite(&initrd_size, 8, 1, fd1);
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printf("writing parmfile...\n");
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fseek(fd1, 0x10480, SEEK_SET);
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while (1) {
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rc = fread(buffer, 1, 1, fd4);
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fwrite(buffer, 1, 1, fd1);
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if (rc == 0) break;
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}
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fclose(fd1);
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fclose(fd2);
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fclose(fd3);
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fclose(fd4);
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return 0;
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}
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