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