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/*
* kexec/arch/s390/kexec-image.c
*
* (C) Copyright IBM Corp. 2005
*
* Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
*
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <getopt.h>
#include "../../kexec.h"
#include "kexec-s390.h"
#define OPT_APPEND OPT_MAX+0
#define OPT_RAMDISK OPT_MAX+1
int
image_s390_load(int argc, char **argv, const char *kernel_buf,
off_t kernel_size, struct kexec_info *info)
{
void *krnl_buffer;
char *rd_buffer;
const char *command_line;
const char *ramdisk;
int command_line_len;
off_t ramdisk_len;
unsigned int ramdisk_origin;
int opt;
static const struct option options[] =
{
KEXEC_OPTIONS
{"command-line", 1, 0, OPT_APPEND},
{"initrd", 1, 0, OPT_RAMDISK},
{0, 0, 0, 0},
};
static const char short_options[] = KEXEC_OPT_STR "";
ramdisk = NULL;
command_line = NULL;
ramdisk_len = 0;
ramdisk_origin = 0;
while ((opt = getopt_long(argc,argv,short_options,options,0)) != -1) {
switch(opt) {
case '?':
usage();
return -1;
break;
case OPT_APPEND:
command_line = optarg;
break;
case OPT_RAMDISK:
ramdisk = optarg;
break;
}
}
/* Process a given command_line: */
if (command_line) {
command_line_len = strlen(command_line) + 1; /* Remember the '\0' */
if (command_line_len > COMMAND_LINESIZE) {
fprintf(stderr, "Command line too long.\n");
return -1;
}
}
/* Add kernel segment */
add_segment(info, kernel_buf + IMAGE_READ_OFFSET,
kernel_size - IMAGE_READ_OFFSET, IMAGE_READ_OFFSET,
kernel_size - IMAGE_READ_OFFSET);
/* We do want to change the kernel image */
krnl_buffer = (void *) kernel_buf + IMAGE_READ_OFFSET;
/* Load ramdisk if present */
if (ramdisk) {
rd_buffer = slurp_file(ramdisk, &ramdisk_len);
if (rd_buffer == NULL) {
fprintf(stderr, "Could not read ramdisk.\n");
return -1;
}
ramdisk_origin = RAMDISK_ORIGIN_ADDR;
add_segment(info, rd_buffer, ramdisk_len, RAMDISK_ORIGIN_ADDR, ramdisk_len);
}
/* Register the ramdisk in the kernel. */
{
unsigned long long *tmp;
tmp = krnl_buffer + INITRD_START_OFFS;
*tmp = (unsigned long long) ramdisk_origin;
tmp = krnl_buffer + INITRD_SIZE_OFFS;
*tmp = (unsigned long long) ramdisk_len;
}
/*
* We will write a probably given command line.
* First, erase the old area, then setup the new parameters:
*/
if (command_line) {
memset(krnl_buffer + COMMAND_LINE_OFFS, 0, COMMAND_LINESIZE);
memcpy(krnl_buffer + COMMAND_LINE_OFFS, command_line, strlen(command_line));
}
info->entry = (void *) IMAGE_READ_OFFSET;
return 0;
}
int
image_s390_probe(const char *kernel_buf, off_t kernel_size)
{
/*
* Can't reliably tell if an image is valid,
* therefore everything is valid.
*/
return 0;
}
void
image_s390_usage(void)
{
printf("--command-line=STRING Pass a custom command line STRING to the kernel.\n"
"--initrd=FILENAME Use the file FILENAME as a ramdisk.\n"
);
}
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