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/*
* kexec: Linux boots Linux
*
* Copyright (C) 2008 AXIS Communications AB
* Written by Edgar E. Iglesias
*
* Based on x86 implementation,
* Copyright (C) 2003-2005 Eric Biederman (ebiederm@xmission.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation (version 2 of the License).
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <getopt.h>
#include <elf.h>
#include "../../kexec.h"
#include "../../kexec-syscall.h"
#include "../../kexec-elf.h"
#include "../../kexec-elf-boot.h"
#include <arch/options.h>
#include "kexec-cris.h"
int elf_cris_probe(const char *buf, off_t len)
{
struct mem_ehdr ehdr;
int result;
result = build_elf_exec_info(buf, len, &ehdr, 0);
if (result < 0)
goto out;
/* Verify the architecuture specific bits */
if (ehdr.e_machine != EM_CRIS) {
result = -1;
goto out;
}
result = 0;
out:
free_elf_info(&ehdr);
return result;
}
void elf_cris_usage(void)
{
printf(" --append=STRING Set the kernel command line to STRING\n"
);
}
#define CRAMFS_MAGIC 0x28cd3d45
#define JHEAD_MAGIC 0x1FF528A6
#define JHEAD_SIZE 8
#define RAM_INIT_MAGIC 0x56902387
#define COMMAND_LINE_MAGIC 0x87109563
#define NAND_BOOT_MAGIC 0x9a9db001
int elf_cris_load(int argc, char **argv, const char *buf, off_t len,
struct kexec_info *info)
{
struct mem_ehdr ehdr;
char *command_line;
unsigned int *trampoline_buf;
unsigned long trampoline_base;
int opt;
extern void cris_trampoline(void);
extern unsigned long cris_trampoline_size;
extern struct regframe_t {
unsigned int regs[16];
} cris_regframe;
/* See options.h -- add any more there, too. */
static const struct option options[] = {
KEXEC_ARCH_OPTIONS
{"append", 1, 0, OPT_APPEND},
{ 0, 0, 0, 0 },
};
static const char short_options[] = KEXEC_OPT_STR "";
/*
* Parse the command line arguments
*/
command_line = 0;
while((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
switch(opt) {
default:
/* Ignore core options */
if (opt < OPT_ARCH_MAX) {
break;
}
case OPT_APPEND:
command_line = optarg;
break;
}
}
/* Load the ELF executable */
elf_exec_build_load(info, &ehdr, buf, len, 0);
cris_regframe.regs[0] = virt_to_phys(ehdr.e_entry);
cris_regframe.regs[8] = RAM_INIT_MAGIC;
cris_regframe.regs[12] = NAND_BOOT_MAGIC;
trampoline_buf = xmalloc(cris_trampoline_size);
trampoline_base = add_buffer_virt(info,
trampoline_buf,
cris_trampoline_size,
cris_trampoline_size,
4, 0, elf_max_addr(&ehdr), 1);
memcpy(trampoline_buf,
cris_trampoline, cris_trampoline_size);
info->entry = (void *)trampoline_base;
return 0;
}
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