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/*
* crashdump-sh.c - crashdump for SuperH
* Copyright (C) 2008 Magnus Damm
*
* Based on x86 and ppc64 implementation, written by
* Vivek Goyal (vgoyal@in.ibm.com), R Sharada (sharada@in.ibm.com)
* Copyright (C) IBM Corporation, 2005. All rights reserved
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#define _GNU_SOURCE
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <elf.h>
#include "../../kexec.h"
#include "../../kexec-elf.h"
#include "../../kexec-elf-boot.h"
#include "../../kexec-syscall.h"
#include "../../crashdump.h"
#include "kexec-sh.h"
#include "crashdump-sh.h"
#include <arch/options.h>
#define CRASH_MAX_MEMORY_RANGES 64
static struct memory_range crash_memory_range[CRASH_MAX_MEMORY_RANGES];
static int crash_sh_range_nr;
static int crash_sh_memory_range_callback(void *UNUSED(data), int UNUSED(nr),
char *str,
unsigned long long base,
unsigned long long length)
{
struct memory_range *range = crash_memory_range;
struct memory_range *range2 = crash_memory_range;
range += crash_sh_range_nr;
if (crash_sh_range_nr >= CRASH_MAX_MEMORY_RANGES) {
return 1;
}
if (strncmp(str, "System RAM\n", 11) == 0) {
range->start = base;
range->end = base + length - 1;
range->type = RANGE_RAM;
crash_sh_range_nr++;
}
if (strncmp(str, "Crash kernel\n", 13) == 0) {
if (!crash_sh_range_nr)
die("Unsupported /proc/iomem format\n");
range2 = range - 1;
if ((base + length - 1) < range2->end) {
range->start = base + length;
range->end = range2->end;
range->type = RANGE_RAM;
crash_sh_range_nr++;
}
range2->end = base - 1;
}
return 0;
}
/* Return a sorted list of available memory ranges. */
static int crash_get_memory_ranges(struct memory_range **range, int *ranges)
{
crash_sh_range_nr = 0;
kexec_iomem_for_each_line(NULL, crash_sh_memory_range_callback, NULL);
*range = crash_memory_range;
*ranges = crash_sh_range_nr;
return 0;
}
static struct crash_elf_info elf_info32 =
{
class: ELFCLASS32,
data: ELFDATA2LSB,
machine: EM_SH,
page_offset: PAGE_OFFSET,
};
static int add_cmdline_param(char *cmdline, uint64_t addr, char *cmdstr,
char *byte)
{
int cmdlen, len, align = 1024;
char str[COMMAND_LINE_SIZE], *ptr;
/* Passing in =xxxK / =xxxM format. Saves space required in cmdline.*/
switch (byte[0]) {
case 'K':
if (addr%align)
return -1;
addr = addr/align;
break;
case 'M':
addr = addr/(align *align);
break;
}
ptr = str;
strcpy(str, cmdstr);
ptr += strlen(str);
ultoa(addr, ptr);
strcat(str, byte);
len = strlen(str);
cmdlen = strlen(cmdline) + len;
if (cmdlen > (COMMAND_LINE_SIZE - 1))
die("Command line overflow\n");
strcat(cmdline, str);
dbgprintf("Command line after adding elfcorehdr: %s\n", cmdline);
return 0;
}
/* Loads additional segments in case of a panic kernel is being loaded.
* One segment for storing elf headers for crash memory image.
*/
int load_crashdump_segments(struct kexec_info *info, char* mod_cmdline)
{
void *tmp;
unsigned long sz, elfcorehdr;
int nr_ranges;
struct memory_range *mem_range;
if (crash_get_memory_ranges(&mem_range, &nr_ranges) < 0)
return -1;
if (crash_create_elf32_headers(info, &elf_info32,
mem_range, nr_ranges,
&tmp, &sz,
ELF_CORE_HEADER_ALIGN) < 0)
return -1;
elfcorehdr = add_buffer_phys_virt(info, tmp, sz, sz, 1024,
0, 0xffffffff, -1, 0);
dbgprintf("Created elf header segment at 0x%lx\n", elfcorehdr);
add_cmdline_param(mod_cmdline, elfcorehdr, " elfcorehdr=", "K");
add_cmdline_param(mod_cmdline, elfcorehdr - mem_min, " mem=", "K");
return 0;
}
int is_crashkernel_mem_reserved(void)
{
uint64_t start, end;
return parse_iomem_single("Crash kernel\n", &start, &end) == 0 ?
(start != end) : 0;
}
int get_crash_kernel_load_range(uint64_t *start, uint64_t *end)
{
return parse_iomem_single("Crash kernel\n", start, end);
}
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