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/*
* kexec-mips.c - kexec for mips
* Copyright (C) 2007 Francesco Chiechi, Alessandro Rubini
* Copyright (C) 2007 Tvblob s.r.l.
*
* derived from ../ppc/kexec-ppc.c
* Copyright (C) 2004, 2005 Albert Herranz
*
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#include <stddef.h>
#include <stdio.h>
#include <errno.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h>
#include "../../kexec.h"
#include "../../kexec-syscall.h"
#include "kexec-mips.h"
#include <arch/options.h>
/* Currently not used but required by top-level fs2dt code */
off_t initrd_base = 0;
off_t initrd_size = 0;
static struct memory_range memory_range[MAX_MEMORY_RANGES];
/* Return a sorted list of memory ranges. */
int get_memory_ranges(struct memory_range **range, int *ranges,
unsigned long UNUSED(kexec_flags))
{
int memory_ranges = 0;
const char iomem[] = "/proc/iomem";
char line[MAX_LINE];
FILE *fp;
unsigned long long start, end;
char *str;
int type, consumed, count;
fp = fopen(iomem, "r");
if (!fp) {
fprintf(stderr, "Cannot open %s: %s\n", iomem, strerror(errno));
return -1;
}
while (fgets(line, sizeof(line), fp) != 0) {
if (memory_ranges >= MAX_MEMORY_RANGES)
break;
count = sscanf(line, "%llx-%llx : %n", &start, &end, &consumed);
if (count != 2)
continue;
str = line + consumed;
end = end + 1;
if (memcmp(str, "System RAM\n", 11) == 0) {
type = RANGE_RAM;
} else if (memcmp(str, "reserved\n", 9) == 0) {
type = RANGE_RESERVED;
} else {
continue;
}
if (memory_ranges > 0 &&
memory_range[memory_ranges - 1].end == start &&
memory_range[memory_ranges - 1].type == type) {
memory_range[memory_ranges - 1].end = end;
} else {
memory_range[memory_ranges].start = start;
memory_range[memory_ranges].end = end;
memory_range[memory_ranges].type = type;
memory_ranges++;
}
}
fclose(fp);
*range = memory_range;
*ranges = memory_ranges;
return 0;
}
struct file_type file_type[] = {
{"elf-mips", elf_mips_probe, elf_mips_load, elf_mips_usage},
};
int file_types = sizeof(file_type) / sizeof(file_type[0]);
void arch_usage(void)
{
printf(
" --command-line=STRING Set the kernel command line to STRING.\n"
" --append=STRING Set the kernel command line to STRING.\n"
" --dtb=FILE Use FILE as the device tree blob.\n"
" --initrd=FILE Use FILE as initial ramdisk.\n"
" --reuse-cmdline Use kernel command line from running system.\n"
);
}
struct arch_options_t arch_options = {
#ifdef __mips64
.core_header_type = CORE_TYPE_ELF64,
#else
.core_header_type = CORE_TYPE_ELF32,
#endif
};
int arch_process_options(int argc, char **argv)
{
static const struct option options[] = {
KEXEC_ARCH_OPTIONS
{ 0 },
};
static const char short_options[] = KEXEC_ARCH_OPT_STR;
int opt;
char *cmdline = NULL;
const char *append = NULL;
while ((opt = getopt_long(argc, argv, short_options,
options, 0)) != -1) {
switch (opt) {
case OPT_APPEND:
append = optarg;
break;
case OPT_REUSE_CMDLINE:
cmdline = get_command_line();
break;
case OPT_DTB:
arch_options.dtb_file = optarg;
break;
case OPT_RAMDISK:
arch_options.initrd_file = optarg;
break;
default:
break;
}
}
arch_options.command_line = concat_cmdline(cmdline, append);
dbgprintf("%s:%d: command_line: %s\n", __func__, __LINE__,
arch_options.command_line);
dbgprintf("%s:%d: initrd: %s\n", __func__, __LINE__,
arch_options.initrd_file);
dbgprintf("%s:%d: dtb: %s\n", __func__, __LINE__,
arch_options.dtb_file);
return 0;
}
const struct arch_map_entry arches[] = {
/* For compatibility with older patches
* use KEXEC_ARCH_DEFAULT instead of KEXEC_ARCH_MIPS here.
*/
{ "mips", KEXEC_ARCH_MIPS },
{ "mips64", KEXEC_ARCH_MIPS },
{ NULL, 0 },
};
int arch_compat_trampoline(struct kexec_info *UNUSED(info))
{
return 0;
}
void arch_update_purgatory(struct kexec_info *UNUSED(info))
{
}
unsigned long virt_to_phys(unsigned long addr)
{
return addr & 0x7fffffff;
}
/*
* add_segment() should convert base to a physical address on mips,
* while the default is just to work with base as is */
void add_segment(struct kexec_info *info, const void *buf, size_t bufsz,
unsigned long base, size_t memsz)
{
add_segment_phys_virt(info, buf, bufsz, virt_to_phys(base), memsz, 1);
}
/*
* add_buffer() should convert base to a physical address on mips,
* while the default is just to work with base as is */
unsigned long add_buffer(struct kexec_info *info, const void *buf,
unsigned long bufsz, unsigned long memsz,
unsigned long buf_align, unsigned long buf_min,
unsigned long buf_max, int buf_end)
{
return add_buffer_phys_virt(info, buf, bufsz, memsz, buf_align,
buf_min, buf_max, buf_end, 1);
}
int arch_do_exclude_segment(struct kexec_info *UNUSED(info), struct kexec_segment *UNUSED(segment))
{
return 0;
}
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