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/*
* uImage support for PowerPC
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <sys/types.h>
#include <image.h>
#include <getopt.h>
#include <arch/options.h>
#include "../../kexec.h"
#include "kexec-ppc.h"
#include "fixup_dtb.h"
#include <kexec-uImage.h>
/* See options.h -- add any more there, too. */
static const struct option options[] = {
KEXEC_ARCH_OPTIONS
{"command-line", 1, 0, OPT_APPEND},
{"append", 1, 0, OPT_APPEND},
{"dtb", 1, 0, OPT_DTB},
{"reuse-node", 1, 0, OPT_NODES},
{0, 0, 0, 0},
};
static const char short_options[] = KEXEC_ARCH_OPT_STR;
void uImage_ppc_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=<filename> Specify device tree blob file.\n"
" --reuse-node=node Specify nodes which should be taken from /proc/device-tree.\n"
" Can be set multiple times.\n"
);
}
int uImage_ppc_probe(const char *buf, off_t len)
{
return uImage_probe(buf, len, IH_ARCH_PPC);
}
static int ppc_load_bare_bits(int argc, char **argv, const char *buf,
off_t len, struct kexec_info *info, unsigned int load_addr,
unsigned int ep)
{
char *command_line;
int command_line_len;
char *dtb;
unsigned int addr;
unsigned long dtb_addr;
#define FIXUP_ENTRYS (20)
char *fixup_nodes[FIXUP_ENTRYS + 1];
int cur_fixup = 0;
int opt;
int ret;
command_line = NULL;
dtb = NULL;
while ((opt = getopt_long(argc, argv, short_options, options, 0)) != -1) {
switch (opt) {
default:
/* Ignore core options */
if (opt < OPT_ARCH_MAX) {
break;
}
case '?':
usage();
return -1;
case OPT_APPEND:
command_line = optarg;
break;
case OPT_DTB:
dtb = optarg;
break;
case OPT_NODES:
if (cur_fixup >= FIXUP_ENTRYS) {
fprintf(stderr, "The number of entries for the fixup is too large\n");
exit(1);
}
fixup_nodes[cur_fixup] = optarg;
cur_fixup++;
break;
}
}
command_line_len = 0;
if (command_line)
command_line_len = strlen(command_line) + 1;
fixup_nodes[cur_fixup] = NULL;
/*
* len contains the length of the whole kernel image except the bss
* section. The 3 MiB should cover it. The purgatory and the dtb are
* allocated from memtop down towards zero so we should never get too
* close to the bss :)
*/
ret = valid_memory_range(info, load_addr, len + 3 * 1024 * 1024);
if (!ret) {
printf("Can't add kernel to addr 0x%08x len %ld\n",
load_addr, len + 3 * 1024 * 1024);
return -1;
}
add_segment(info, buf, len, load_addr, len + 3 * 1024 * 1024);
if (dtb) {
char *blob_buf;
off_t blob_size = 0;
/* Grab device tree from buffer */
blob_buf = slurp_file(dtb, &blob_size);
if (!blob_buf || !blob_size)
die("Device tree seems to be an empty file.\n");
blob_buf = fixup_dtb_nodes(blob_buf, &blob_size, fixup_nodes, command_line);
dtb_addr = add_buffer(info, blob_buf, blob_size, blob_size, 0, 0,
KERNEL_ACCESS_TOP, -1);
} else {
dtb_addr = 0;
}
elf_rel_build_load(info, &info->rhdr, (const char *)purgatory,
purgatory_size, 0, -1, -1, 0);
/* set various variables for the purgatory */
addr = ep;
elf_rel_set_symbol(&info->rhdr, "kernel", &addr, sizeof(addr));
addr = dtb_addr;
elf_rel_set_symbol(&info->rhdr, "dt_offset", &addr, sizeof(addr));
addr = rmo_top;
elf_rel_set_symbol(&info->rhdr, "mem_size", &addr, sizeof(addr));
#define PUL_STACK_SIZE (16 * 1024)
addr = locate_hole(info, PUL_STACK_SIZE, 0, 0, -1, 1);
addr += PUL_STACK_SIZE;
elf_rel_set_symbol(&info->rhdr, "pul_stack", &addr, sizeof(addr));
/* No allocation past here in order not to overwrite the stack */
#undef PUL_STACK_SIZE
addr = elf_rel_get_addr(&info->rhdr, "purgatory_start");
info->entry = (void *)addr;
return 0;
}
int uImage_ppc_load(int argc, char **argv, const char *buf, off_t len,
struct kexec_info *info)
{
struct Image_info img;
int ret;
ret = uImage_load(buf, len, &img);
if (ret)
return ret;
return ppc_load_bare_bits(argc, argv, img.buf, img.len, info,
img.base, img.ep);
}
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