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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-syscall.h"
#include "kexec-ppc.h"
#include "fixup_dtb.h"
#include <kexec-uImage.h>
#include "crashdump-powerpc.h"
#include <limits.h>
int create_flatten_tree(struct kexec_info *, unsigned char **, unsigned long *,
char *);
/* 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},
{"ramdisk", 1, 0, OPT_RAMDISK},
{"initrd", 1, 0, OPT_RAMDISK},
{"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"
" --ramdisk=<filename> Initial RAM disk.\n"
" --initrd=<filename> same as --ramdisk\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, *cmdline_buf, *crash_cmdline;
int command_line_len;
char *dtb;
unsigned int addr;
unsigned long dtb_addr;
unsigned long dtb_addr_actual;
#define FIXUP_ENTRYS (20)
char *fixup_nodes[FIXUP_ENTRYS + 1];
int cur_fixup = 0;
int opt;
int ret;
char *seg_buf = NULL;
off_t seg_size = 0;
unsigned long long hole_addr;
unsigned long max_addr;
char *blob_buf = NULL;
off_t blob_size = 0;
cmdline_buf = NULL;
command_line = NULL;
dtb = NULL;
max_addr = LONG_MAX;
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_RAMDISK:
ramdisk = 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;
}
}
if (ramdisk && reuse_initrd)
die("Can't specify --ramdisk or --initrd with --reuseinitrd\n");
command_line_len = 0;
if (command_line) {
command_line_len = strlen(command_line) + 1;
} else {
command_line = get_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 1 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, load_addr + (len + (1 * 1024 * 1024)));
if (!ret) {
printf("Can't add kernel to addr 0x%08x len %ld\n",
load_addr, len + (1 * 1024 * 1024));
return -1;
}
add_segment(info, buf, len, load_addr, len + (1 * 1024 * 1024));
if (info->kexec_flags & KEXEC_ON_CRASH) {
crash_cmdline = xmalloc(COMMAND_LINE_SIZE);
memset((void *)crash_cmdline, 0, COMMAND_LINE_SIZE);
} else
crash_cmdline = NULL;
if (info->kexec_flags & KEXEC_ON_CRASH) {
ret = load_crashdump_segments(info, crash_cmdline,
max_addr, 0);
if (ret < 0) {
return -1;
}
}
cmdline_buf = xmalloc(COMMAND_LINE_SIZE);
memset((void *)cmdline_buf, 0, COMMAND_LINE_SIZE);
if (command_line)
strncat(cmdline_buf, command_line, command_line_len);
if (crash_cmdline)
strncat(cmdline_buf, crash_cmdline,
sizeof(crash_cmdline) -
strlen(crash_cmdline) - 1);
elf_rel_build_load(info, &info->rhdr, (const char *)purgatory,
purgatory_size, 0, -1, -1, 0);
/* Here we need to initialize the device tree, and find out where
* it is going to live so we can place it directly after the
* kernel image */
if (dtb) {
/* Grab device tree from buffer */
blob_buf = slurp_file(dtb, &blob_size);
} else {
create_flatten_tree(info, (unsigned char **)&blob_buf,
(unsigned long *)&blob_size, cmdline_buf);
}
if (!blob_buf || !blob_size)
die("Device tree seems to be an empty file.\n");
/* initial fixup for device tree */
blob_buf = fixup_dtb_init(info, blob_buf, &blob_size, load_addr, &dtb_addr);
if (ramdisk) {
seg_buf = slurp_file(ramdisk, &seg_size);
/* Load ramdisk at top of memory */
hole_addr = add_buffer(info, seg_buf, seg_size, seg_size,
0, dtb_addr + blob_size, max_addr, -1);
ramdisk_base = hole_addr;
ramdisk_size = seg_size;
}
if (reuse_initrd) {
ramdisk_base = initrd_base;
ramdisk_size = initrd_size;
}
if (info->kexec_flags & KEXEC_ON_CRASH && ramdisk_base != 0) {
if ( (ramdisk_base < crash_base) ||
(ramdisk_base > crash_base + crash_size) ) {
printf("WARNING: ramdisk is above crashkernel region!\n");
}
else if (ramdisk_base + ramdisk_size > crash_base + crash_size) {
printf("WARNING: ramdisk overflows crashkernel region!\n");
}
}
/* Perform final fixup on devie tree, i.e. everything beside what
* was done above */
fixup_dtb_finalize(info, blob_buf, &blob_size, fixup_nodes,
cmdline_buf);
dtb_addr_actual = add_buffer(info, blob_buf, blob_size, blob_size, 0, dtb_addr,
load_addr + KERNEL_ACCESS_TOP, 1);
if (dtb_addr_actual != dtb_addr) {
printf("dtb_addr_actual: %lx, dtb_addr: %lx\n", dtb_addr_actual, dtb_addr);
die("Error device tree not loadded to address it was expecting to be loaded too!\n");
}
/* 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));
#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, "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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