/* Return a sorted list of available memory ranges. */
int get_memory_ranges(struct memory_range **range, int *ranges,
unsigned long kexec_flags)
{
int nr, ret;
nr = kexec_iomem_for_each_line("System RAM\n",
kexec_sh_memory_range_callback, NULL);
*range = memory_range;
*ranges = nr;
/*
* Redefine the memory region boundaries if kernel
* exports the limits and if it is panic kernel.
* Override user values only if kernel exported values are
* subset of user defined values.
*/
if (kexec_flags & KEXEC_ON_CRASH) {
unsigned long long start, end;
ret = parse_iomem_single("Crash kernel\n", &start, &end);
if (ret != 0) {
fprintf(stderr, "parse_iomem_single failed.\n");
return -1;
}
if (start > mem_min)
mem_min = start;
if (end < mem_max)
mem_max = end;
}
return 0;
}
/**
* crash_get_memory_ranges() - read system physical memory
*
* Function reads through system physical memory and stores found memory regions
* in @crash_memory_ranges. Number of memory regions found is placed in
* @crash_memory_nr_ranges. Regions are sorted in ascending order.
*
* Returns %0 in case of success and %-1 otherwise (errno is set).
*/
static int crash_get_memory_ranges(void)
{
/*
* First read all memory regions that can be considered as
* system memory including the crash area.
*/
kexec_iomem_for_each_line(NULL, crash_range_callback, NULL);
if (crash_memory_nr_ranges < 1) {
errno = EINVAL;
return -1;
}
/*
* Exclude memory reserved for crashkernel (this may result a split memory
* region).
*/
crash_exclude_range();
/*
* Make sure that the memory regions are sorted.
*/
qsort(crash_memory_ranges, crash_memory_nr_ranges,
sizeof(crash_memory_ranges[0]), range_cmp);
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;
}
int parse_iomem_single(char *str, uint64_t *start, uint64_t *end)
{
struct memory_range range;
int ret;
memset(&range, 0, sizeof(range));
ret = kexec_iomem_for_each_line(str,
kexec_iomem_single_callback, &range);
if (ret == 1) {
if (start)
*start = range.start;
if (end)
*end = range.end;
ret = 0;
}
else
ret = -1;
return ret;
}
