int machine_kexec_prepare(struct kimage *image)
{
struct kexec_segment *current_segment;
__be32 header;
int i, err;
/*
* Validate that if the current HW supports SMP, then the SW supports
* and implements CPU hotplug for the current HW. If not, we won't be
* able to kexec reliably, so fail the prepare operation.
*/
if (num_possible_cpus() > 1 && platform_can_secondary_boot() &&
!platform_can_cpu_hotplug())
return -EINVAL;
/*
* No segment at default ATAGs address. try to locate
* a dtb using magic.
*/
for (i = 0; i < image->nr_segments; i++) {
current_segment = &image->segment[i];
if (!memblock_is_region_memory(current_segment->mem,
current_segment->memsz))
return -EINVAL;
err = get_user(header, (__be32*)current_segment->buf);
if (err)
return err;
if (be32_to_cpu(header) == OF_DT_HEADER)
dt_mem = current_segment->mem;
}
return 0;
}
int machine_kexec_prepare(struct kimage *image)
{
#ifdef CONFIG_KEXEC_HARDBOOT
struct kexec_segment *current_segment;
__be32 header;
int i, err;
/* No segment at default ATAGs address. try to locate
* a dtb using magic */
for (i = 0; i < image->nr_segments; i++) {
current_segment = &image->segment[i];
err = memblock_is_region_memory(current_segment->mem,
current_segment->memsz);
if (!err)
return - EINVAL;
if(current_segment->mem == image->start)
mem_text_write_kernel_word(&kexec_kernel_len, current_segment->memsz);
err = get_user(header, (__be32*)current_segment->buf);
if (err)
return err;
if (be32_to_cpu(header) == OF_DT_HEADER)
{
mem_text_write_kernel_word(&kexec_boot_atags, current_segment->mem);
mem_text_write_kernel_word(&kexec_boot_atags_len, current_segment->memsz);
}
}
#endif
return 0;
}
int machine_kexec_prepare(struct kimage *image)
{
struct kexec_segment *current_segment;
__be32 header;
int i, err;
/*
* No segment at default ATAGs address. try to locate
* a dtb using magic.
*/
for (i = 0; i < image->nr_segments; i++) {
current_segment = &image->segment[i];
if (!memblock_is_region_memory(current_segment->mem,
current_segment->memsz))
return -EINVAL;
err = get_user(header, (__be32*)current_segment->buf);
if (err)
return err;
if (be32_to_cpu(header) == OF_DT_HEADER)
kexec_boot_atags = current_segment->mem;
}
return 0;
}
/*
* reserve_crashkernel() - reserves memory for crash kernel
*
* This function reserves memory area given in "crashkernel=" kernel command
* line parameter. The memory reserved is used by dump capture kernel when
* primary kernel is crashing.
*/
static void __init reserve_crashkernel(void)
{
unsigned long long crash_base, crash_size;
int ret;
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&crash_size, &crash_base);
/* no crashkernel= or invalid value specified */
if (ret || !crash_size)
return;
crash_size = PAGE_ALIGN(crash_size);
if (crash_base == 0) {
/* Current arm64 boot protocol requires 2MB alignment */
crash_base = memblock_find_in_range(0, ARCH_LOW_ADDRESS_LIMIT,
crash_size, SZ_2M);
if (crash_base == 0) {
pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
crash_size);
return;
}
} else {
/* User specifies base address explicitly. */
if (!memblock_is_region_memory(crash_base, crash_size)) {
pr_warn("cannot reserve crashkernel: region is not memory\n");
return;
}
if (memblock_is_region_reserved(crash_base, crash_size)) {
pr_warn("cannot reserve crashkernel: region overlaps reserved memory\n");
return;
}
if (!IS_ALIGNED(crash_base, SZ_2M)) {
pr_warn("cannot reserve crashkernel: base address is not 2MB aligned\n");
return;
}
}
memblock_reserve(crash_base, crash_size);
pr_info("crashkernel reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
crash_base, crash_base + crash_size, crash_size >> 20);
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}
/**
* machine_kexec_prepare - Prepare for a kexec reboot.
*
* Called from the core kexec code when a kernel image is loaded.
*/
int machine_kexec_prepare(struct kimage *image)
{
struct kexec_segment *current_segment;
__be32 header;
int i, err;
/*
* No segment at default ATAGs address. try to locate
* a dtb using magic.
*/
for (i = 0; i < image->nr_segments; i++) {
current_segment = &image->segment[i];
if (!memblock_is_region_memory(current_segment->mem,
current_segment->memsz))
return -EINVAL;
#ifdef CONFIG_KEXEC_HARDBOOT
if(current_segment->mem == image->start)
kexec_kernel_len = current_segment->memsz;
#endif
err = get_user(header, (__be32*)current_segment->buf);
if (err)
return err;
if (be32_to_cpu(header) == OF_DT_HEADER)
{
kexec_boot_atags = current_segment->mem;
#ifdef CONFIG_KEXEC_HARDBOOT
kexec_boot_atags_len = current_segment->memsz;
#endif
}
}
arm64_kexec_kimage_start = image->start;
kexec_image_info(image);
return 0;
}
/*
* reserve_crashkernel() - reserves memory for crash kernel
*
* This function reserves memory area given in "crashkernel=" kernel command
* line parameter. The memory reserved is used by a dump capture kernel when
* primary kernel is crashing.
*/
static void __init reserve_crashkernel(phys_addr_t limit)
{
unsigned long long crash_size = 0, crash_base = 0;
int ret;
ret = parse_crashkernel(boot_command_line, limit,
&crash_size, &crash_base);
if (ret)
return;
if (crash_base == 0) {
crash_base = memblock_alloc(crash_size, 1 << 20);
if (crash_base == 0) {
pr_warn("crashkernel allocation failed (size:%llx)\n",
crash_size);
return;
}
} else {
/* User specifies base address explicitly. Sanity check */
if (!memblock_is_region_memory(crash_base, crash_size) ||
memblock_is_region_reserved(crash_base, crash_size)) {
pr_warn("crashkernel= has wrong address or size\n");
return;
}
if (memblock_reserve(crash_base, crash_size)) {
pr_warn("crashkernel reservation failed - out of memory\n");
return;
}
}
pr_info("Reserving %lldMB of memory at %lldMB for crashkernel\n",
crash_size >> 20, crash_base >> 20);
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}
static int valid_sdram(unsigned long addr, unsigned long size)
{
return memblock_is_region_memory(addr, size);
}
