diff options
Diffstat (limited to 'arch/sh/kernel/machine_kexec.c')
| -rw-r--r-- | arch/sh/kernel/machine_kexec.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c index 7672141c841b..f0f049caa6e2 100644 --- a/arch/sh/kernel/machine_kexec.c +++ b/arch/sh/kernel/machine_kexec.c @@ -8,7 +8,6 @@ * This source code is licensed under the GNU General Public License, * Version 2. See the file COPYING for more details. */ - #include <linux/mm.h> #include <linux/kexec.h> #include <linux/delay.h> @@ -16,6 +15,7 @@ #include <linux/numa.h> #include <linux/ftrace.h> #include <linux/suspend.h> +#include <linux/lmb.h> #include <asm/pgtable.h> #include <asm/pgalloc.h> #include <asm/mmu_context.h> @@ -148,3 +148,52 @@ void arch_crash_save_vmcoreinfo(void) VMCOREINFO_LENGTH(node_data, MAX_NUMNODES); #endif } + +void __init reserve_crashkernel(void) +{ + unsigned long long crash_size, crash_base; + int ret; + + /* this is necessary because of lmb_phys_mem_size() */ + lmb_analyze(); + + ret = parse_crashkernel(boot_command_line, lmb_phys_mem_size(), + &crash_size, &crash_base); + if (ret == 0 && crash_size > 0) { + crashk_res.start = crash_base; + crashk_res.end = crash_base + crash_size - 1; + } + + if (crashk_res.end == crashk_res.start) + goto disable; + + crash_size = PAGE_ALIGN(crashk_res.end - crashk_res.start + 1); + if (!crashk_res.start) { + crashk_res.start = lmb_alloc(crash_size, PAGE_SIZE); + if (!crashk_res.start) { + pr_err("crashkernel allocation failed\n"); + goto disable; + } + } else { + ret = lmb_reserve(crashk_res.start, crash_size); + if (unlikely(ret < 0)) { + pr_err("crashkernel reservation failed - " + "memory is in use\n"); + goto disable; + } + } + + pr_info("Reserving %ldMB of memory at %ldMB " + "for crashkernel (System RAM: %ldMB)\n", + (unsigned long)(crash_size >> 20), + (unsigned long)(crashk_res.start >> 20), + (unsigned long)(lmb_phys_mem_size() >> 20)); + + crashk_res.end = crashk_res.start + crash_size - 1; + insert_resource(&iomem_resource, &crashk_res); + + return; + +disable: + crashk_res.start = crashk_res.end = 0; +} |