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-rw-r--r--arch/sh/kernel/machine_kexec.c62
1 files changed, 61 insertions, 1 deletions
diff --git a/arch/sh/kernel/machine_kexec.c b/arch/sh/kernel/machine_kexec.c
index 7672141c841b..5a559e666eb3 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>
@@ -147,4 +147,64 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_SYMBOL(node_data);
VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
#endif
+#ifdef CONFIG_X2TLB
+ VMCOREINFO_CONFIG(X2TLB);
+#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) {
+ unsigned long max = lmb_end_of_DRAM() - memory_limit;
+ crashk_res.start = __lmb_alloc_base(crash_size, PAGE_SIZE, max);
+ 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;
+ }
+ }
+
+ crashk_res.end = crashk_res.start + crash_size - 1;
+
+ /*
+ * Crash kernel trumps memory limit
+ */
+ if ((lmb_end_of_DRAM() - memory_limit) <= crashk_res.end) {
+ memory_limit = 0;
+ pr_info("Disabled memory limit for crashkernel\n");
+ }
+
+ pr_info("Reserving %ldMB of memory at 0x%08lx "
+ "for crashkernel (System RAM: %ldMB)\n",
+ (unsigned long)(crash_size >> 20),
+ (unsigned long)(crashk_res.start),
+ (unsigned long)(lmb_phys_mem_size() >> 20));
+
+ return;
+
+disable:
+ crashk_res.start = crashk_res.end = 0;
}
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