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sh: convert kexec crash kernel management to LMB.

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This migrates the crash kernel handling off of bootmem and over to LMB.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2010-05-07 14:54:55 +09:00
parent 9b7a37853a
commit a5ec395071
3 changed files with 58 additions and 44 deletions
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51
arch/sh/kernel/machine_kexec.c
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@@ -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;
}