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Use extended crashkernel command line on sh

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This patch removes the crashkernel parsing from arch/sh/kernel/machine_kexec.c
and calls the generic function, introduced in the generic patch, in
setup_bootmem_allocator().

This is necessary because the amount of System RAM must be known in this
function now because of the new syntax.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bernhard Walle 2007-10-18 23:41:02 -07:00 committed by Linus Torvalds
parent edd8ce6743
commit 7d7712a385
2 changed files with 33 additions and 26 deletions
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21
arch/sh/kernel/machine_kexec.c
View file

@ -104,24 +104,3 @@ NORET_TYPE void machine_kexec(struct kimage *image)
(*rnk)(page_list, reboot_code_buffer, image->start, vbr_reg);
}
/* crashkernel=size@addr specifies the location to reserve for
* a crash kernel. By reserving this memory we guarantee
* that linux never sets it up as a DMA target.
* Useful for holding code to do something appropriate
* after a kernel panic.
*/
static int __init parse_crashkernel(char *arg)
{
unsigned long size, base;
size = memparse(arg, &arg);
if (*arg == '@') {
base = memparse(arg+1, &arg);
/* FIXME: Do I want a sanity check
* to validate the memory range?
*/
crashk_res.start = base;
crashk_res.end = base + size - 1;
}
return 0;
}
early_param("crashkernel", parse_crashkernel);

38
arch/sh/kernel/setup.c
View file

@ -128,6 +128,37 @@ static void __init register_bootmem_low_pages(void)
free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
}
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
unsigned long long free_mem;
unsigned long long crash_size, crash_base;
int ret;
free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
ret = parse_crashkernel(boot_command_line, free_mem,
&crash_size, &crash_base);
if (ret == 0 && crash_size) {
if (crash_base > 0) {
printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
"for crashkernel (System RAM: %ldMB)\n",
(unsigned long)(crash_size >> 20),
(unsigned long)(crash_base >> 20),
(unsigned long)(free_mem >> 20));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
reserve_bootmem(crash_base, crash_size);
} else
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
}
}
#else
static inline void __init reserve_crashkernel(void)
{}
#endif
void __init setup_bootmem_allocator(unsigned long free_pfn)
{
unsigned long bootmap_size;
@ -189,11 +220,8 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
}
}
#endif
#ifdef CONFIG_KEXEC
if (crashk_res.start != crashk_res.end)
reserve_bootmem(crashk_res.start,
crashk_res.end - crashk_res.start + 1);
#endif
reserve_crashkernel();
}
#ifndef CONFIG_NEED_MULTIPLE_NODES