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sh: kdump support.

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This adds support for kexec based crash dumps.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2007-04-27 11:25:57 +09:00
committed by Paul Mundt
parent db62e5bd29
commit 4d5ade5b29
6 changed files with 129 additions and 9 deletions
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29
arch/sh/kernel/machine_kexec.c
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@@ -59,13 +59,13 @@ static void kexec_info(struct kimage *image)
printk(" segment[%d]: 0x%08x - 0x%08x (0x%08x)\n",
i,
(unsigned int)image->segment[i].mem,
(unsigned int)image->segment[i].mem + image->segment[i].memsz,
(unsigned int)image->segment[i].mem +
image->segment[i].memsz,
(unsigned int)image->segment[i].memsz);
}
}
printk(" start : 0x%08x\n\n", (unsigned int)image->start);
}
/*
* Do not allocate memory (or fail in any way) in machine_kexec().
* We are past the point of no return, committed to rebooting now.
@@ -101,6 +101,27 @@ NORET_TYPE void machine_kexec(struct kimage *image)
/* now call it */
rnk = (relocate_new_kernel_t) reboot_code_buffer;
(*rnk)(page_list, reboot_code_buffer, image->start, vbr_reg);
(*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);