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powerpc: Setup OF properties for ppc32 kexec

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Refactor the setting of kexec OF properties, moving the common code
from machine_kexec_64.c to machine_kexec.c where it can be used on
both ppc64 and ppc32.  This is needed for kexec to work on ppc32
platforms.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Dale Farnsworth
2008-12-16 06:22:59 +00:00
committed by Paul Mackerras
parent b906cfa397
commit 2e8e4f5b80
2 changed files with 39 additions and 19 deletions
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34
arch/powerpc/kernel/machine_kexec.c
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@@ -13,8 +13,10 @@
#include <linux/reboot.h>
#include <linux/threads.h>
#include <linux/lmb.h>
#include <linux/of.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/sections.h>
void machine_crash_shutdown(struct pt_regs *regs)
{
@@ -118,3 +120,35 @@ int overlaps_crashkernel(unsigned long start, unsigned long size)
{
return (start + size) > crashk_res.start && start <= crashk_res.end;
}
/* Values we need to export to the second kernel via the device tree. */
static unsigned long kernel_end;
static struct property kernel_end_prop = {
.name = "linux,kernel-end",
.length = sizeof(unsigned long),
.value = &kernel_end,
};
static int __init kexec_setup(void)
{
struct device_node *node;
struct property *prop;
node = of_find_node_by_path("/chosen");
if (!node)
return -ENOENT;
/* remove any stale properties so ours can be found */
prop = of_find_property(node, kernel_end_prop.name, NULL);
if (prop)
prom_remove_property(node, prop);
/* information needed by userspace when using default_machine_kexec */
kernel_end = __pa(_end);
prom_add_property(node, &kernel_end_prop);
of_node_put(node);
return 0;
}
late_initcall(kexec_setup);