powerpc: Setup OF properties for ppc32 kexec
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>
diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
index ac2a21f..037ade7 100644
--- a/arch/powerpc/kernel/machine_kexec.c
+++ b/arch/powerpc/kernel/machine_kexec.c
@@ -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 @@
{
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);