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author | Dale Farnsworth <dale@farnsworth.org> | 2008-12-16 06:22:59 +0000 |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2008-12-23 15:13:28 +1100 |
commit | 2e8e4f5b80e101da588af650de0ff6b3c475d6b3 (patch) | |
tree | 5097f654aec290e9835e882e2c2aff1e27d0c980 /arch/powerpc/kernel/machine_kexec.c | |
parent | b906cfa397fdef8decbd36467b1f63c830a0bf2b (diff) | |
download | op-kernel-dev-2e8e4f5b80e101da588af650de0ff6b3c475d6b3.zip op-kernel-dev-2e8e4f5b80e101da588af650de0ff6b3c475d6b3.tar.gz |
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>
Diffstat (limited to 'arch/powerpc/kernel/machine_kexec.c')
-rw-r--r-- | arch/powerpc/kernel/machine_kexec.c | 34 |
1 files changed, 34 insertions, 0 deletions
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 @@ 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); |