From 2e8e4f5b80e101da588af650de0ff6b3c475d6b3 Mon Sep 17 00:00:00 2001 From: Dale Farnsworth Date: Tue, 16 Dec 2008 06:22:59 +0000 Subject: 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 Signed-off-by: Anton Vorontsov Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/machine_kexec.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'arch/powerpc/kernel/machine_kexec.c') diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c index ac2a21f45c7..037ade74a99 100644 --- a/arch/powerpc/kernel/machine_kexec.c +++ b/arch/powerpc/kernel/machine_kexec.c @@ -13,8 +13,10 @@ #include #include #include +#include #include #include +#include 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); -- cgit v1.2.3