diff options
author | Dale Farnsworth <dale@farnsworth.org> | 2008-12-16 06:22:59 (GMT) |
---|---|---|
committer | Paul Mackerras <paulus@samba.org> | 2008-12-23 04:13:28 (GMT) |
commit | 2e8e4f5b80e101da588af650de0ff6b3c475d6b3 (patch) | |
tree | 5097f654aec290e9835e882e2c2aff1e27d0c980 /arch | |
parent | b906cfa397fdef8decbd36467b1f63c830a0bf2b (diff) | |
download | linux-fsl-qoriq-2e8e4f5b80e101da588af650de0ff6b3c475d6b3.tar.xz |
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')
-rw-r--r-- | arch/powerpc/kernel/machine_kexec.c | 34 | ||||
-rw-r--r-- | arch/powerpc/kernel/machine_kexec_64.c | 24 |
2 files changed, 39 insertions, 19 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); diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c index 3c4ca04..a89bce8 100644 --- a/arch/powerpc/kernel/machine_kexec_64.c +++ b/arch/powerpc/kernel/machine_kexec_64.c @@ -289,7 +289,7 @@ void default_machine_kexec(struct kimage *image) } /* Values we need to export to the second kernel via the device tree. */ -static unsigned long htab_base, kernel_end; +static unsigned long htab_base; static struct property htab_base_prop = { .name = "linux,htab-base", @@ -303,25 +303,20 @@ static struct property htab_size_prop = { .value = &htab_size_bytes, }; -static struct property kernel_end_prop = { - .name = "linux,kernel-end", - .length = sizeof(unsigned long), - .value = &kernel_end, -}; - static void __init export_htab_values(void) { struct device_node *node; struct property *prop; + /* On machines with no htab htab_address is NULL */ + if (!htab_address) + return; + node = of_find_node_by_path("/chosen"); if (!node) return; /* remove any stale propertys so ours can be found */ - prop = of_find_property(node, kernel_end_prop.name, NULL); - if (prop) - prom_remove_property(node, prop); prop = of_find_property(node, htab_base_prop.name, NULL); if (prop) prom_remove_property(node, prop); @@ -329,19 +324,10 @@ static void __init export_htab_values(void) 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); - - /* On machines with no htab htab_address is NULL */ - if (NULL == htab_address) - goto out; - htab_base = __pa(htab_address); prom_add_property(node, &htab_base_prop); prom_add_property(node, &htab_size_prop); - out: of_node_put(node); } |