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yaml
---
r: 123138
b: refs/heads/master
c: 2e8e4f5
h: refs/heads/master
v: v3
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Dale Farnsworth authored and Paul Mackerras committed Dec 23, 2008
1 parent 5acb6bb commit 0d03ec2
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Showing 3 changed files with 40 additions and 20 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: b906cfa397fdef8decbd36467b1f63c830a0bf2b
refs/heads/master: 2e8e4f5b80e101da588af650de0ff6b3c475d6b3
34 changes: 34 additions & 0 deletions trunk/arch/powerpc/kernel/machine_kexec.c
Original file line number Diff line number Diff line change
Expand Up @@ -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)
{
Expand Down Expand Up @@ -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);
24 changes: 5 additions & 19 deletions trunk/arch/powerpc/kernel/machine_kexec_64.c
Original file line number Diff line number Diff line change
Expand Up @@ -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",
Expand All @@ -303,45 +303,31 @@ 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);
prop = of_find_property(node, htab_size_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);

/* 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);
}

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