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authorEric W. Biederman <ebiederm@xmission.com>2005-06-25 14:57:43 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 16:24:46 -0700
commit719e711050482be667dafd39ec787859d353931c (patch)
tree54580a25fc0a0f6167f7d15be9a7297808b28a04 /arch
parentcee5dab4856f51c5cad3aecc630ad0a4d2217a85 (diff)
downloadop-kernel-dev-719e711050482be667dafd39ec787859d353931c.zip
op-kernel-dev-719e711050482be667dafd39ec787859d353931c.tar.gz
[PATCH] kexec: x86_64: add i8259 shutdown method
From: Eric W. Biederman <ebiederm@xmission.com The following patch simply adds a shutdown method to the x86_64 i8259 code. Signed-off-by: Eric Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86_64/kernel/i8259.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/i8259.c b/arch/x86_64/kernel/i8259.c
index 19eafa0..a891690 100644
--- a/arch/x86_64/kernel/i8259.c
+++ b/arch/x86_64/kernel/i8259.c
@@ -414,10 +414,22 @@ static int i8259A_suspend(struct sys_device *dev, pm_message_t state)
return 0;
}
+static int i8259A_shutdown(struct sys_device *dev)
+{
+ /* Put the i8259A into a quiescent state that
+ * the kernel initialization code can get it
+ * out of.
+ */
+ outb(0xff, 0x21); /* mask all of 8259A-1 */
+ outb(0xff, 0xA1); /* mask all of 8259A-1 */
+ return 0;
+}
+
static struct sysdev_class i8259_sysdev_class = {
set_kset_name("i8259"),
.suspend = i8259A_suspend,
.resume = i8259A_resume,
+ .shutdown = i8259A_shutdown,
};
static struct sys_device device_i8259A = {
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