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Subject[PATCH 2/14] kexec: i8259-sysfs.x86_64
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Date

The i8259 does not yet have sysfs support on x86_64 so
here is the port from i386, including the shutdown code
to disable it on reboot that kexec appreciates.

diff -uNr linux-2.6.8.1-mm2-i8259-shutdown.i386/arch/x86_64/kernel/i8259.c linux-2.6.8.1-mm2-i8259-sysfs.x86_64/arch/x86_64/kernel/i8259.c
--- linux-2.6.8.1-mm2-i8259-shutdown.i386/arch/x86_64/kernel/i8259.c Fri Aug 20 09:56:29 2004
+++ linux-2.6.8.1-mm2-i8259-sysfs.x86_64/arch/x86_64/kernel/i8259.c Fri Aug 20 10:38:36 2004
@@ -343,6 +343,44 @@
}
}

+static int i8259A_resume(struct sys_device *dev)
+{
+ init_8259A(0);
+ 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"),
+ .resume = i8259A_resume,
+ .shutdown = i8259A_shutdown,
+};
+
+static struct sys_device device_i8259A = {
+ .id = 0,
+ .cls = &i8259_sysdev_class,
+};
+
+static int __init i8259A_init_sysfs(void)
+{
+ int error = sysdev_class_register(&i8259_sysdev_class);
+ if (!error)
+ error = sysdev_register(&device_i8259A);
+ return error;
+}
+
+device_initcall(i8259A_init_sysfs);
+
void init_8259A(int auto_eoi)
{
unsigned long flags;
-
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