1 files changed, 61 insertions, 0 deletions

diff --git a/include/asm-x86/mach-default/mach_reboot.h b/include/asm-x86/mach-default/mach_reboot.h
new file mode 100644
index 000000000000..e23fd9fbebb3
--- /dev/null
+++ b/include/asm-x86/mach-default/mach_reboot.h
@@ -0,0 +1,61 @@
+/*
+ *  arch/i386/mach-generic/mach_reboot.h
+ *
+ *  Machine specific reboot functions for generic.
+ *  Split out from reboot.c by Osamu Tomita <tomita@cinet.co.jp>
+ */
+#ifndef _MACH_REBOOT_H
+#define _MACH_REBOOT_H
+
+static inline void kb_wait(void)
+{
+        int i;
+
+        for (i = 0; i < 0x10000; i++)
+                if ((inb_p(0x64) & 0x02) == 0)
+                        break;
+}
+
+static inline void mach_reboot(void)
+{
+        int i;
+
+        /* old method, works on most machines */
+        for (i = 0; i < 10; i++) {
+                kb_wait();
+                udelay(50);
+                outb(0xfe, 0x64);       /* pulse reset low */
+                udelay(50);
+        }
+
+        /* New method: sets the "System flag" which, when set, indicates
+         * successful completion of the keyboard controller self-test (Basic
+         * Assurance Test, BAT).  This is needed for some machines with no
+         * keyboard plugged in.  This read-modify-write sequence sets only the
+         * system flag
+         */
+        for (i = 0; i < 10; i++) {
+                int cmd;
+
+                outb(0x20, 0x64);       /* read Controller Command Byte */
+                udelay(50);
+                kb_wait();
+                udelay(50);
+                cmd = inb(0x60);
+                udelay(50);
+                kb_wait();
+                udelay(50);
+                outb(0x60, 0x64);       /* write Controller Command Byte */
+                udelay(50);
+                kb_wait();
+                udelay(50);
+                outb(cmd | 0x04, 0x60); /* set "System flag" */
+                udelay(50);
+                kb_wait();
+                udelay(50);
+                outb(0xfe, 0x64);       /* pulse reset low */
+                udelay(50);
+        }
+}
+
+#endif /* !_MACH_REBOOT_H */