1 files changed, 18 insertions, 0 deletions

diff --git a/arch/x86/include/asm/i8253.h b/arch/x86/include/asm/i8253.h
new file mode 100644
index 00000000000..15a5b530044
--- /dev/null
+++ b/arch/x86/include/asm/i8253.h
@@ -0,0 +1,18 @@
+#ifndef ASM_X86__I8253_H
+#define ASM_X86__I8253_H
+
+/* i8253A PIT registers */
+#define PIT_MODE                0x43
+#define PIT_CH0                 0x40
+#define PIT_CH2                 0x42
+
+extern spinlock_t i8253_lock;
+
+extern struct clock_event_device *global_clock_event;
+
+extern void setup_pit_timer(void);
+
+#define inb_pit         inb_p
+#define outb_pit        outb_p
+
+#endif /* ASM_X86__I8253_H */