1 files changed, 43 insertions, 0 deletions
diff --git a/arch/x86/include/asm/ioapic.h b/arch/x86/include/asm/ioapic.h
new file mode 100644
index 0000000..9e004e9
--- /dev/null
+++ b/arch/x86/include/asm/ioapic.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * From coreboot file of the same name
+ *
+ * Copyright (C) 2010 coresystems GmbH
+ */
+
+#ifndef __ASM_IOAPIC_H
+#define __ASM_IOAPIC_H
+
+#define IO_APIC_ADDR		0xfec00000
+
+/* Direct addressed register */
+#define IO_APIC_INDEX		(IO_APIC_ADDR + 0x00)
+#define IO_APIC_DATA		(IO_APIC_ADDR + 0x10)
+
+/* Indirect addressed register offset */
+#define IO_APIC_ID		0x00
+#define IO_APIC_VER		0x01
+
+/**
+ * io_apic_read() - Read I/O APIC register
+ *
+ * This routine reads I/O APIC indirect addressed register.
+ *
+ * @reg:	address of indirect addressed register
+ * @return:	register value to read
+ */
+u32 io_apic_read(u32 reg);
+
+/**
+ * io_apic_write() - Write I/O APIC register
+ *
+ * This routine writes I/O APIC indirect addressed register.
+ *
+ * @reg:	address of indirect addressed register
+ * @val:	register value to write
+ */
+void io_apic_write(u32 reg, u32 val);
+
+void io_apic_set_id(int ioapic_id);
+
+#endif