x86: acpi: Add some generic ASL libraries

This adds several generic ASL libraries that can be included by
other ASL files, which are:

- debug.asl: for debug output using POST I/O port and legacy serial port
- globutil.asl: for string compare routines
- statdef.asl: for _STA status values

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Tested-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 113 insertions, 0 deletions

diff --git a/arch/x86/include/asm/acpi/globutil.asl b/arch/x86/include/asm/acpi/globutil.asl
new file mode 100644
index 0000000000..46381b687e
--- /dev/null
+++ b/arch/x86/include/asm/acpi/globutil.asl
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2008 Advanced Micro Devices, Inc.
+ * Copyright (C) 2016 Bin Meng <bmeng.cn@gmail.com>
+ *
+ * Modified from coreboot src/arch/x86/acpi/globutil.asl
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+Method(MIN, 2)
+{
+	If (LLess(Arg0, Arg1)) {
+		Return (Arg0)
+	} Else {
+		Return (Arg1)
+	}
+}
+
+Method(SLEN, 1)
+{
+	Store(Arg0, Local0)
+	Return (Sizeof(Local0))
+}
+
+Method(S2BF, 1, Serialized)
+{
+	Add(SLEN(Arg0), One, Local0)
+	Name(BUFF, Buffer(Local0) {})
+	Store(Arg0, BUFF)
+	Return (BUFF)
+}
+
+/*
+ * SCMP - Strong string compare
+ *
+ * Checks both length and content
+ */
+Method(SCMP, 2)
+{
+	Store(S2BF(Arg0), Local0)
+	Store(S2BF(Arg1), Local1)
+	Store(Zero, Local4)
+	Store(SLEN(Arg0), Local5)
+	Store(SLEN(Arg1), Local6)
+	Store(MIN(Local5, Local6), Local7)
+
+	While (LLess(Local4, Local7)) {
+		Store(Derefof(Index(Local0, Local4)), Local2)
+		Store(Derefof(Index(Local1, Local4)), Local3)
+		If (LGreater(Local2, Local3)) {
+			Return (One)
+		} Else {
+			If (LLess(Local2, Local3)) {
+				Return (Ones)
+			}
+		}
+		Increment(Local4)
+	}
+
+	If (LLess(Local4, Local5)) {
+		Return (One)
+	} Else {
+		If (LLess(Local4, Local6)) {
+			Return (Ones)
+		} Else {
+			Return (Zero)
+		}
+	}
+}
+
+/*
+ * WCMP - Weak string compare
+ *
+ * Checks to find Arg1 at beginning of Arg0.
+ * Fails if length(Arg0) < length(Arg1).
+ * Returns 0 on fail, 1 on pass.
+ */
+Method(WCMP, 2)
+{
+	Store(S2BF(Arg0), Local0)
+	Store(S2BF(Arg1), Local1)
+	If (LLess(SLEN(Arg0), SLEN(Arg1))) {
+		Return (Zero)
+	}
+	Store(Zero, Local2)
+	Store(SLEN(Arg1), Local3)
+
+	While (LLess(Local2, Local3)) {
+		If (LNotEqual(Derefof(Index(Local0, Local2)),
+			Derefof(Index(Local1, Local2)))) {
+			Return (Zero)
+		}
+		Increment(Local2)
+	}
+
+	Return (One)
+}
+
+/*
+ * I2BM - Returns Bit Map
+ *
+ * Arg0 = IRQ Number (0-15)
+ */
+Method(I2BM, 1)
+{
+	Store(0, Local0)
+	If (LNotEqual(Arg0, 0)) {
+		Store(1, Local1)
+		ShiftLeft(Local1, Arg0, Local0)
+	}
+
+	Return (Local0)
+}