x86: Add a simple header file for ACPI

We don't use many features yet, so this only has a few declarations.
It will be expanded as needed.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
new file mode 100644 (file)
index 0000000..4872b92
--- /dev/null
+++ b/arch/x86/include/asm/acpi.h
@@ -0,0 +1,24 @@
+/*
+ * From coreboot
+ *
+ * Copyright (C) 2004 SUSE LINUX AG
+ * Copyright (C) 2004 Nick Barker
+ * Copyright (C) 2008-2009 coresystems GmbH
+ * (Written by Stefan Reinauer <stepan@coresystems.de>)
+ *
+ * SPDX-License-Identifier:    GPL-2.0
+ */
+
+#ifndef __ASM_ACPI_H
+#define __ASM_ACPI_H
+
+#define RSDP_SIG               "RSD PTR "  /* RSDT pointer signature */
+#define ACPI_TABLE_CREATOR     "U-BootAC"  /* Must be exactly 8 bytes long! */
+#define OEM_ID                 "U-Boot"    /* Must be exactly 6 bytes long! */
+#define ASLC                   "U-Bo"      /* Must be exactly 4 bytes long! */
+
+/* 0 = S0, 1 = S1 ...*/
+int acpi_get_slp_type(void);
+void apci_set_slp_type(int type);
+
+#endif