1 files changed, 86 insertions, 0 deletions
diff --git a/roms/ipxe/src/core/acpi.c b/roms/ipxe/src/core/acpi.c
new file mode 100644
index 00000000..330f5063
--- /dev/null
+++ b/roms/ipxe/src/core/acpi.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <errno.h>
+#include <ipxe/acpi.h>
+#include <ipxe/interface.h>
+
+/** @file
+ *
+ * ACPI support functions
+ *
+ */
+
+/******************************************************************************
+ *
+ * Utility functions
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Fix up ACPI table checksum
+ *
+ * @v acpi		ACPI table header
+ */
+void acpi_fix_checksum ( struct acpi_description_header *acpi ) {
+	unsigned int i = 0;
+	uint8_t sum = 0;
+
+	for ( i = 0 ; i < acpi->length ; i++ ) {
+		sum += *( ( ( uint8_t * ) acpi ) + i );
+	}
+	acpi->checksum -= sum;
+}
+
+/******************************************************************************
+ *
+ * Interface methods
+ *
+ ******************************************************************************
+ */
+
+/**
+ * Describe object in an ACPI table
+ *
+ * @v intf		Interface
+ * @v acpi		ACPI table
+ * @v len		Length of ACPI table
+ * @ret rc		Return status code
+ */
+int acpi_describe ( struct interface *intf,
+		    struct acpi_description_header *acpi, size_t len ) {
+	struct interface *dest;
+	acpi_describe_TYPE ( void * ) *op =
+		intf_get_dest_op ( intf, acpi_describe, &dest );
+	void *object = intf_object ( dest );
+	int rc;
+
+	if ( op ) {
+		rc = op ( object, acpi, len );
+	} else {
+		/* Default is to fail to describe */
+		rc = -EOPNOTSUPP;
+	}
+
+	intf_put ( dest );
+	return rc;
+}