1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utuuid.c b/drivers/acpi/acpica/utuuid.c
new file mode 100644
index 000000000..e24bc670b
--- /dev/null
+++ b/drivers/acpi/acpica/utuuid.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: utuuid -- UUID support functions
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_COMPILER
+ACPI_MODULE_NAME("utuuid")
+
+#if (defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP || defined ACPI_HELP_APP)
+/*
+ * UUID support functions.
+ *
+ * This table is used to convert an input UUID ascii string to a 16 byte
+ * buffer and the reverse. The table maps a UUID buffer index 0-15 to
+ * the index within the 36-byte UUID string where the associated 2-byte
+ * hex value can be found.
+ *
+ * 36-byte UUID strings are of the form:
+ *     aabbccdd-eeff-gghh-iijj-kkllmmnnoopp
+ * Where aa-pp are one byte hex numbers, made up of two hex digits
+ *
+ * Note: This table is basically the inverse of the string-to-offset table
+ * found in the ACPI spec in the description of the to_UUID macro.
+ */
+const u8 acpi_gbl_map_to_uuid_offset[UUID_BUFFER_LENGTH] = {
+	6, 4, 2, 0, 11, 9, 16, 14, 19, 21, 24, 26, 28, 30, 32, 34
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_convert_string_to_uuid
+ *
+ * PARAMETERS:  in_string           - 36-byte formatted UUID string
+ *              uuid_buffer         - Where the 16-byte UUID buffer is returned
+ *
+ * RETURN:      None. Output data is returned in the uuid_buffer
+ *
+ * DESCRIPTION: Convert a 36-byte formatted UUID string to 16-byte UUID buffer
+ *
+ ******************************************************************************/
+
+void acpi_ut_convert_string_to_uuid(char *in_string, u8 *uuid_buffer)
+{
+	u32 i;
+
+	for (i = 0; i < UUID_BUFFER_LENGTH; i++) {
+		uuid_buffer[i] =
+		    (acpi_ut_ascii_char_to_hex
+		     (in_string[acpi_gbl_map_to_uuid_offset[i]]) << 4);
+
+		uuid_buffer[i] |=
+		    acpi_ut_ascii_char_to_hex(in_string
+					      [acpi_gbl_map_to_uuid_offset[i] +
+					       1]);
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_convert_uuid_to_string
+ *
+ * PARAMETERS:  uuid_buffer         - 16-byte UUID buffer
+ *              out_string          - 36-byte formatted UUID string
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert 16-byte UUID buffer to 36-byte formatted UUID string
+ *              out_string must be 37 bytes to include null terminator.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ut_convert_uuid_to_string(char *uuid_buffer, char *out_string)
+{
+	u32 i;
+
+	if (!uuid_buffer || !out_string) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	for (i = 0; i < UUID_BUFFER_LENGTH; i++) {
+		out_string[acpi_gbl_map_to_uuid_offset[i]] =
+		    acpi_ut_hex_to_ascii_char(uuid_buffer[i], 4);
+
+		out_string[acpi_gbl_map_to_uuid_offset[i] + 1] =
+		    acpi_ut_hex_to_ascii_char(uuid_buffer[i], 0);
+	}
+
+	/* Insert required hyphens (dashes) */
+
+	out_string[UUID_HYPHEN1_OFFSET] =
+	    out_string[UUID_HYPHEN2_OFFSET] =
+	    out_string[UUID_HYPHEN3_OFFSET] =
+	    out_string[UUID_HYPHEN4_OFFSET] = '-';
+
+	out_string[UUID_STRING_LENGTH] = 0;	/* Null terminate */
+	return (AE_OK);
+}
+#endif