acpigen: Add function to generate ToUUID() from a string

acpigen_write_uuid() will generate a ToUUID() 128-bit buffer object for a
common universally unique identifier that is passed as a string.  The
resulting buffer is the UUID in byte format with a specific order of the
bytes as described in the ACPI specification:

  ToUUID (uuid)

Compiles to:

  Buffer (16) { uuid[3], uuid[2], uuid[1], uuid[0], uuid[5], uuid[4],
                uuid[7], uuid[6], uuid[8], uuid[9], uuid[10], uuid[11],
                uuid[12], uuid[13], uuid[14], uuid[15] }

Change-Id: Ibbeff926883532dd78477aaa2d26ffffb6ef30c0
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/14838
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h
index e968778e5c..9e6ef2958f 100644
--- a/src/arch/x86/include/arch/acpigen.h
+++ b/src/arch/x86/include/arch/acpigen.h
@@ -92,6 +92,7 @@ void acpigen_write_resourcetemplate_footer(void);
 void acpigen_write_mainboard_resource_template(void);
 void acpigen_write_mainboard_resources(const char *scope, const char *name);
 void acpigen_write_irq(u16 mask);
+void acpigen_write_uuid(const char *uuid);
 
 int get_cst_entries(acpi_cstate_t **);