acpigen: Add methods for mutex operations

Tested on Linux 5.2:
Dumped and decoded the ACPI tables using iasl.

Change-Id: I79310b0f9e2297cf8428d11598935164caf95968
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37637
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/arch/x86/include/arch/acpigen.h b/src/arch/x86/include/arch/acpigen.h
index 6fd9f73e05..8b8c873fb5 100644
--- a/src/arch/x86/include/arch/acpigen.h
+++ b/src/arch/x86/include/arch/acpigen.h
@@ -411,6 +411,21 @@ void acpigen_write_rom(void *bios, const size_t length);
  */
 void acpigen_write_opregion(struct opregion *opreg);
 /*
+ * Generate ACPI AML code for Mutex
+ * This function takes mutex name and initial value.
+ */
+void acpigen_write_mutex(const char *name, const uint8_t flags);
+/*
+ * Generate ACPI AML code for Acquire
+ * This function takes mutex name and privilege value.
+ */
+void acpigen_write_acquire(const char *name, const uint16_t val);
+/*
+ * Generate ACPI AML code for Release
+ * This function takes mutex name.
+ */
+void acpigen_write_release(const char *name);
+/*
  * Generate ACPI AML code for Field
  * This function takes input region name, fieldlist, count & flags.
  */