acpi: add aml_if() term

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 4e0685e..d19d1fb 100644 (file)
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -356,6 +356,14 @@ Aml *aml_scope(const char *name_format, ...)
     return var;
 }
 
+/* ACPI 1.0b: 16.2.5.3 Type 1 Opcodes Encoding: DefIfElse */
+Aml *aml_if(Aml *predicate)
+{
+    Aml *var = aml_bundle(0xA0 /* IfOp */, AML_PACKAGE);
+    aml_append(var, predicate);
+    return var;
+}
+
 /* ACPI 1.0b: 16.2.5.2 Named Objects Encoding: DefMethod */
 Aml *aml_method(const char *name, int arg_count)
 {

diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 97e210a..13cc9e9 100644 (file)
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -63,6 +63,7 @@ void aml_append(Aml *parent_ctx, Aml *child);
 Aml *aml_scope(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
 Aml *aml_device(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
 Aml *aml_method(const char *name, int arg_count);
+Aml *aml_if(Aml *predicate);
 
 /* other helpers */
 GArray *build_alloc_array(void);