acpi: add aml_resource_template() helper

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

hw/acpi/aml-build.c

@@ -506,6 +506,14 @@ Aml *aml_device(const char *name_format, ...)
     return var;
 }
 
+/* ACPI 1.0b: 6.4.1 ASL Macros for Resource Descriptors */
+Aml *aml_resource_template(void)
+{
+    /* ResourceTemplate is a buffer of Resources with EndTag at the end */
+    Aml *var = aml_bundle(0x11 /* BufferOp */, AML_RES_TEMPLATE);
+    return var;
+}
+
 /* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefBuffer */
 Aml *aml_buffer(void)
 {

include/hw/acpi/aml-build.h

@@ -80,6 +80,7 @@ Aml *aml_method(const char *name, int arg_count);
 Aml *aml_if(Aml *predicate);
 Aml *aml_package(uint8_t num_elements);
 Aml *aml_buffer(void);
+Aml *aml_resource_template(void);
 
 /* other helpers */
 GArray *build_alloc_array(void);