acpi: add aml_return() 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>
qemu · Feb 26, 2015 · b25af5a · b25af5a
1 parent 295a515
commit b25af5a
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diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
@@ -355,6 +355,14 @@ Aml *aml_scope(const char *name_format, ...)
     return var;
 }
 
+/* ACPI 1.0b: 16.2.5.3 Type 1 Opcodes Encoding: DefReturn */
+Aml *aml_return(Aml *val)
+{
+    Aml *var = aml_opcode(0xA4 /* ReturnOp */);
+    aml_append(var, val);
+    return var;
+}
+
 /*
  * ACPI 1.0b: 16.2.3 Data Objects Encoding:
  * encodes: ByteConst, WordConst, DWordConst, QWordConst, ZeroOp, OneOp

diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
@@ -62,6 +62,7 @@ void aml_append(Aml *parent_ctx, Aml *child);
 /* non block AML object primitives */
 Aml *aml_name(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
 Aml *aml_name_decl(const char *name, Aml *val);
+Aml *aml_return(Aml *val);
 Aml *aml_int(const uint64_t val);
 
 /* Block AML object primitives */