acpi: add aml_to_buffer()

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>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index 40ea1284b70d400d4a71fe96bb0efd2ec06808ab..9222e8fd90193bf504b2dd2f4d764af3331bb651 100644 (file)
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -449,6 +449,19 @@ Aml *aml_to_hexstring(Aml *src, Aml *dst)
     return var;
 }
 
+/* ACPI 2.0a: 17.2.4.4 Type 2 Opcodes Encoding: DefToBuffer */
+Aml *aml_to_buffer(Aml *src, Aml *dst)
+{
+    Aml *var = aml_opcode(0x96 /* ToBufferOp */);
+    aml_append(var, src);
+    if (dst) {
+        aml_append(var, dst);
+    } else {
+        build_append_byte(var->buf, 0x00 /* NullNameOp */);
+    }
+    return var;
+}
+
 /* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefStore */
 Aml *aml_store(Aml *val, Aml *target)
 {

diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index 7fafda8c24fdf41500ac9dd3ba4f3cade48342d5..d906105a82da6ce7d13ccac9936b9d12ec78a053 100644 (file)
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -231,6 +231,7 @@ Aml *aml_int(const uint64_t val);
 Aml *aml_arg(int pos);
 Aml *aml_to_integer(Aml *arg);
 Aml *aml_to_hexstring(Aml *src, Aml *dst);
+Aml *aml_to_buffer(Aml *src, Aml *dst);
 Aml *aml_store(Aml *val, Aml *target);
 Aml *aml_and(Aml *arg1, Aml *arg2);
 Aml *aml_or(Aml *arg1, Aml *arg2);