[PATCH v3 05/32] acpi: add aml_concatenate

[Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>]

Implement Concatenate term which is used by NVDIMM _DSM method
in later patch

Signed-off-by: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx>
---
 hw/acpi/aml-build.c         | 14 ++++++++++++++
 include/hw/acpi/aml-build.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index ab52692..d3b071f 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -1196,6 +1196,20 @@ Aml *aml_release(Aml *mutex)
     return var;
 }
 
+/* ACPI 1.0b: 16.2.5.4 Type 2 Opcodes Encoding: DefConcat */
+Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target)
+{
+    Aml *var = aml_opcode(0x73 /* ConcatOp */);
+    aml_append(var, source1);
+    aml_append(var, source2);
+
+    if (target) {
+        aml_append(var, target);
+    }
+
+    return var;
+}
+
 void
 build_header(GArray *linker, GArray *table_data,
              AcpiTableHeader *h, const char *sig, int len, uint8_t rev)
diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
index d494c0c..d4b6d10 100644
--- a/include/hw/acpi/aml-build.h
+++ b/include/hw/acpi/aml-build.h
@@ -280,6 +280,7 @@ Aml *aml_create_field(Aml *srcbuf, Aml *index, Aml *len, const char *name);
 Aml *aml_mutex(const char *name, uint8_t flags);
 Aml *aml_acquire(Aml *mutex, uint16_t timeout);
 Aml *aml_release(Aml *mutex);
+Aml *aml_concatenate(Aml *source1, Aml *source2, Aml *target);
 
 void
 build_header(GArray *linker, GArray *table_data,
-- 
1.8.3.1

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