acpi: add aml_operation_region() 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>

1 files changed, 14 insertions, 0 deletions

diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
index cc883ccb95..d72d5b45c8 100644
--- a/hw/acpi/aml-build.c
+++ b/hw/acpi/aml-build.c
@@ -554,3 +554,17 @@ Aml *aml_package(uint8_t num_elements)
     build_append_byte(var->buf, num_elements);
     return var;
 }
+
+/* ACPI 1.0b: 16.2.5.2 Named Objects Encoding: DefOpRegion */
+Aml *aml_operation_region(const char *name, AmlRegionSpace rs,
+                          uint32_t offset, uint32_t len)
+{
+    Aml *var = aml_alloc();
+    build_append_byte(var->buf, 0x5B); /* ExtOpPrefix */
+    build_append_byte(var->buf, 0x80); /* OpRegionOp */
+    build_append_namestring(var->buf, "%s", name);
+    build_append_byte(var->buf, rs);
+    build_append_int(var->buf, offset);
+    build_append_int(var->buf, len);
+    return var;
+}