[SeaBIOS] [PATCH v2 4/6] acpi_extract: detect DeviceOp

[Paolo Bonzini]

The DeviceOp AML opcode has more or less the same structure as ProcessorOp,
except that there is no processor ID.

Signed-off-by: Paolo Bonzini <pbonzini at redhat.com>
---
 tools/acpi_extract.py |   28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/tools/acpi_extract.py b/tools/acpi_extract.py
index 81fa4aa..3295678 100755
--- a/tools/acpi_extract.py
+++ b/tools/acpi_extract.py
@@ -164,6 +164,28 @@ def aml_name_word_const(offset):
 def aml_name_byte_const(offset):
     return aml_data_byte_const(aml_name_string(offset) + 4)
 
+def aml_device_start(offset):
+    #0x5B 0x82 DeviceOp PkgLength NameString
+    if ((aml[offset] != 0x5B) or (aml[offset + 1] != 0x82)):
+        die( "Name offset 0x%x: expected 0x5B 0x82 actual 0x%x 0x%x" %
+             (offset, aml[offset], aml[offset + 1]));
+    return offset
+
+def aml_device_string(offset):
+    #0x5B 0x82 DeviceOp PkgLength NameString
+    start = aml_device_start(offset)
+    offset += 2
+    pkglenbytes = aml_pkglen_bytes(offset)
+    offset += pkglenbytes
+    return offset
+
+def aml_device_end(offset):
+    start = aml_device_start(offset)
+    offset += 2
+    pkglenbytes = aml_pkglen_bytes(offset)
+    pkglen = aml_pkglen(offset)
+    return offset + pkglen
+
 def aml_processor_start(offset):
     #0x5B 0x83 ProcessorOp PkgLength NameString ProcID
     if ((aml[offset] != 0x5B) or (aml[offset + 1] != 0x83)):
@@ -271,6 +293,12 @@ for i in range(len(asl)):
         offset = aml_name_string(offset)
     elif (directive == "ACPI_EXTRACT_METHOD_STRING"):
         offset = aml_method_string(offset)
+    elif (directive == "ACPI_EXTRACT_DEVICE_START"):
+        offset = aml_device_start(offset)
+    elif (directive == "ACPI_EXTRACT_DEVICE_STRING"):
+        offset = aml_device_string(offset)
+    elif (directive == "ACPI_EXTRACT_DEVICE_END"):
+        offset = aml_device_end(offset)
     elif (directive == "ACPI_EXTRACT_PROCESSOR_START"):
         offset = aml_processor_start(offset)
     elif (directive == "ACPI_EXTRACT_PROCESSOR_STRING"):
-- 
1.7.10.4