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authorBob Moore <robert.moore@intel.com>2012-05-22 10:22:01 +0200
committerLen Brown <len.brown@intel.com>2012-06-01 17:51:51 +0200
commit6ccd7b5acc418e02953a8dd8a3c17e04907aacff (patch)
treece2c0285bc1aa9296a6575c16e8d07f928188509 /drivers/acpi/acpica/dsfield.c
parentACPICA: Update to version 20120420 (diff)
downloadlinux-6ccd7b5acc418e02953a8dd8a3c17e04907aacff.tar.xz
linux-6ccd7b5acc418e02953a8dd8a3c17e04907aacff.zip
ACPICA: Disassembler: Add support for Operation Region externals
Adds missing support for operation regions defined in another table, but referenced via a Field or BankField operator. Generate the correct External statement. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/dsfield.c')
-rw-r--r--drivers/acpi/acpica/dsfield.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/dsfield.c b/drivers/acpi/acpica/dsfield.c
index cd243cf2cab2..809843923d64 100644
--- a/drivers/acpi/acpica/dsfield.c
+++ b/drivers/acpi/acpica/dsfield.c
@@ -53,11 +53,79 @@
ACPI_MODULE_NAME("dsfield")
/* Local prototypes */
+#ifdef ACPI_ASL_COMPILER
+#include "acdisasm.h"
+static acpi_status
+acpi_ds_create_external_region(acpi_status lookup_status,
+ union acpi_parse_object *op,
+ char *path,
+ struct acpi_walk_state *walk_state,
+ struct acpi_namespace_node **node);
+#endif
+
static acpi_status
acpi_ds_get_field_names(struct acpi_create_field_info *info,
struct acpi_walk_state *walk_state,
union acpi_parse_object *arg);
+#ifdef ACPI_ASL_COMPILER
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ds_create_external_region (i_aSL Disassembler only)
+ *
+ * PARAMETERS: lookup_status - Status from ns_lookup operation
+ * Op - Op containing the Field definition and args
+ * Path - Pathname of the region
+ * ` walk_state - Current method state
+ * Node - Where the new region node is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new
+ * region node/object.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ds_create_external_region(acpi_status lookup_status,
+ union acpi_parse_object *op,
+ char *path,
+ struct acpi_walk_state *walk_state,
+ struct acpi_namespace_node **node)
+{
+ acpi_status status;
+ union acpi_operand_object *obj_desc;
+
+ if (lookup_status != AE_NOT_FOUND) {
+ return (lookup_status);
+ }
+
+ /*
+ * Table disassembly:
+ * operation_region not found. Generate an External for it, and
+ * insert the name into the namespace.
+ */
+ acpi_dm_add_to_external_list(op, path, ACPI_TYPE_REGION, 0);
+ status = acpi_ns_lookup(walk_state->scope_info, path, ACPI_TYPE_REGION,
+ ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
+ walk_state, node);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /* Must create and install a region object for the new node */
+
+ obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);
+ if (!obj_desc) {
+ return (AE_NO_MEMORY);
+ }
+
+ obj_desc->region.node = *node;
+ status = acpi_ns_attach_object(*node, obj_desc, ACPI_TYPE_REGION);
+ return (status);
+}
+#endif
+
/*******************************************************************************
*
* FUNCTION: acpi_ds_create_buffer_field
@@ -413,12 +481,19 @@ acpi_ds_create_field(union acpi_parse_object *op,
/* First arg is the name of the parent op_region (must already exist) */
arg = op->common.value.arg;
+
if (!region_node) {
status =
acpi_ns_lookup(walk_state->scope_info,
arg->common.value.name, ACPI_TYPE_REGION,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
walk_state, &region_node);
+#ifdef ACPI_ASL_COMPILER
+ status = acpi_ds_create_external_region(status, arg,
+ arg->common.value.name,
+ walk_state,
+ &region_node);
+#endif
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE(arg->common.value.name, status);
return_ACPI_STATUS(status);
@@ -591,6 +666,12 @@ acpi_ds_create_bank_field(union acpi_parse_object *op,
arg->common.value.name, ACPI_TYPE_REGION,
ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
walk_state, &region_node);
+#ifdef ACPI_ASL_COMPILER
+ status = acpi_ds_create_external_region(status, arg,
+ arg->common.value.name,
+ walk_state,
+ &region_node);
+#endif
if (ACPI_FAILURE(status)) {
ACPI_ERROR_NAMESPACE(arg->common.value.name, status);
return_ACPI_STATUS(status);