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-rw-r--r--drivers/acpi/acpica/rscreate.c64
-rw-r--r--include/acpi/acpixf.h5
2 files changed, 69 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/rscreate.c b/drivers/acpi/acpica/rscreate.c
index f61285d5edc..06264e8b58d 100644
--- a/drivers/acpi/acpica/rscreate.c
+++ b/drivers/acpi/acpica/rscreate.c
@@ -51,6 +51,70 @@ ACPI_MODULE_NAME("rscreate")
/*******************************************************************************
*
+ * FUNCTION: acpi_buffer_to_resource
+ *
+ * PARAMETERS: aml_buffer - Pointer to the resource byte stream
+ * aml_buffer_length - Length of the aml_buffer
+ * resource_ptr - Where the converted resource is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Convert a raw AML buffer to a resource list
+ *
+ ******************************************************************************/
+acpi_status
+acpi_buffer_to_resource(u8 *aml_buffer,
+ u16 aml_buffer_length,
+ struct acpi_resource **resource_ptr)
+{
+ acpi_status status;
+ acpi_size list_size_needed;
+ void *resource;
+ void *current_resource_ptr;
+
+ /*
+ * Note: we allow AE_AML_NO_RESOURCE_END_TAG, since an end tag
+ * is not required here.
+ */
+
+ /* Get the required length for the converted resource */
+
+ status = acpi_rs_get_list_length(aml_buffer, aml_buffer_length,
+ &list_size_needed);
+ if (status == AE_AML_NO_RESOURCE_END_TAG) {
+ status = AE_OK;
+ }
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /* Allocate a buffer for the converted resource */
+
+ resource = ACPI_ALLOCATE_ZEROED(list_size_needed);
+ current_resource_ptr = resource;
+ if (!resource) {
+ return (AE_NO_MEMORY);
+ }
+
+ /* Perform the AML-to-Resource conversion */
+
+ status = acpi_ut_walk_aml_resources(aml_buffer, aml_buffer_length,
+ acpi_rs_convert_aml_to_resources,
+ &current_resource_ptr);
+ if (status == AE_AML_NO_RESOURCE_END_TAG) {
+ status = AE_OK;
+ }
+ if (ACPI_FAILURE(status)) {
+ ACPI_FREE(resource);
+ } else {
+ *resource_ptr = resource;
+ }
+
+ return (status);
+}
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_rs_create_resource_list
*
* PARAMETERS: aml_buffer - Pointer to the resource byte stream
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 726d937ef5b..5d8df1dfb20 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -376,6 +376,11 @@ acpi_status
acpi_resource_to_address64(struct acpi_resource *resource,
struct acpi_resource_address64 *out);
+acpi_status
+acpi_buffer_to_resource(u8 *aml_buffer,
+ u16 aml_buffer_length,
+ struct acpi_resource **resource_ptr);
+
/*
* Hardware (ACPI device) interfaces
*/