acpi_status
bm_get_node (
BM_HANDLE device_handle,
acpi_handle acpi_handle,
BM_NODE **node)
{
acpi_status status = AE_OK;
FUNCTION_TRACE("bm_get_node");
if (!node) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* busmgr failed to init, but we're being called by subordinate drivers */
if (node_list.count < 1) {
return_ACPI_STATUS(AE_NOT_FOUND);
}
/*
* If no device handle, resolve acpi handle to device handle.
*/
if (!device_handle && acpi_handle) {
status = bm_get_handle(acpi_handle, &device_handle);
if (ACPI_FAILURE(status))
return_ACPI_STATUS(status);
}
/*
* Valid device handle?
*/
if (device_handle > BM_HANDLES_MAX) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid node handle [%02x] detected.\n", device_handle));
return_ACPI_STATUS(AE_ERROR);
}
*node = node_list.nodes[device_handle];
/*
* Valid node?
*/
if (!(*node)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid (NULL) node entry [%02x] detected.\n", device_handle));
return_ACPI_STATUS(AE_NULL_ENTRY);
}
return_ACPI_STATUS(AE_OK);
}
acpi_status
bm_evaluate_reference_list (
acpi_handle handle,
acpi_string pathname,
BM_HANDLE_LIST *reference_list)
{
acpi_status status = AE_OK;
acpi_object *package = NULL;
acpi_object *element = NULL;
acpi_handle reference_handle = NULL;
acpi_buffer buffer;
u32 i = 0;
FUNCTION_TRACE("bm_evaluate_reference_list");
if (!reference_list) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
MEMSET(&buffer, 0, sizeof(acpi_buffer));
/*
* Evaluate Object:
* ----------------
*/
status = bm_evaluate_object(handle, pathname, NULL, &buffer);
if (ACPI_FAILURE(status)) {
goto end;
}
/*
* Validate Package:
* -----------------
*/
status = bm_cast_buffer(&buffer, (void**)&package,
sizeof(acpi_object));
if (ACPI_FAILURE(status)) {
DEBUG_EVAL_ERROR(ACPI_LV_WARN, handle, pathname, status);
goto end;
}
if (package->type != ACPI_TYPE_PACKAGE) {
status = AE_BAD_DATA;
DEBUG_EVAL_ERROR(ACPI_LV_WARN, handle, pathname, status);
goto end;
}
if (package->package.count > BM_HANDLES_MAX) {
package->package.count = BM_HANDLES_MAX;
}
/*
* Parse Package Data:
* -------------------
*/
for (i = 0; i < package->package.count; i++) {
element = &(package->package.elements[i]);
if (!element || (element->type != ACPI_TYPE_STRING)) {
status = AE_BAD_DATA;
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid element in package (not a device reference).\n"));
DEBUG_EVAL_ERROR (ACPI_LV_WARN, handle, pathname, status);
break;
}
/*
* Resolve reference string (e.g. "\_PR_.CPU_") to an
* acpi_handle.
*/
status = acpi_get_handle(handle,
element->string.pointer, &reference_handle);
if (ACPI_FAILURE(status)) {
status = AE_BAD_DATA;
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Unable to resolve device reference [%s].\n", element->string.pointer));
DEBUG_EVAL_ERROR (ACPI_LV_WARN, handle, pathname, status);
break;
}
/*
* Resolve acpi_handle to BM_HANDLE.
*/
status = bm_get_handle(reference_handle,
&(reference_list->handles[i]));
if (ACPI_FAILURE(status)) {
status = AE_BAD_DATA;
ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Unable to resolve device reference for [%p].\n", reference_handle));
DEBUG_EVAL_ERROR (ACPI_LV_WARN, handle, pathname, status);
break;
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resolved reference [%s]->[%p]->[%02x]\n", element->string.pointer, reference_handle, reference_list->handles[i]));
(reference_list->count)++;
}
end:
acpi_os_free(buffer.pointer);
return_ACPI_STATUS(status);
}
