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-rw-r--r--drivers/acpi/acpica/utmisc.c382
1 files changed, 382 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utmisc.c b/drivers/acpi/acpica/utmisc.c
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index 000000000..8638efacd
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+++ b/drivers/acpi/acpica/utmisc.c
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+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/*******************************************************************************
+ *
+ * Module Name: utmisc - common utility procedures
+ *
+ ******************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+
+#define _COMPONENT ACPI_UTILITIES
+ACPI_MODULE_NAME("utmisc")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_is_pci_root_bridge
+ *
+ * PARAMETERS: id - The HID/CID in string format
+ *
+ * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
+ *
+ * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
+ *
+ ******************************************************************************/
+u8 acpi_ut_is_pci_root_bridge(char *id)
+{
+
+ /*
+ * Check if this is a PCI root bridge.
+ * ACPI 3.0+: check for a PCI Express root also.
+ */
+ if (!(strcmp(id,
+ PCI_ROOT_HID_STRING)) ||
+ !(strcmp(id, PCI_EXPRESS_ROOT_HID_STRING))) {
+ return (TRUE);
+ }
+
+ return (FALSE);
+}
+
+#if (defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP || defined ACPI_NAMES_APP)
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_is_aml_table
+ *
+ * PARAMETERS: table - An ACPI table
+ *
+ * RETURN: TRUE if table contains executable AML; FALSE otherwise
+ *
+ * DESCRIPTION: Check ACPI Signature for a table that contains AML code.
+ * Currently, these are DSDT,SSDT,PSDT. All other table types are
+ * data tables that do not contain AML code.
+ *
+ ******************************************************************************/
+
+u8 acpi_ut_is_aml_table(struct acpi_table_header *table)
+{
+
+ /* These are the only tables that contain executable AML */
+
+ if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_DSDT) ||
+ ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_PSDT) ||
+ ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_SSDT) ||
+ ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_OSDT) ||
+ ACPI_IS_OEM_SIG(table->signature)) {
+ return (TRUE);
+ }
+
+ return (FALSE);
+}
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_dword_byte_swap
+ *
+ * PARAMETERS: value - Value to be converted
+ *
+ * RETURN: u32 integer with bytes swapped
+ *
+ * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
+ *
+ ******************************************************************************/
+
+u32 acpi_ut_dword_byte_swap(u32 value)
+{
+ union {
+ u32 value;
+ u8 bytes[4];
+ } out;
+ union {
+ u32 value;
+ u8 bytes[4];
+ } in;
+
+ ACPI_FUNCTION_ENTRY();
+
+ in.value = value;
+
+ out.bytes[0] = in.bytes[3];
+ out.bytes[1] = in.bytes[2];
+ out.bytes[2] = in.bytes[1];
+ out.bytes[3] = in.bytes[0];
+
+ return (out.value);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_set_integer_width
+ *
+ * PARAMETERS: Revision From DSDT header
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Set the global integer bit width based upon the revision
+ * of the DSDT. For Revision 1 and 0, Integers are 32 bits.
+ * For Revision 2 and above, Integers are 64 bits. Yes, this
+ * makes a difference.
+ *
+ ******************************************************************************/
+
+void acpi_ut_set_integer_width(u8 revision)
+{
+
+ if (revision < 2) {
+
+ /* 32-bit case */
+
+ acpi_gbl_integer_bit_width = 32;
+ acpi_gbl_integer_nybble_width = 8;
+ acpi_gbl_integer_byte_width = 4;
+ } else {
+ /* 64-bit case (ACPI 2.0+) */
+
+ acpi_gbl_integer_bit_width = 64;
+ acpi_gbl_integer_nybble_width = 16;
+ acpi_gbl_integer_byte_width = 8;
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_create_update_state_and_push
+ *
+ * PARAMETERS: object - Object to be added to the new state
+ * action - Increment/Decrement
+ * state_list - List the state will be added to
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create a new state and push it
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_create_update_state_and_push(union acpi_operand_object *object,
+ u16 action,
+ union acpi_generic_state **state_list)
+{
+ union acpi_generic_state *state;
+
+ ACPI_FUNCTION_ENTRY();
+
+ /* Ignore null objects; these are expected */
+
+ if (!object) {
+ return (AE_OK);
+ }
+
+ state = acpi_ut_create_update_state(object, action);
+ if (!state) {
+ return (AE_NO_MEMORY);
+ }
+
+ acpi_ut_push_generic_state(state_list, state);
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_walk_package_tree
+ *
+ * PARAMETERS: source_object - The package to walk
+ * target_object - Target object (if package is being copied)
+ * walk_callback - Called once for each package element
+ * context - Passed to the callback function
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Walk through a package, including subpackages
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_walk_package_tree(union acpi_operand_object *source_object,
+ void *target_object,
+ acpi_pkg_callback walk_callback, void *context)
+{
+ acpi_status status = AE_OK;
+ union acpi_generic_state *state_list = NULL;
+ union acpi_generic_state *state;
+ union acpi_operand_object *this_source_obj;
+ u32 this_index;
+
+ ACPI_FUNCTION_TRACE(ut_walk_package_tree);
+
+ state = acpi_ut_create_pkg_state(source_object, target_object, 0);
+ if (!state) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+
+ while (state) {
+
+ /* Get one element of the package */
+
+ this_index = state->pkg.index;
+ this_source_obj =
+ state->pkg.source_object->package.elements[this_index];
+ state->pkg.this_target_obj =
+ &state->pkg.source_object->package.elements[this_index];
+
+ /*
+ * Check for:
+ * 1) An uninitialized package element. It is completely
+ * legal to declare a package and leave it uninitialized
+ * 2) Not an internal object - can be a namespace node instead
+ * 3) Any type other than a package. Packages are handled in else
+ * case below.
+ */
+ if ((!this_source_obj) ||
+ (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) !=
+ ACPI_DESC_TYPE_OPERAND) ||
+ (this_source_obj->common.type != ACPI_TYPE_PACKAGE)) {
+ status =
+ walk_callback(ACPI_COPY_TYPE_SIMPLE,
+ this_source_obj, state, context);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ state->pkg.index++;
+ while (state->pkg.index >=
+ state->pkg.source_object->package.count) {
+ /*
+ * We've handled all of the objects at this level, This means
+ * that we have just completed a package. That package may
+ * have contained one or more packages itself.
+ *
+ * Delete this state and pop the previous state (package).
+ */
+ acpi_ut_delete_generic_state(state);
+ state = acpi_ut_pop_generic_state(&state_list);
+
+ /* Finished when there are no more states */
+
+ if (!state) {
+ /*
+ * We have handled all of the objects in the top level
+ * package just add the length of the package objects
+ * and exit
+ */
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /*
+ * Go back up a level and move the index past the just
+ * completed package object.
+ */
+ state->pkg.index++;
+ }
+ } else {
+ /* This is a subobject of type package */
+
+ status =
+ walk_callback(ACPI_COPY_TYPE_PACKAGE,
+ this_source_obj, state, context);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Push the current state and create a new one
+ * The callback above returned a new target package object.
+ */
+ acpi_ut_push_generic_state(&state_list, state);
+ state =
+ acpi_ut_create_pkg_state(this_source_obj,
+ state->pkg.this_target_obj,
+ 0);
+ if (!state) {
+
+ /* Free any stacked Update State objects */
+
+ while (state_list) {
+ state =
+ acpi_ut_pop_generic_state
+ (&state_list);
+ acpi_ut_delete_generic_state(state);
+ }
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+ }
+ }
+
+ /* We should never get here */
+
+ ACPI_ERROR((AE_INFO, "State list did not terminate correctly"));
+
+ return_ACPI_STATUS(AE_AML_INTERNAL);
+}
+
+#ifdef ACPI_DEBUG_OUTPUT
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_display_init_pathname
+ *
+ * PARAMETERS: type - Object type of the node
+ * obj_handle - Handle whose pathname will be displayed
+ * path - Additional path string to be appended.
+ * (NULL if no extra path)
+ *
+ * RETURN: acpi_status
+ *
+ * DESCRIPTION: Display full pathname of an object, DEBUG ONLY
+ *
+ ******************************************************************************/
+
+void
+acpi_ut_display_init_pathname(u8 type,
+ struct acpi_namespace_node *obj_handle,
+ const char *path)
+{
+ acpi_status status;
+ struct acpi_buffer buffer;
+
+ ACPI_FUNCTION_ENTRY();
+
+ /* Only print the path if the appropriate debug level is enabled */
+
+ if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
+ return;
+ }
+
+ /* Get the full pathname to the node */
+
+ buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
+ status = acpi_ns_handle_to_pathname(obj_handle, &buffer, TRUE);
+ if (ACPI_FAILURE(status)) {
+ return;
+ }
+
+ /* Print what we're doing */
+
+ switch (type) {
+ case ACPI_TYPE_METHOD:
+
+ acpi_os_printf("Executing ");
+ break;
+
+ default:
+
+ acpi_os_printf("Initializing ");
+ break;
+ }
+
+ /* Print the object type and pathname */
+
+ acpi_os_printf("%-12s %s",
+ acpi_ut_get_type_name(type), (char *)buffer.pointer);
+
+ /* Extra path is used to append names like _STA, _INI, etc. */
+
+ if (path) {
+ acpi_os_printf(".%s", path);
+ }
+ acpi_os_printf("\n");
+
+ ACPI_FREE(buffer.pointer);
+}
+#endif
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