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