// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: tbxface - ACPI table-oriented external interfaces * * Copyright (C) 2000 - 2023, Intel Corp. * *****************************************************************************/ #define EXPORT_ACPI_INTERFACES #include <acpi/acpi.h> #include "accommon.h" #include "actables.h" #define _COMPONENT … ACPI_MODULE_NAME("tbxface") /******************************************************************************* * * FUNCTION: acpi_allocate_root_table * * PARAMETERS: initial_table_count - Size of initial_table_array, in number of * struct acpi_table_desc structures * * RETURN: Status * * DESCRIPTION: Allocate a root table array. Used by iASL compiler and * acpi_initialize_tables. * ******************************************************************************/ acpi_status acpi_allocate_root_table(u32 initial_table_count) { … } /******************************************************************************* * * FUNCTION: acpi_initialize_tables * * PARAMETERS: initial_table_array - Pointer to an array of pre-allocated * struct acpi_table_desc structures. If NULL, the * array is dynamically allocated. * initial_table_count - Size of initial_table_array, in number of * struct acpi_table_desc structures * allow_resize - Flag to tell Table Manager if resize of * pre-allocated array is allowed. Ignored * if initial_table_array is NULL. * * RETURN: Status * * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT. * * NOTE: Allows static allocation of the initial table array in order * to avoid the use of dynamic memory in confined environments * such as the kernel boot sequence where it may not be available. * * If the host OS memory managers are initialized, use NULL for * initial_table_array, and the table will be dynamically allocated. * ******************************************************************************/ acpi_status ACPI_INIT_FUNCTION acpi_initialize_tables(struct acpi_table_desc *initial_table_array, u32 initial_table_count, u8 allow_resize) { … } ACPI_EXPORT_SYMBOL_INIT(…) /******************************************************************************* * * FUNCTION: acpi_reallocate_root_table * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the * root list from the previously provided scratch area. Should * be called once dynamic memory allocation is available in the * kernel. * ******************************************************************************/ acpi_status ACPI_INIT_FUNCTION acpi_reallocate_root_table(void) { … } ACPI_EXPORT_SYMBOL_INIT(…) /******************************************************************************* * * FUNCTION: acpi_get_table_header * * PARAMETERS: signature - ACPI signature of needed table * instance - Which instance (for SSDTs) * out_table_header - The pointer to the where the table header * is returned * * RETURN: Status and a copy of the table header * * DESCRIPTION: Finds and returns an ACPI table header. Caller provides the * memory where a copy of the header is to be returned * (fixed length). * ******************************************************************************/ acpi_status acpi_get_table_header(char *signature, u32 instance, struct acpi_table_header *out_table_header) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_get_table * * PARAMETERS: signature - ACPI signature of needed table * instance - Which instance (for SSDTs) * out_table - Where the pointer to the table is returned * * RETURN: Status and pointer to the requested table * * DESCRIPTION: Finds and verifies an ACPI table. Table must be in the * RSDT/XSDT. * Note that an early stage acpi_get_table() call must be paired * with an early stage acpi_put_table() call. otherwise the table * pointer mapped by the early stage mapping implementation may be * erroneously unmapped by the late stage unmapping implementation * in an acpi_put_table() invoked during the late stage. * ******************************************************************************/ acpi_status acpi_get_table(char *signature, u32 instance, struct acpi_table_header ** out_table) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_put_table * * PARAMETERS: table - The pointer to the table * * RETURN: None * * DESCRIPTION: Release a table returned by acpi_get_table() and its clones. * Note that it is not safe if this function was invoked after an * uninstallation happened to the original table descriptor. * Currently there is no OSPMs' requirement to handle such * situations. * ******************************************************************************/ void acpi_put_table(struct acpi_table_header *table) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_get_table_by_index * * PARAMETERS: table_index - Table index * out_table - Where the pointer to the table is returned * * RETURN: Status and pointer to the requested table * * DESCRIPTION: Obtain a table by an index into the global table list. Used * internally also. * ******************************************************************************/ acpi_status acpi_get_table_by_index(u32 table_index, struct acpi_table_header **out_table) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_install_table_handler * * PARAMETERS: handler - Table event handler * context - Value passed to the handler on each event * * RETURN: Status * * DESCRIPTION: Install a global table event handler. * ******************************************************************************/ acpi_status acpi_install_table_handler(acpi_table_handler handler, void *context) { … } ACPI_EXPORT_SYMBOL(…) /******************************************************************************* * * FUNCTION: acpi_remove_table_handler * * PARAMETERS: handler - Table event handler that was installed * previously. * * RETURN: Status * * DESCRIPTION: Remove a table event handler * ******************************************************************************/ acpi_status acpi_remove_table_handler(acpi_table_handler handler) { … } ACPI_EXPORT_SYMBOL(…)
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