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Diffstat (limited to 'drivers/acpi/utilities/utxface.c')
| -rw-r--r-- | drivers/acpi/utilities/utxface.c | 525 |
1 files changed, 525 insertions, 0 deletions
diff --git a/drivers/acpi/utilities/utxface.c b/drivers/acpi/utilities/utxface.c new file mode 100644 index 00000000000..97a91f3f06f --- /dev/null +++ b/drivers/acpi/utilities/utxface.c @@ -0,0 +1,525 @@ +/****************************************************************************** + * + * Module Name: utxface - External interfaces for "global" ACPI functions + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2005, R. Byron Moore + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <linux/module.h> + +#include <acpi/acpi.h> +#include <acpi/acevents.h> +#include <acpi/acnamesp.h> +#include <acpi/acparser.h> +#include <acpi/acdispat.h> +#include <acpi/acdebug.h> + +#define _COMPONENT ACPI_UTILITIES + ACPI_MODULE_NAME ("utxface") + + +/******************************************************************************* + * + * FUNCTION: acpi_initialize_subsystem + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Initializes all global variables. This is the first function + * called, so any early initialization belongs here. + * + ******************************************************************************/ + +acpi_status +acpi_initialize_subsystem ( + void) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE ("acpi_initialize_subsystem"); + + + ACPI_DEBUG_EXEC (acpi_ut_init_stack_ptr_trace ()); + + + /* Initialize all globals used by the subsystem */ + + acpi_ut_init_globals (); + + /* Initialize the OS-Dependent layer */ + + status = acpi_os_initialize (); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (("OSD failed to initialize, %s\n", + acpi_format_exception (status))); + return_ACPI_STATUS (status); + } + + /* Create the default mutex objects */ + + status = acpi_ut_mutex_initialize (); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (("Global mutex creation failure, %s\n", + acpi_format_exception (status))); + return_ACPI_STATUS (status); + } + + /* + * Initialize the namespace manager and + * the root of the namespace tree + */ + + status = acpi_ns_root_initialize (); + if (ACPI_FAILURE (status)) { + ACPI_REPORT_ERROR (("Namespace initialization failure, %s\n", + acpi_format_exception (status))); + return_ACPI_STATUS (status); + } + + + /* If configured, initialize the AML debugger */ + + ACPI_DEBUGGER_EXEC (status = acpi_db_initialize ()); + + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_enable_subsystem + * + * PARAMETERS: Flags - Init/enable Options + * + * RETURN: Status + * + * DESCRIPTION: Completes the subsystem initialization including hardware. + * Puts system into ACPI mode if it isn't already. + * + ******************************************************************************/ + +acpi_status +acpi_enable_subsystem ( + u32 flags) +{ + acpi_status status = AE_OK; + + + ACPI_FUNCTION_TRACE ("acpi_enable_subsystem"); + + + /* + * We must initialize the hardware before we can enable ACPI. + * The values from the FADT are validated here. + */ + if (!(flags & ACPI_NO_HARDWARE_INIT)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI hardware\n")); + + status = acpi_hw_initialize (); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* Enable ACPI mode */ + + if (!(flags & ACPI_NO_ACPI_ENABLE)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Going into ACPI mode\n")); + + acpi_gbl_original_mode = acpi_hw_get_mode(); + + status = acpi_enable (); + if (ACPI_FAILURE (status)) { + ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "acpi_enable failed.\n")); + return_ACPI_STATUS (status); + } + } + + /* + * Install the default op_region handlers. These are installed unless + * other handlers have already been installed via the + * install_address_space_handler interface. + */ + if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Installing default address space handlers\n")); + + status = acpi_ev_install_region_handlers (); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* + * Initialize ACPI Event handling (Fixed and General Purpose) + * + * NOTE: We must have the hardware AND events initialized before we can execute + * ANY control methods SAFELY. Any control method can require ACPI hardware + * support, so the hardware MUST be initialized before execution! + */ + if (!(flags & ACPI_NO_EVENT_INIT)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI events\n")); + + status = acpi_ev_initialize_events (); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* Install the SCI handler and Global Lock handler */ + + if (!(flags & ACPI_NO_HANDLER_INIT)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Installing SCI/GL handlers\n")); + + status = acpi_ev_install_xrupt_handlers (); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + return_ACPI_STATUS (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_initialize_objects + * + * PARAMETERS: Flags - Init/enable Options + * + * RETURN: Status + * + * DESCRIPTION: Completes namespace initialization by initializing device + * objects and executing AML code for Regions, buffers, etc. + * + ******************************************************************************/ + +acpi_status +acpi_initialize_objects ( + u32 flags) +{ + acpi_status status = AE_OK; + + + ACPI_FUNCTION_TRACE ("acpi_initialize_objects"); + + + /* + * Run all _REG methods + * + * NOTE: Any objects accessed + * by the _REG methods will be automatically initialized, even if they + * contain executable AML (see call to acpi_ns_initialize_objects below). + */ + if (!(flags & ACPI_NO_ADDRESS_SPACE_INIT)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Executing _REG op_region methods\n")); + + status = acpi_ev_initialize_op_regions (); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* + * Initialize the objects that remain uninitialized. This + * runs the executable AML that may be part of the declaration of these + * objects: operation_regions, buffer_fields, Buffers, and Packages. + */ + if (!(flags & ACPI_NO_OBJECT_INIT)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Completing Initialization of ACPI Objects\n")); + + status = acpi_ns_initialize_objects (); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* + * Initialize all device objects in the namespace + * This runs the _STA and _INI methods. + */ + if (!(flags & ACPI_NO_DEVICE_INIT)) { + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[Init] Initializing ACPI Devices\n")); + + status = acpi_ns_initialize_devices (); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* + * Empty the caches (delete the cached objects) on the assumption that + * the table load filled them up more than they will be at runtime -- + * thus wasting non-paged memory. + */ + status = acpi_purge_cached_objects (); + + acpi_gbl_startup_flags |= ACPI_INITIALIZED_OK; + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_terminate + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Shutdown the ACPI subsystem. Release all resources. + * + ******************************************************************************/ + +acpi_status +acpi_terminate (void) +{ + acpi_status status; + + + ACPI_FUNCTION_TRACE ("acpi_terminate"); + + + /* Terminate the AML Debugger if present */ + + ACPI_DEBUGGER_EXEC(acpi_gbl_db_terminate_threads = TRUE); + + /* Shutdown and free all resources */ + + acpi_ut_subsystem_shutdown (); + + + /* Free the mutex objects */ + + acpi_ut_mutex_terminate (); + + +#ifdef ACPI_DEBUGGER + + /* Shut down the debugger */ + + acpi_db_terminate (); +#endif + + /* Now we can shutdown the OS-dependent layer */ + + status = acpi_os_terminate (); + return_ACPI_STATUS (status); +} + + +#ifdef ACPI_FUTURE_USAGE + +/***************************************************************************** + * + * FUNCTION: acpi_subsystem_status + * + * PARAMETERS: None + * + * RETURN: Status of the ACPI subsystem + * + * DESCRIPTION: Other drivers that use the ACPI subsystem should call this + * before making any other calls, to ensure the subsystem initial- + * ized successfully. + * + ****************************************************************************/ + +acpi_status +acpi_subsystem_status (void) +{ + if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) { + return (AE_OK); + } + else { + return (AE_ERROR); + } +} + + +/****************************************************************************** + * + * FUNCTION: acpi_get_system_info + * + * PARAMETERS: out_buffer - a pointer to a buffer to receive the + * resources for the device + * buffer_length - the number of bytes available in the buffer + * + * RETURN: Status - the status of the call + * + * DESCRIPTION: This function is called to get information about the current + * state of the ACPI subsystem. It will return system information + * in the out_buffer. + * + * If the function fails an appropriate status will be returned + * and the value of out_buffer is undefined. + * + ******************************************************************************/ + +acpi_status +acpi_get_system_info ( + struct acpi_buffer *out_buffer) +{ + struct acpi_system_info *info_ptr; + u32 i; + acpi_status status; + + + ACPI_FUNCTION_TRACE ("acpi_get_system_info"); + + + /* Parameter validation */ + + status = acpi_ut_validate_buffer (out_buffer); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Validate/Allocate/Clear caller buffer */ + + status = acpi_ut_initialize_buffer (out_buffer, sizeof (struct acpi_system_info)); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* + * Populate the return buffer + */ + info_ptr = (struct acpi_system_info *) out_buffer->pointer; + + info_ptr->acpi_ca_version = ACPI_CA_VERSION; + + /* System flags (ACPI capabilities) */ + + info_ptr->flags = ACPI_SYS_MODE_ACPI; + + /* Timer resolution - 24 or 32 bits */ + + if (!acpi_gbl_FADT) { + info_ptr->timer_resolution = 0; + } + else if (acpi_gbl_FADT->tmr_val_ext == 0) { + info_ptr->timer_resolution = 24; + } + else { + info_ptr->timer_resolution = 32; + } + + /* Clear the reserved fields */ + + info_ptr->reserved1 = 0; + info_ptr->reserved2 = 0; + + /* Current debug levels */ + + info_ptr->debug_layer = acpi_dbg_layer; + info_ptr->debug_level = acpi_dbg_level; + + /* Current status of the ACPI tables, per table type */ + + info_ptr->num_table_types = NUM_ACPI_TABLE_TYPES; + for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) { + info_ptr->table_info[i].count = acpi_gbl_table_lists[i].count; + } + + return_ACPI_STATUS (AE_OK); +} +EXPORT_SYMBOL(acpi_get_system_info); + + +/***************************************************************************** + * + * FUNCTION: acpi_install_initialization_handler + * + * PARAMETERS: Handler - Callback procedure + * + * RETURN: Status + * + * DESCRIPTION: Install an initialization handler + * + * TBD: When a second function is added, must save the Function also. + * + ****************************************************************************/ + +acpi_status +acpi_install_initialization_handler ( + acpi_init_handler handler, + u32 function) +{ + + if (!handler) { + return (AE_BAD_PARAMETER); + } + + if (acpi_gbl_init_handler) { + return (AE_ALREADY_EXISTS); + } + + acpi_gbl_init_handler = handler; + return AE_OK; +} + +#endif /* ACPI_FUTURE_USAGE */ + + +/***************************************************************************** + * + * FUNCTION: acpi_purge_cached_objects + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Empty all caches (delete the cached objects) + * + ****************************************************************************/ + +acpi_status +acpi_purge_cached_objects (void) +{ + ACPI_FUNCTION_TRACE ("acpi_purge_cached_objects"); + + +#ifdef ACPI_ENABLE_OBJECT_CACHE + acpi_ut_delete_generic_state_cache (); + acpi_ut_delete_object_cache (); + acpi_ds_delete_walk_state_cache (); + acpi_ps_delete_parse_cache (); +#endif + + return_ACPI_STATUS (AE_OK); +} |