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357 lines
8.7 KiB
357 lines
8.7 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: utalloc - local memory allocation routines |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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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 "acdebug.h" |
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#define _COMPONENT ACPI_UTILITIES |
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ACPI_MODULE_NAME("utalloc") |
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#if !defined (USE_NATIVE_ALLOCATE_ZEROED) |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_os_allocate_zeroed |
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* |
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* PARAMETERS: size - Size of the allocation |
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* |
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* RETURN: Address of the allocated memory on success, NULL on failure. |
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* |
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* DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory. |
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* This is the default implementation. Can be overridden via the |
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* USE_NATIVE_ALLOCATE_ZEROED flag. |
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* |
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******************************************************************************/ |
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void *acpi_os_allocate_zeroed(acpi_size size) |
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{ |
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void *allocation; |
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ACPI_FUNCTION_ENTRY(); |
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allocation = acpi_os_allocate(size); |
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if (allocation) { |
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/* Clear the memory block */ |
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memset(allocation, 0, size); |
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} |
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return (allocation); |
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} |
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#endif /* !USE_NATIVE_ALLOCATE_ZEROED */ |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ut_create_caches |
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* |
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* PARAMETERS: None |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Create all local caches |
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* |
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******************************************************************************/ |
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acpi_status acpi_ut_create_caches(void) |
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{ |
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acpi_status status; |
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/* Object Caches, for frequently used objects */ |
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status = |
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acpi_os_create_cache("Acpi-Namespace", |
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sizeof(struct acpi_namespace_node), |
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ACPI_MAX_NAMESPACE_CACHE_DEPTH, |
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&acpi_gbl_namespace_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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status = |
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acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state), |
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ACPI_MAX_STATE_CACHE_DEPTH, |
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&acpi_gbl_state_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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status = |
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acpi_os_create_cache("Acpi-Parse", |
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sizeof(struct acpi_parse_obj_common), |
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ACPI_MAX_PARSE_CACHE_DEPTH, |
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&acpi_gbl_ps_node_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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status = |
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acpi_os_create_cache("Acpi-ParseExt", |
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sizeof(struct acpi_parse_obj_named), |
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ACPI_MAX_EXTPARSE_CACHE_DEPTH, |
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&acpi_gbl_ps_node_ext_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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status = |
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acpi_os_create_cache("Acpi-Operand", |
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sizeof(union acpi_operand_object), |
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ACPI_MAX_OBJECT_CACHE_DEPTH, |
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&acpi_gbl_operand_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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#ifdef ACPI_ASL_COMPILER |
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/* |
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* For use with the ASL-/ASL+ option. This cache keeps track of regular |
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* 0xA9 0x01 comments. |
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*/ |
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status = |
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acpi_os_create_cache("Acpi-Comment", |
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sizeof(struct acpi_comment_node), |
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ACPI_MAX_COMMENT_CACHE_DEPTH, |
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&acpi_gbl_reg_comment_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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/* |
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* This cache keeps track of the starting addresses of where the comments |
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* lie. This helps prevent duplication of comments. |
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*/ |
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status = |
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acpi_os_create_cache("Acpi-Comment-Addr", |
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sizeof(struct acpi_comment_addr_node), |
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ACPI_MAX_COMMENT_CACHE_DEPTH, |
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&acpi_gbl_comment_addr_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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/* |
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* This cache will be used for nodes that represent files. |
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*/ |
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status = |
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acpi_os_create_cache("Acpi-File", sizeof(struct acpi_file_node), |
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ACPI_MAX_COMMENT_CACHE_DEPTH, |
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&acpi_gbl_file_cache); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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#endif |
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS |
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/* Memory allocation lists */ |
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status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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status = |
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acpi_ut_create_list("Acpi-Namespace", |
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sizeof(struct acpi_namespace_node), |
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&acpi_gbl_ns_node_list); |
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if (ACPI_FAILURE(status)) { |
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return (status); |
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} |
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#endif |
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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_delete_caches |
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* |
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* PARAMETERS: None |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Purge and delete all local caches |
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* |
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******************************************************************************/ |
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acpi_status acpi_ut_delete_caches(void) |
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{ |
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS |
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char buffer[7]; |
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if (acpi_gbl_display_final_mem_stats) { |
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strcpy(buffer, "MEMORY"); |
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(void)acpi_db_display_statistics(buffer); |
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} |
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#endif |
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(void)acpi_os_delete_cache(acpi_gbl_namespace_cache); |
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acpi_gbl_namespace_cache = NULL; |
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(void)acpi_os_delete_cache(acpi_gbl_state_cache); |
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acpi_gbl_state_cache = NULL; |
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(void)acpi_os_delete_cache(acpi_gbl_operand_cache); |
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acpi_gbl_operand_cache = NULL; |
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(void)acpi_os_delete_cache(acpi_gbl_ps_node_cache); |
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acpi_gbl_ps_node_cache = NULL; |
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(void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache); |
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acpi_gbl_ps_node_ext_cache = NULL; |
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#ifdef ACPI_ASL_COMPILER |
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(void)acpi_os_delete_cache(acpi_gbl_reg_comment_cache); |
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acpi_gbl_reg_comment_cache = NULL; |
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(void)acpi_os_delete_cache(acpi_gbl_comment_addr_cache); |
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acpi_gbl_comment_addr_cache = NULL; |
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(void)acpi_os_delete_cache(acpi_gbl_file_cache); |
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acpi_gbl_file_cache = NULL; |
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#endif |
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#ifdef ACPI_DBG_TRACK_ALLOCATIONS |
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/* Debug only - display leftover memory allocation, if any */ |
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acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL); |
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/* Free memory lists */ |
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acpi_os_free(acpi_gbl_global_list); |
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acpi_gbl_global_list = NULL; |
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acpi_os_free(acpi_gbl_ns_node_list); |
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acpi_gbl_ns_node_list = NULL; |
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#endif |
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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_validate_buffer |
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* |
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* PARAMETERS: buffer - Buffer descriptor to be validated |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer |
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* |
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******************************************************************************/ |
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acpi_status acpi_ut_validate_buffer(struct acpi_buffer *buffer) |
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{ |
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/* Obviously, the structure pointer must be valid */ |
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if (!buffer) { |
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return (AE_BAD_PARAMETER); |
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} |
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/* Special semantics for the length */ |
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if ((buffer->length == ACPI_NO_BUFFER) || |
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(buffer->length == ACPI_ALLOCATE_BUFFER) || |
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(buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) { |
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return (AE_OK); |
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} |
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/* Length is valid, the buffer pointer must be also */ |
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if (!buffer->pointer) { |
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return (AE_BAD_PARAMETER); |
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} |
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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_initialize_buffer |
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* |
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* PARAMETERS: buffer - Buffer to be validated |
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* required_length - Length needed |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Validate that the buffer is of the required length or |
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* allocate a new buffer. Returned buffer is always zeroed. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ut_initialize_buffer(struct acpi_buffer *buffer, acpi_size required_length) |
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{ |
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acpi_size input_buffer_length; |
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/* Parameter validation */ |
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if (!buffer || !required_length) { |
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return (AE_BAD_PARAMETER); |
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} |
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/* |
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* Buffer->Length is used as both an input and output parameter. Get the |
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* input actual length and set the output required buffer length. |
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*/ |
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input_buffer_length = buffer->length; |
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buffer->length = required_length; |
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/* |
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* The input buffer length contains the actual buffer length, or the type |
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* of buffer to be allocated by this routine. |
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*/ |
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switch (input_buffer_length) { |
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case ACPI_NO_BUFFER: |
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/* Return the exception (and the required buffer length) */ |
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return (AE_BUFFER_OVERFLOW); |
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case ACPI_ALLOCATE_BUFFER: |
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/* |
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* Allocate a new buffer. We directectly call acpi_os_allocate here to |
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* purposefully bypass the (optionally enabled) internal allocation |
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* tracking mechanism since we only want to track internal |
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* allocations. Note: The caller should use acpi_os_free to free this |
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* buffer created via ACPI_ALLOCATE_BUFFER. |
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*/ |
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buffer->pointer = acpi_os_allocate(required_length); |
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break; |
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case ACPI_ALLOCATE_LOCAL_BUFFER: |
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/* Allocate a new buffer with local interface to allow tracking */ |
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buffer->pointer = ACPI_ALLOCATE(required_length); |
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break; |
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default: |
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/* Existing buffer: Validate the size of the buffer */ |
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if (input_buffer_length < required_length) { |
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return (AE_BUFFER_OVERFLOW); |
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} |
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break; |
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} |
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/* Validate allocation from above or input buffer pointer */ |
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if (!buffer->pointer) { |
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return (AE_NO_MEMORY); |
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} |
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/* Have a valid buffer, clear it */ |
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memset(buffer->pointer, 0, required_length); |
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return (AE_OK); |
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}
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