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-rw-r--r--libacpica/utalloc.c357
1 files changed, 357 insertions, 0 deletions
diff --git a/libacpica/utalloc.c b/libacpica/utalloc.c
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+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: utalloc - local memory allocation routines
+ *
+ * Copyright (C) 2000 - 2021, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acdebug.h"
+
+#define _COMPONENT ACPI_UTILITIES
+ACPI_MODULE_NAME("utalloc")
+#if !defined (USE_NATIVE_ALLOCATE_ZEROED)
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_os_allocate_zeroed
+ *
+ * PARAMETERS: size - Size of the allocation
+ *
+ * RETURN: Address of the allocated memory on success, NULL on failure.
+ *
+ * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.
+ * This is the default implementation. Can be overridden via the
+ * USE_NATIVE_ALLOCATE_ZEROED flag.
+ *
+ ******************************************************************************/
+void *acpi_os_allocate_zeroed(acpi_size size)
+{
+ void *allocation;
+
+ ACPI_FUNCTION_ENTRY();
+
+ allocation = acpi_os_allocate(size);
+ if (allocation) {
+
+ /* Clear the memory block */
+
+ memset(allocation, 0, size);
+ }
+
+ return (allocation);
+}
+
+#endif /* !USE_NATIVE_ALLOCATE_ZEROED */
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_create_caches
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Create all local caches
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ut_create_caches(void)
+{
+ acpi_status status;
+
+ /* Object Caches, for frequently used objects */
+
+ status =
+ acpi_os_create_cache("Acpi-Namespace",
+ sizeof(struct acpi_namespace_node),
+ ACPI_MAX_NAMESPACE_CACHE_DEPTH,
+ &acpi_gbl_namespace_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ status =
+ acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state),
+ ACPI_MAX_STATE_CACHE_DEPTH,
+ &acpi_gbl_state_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ status =
+ acpi_os_create_cache("Acpi-Parse",
+ sizeof(struct acpi_parse_obj_common),
+ ACPI_MAX_PARSE_CACHE_DEPTH,
+ &acpi_gbl_ps_node_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ status =
+ acpi_os_create_cache("Acpi-ParseExt",
+ sizeof(struct acpi_parse_obj_named),
+ ACPI_MAX_EXTPARSE_CACHE_DEPTH,
+ &acpi_gbl_ps_node_ext_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ status =
+ acpi_os_create_cache("Acpi-Operand",
+ sizeof(union acpi_operand_object),
+ ACPI_MAX_OBJECT_CACHE_DEPTH,
+ &acpi_gbl_operand_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+#ifdef ACPI_ASL_COMPILER
+ /*
+ * For use with the ASL-/ASL+ option. This cache keeps track of regular
+ * 0xA9 0x01 comments.
+ */
+ status =
+ acpi_os_create_cache("Acpi-Comment",
+ sizeof(struct acpi_comment_node),
+ ACPI_MAX_COMMENT_CACHE_DEPTH,
+ &acpi_gbl_reg_comment_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /*
+ * This cache keeps track of the starting addresses of where the comments
+ * lie. This helps prevent duplication of comments.
+ */
+ status =
+ acpi_os_create_cache("Acpi-Comment-Addr",
+ sizeof(struct acpi_comment_addr_node),
+ ACPI_MAX_COMMENT_CACHE_DEPTH,
+ &acpi_gbl_comment_addr_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /*
+ * This cache will be used for nodes that represent files.
+ */
+ status =
+ acpi_os_create_cache("Acpi-File", sizeof(struct acpi_file_node),
+ ACPI_MAX_COMMENT_CACHE_DEPTH,
+ &acpi_gbl_file_cache);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+#endif
+
+#ifdef ACPI_DBG_TRACK_ALLOCATIONS
+
+ /* Memory allocation lists */
+
+ status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ status =
+ acpi_ut_create_list("Acpi-Namespace",
+ sizeof(struct acpi_namespace_node),
+ &acpi_gbl_ns_node_list);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+#endif
+
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_delete_caches
+ *
+ * PARAMETERS: None
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Purge and delete all local caches
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ut_delete_caches(void)
+{
+#ifdef ACPI_DBG_TRACK_ALLOCATIONS
+ char buffer[7];
+
+ if (acpi_gbl_display_final_mem_stats) {
+ strcpy(buffer, "MEMORY");
+ (void)acpi_db_display_statistics(buffer);
+ }
+#endif
+
+ (void)acpi_os_delete_cache(acpi_gbl_namespace_cache);
+ acpi_gbl_namespace_cache = NULL;
+
+ (void)acpi_os_delete_cache(acpi_gbl_state_cache);
+ acpi_gbl_state_cache = NULL;
+
+ (void)acpi_os_delete_cache(acpi_gbl_operand_cache);
+ acpi_gbl_operand_cache = NULL;
+
+ (void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);
+ acpi_gbl_ps_node_cache = NULL;
+
+ (void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);
+ acpi_gbl_ps_node_ext_cache = NULL;
+
+#ifdef ACPI_ASL_COMPILER
+ (void)acpi_os_delete_cache(acpi_gbl_reg_comment_cache);
+ acpi_gbl_reg_comment_cache = NULL;
+
+ (void)acpi_os_delete_cache(acpi_gbl_comment_addr_cache);
+ acpi_gbl_comment_addr_cache = NULL;
+
+ (void)acpi_os_delete_cache(acpi_gbl_file_cache);
+ acpi_gbl_file_cache = NULL;
+#endif
+
+#ifdef ACPI_DBG_TRACK_ALLOCATIONS
+
+ /* Debug only - display leftover memory allocation, if any */
+
+ acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL);
+
+ /* Free memory lists */
+
+ acpi_os_free(acpi_gbl_global_list);
+ acpi_gbl_global_list = NULL;
+
+ acpi_os_free(acpi_gbl_ns_node_list);
+ acpi_gbl_ns_node_list = NULL;
+#endif
+
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_validate_buffer
+ *
+ * PARAMETERS: buffer - Buffer descriptor to be validated
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ut_validate_buffer(struct acpi_buffer *buffer)
+{
+
+ /* Obviously, the structure pointer must be valid */
+
+ if (!buffer) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ /* Special semantics for the length */
+
+ if ((buffer->length == ACPI_NO_BUFFER) ||
+ (buffer->length == ACPI_ALLOCATE_BUFFER) ||
+ (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {
+ return (AE_OK);
+ }
+
+ /* Length is valid, the buffer pointer must be also */
+
+ if (!buffer->pointer) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ut_initialize_buffer
+ *
+ * PARAMETERS: buffer - Buffer to be validated
+ * required_length - Length needed
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Validate that the buffer is of the required length or
+ * allocate a new buffer. Returned buffer is always zeroed.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_initialize_buffer(struct acpi_buffer *buffer, acpi_size required_length)
+{
+ acpi_size input_buffer_length;
+
+ /* Parameter validation */
+
+ if (!buffer || !required_length) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ /*
+ * Buffer->Length is used as both an input and output parameter. Get the
+ * input actual length and set the output required buffer length.
+ */
+ input_buffer_length = buffer->length;
+ buffer->length = required_length;
+
+ /*
+ * The input buffer length contains the actual buffer length, or the type
+ * of buffer to be allocated by this routine.
+ */
+ switch (input_buffer_length) {
+ case ACPI_NO_BUFFER:
+
+ /* Return the exception (and the required buffer length) */
+
+ return (AE_BUFFER_OVERFLOW);
+
+ case ACPI_ALLOCATE_BUFFER:
+ /*
+ * Allocate a new buffer. We directectly call acpi_os_allocate here to
+ * purposefully bypass the (optionally enabled) internal allocation
+ * tracking mechanism since we only want to track internal
+ * allocations. Note: The caller should use acpi_os_free to free this
+ * buffer created via ACPI_ALLOCATE_BUFFER.
+ */
+ buffer->pointer = acpi_os_allocate(required_length);
+ break;
+
+ case ACPI_ALLOCATE_LOCAL_BUFFER:
+
+ /* Allocate a new buffer with local interface to allow tracking */
+
+ buffer->pointer = ACPI_ALLOCATE(required_length);
+ break;
+
+ default:
+
+ /* Existing buffer: Validate the size of the buffer */
+
+ if (input_buffer_length < required_length) {
+ return (AE_BUFFER_OVERFLOW);
+ }
+ break;
+ }
+
+ /* Validate allocation from above or input buffer pointer */
+
+ if (!buffer->pointer) {
+ return (AE_NO_MEMORY);
+ }
+
+ /* Have a valid buffer, clear it */
+
+ memset(buffer->pointer, 0, required_length);
+ return (AE_OK);
+}
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