linux/drivers/acpi/tables/tbxface.c
Bob Moore b8e4d89357 [ACPI] ACPICA 20060127
Implemented support in the Resource Manager to allow
unresolved namestring references within resource package
objects for the _PRT method. This support is in addition
to the previously implemented unresolved reference
support within the AML parser. If the interpreter slack
mode is enabled (true on Linux unless acpi=strict),
these unresolved references will be passed through
to the caller as a NULL package entry.
http://bugzilla.kernel.org/show_bug.cgi?id=5741

Implemented and deployed new macros and functions for
error and warning messages across the subsystem. These
macros are simpler and generate less code than their
predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_*
macros.

Implemented the acpi_cpu_flags type to simplify host OS
integration of the Acquire/Release Lock OSL interfaces.
Suggested by Steven Rostedt and Andrew Morton.

Fixed a problem where Alias ASL operators are sometimes
not correctly resolved. causing AE_AML_INTERNAL
http://bugzilla.kernel.org/show_bug.cgi?id=5189
http://bugzilla.kernel.org/show_bug.cgi?id=5674

Fixed several problems with the implementation of the
ConcatenateResTemplate ASL operator. As per the ACPI
specification, zero length buffers are now treated as a
single EndTag. One-length buffers always cause a fatal
exception. Non-zero length buffers that do not end with
a full 2-byte EndTag cause a fatal exception.

Fixed a possible structure overwrite in the
AcpiGetObjectInfo external interface. (With assistance
from Thomas Renninger)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-01-31 03:25:09 -05:00

420 lines
12 KiB
C

/******************************************************************************
*
* Module Name: tbxface - Public interfaces to the ACPI subsystem
* ACPI table oriented interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2006, 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/acnamesp.h>
#include <acpi/actables.h>
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME("tbxface")
/*******************************************************************************
*
* FUNCTION: acpi_load_tables
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: This function is called to load the ACPI tables from the
* provided RSDT
*
******************************************************************************/
acpi_status acpi_load_tables(void)
{
struct acpi_pointer rsdp_address;
acpi_status status;
ACPI_FUNCTION_TRACE("acpi_load_tables");
/* Get the RSDP */
status = acpi_os_get_root_pointer(ACPI_LOGICAL_ADDRESSING,
&rsdp_address);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Could not get the RSDP"));
goto error_exit;
}
/* Map and validate the RSDP */
acpi_gbl_table_flags = rsdp_address.pointer_type;
status = acpi_tb_verify_rsdp(&rsdp_address);
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "During RSDP validation"));
goto error_exit;
}
/* Get the RSDT via the RSDP */
status = acpi_tb_get_table_rsdt();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Could not load RSDT"));
goto error_exit;
}
/* Now get the tables needed by this subsystem (FADT, DSDT, etc.) */
status = acpi_tb_get_required_tables();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status,
"Could not get all required tables (DSDT/FADT/FACS)"));
goto error_exit;
}
ACPI_DEBUG_PRINT((ACPI_DB_INIT, "ACPI Tables successfully acquired\n"));
/* Load the namespace from the tables */
status = acpi_ns_load_namespace();
if (ACPI_FAILURE(status)) {
ACPI_EXCEPTION((AE_INFO, status, "Could not load namespace"));
goto error_exit;
}
return_ACPI_STATUS(AE_OK);
error_exit:
ACPI_EXCEPTION((AE_INFO, status, "Could not load tables"));
return_ACPI_STATUS(status);
}
#ifdef ACPI_FUTURE_USAGE
/*******************************************************************************
*
* FUNCTION: acpi_load_table
*
* PARAMETERS: table_ptr - pointer to a buffer containing the entire
* table to be loaded
*
* RETURN: Status
*
* DESCRIPTION: This function is called to load a table from the caller's
* buffer. The buffer must contain an entire ACPI Table including
* a valid header. The header fields will be verified, and if it
* is determined that the table is invalid, the call will fail.
*
******************************************************************************/
acpi_status acpi_load_table(struct acpi_table_header *table_ptr)
{
acpi_status status;
struct acpi_table_desc table_info;
struct acpi_pointer address;
ACPI_FUNCTION_TRACE("acpi_load_table");
if (!table_ptr) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Copy the table to a local buffer */
address.pointer_type = ACPI_LOGICAL_POINTER | ACPI_LOGICAL_ADDRESSING;
address.pointer.logical = table_ptr;
status = acpi_tb_get_table_body(&address, table_ptr, &table_info);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Check signature for a valid table type */
status = acpi_tb_recognize_table(&table_info, ACPI_TABLE_ALL);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Install the new table into the local data structures */
status = acpi_tb_install_table(&table_info);
if (ACPI_FAILURE(status)) {
if (status == AE_ALREADY_EXISTS) {
/* Table already exists, no error */
status = AE_OK;
}
/* Free table allocated by acpi_tb_get_table_body */
acpi_tb_delete_single_table(&table_info);
return_ACPI_STATUS(status);
}
/* Convert the table to common format if necessary */
switch (table_info.type) {
case ACPI_TABLE_FADT:
status = acpi_tb_convert_table_fadt();
break;
case ACPI_TABLE_FACS:
status = acpi_tb_build_common_facs(&table_info);
break;
default:
/* Load table into namespace if it contains executable AML */
status =
acpi_ns_load_table(table_info.installed_desc,
acpi_gbl_root_node);
break;
}
if (ACPI_FAILURE(status)) {
/* Uninstall table and free the buffer */
(void)acpi_tb_uninstall_table(table_info.installed_desc);
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_unload_table
*
* PARAMETERS: table_type - Type of table to be unloaded
*
* RETURN: Status
*
* DESCRIPTION: This routine is used to force the unload of a table
*
******************************************************************************/
acpi_status acpi_unload_table(acpi_table_type table_type)
{
struct acpi_table_desc *table_desc;
ACPI_FUNCTION_TRACE("acpi_unload_table");
/* Parameter validation */
if (table_type > ACPI_TABLE_MAX) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Find all tables of the requested type */
table_desc = acpi_gbl_table_lists[table_type].next;
while (table_desc) {
/*
* Delete all namespace entries owned by this table. Note that these
* entries can appear anywhere in the namespace by virtue of the AML
* "Scope" operator. Thus, we need to track ownership by an ID, not
* simply a position within the hierarchy
*/
acpi_ns_delete_namespace_by_owner(table_desc->owner_id);
acpi_ut_release_owner_id(&table_desc->owner_id);
table_desc = table_desc->next;
}
/* Delete (or unmap) all tables of this type */
acpi_tb_delete_tables_by_type(table_type);
return_ACPI_STATUS(AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_get_table_header
*
* PARAMETERS: table_type - one of the defined table types
* Instance - the non zero instance of the table, allows
* support for multiple tables of the same type
* see acpi_gbl_acpi_table_flag
* out_table_header - pointer to the struct acpi_table_header if successful
*
* DESCRIPTION: This function is called to get an ACPI table header. The caller
* supplies an pointer to a data area sufficient to contain an ACPI
* struct acpi_table_header structure.
*
* The header contains a length field that can be used to determine
* the size of the buffer needed to contain the entire table. This
* function is not valid for the RSD PTR table since it does not
* have a standard header and is fixed length.
*
******************************************************************************/
acpi_status
acpi_get_table_header(acpi_table_type table_type,
u32 instance, struct acpi_table_header *out_table_header)
{
struct acpi_table_header *tbl_ptr;
acpi_status status;
ACPI_FUNCTION_TRACE("acpi_get_table_header");
if ((instance == 0) ||
(table_type == ACPI_TABLE_RSDP) || (!out_table_header)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Check the table type and instance */
if ((table_type > ACPI_TABLE_MAX) ||
(ACPI_IS_SINGLE_TABLE(acpi_gbl_table_data[table_type].flags) &&
instance > 1)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get a pointer to the entire table */
status = acpi_tb_get_table_ptr(table_type, instance, &tbl_ptr);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* The function will return a NULL pointer if the table is not loaded */
if (tbl_ptr == NULL) {
return_ACPI_STATUS(AE_NOT_EXIST);
}
/* Copy the header to the caller's buffer */
ACPI_MEMCPY((void *)out_table_header, (void *)tbl_ptr,
sizeof(struct acpi_table_header));
return_ACPI_STATUS(status);
}
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_get_table
*
* PARAMETERS: table_type - one of the defined table types
* Instance - the non zero instance of the table, allows
* support for multiple tables of the same type
* see acpi_gbl_acpi_table_flag
* ret_buffer - pointer to a structure containing a buffer to
* receive the table
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get an ACPI table. The caller
* supplies an out_buffer large enough to contain the entire ACPI
* table. The caller should call the acpi_get_table_header function
* first to determine the buffer size needed. Upon completion
* the out_buffer->Length field will indicate the number of bytes
* copied into the out_buffer->buf_ptr buffer. This table will be
* a complete table including the header.
*
******************************************************************************/
acpi_status
acpi_get_table(acpi_table_type table_type,
u32 instance, struct acpi_buffer *ret_buffer)
{
struct acpi_table_header *tbl_ptr;
acpi_status status;
acpi_size table_length;
ACPI_FUNCTION_TRACE("acpi_get_table");
/* Parameter validation */
if (instance == 0) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
status = acpi_ut_validate_buffer(ret_buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Check the table type and instance */
if ((table_type > ACPI_TABLE_MAX) ||
(ACPI_IS_SINGLE_TABLE(acpi_gbl_table_data[table_type].flags) &&
instance > 1)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Get a pointer to the entire table */
status = acpi_tb_get_table_ptr(table_type, instance, &tbl_ptr);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* acpi_tb_get_table_ptr will return a NULL pointer if the
* table is not loaded.
*/
if (tbl_ptr == NULL) {
return_ACPI_STATUS(AE_NOT_EXIST);
}
/* Get the table length */
if (table_type == ACPI_TABLE_RSDP) {
/* RSD PTR is the only "table" without a header */
table_length = sizeof(struct rsdp_descriptor);
} else {
table_length = (acpi_size) tbl_ptr->length;
}
/* Validate/Allocate/Clear caller buffer */
status = acpi_ut_initialize_buffer(ret_buffer, table_length);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Copy the table to the buffer */
ACPI_MEMCPY((void *)ret_buffer->pointer, (void *)tbl_ptr, table_length);
return_ACPI_STATUS(AE_OK);
}
EXPORT_SYMBOL(acpi_get_table);