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linux-next/drivers/acpi/tables/tbinstal.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

565 lines
15 KiB
C

/******************************************************************************
*
* Module Name: tbinstal - ACPI table installation and removal
*
*****************************************************************************/
/*
* 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 <acpi/acpi.h>
#include <acpi/actables.h>
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbinstal")
/* Local prototypes */
static acpi_status
acpi_tb_match_signature (
char *signature,
struct acpi_table_desc *table_info,
u8 search_type);
/*******************************************************************************
*
* FUNCTION: acpi_tb_match_signature
*
* PARAMETERS: Signature - Table signature to match
* table_info - Return data
* search_type - Table type to match (primary/secondary)
*
* RETURN: Status
*
* DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned"
* tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match.
*
******************************************************************************/
static acpi_status
acpi_tb_match_signature (
char *signature,
struct acpi_table_desc *table_info,
u8 search_type)
{
acpi_native_uint i;
ACPI_FUNCTION_TRACE ("tb_match_signature");
/* Search for a signature match among the known table types */
for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
if (!(acpi_gbl_table_data[i].flags & search_type)) {
continue;
}
if (!ACPI_STRNCMP (signature, acpi_gbl_table_data[i].signature,
acpi_gbl_table_data[i].sig_length)) {
/* Found a signature match, return index if requested */
if (table_info) {
table_info->type = (u8) i;
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Table [%4.4s] is an ACPI table consumed by the core subsystem\n",
(char *) acpi_gbl_table_data[i].signature));
return_ACPI_STATUS (AE_OK);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n",
(char *) signature));
return_ACPI_STATUS (AE_TABLE_NOT_SUPPORTED);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_install_table
*
* PARAMETERS: table_info - Return value from acpi_tb_get_table_body
*
* RETURN: Status
*
* DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must
* already be loaded and validated.
* Install the table into the global data structs.
*
******************************************************************************/
acpi_status
acpi_tb_install_table (
struct acpi_table_desc *table_info)
{
acpi_status status;
ACPI_FUNCTION_TRACE ("tb_install_table");
/* Lock tables while installing */
status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n",
table_info->pointer->signature, acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
/* Install the table into the global data structure */
status = acpi_tb_init_table_descriptor (table_info->type, table_info);
if (ACPI_FAILURE (status)) {
ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n",
table_info->pointer->signature, acpi_format_exception (status)));
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n",
acpi_gbl_table_data[table_info->type].name, table_info->pointer));
(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_recognize_table
*
* PARAMETERS: table_info - Return value from acpi_tb_get_table_body
* search_type - Table type to match (primary/secondary)
*
* RETURN: Status
*
* DESCRIPTION: Check a table signature for a match against known table types
*
* NOTE: All table pointers are validated as follows:
* 1) Table pointer must point to valid physical memory
* 2) Signature must be 4 ASCII chars, even if we don't recognize the
* name
* 3) Table must be readable for length specified in the header
* 4) Table checksum must be valid (with the exception of the FACS
* which has no checksum for some odd reason)
*
******************************************************************************/
acpi_status
acpi_tb_recognize_table (
struct acpi_table_desc *table_info,
u8 search_type)
{
struct acpi_table_header *table_header;
acpi_status status;
ACPI_FUNCTION_TRACE ("tb_recognize_table");
/* Ensure that we have a valid table pointer */
table_header = (struct acpi_table_header *) table_info->pointer;
if (!table_header) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* We only "recognize" a limited number of ACPI tables -- namely, the
* ones that are used by the subsystem (DSDT, FADT, etc.)
*
* An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
* This can be any one of many valid ACPI tables, it just isn't one of
* the tables that is consumed by the core subsystem
*/
status = acpi_tb_match_signature (table_header->signature,
table_info, search_type);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
status = acpi_tb_validate_table_header (table_header);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Return the table type and length via the info struct */
table_info->length = (acpi_size) table_header->length;
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_init_table_descriptor
*
* PARAMETERS: table_type - The type of the table
* table_info - A table info struct
*
* RETURN: None.
*
* DESCRIPTION: Install a table into the global data structs.
*
******************************************************************************/
acpi_status
acpi_tb_init_table_descriptor (
acpi_table_type table_type,
struct acpi_table_desc *table_info)
{
struct acpi_table_list *list_head;
struct acpi_table_desc *table_desc;
ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type);
/* Allocate a descriptor for this table */
table_desc = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc));
if (!table_desc) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Install the table into the global data structure */
list_head = &acpi_gbl_table_lists[table_type];
/*
* Two major types of tables: 1) Only one instance is allowed. This
* includes most ACPI tables such as the DSDT. 2) Multiple instances of
* the table are allowed. This includes SSDT and PSDTs.
*/
if (ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags)) {
/*
* Only one table allowed, and a table has alread been installed
* at this location, so return an error.
*/
if (list_head->next) {
ACPI_MEM_FREE (table_desc);
return_ACPI_STATUS (AE_ALREADY_EXISTS);
}
table_desc->next = list_head->next;
list_head->next = table_desc;
if (table_desc->next) {
table_desc->next->prev = table_desc;
}
list_head->count++;
}
else {
/*
* Link the new table in to the list of tables of this type.
* Insert at the end of the list, order IS IMPORTANT.
*
* table_desc->Prev & Next are already NULL from calloc()
*/
list_head->count++;
if (!list_head->next) {
list_head->next = table_desc;
}
else {
table_desc->next = list_head->next;
while (table_desc->next->next) {
table_desc->next = table_desc->next->next;
}
table_desc->next->next = table_desc;
table_desc->prev = table_desc->next;
table_desc->next = NULL;
}
}
/* Finish initialization of the table descriptor */
table_desc->type = (u8) table_type;
table_desc->pointer = table_info->pointer;
table_desc->length = table_info->length;
table_desc->allocation = table_info->allocation;
table_desc->aml_start = (u8 *) (table_desc->pointer + 1),
table_desc->aml_length = (u32) (table_desc->length -
(u32) sizeof (struct acpi_table_header));
table_desc->table_id = acpi_ut_allocate_owner_id (
ACPI_OWNER_TYPE_TABLE);
table_desc->loaded_into_namespace = FALSE;
/*
* Set the appropriate global pointer (if there is one) to point to the
* newly installed table
*/
if (acpi_gbl_table_data[table_type].global_ptr) {
*(acpi_gbl_table_data[table_type].global_ptr) = table_info->pointer;
}
/* Return Data */
table_info->table_id = table_desc->table_id;
table_info->installed_desc = table_desc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_delete_all_tables
*
* PARAMETERS: None.
*
* RETURN: None.
*
* DESCRIPTION: Delete all internal ACPI tables
*
******************************************************************************/
void
acpi_tb_delete_all_tables (
void)
{
acpi_table_type type;
/*
* Free memory allocated for ACPI tables
* Memory can either be mapped or allocated
*/
for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) {
acpi_tb_delete_tables_by_type (type);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_delete_tables_by_type
*
* PARAMETERS: Type - The table type to be deleted
*
* RETURN: None.
*
* DESCRIPTION: Delete an internal ACPI table
* Locks the ACPI table mutex
*
******************************************************************************/
void
acpi_tb_delete_tables_by_type (
acpi_table_type type)
{
struct acpi_table_desc *table_desc;
u32 count;
u32 i;
ACPI_FUNCTION_TRACE_U32 ("tb_delete_tables_by_type", type);
if (type > ACPI_TABLE_MAX) {
return_VOID;
}
if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_TABLES))) {
return;
}
/* Clear the appropriate "typed" global table pointer */
switch (type) {
case ACPI_TABLE_RSDP:
acpi_gbl_RSDP = NULL;
break;
case ACPI_TABLE_DSDT:
acpi_gbl_DSDT = NULL;
break;
case ACPI_TABLE_FADT:
acpi_gbl_FADT = NULL;
break;
case ACPI_TABLE_FACS:
acpi_gbl_FACS = NULL;
break;
case ACPI_TABLE_XSDT:
acpi_gbl_XSDT = NULL;
break;
case ACPI_TABLE_SSDT:
case ACPI_TABLE_PSDT:
default:
break;
}
/*
* Free the table
* 1) Get the head of the list
*/
table_desc = acpi_gbl_table_lists[type].next;
count = acpi_gbl_table_lists[type].count;
/*
* 2) Walk the entire list, deleting both the allocated tables
* and the table descriptors
*/
for (i = 0; i < count; i++) {
table_desc = acpi_tb_uninstall_table (table_desc);
}
(void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_delete_single_table
*
* PARAMETERS: table_info - A table info struct
*
* RETURN: None.
*
* DESCRIPTION: Low-level free for a single ACPI table. Handles cases where
* the table was allocated a buffer or was mapped.
*
******************************************************************************/
void
acpi_tb_delete_single_table (
struct acpi_table_desc *table_desc)
{
/* Must have a valid table descriptor and pointer */
if ((!table_desc) ||
(!table_desc->pointer)) {
return;
}
/* Valid table, determine type of memory allocation */
switch (table_desc->allocation) {
case ACPI_MEM_NOT_ALLOCATED:
break;
case ACPI_MEM_ALLOCATED:
ACPI_MEM_FREE (table_desc->pointer);
break;
case ACPI_MEM_MAPPED:
acpi_os_unmap_memory (table_desc->pointer, table_desc->length);
break;
default:
break;
}
}
/*******************************************************************************
*
* FUNCTION: acpi_tb_uninstall_table
*
* PARAMETERS: table_info - A table info struct
*
* RETURN: Pointer to the next table in the list (of same type)
*
* DESCRIPTION: Free the memory associated with an internal ACPI table that
* is either installed or has never been installed.
* Table mutex should be locked.
*
******************************************************************************/
struct acpi_table_desc *
acpi_tb_uninstall_table (
struct acpi_table_desc *table_desc)
{
struct acpi_table_desc *next_desc;
ACPI_FUNCTION_TRACE_PTR ("tb_uninstall_table", table_desc);
if (!table_desc) {
return_PTR (NULL);
}
/* Unlink the descriptor from the doubly linked list */
if (table_desc->prev) {
table_desc->prev->next = table_desc->next;
}
else {
/* Is first on list, update list head */
acpi_gbl_table_lists[table_desc->type].next = table_desc->next;
}
if (table_desc->next) {
table_desc->next->prev = table_desc->prev;
}
/* Free the memory allocated for the table itself */
acpi_tb_delete_single_table (table_desc);
/* Free the table descriptor */
next_desc = table_desc->next;
ACPI_MEM_FREE (table_desc);
/* Return pointer to the next descriptor */
return_PTR (next_desc);
}