492 строки
16 KiB
C
492 строки
16 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: tbinstal - ACPI table installation and removal
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2015, Intel Corp.
|
|
* 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 "accommon.h"
|
|
#include "actables.h"
|
|
|
|
#define _COMPONENT ACPI_TABLES
|
|
ACPI_MODULE_NAME("tbinstal")
|
|
|
|
/* Local prototypes */
|
|
static u8
|
|
acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index);
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_compare_tables
|
|
*
|
|
* PARAMETERS: table_desc - Table 1 descriptor to be compared
|
|
* table_index - Index of table 2 to be compared
|
|
*
|
|
* RETURN: TRUE if both tables are identical.
|
|
*
|
|
* DESCRIPTION: This function compares a table with another table that has
|
|
* already been installed in the root table list.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static u8
|
|
acpi_tb_compare_tables(struct acpi_table_desc *table_desc, u32 table_index)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
u8 is_identical;
|
|
struct acpi_table_header *table;
|
|
u32 table_length;
|
|
u8 table_flags;
|
|
|
|
status =
|
|
acpi_tb_acquire_table(&acpi_gbl_root_table_list.tables[table_index],
|
|
&table, &table_length, &table_flags);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (FALSE);
|
|
}
|
|
|
|
/*
|
|
* Check for a table match on the entire table length,
|
|
* not just the header.
|
|
*/
|
|
is_identical = (u8)((table_desc->length != table_length ||
|
|
memcmp(table_desc->pointer, table, table_length)) ?
|
|
FALSE : TRUE);
|
|
|
|
/* Release the acquired table */
|
|
|
|
acpi_tb_release_table(table, table_length, table_flags);
|
|
return (is_identical);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_install_table_with_override
|
|
*
|
|
* PARAMETERS: new_table_desc - New table descriptor to install
|
|
* override - Whether override should be performed
|
|
* table_index - Where the table index is returned
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Install an ACPI table into the global data structure. The
|
|
* table override mechanism is called to allow the host
|
|
* OS to replace any table before it is installed in the root
|
|
* table array.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_tb_install_table_with_override(struct acpi_table_desc *new_table_desc,
|
|
u8 override, u32 *table_index)
|
|
{
|
|
u32 i;
|
|
acpi_status status;
|
|
|
|
status = acpi_tb_get_next_table_descriptor(&i, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* ACPI Table Override:
|
|
*
|
|
* Before we install the table, let the host OS override it with a new
|
|
* one if desired. Any table within the RSDT/XSDT can be replaced,
|
|
* including the DSDT which is pointed to by the FADT.
|
|
*/
|
|
if (override) {
|
|
acpi_tb_override_table(new_table_desc);
|
|
}
|
|
|
|
acpi_tb_init_table_descriptor(&acpi_gbl_root_table_list.tables[i],
|
|
new_table_desc->address,
|
|
new_table_desc->flags,
|
|
new_table_desc->pointer);
|
|
|
|
acpi_tb_print_table_header(new_table_desc->address,
|
|
new_table_desc->pointer);
|
|
|
|
/* This synchronizes acpi_gbl_dsdt_index */
|
|
|
|
*table_index = i;
|
|
|
|
/* Set the global integer width (based upon revision of the DSDT) */
|
|
|
|
if (i == acpi_gbl_dsdt_index) {
|
|
acpi_ut_set_integer_width(new_table_desc->pointer->revision);
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_install_fixed_table
|
|
*
|
|
* PARAMETERS: address - Physical address of DSDT or FACS
|
|
* signature - Table signature, NULL if no need to
|
|
* match
|
|
* table_index - Where the table index is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a fixed ACPI table (DSDT/FACS) into the global data
|
|
* structure.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_tb_install_fixed_table(acpi_physical_address address,
|
|
char *signature, u32 *table_index)
|
|
{
|
|
struct acpi_table_desc new_table_desc;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(tb_install_fixed_table);
|
|
|
|
if (!address) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Null physical address for ACPI table [%s]",
|
|
signature));
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Fill a table descriptor for validation */
|
|
|
|
status = acpi_tb_acquire_temp_table(&new_table_desc, address,
|
|
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Could not acquire table length at %8.8X%8.8X",
|
|
ACPI_FORMAT_UINT64(address)));
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Validate and verify a table before installation */
|
|
|
|
status = acpi_tb_verify_temp_table(&new_table_desc, signature);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto release_and_exit;
|
|
}
|
|
|
|
/* Add the table to the global root table list */
|
|
|
|
acpi_tb_install_table_with_override(&new_table_desc, TRUE, table_index);
|
|
|
|
release_and_exit:
|
|
|
|
/* Release the temporary table descriptor */
|
|
|
|
acpi_tb_release_temp_table(&new_table_desc);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_install_standard_table
|
|
*
|
|
* PARAMETERS: address - Address of the table (might be a virtual
|
|
* address depending on the table_flags)
|
|
* flags - Flags for the table
|
|
* reload - Whether reload should be performed
|
|
* override - Whether override should be performed
|
|
* table_index - Where the table index is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to install an ACPI table that is
|
|
* neither DSDT nor FACS (a "standard" table.)
|
|
* When this function is called by "Load" or "LoadTable" opcodes,
|
|
* or by acpi_load_table() API, the "Reload" parameter is set.
|
|
* After sucessfully returning from this function, table is
|
|
* "INSTALLED" but not "VALIDATED".
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_tb_install_standard_table(acpi_physical_address address,
|
|
u8 flags,
|
|
u8 reload, u8 override, u32 *table_index)
|
|
{
|
|
u32 i;
|
|
acpi_status status = AE_OK;
|
|
struct acpi_table_desc new_table_desc;
|
|
|
|
ACPI_FUNCTION_TRACE(tb_install_standard_table);
|
|
|
|
/* Acquire a temporary table descriptor for validation */
|
|
|
|
status = acpi_tb_acquire_temp_table(&new_table_desc, address, flags);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Could not acquire table length at %8.8X%8.8X",
|
|
ACPI_FORMAT_UINT64(address)));
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Optionally do not load any SSDTs from the RSDT/XSDT. This can
|
|
* be useful for debugging ACPI problems on some machines.
|
|
*/
|
|
if (!reload &&
|
|
acpi_gbl_disable_ssdt_table_install &&
|
|
ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) {
|
|
ACPI_INFO((AE_INFO,
|
|
"Ignoring installation of %4.4s at %8.8X%8.8X",
|
|
new_table_desc.signature.ascii,
|
|
ACPI_FORMAT_UINT64(address)));
|
|
goto release_and_exit;
|
|
}
|
|
|
|
/* Validate and verify a table before installation */
|
|
|
|
status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto release_and_exit;
|
|
}
|
|
|
|
if (reload) {
|
|
/*
|
|
* Validate the incoming table signature.
|
|
*
|
|
* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
|
|
* 2) We added support for OEMx tables, signature "OEM".
|
|
* 3) Valid tables were encountered with a null signature, so we just
|
|
* gave up on validating the signature, (05/2008).
|
|
* 4) We encountered non-AML tables such as the MADT, which caused
|
|
* interpreter errors and kernel faults. So now, we once again allow
|
|
* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
|
|
*/
|
|
if ((new_table_desc.signature.ascii[0] != 0x00) &&
|
|
(!ACPI_COMPARE_NAME
|
|
(&new_table_desc.signature, ACPI_SIG_SSDT))
|
|
&& (strncmp(new_table_desc.signature.ascii, "OEM", 3))) {
|
|
ACPI_BIOS_ERROR((AE_INFO,
|
|
"Table has invalid signature [%4.4s] (0x%8.8X), "
|
|
"must be SSDT or OEMx",
|
|
acpi_ut_valid_acpi_name(new_table_desc.
|
|
signature.
|
|
ascii) ?
|
|
new_table_desc.signature.
|
|
ascii : "????",
|
|
new_table_desc.signature.integer));
|
|
|
|
status = AE_BAD_SIGNATURE;
|
|
goto release_and_exit;
|
|
}
|
|
|
|
/* Check if table is already registered */
|
|
|
|
for (i = 0; i < acpi_gbl_root_table_list.current_table_count;
|
|
++i) {
|
|
/*
|
|
* Check for a table match on the entire table length,
|
|
* not just the header.
|
|
*/
|
|
if (!acpi_tb_compare_tables(&new_table_desc, i)) {
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Note: the current mechanism does not unregister a table if it is
|
|
* dynamically unloaded. The related namespace entries are deleted,
|
|
* but the table remains in the root table list.
|
|
*
|
|
* The assumption here is that the number of different tables that
|
|
* will be loaded is actually small, and there is minimal overhead
|
|
* in just keeping the table in case it is needed again.
|
|
*
|
|
* If this assumption changes in the future (perhaps on large
|
|
* machines with many table load/unload operations), tables will
|
|
* need to be unregistered when they are unloaded, and slots in the
|
|
* root table list should be reused when empty.
|
|
*/
|
|
if (acpi_gbl_root_table_list.tables[i].
|
|
flags & ACPI_TABLE_IS_LOADED) {
|
|
|
|
/* Table is still loaded, this is an error */
|
|
|
|
status = AE_ALREADY_EXISTS;
|
|
goto release_and_exit;
|
|
} else {
|
|
/*
|
|
* Table was unloaded, allow it to be reloaded.
|
|
* As we are going to return AE_OK to the caller, we should
|
|
* take the responsibility of freeing the input descriptor.
|
|
* Refill the input descriptor to ensure
|
|
* acpi_tb_install_table_with_override() can be called again to
|
|
* indicate the re-installation.
|
|
*/
|
|
acpi_tb_uninstall_table(&new_table_desc);
|
|
*table_index = i;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Add the table to the global root table list */
|
|
|
|
acpi_tb_install_table_with_override(&new_table_desc, override,
|
|
table_index);
|
|
|
|
release_and_exit:
|
|
|
|
/* Release the temporary table descriptor */
|
|
|
|
acpi_tb_release_temp_table(&new_table_desc);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_override_table
|
|
*
|
|
* PARAMETERS: old_table_desc - Validated table descriptor to be
|
|
* overridden
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Attempt table override by calling the OSL override functions.
|
|
* Note: If the table is overridden, then the entire new table
|
|
* is acquired and returned by this function.
|
|
* Before/after invocation, the table descriptor is in a state
|
|
* that is "VALIDATED".
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_tb_override_table(struct acpi_table_desc *old_table_desc)
|
|
{
|
|
acpi_status status;
|
|
char *override_type;
|
|
struct acpi_table_desc new_table_desc;
|
|
struct acpi_table_header *table;
|
|
acpi_physical_address address;
|
|
u32 length;
|
|
|
|
/* (1) Attempt logical override (returns a logical address) */
|
|
|
|
status = acpi_os_table_override(old_table_desc->pointer, &table);
|
|
if (ACPI_SUCCESS(status) && table) {
|
|
acpi_tb_acquire_temp_table(&new_table_desc,
|
|
ACPI_PTR_TO_PHYSADDR(table),
|
|
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL);
|
|
override_type = "Logical";
|
|
goto finish_override;
|
|
}
|
|
|
|
/* (2) Attempt physical override (returns a physical address) */
|
|
|
|
status = acpi_os_physical_table_override(old_table_desc->pointer,
|
|
&address, &length);
|
|
if (ACPI_SUCCESS(status) && address && length) {
|
|
acpi_tb_acquire_temp_table(&new_table_desc, address,
|
|
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
|
|
override_type = "Physical";
|
|
goto finish_override;
|
|
}
|
|
|
|
return; /* There was no override */
|
|
|
|
finish_override:
|
|
|
|
/* Validate and verify a table before overriding */
|
|
|
|
status = acpi_tb_verify_temp_table(&new_table_desc, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
ACPI_INFO((AE_INFO, "%4.4s 0x%8.8X%8.8X"
|
|
" %s table override, new table: 0x%8.8X%8.8X",
|
|
old_table_desc->signature.ascii,
|
|
ACPI_FORMAT_UINT64(old_table_desc->address),
|
|
override_type, ACPI_FORMAT_UINT64(new_table_desc.address)));
|
|
|
|
/* We can now uninstall the original table */
|
|
|
|
acpi_tb_uninstall_table(old_table_desc);
|
|
|
|
/*
|
|
* Replace the original table descriptor and keep its state as
|
|
* "VALIDATED".
|
|
*/
|
|
acpi_tb_init_table_descriptor(old_table_desc, new_table_desc.address,
|
|
new_table_desc.flags,
|
|
new_table_desc.pointer);
|
|
acpi_tb_validate_temp_table(old_table_desc);
|
|
|
|
/* Release the temporary table descriptor */
|
|
|
|
acpi_tb_release_temp_table(&new_table_desc);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_tb_uninstall_table
|
|
*
|
|
* PARAMETERS: table_desc - Table descriptor
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Delete one internal ACPI table
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_tb_uninstall_table(struct acpi_table_desc *table_desc)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE(tb_uninstall_table);
|
|
|
|
/* Table must be installed */
|
|
|
|
if (!table_desc->address) {
|
|
return_VOID;
|
|
}
|
|
|
|
acpi_tb_invalidate_table(table_desc);
|
|
|
|
if ((table_desc->flags & ACPI_TABLE_ORIGIN_MASK) ==
|
|
ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL) {
|
|
ACPI_FREE(ACPI_PHYSADDR_TO_PTR(table_desc->address));
|
|
}
|
|
|
|
table_desc->address = ACPI_PTR_TO_PHYSADDR(NULL);
|
|
return_VOID;
|
|
}
|