0,0 → 1,491 |
/****************************************************************************** |
* |
* 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; |
} |