mirror of https://gitee.com/openkylin/linux.git
298 lines
8.9 KiB
C
298 lines
8.9 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: tbinstal - ACPI table installation and removal
|
|
*
|
|
* Copyright (C) 2000 - 2018, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "actables.h"
|
|
|
|
#define _COMPONENT ACPI_TABLES
|
|
ACPI_MODULE_NAME("tbinstal")
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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_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 verify and install an ACPI table.
|
|
* When this function is called by "Load" or "LoadTable" opcodes,
|
|
* or by acpi_load_table() API, the "Reload" parameter is set.
|
|
* After successfully 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(("Ignoring installation of %4.4s at %8.8X%8.8X",
|
|
new_table_desc.signature.ascii,
|
|
ACPI_FORMAT_UINT64(address)));
|
|
goto release_and_exit;
|
|
}
|
|
|
|
/* Acquire the table lock */
|
|
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
|
|
/* Validate and verify a table before installation */
|
|
|
|
status = acpi_tb_verify_temp_table(&new_table_desc, NULL, &i);
|
|
if (ACPI_FAILURE(status)) {
|
|
if (status == AE_CTRL_TERMINATE) {
|
|
/*
|
|
* 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);
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
*table_index = i;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Add the table to the global root table list */
|
|
|
|
acpi_tb_install_table_with_override(&new_table_desc, override,
|
|
table_index);
|
|
|
|
/* Invoke table handler */
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
acpi_tb_notify_table(ACPI_TABLE_EVENT_INSTALL, new_table_desc.pointer);
|
|
(void)acpi_ut_acquire_mutex(ACPI_MTX_TABLES);
|
|
|
|
unlock_and_exit:
|
|
|
|
/* Release the table lock */
|
|
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_TABLES);
|
|
|
|
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;
|
|
struct acpi_table_desc new_table_desc;
|
|
struct acpi_table_header *table;
|
|
acpi_physical_address address;
|
|
u32 length;
|
|
ACPI_ERROR_ONLY(char *override_type);
|
|
|
|
/* (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);
|
|
ACPI_ERROR_ONLY(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);
|
|
ACPI_ERROR_ONLY(override_type = "Physical");
|
|
goto finish_override;
|
|
}
|
|
|
|
return; /* There was no override */
|
|
|
|
finish_override:
|
|
|
|
/*
|
|
* Validate and verify a table before overriding, no nested table
|
|
* duplication check as it's too complicated and unnecessary.
|
|
*/
|
|
status = acpi_tb_verify_temp_table(&new_table_desc, NULL, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
return;
|
|
}
|
|
|
|
ACPI_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;
|
|
}
|