2018-03-15 07:13:07 +08:00
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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2005-04-17 06:20:36 +08:00
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/******************************************************************************
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*
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* Module Name: exutils - interpreter/scanner utilities
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*
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2018-01-05 02:06:38 +08:00
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* Copyright (C) 2000 - 2018, Intel Corp.
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2005-04-17 06:20:36 +08:00
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*
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2018-03-15 07:13:07 +08:00
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*****************************************************************************/
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2005-04-17 06:20:36 +08:00
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/*
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* DEFINE_AML_GLOBALS is tested in amlcode.h
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* to determine whether certain global names should be "defined" or only
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2012-10-31 10:26:55 +08:00
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* "declared" in the current compilation. This enhances maintainability
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2005-04-17 06:20:36 +08:00
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* by enabling a single header file to embody all knowledge of the names
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* in question.
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*
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* Exactly one module of any executable should #define DEFINE_GLOBALS
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2012-10-31 10:26:55 +08:00
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* before #including the header files which use this convention. The
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2005-04-17 06:20:36 +08:00
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* names in question will be defined and initialized in that module,
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* and declared as extern in all other modules which #include those
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* header files.
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*/
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#define DEFINE_AML_GLOBALS
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#include <acpi/acpi.h>
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2009-01-09 13:30:03 +08:00
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#include "accommon.h"
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#include "acinterp.h"
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#include "amlcode.h"
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2005-04-17 06:20:36 +08:00
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#define _COMPONENT ACPI_EXECUTER
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2005-08-05 12:44:28 +08:00
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ACPI_MODULE_NAME("exutils")
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2005-04-17 06:20:36 +08:00
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2005-04-19 10:49:35 +08:00
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/* Local prototypes */
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2010-01-21 10:06:32 +08:00
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static u32 acpi_ex_digits_needed(u64 value, u32 base);
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2005-04-19 10:49:35 +08:00
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#ifndef ACPI_NO_METHOD_EXECUTION
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2005-04-17 06:20:36 +08:00
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_enter_interpreter
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*
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* PARAMETERS: None
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*
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2007-05-10 10:56:38 +08:00
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* RETURN: None
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2005-04-19 10:49:35 +08:00
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*
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2007-05-10 10:56:38 +08:00
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* DESCRIPTION: Enter the interpreter execution region. Failure to enter
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* the interpreter region is a fatal system error. Used in
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* conjunction with exit_interpreter.
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2005-04-17 06:20:36 +08:00
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*
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******************************************************************************/
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2007-05-10 10:56:38 +08:00
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void acpi_ex_enter_interpreter(void)
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2005-04-17 06:20:36 +08:00
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{
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2005-08-05 12:44:28 +08:00
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acpi_status status;
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2005-04-17 06:20:36 +08:00
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2007-02-03 00:48:20 +08:00
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ACPI_FUNCTION_TRACE(ex_enter_interpreter);
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2005-04-17 06:20:36 +08:00
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2006-06-09 04:29:00 +08:00
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status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
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2005-08-05 12:44:28 +08:00
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if (ACPI_FAILURE(status)) {
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2007-05-10 10:56:38 +08:00
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ACPI_ERROR((AE_INFO,
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"Could not acquire AML Interpreter mutex"));
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2005-04-17 06:20:36 +08:00
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}
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ACPICA: Namespace: Fix dynamic table loading issues
ACPICA commit 767ee53354e0c4b7e8e7c57c6dd7bf569f0d52bb
There are issues related to the namespace/interpreter locks, which causes
several ACPI functionalities not specification compliant. The lock issues
were detectec when we were trying to fix the functionalities (please see
Link # [1] for the details).
What's the lock issues? Let's first look into the namespace/interpreter
lock usages inside of the object evaluation and the table loading which are
the key AML interpretion code paths:
Table loading:
acpi_ns_load_table
L(Namespace)
acpi_ns_parse_table
acpi_ns_one_complete_parse(LOAD_PASS1/LOAD_PASS2)
acpi_ds_load1_begion_op
acpi_ds_load1_end_op
acpi_ds_load2_begion_op
acpi_ds_load2_end_op
U(Namespace)
Object evaluation:
acpi_ns_evaluate
L(Interpreter)
acpi_ps_execute_method
acpi_ds_exec_begin_op
acpi_ds_exec_end_op
U(Interpreter)
acpi_ns_load_table
L(Namespace)
U(Namespace)
acpi_ev_initialize_region
L(Namespace)
U(Namespace)
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
L(Interpreter)
U(Interpreter)
L(Interpreter)
acpi_ex_resolve_node_to_value
U(Interpreter)
acpi_ns_check_return_value
Where:
1. L(Interpreter) means acquire(MTX_INTERPRETER);
2. U(Interpreter) means release(MTX_INTERPRETER);
3. L(Namespace) means acquire(MTX_NAMESPACE);
4. U(Namespace) means release(MTX_NAMESPACE);
We can see that acpi_ns_exec_module_code() (which invokes acpi_ns_evaluate) is
implemented in a deferred way just in order to avoid to reacquire the
namespace lock. This is in fact the root cause of many other ACPICA issues:
1. We now know for sure that the module code should be executed right in
place by the Windows AML interpreter. So in the current design, if
the region initializations/accesses or the table loadings (where the
namespace surely should be locked again) happening during the table
loading period, dead lock could happen because ACPICA never unlocks the
namespace during the AML interpretion.
2. ACPICA interpreter just ensures that all static namespace nodes (named
objects created during the acpi_load_tables()) are created
(acpi_ns_lookup()) with the correct lock held, but doesn't ensure that
the named objects created by the control method are created with the
same correct lock held. It requires the control methods to be executed
in a serial way after "loading a table", that's why ACPICA requires
method auto serialization.
This patch fixes these software design issues by extending interpreter
enter/exit APIs to hold both interpreter/namespace locks to ensure the lock
order correctness, so that we can get these code paths:
Table loading:
acpi_ns_load_table
E(Interpreter)
acpi_ns_parse_table
acpi_ns_one_complete_parse
acpi_ns_execute_table
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Object evaluation:
acpi_ns_evaluate
E(Interpreter)
acpi_ps_execute_method
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Where:
1. E(Interpreter) means acquire(MTX_INTERPRETER, MTX_NAMESPACE);
2. X(Interpreter) means release(MTX_NAMESPACE, MTX_INTERPRETER);
After this change, we can see:
1. All namespace nodes creations are locked by the namespace lock.
2. All namespace nodes referencing are locked with the same lock.
3. But we also can notice a defact that, all namespace nodes deletions
could be affected by this change. As a consequence,
acpi_ns_delete_namespace_subtree() may delete a static namespace node that
is still referenced by the interpreter (for example, the parser scopes).
Currently, we needn't worry about the last defact because in ACPICA, table
unloading is not fully functioning, its design strictly relies on the fact
that when the namespace deletion happens, either the AML table or the OSPMs
should have been notified and thus either the AML table or the OSPMs
shouldn't reference deletion-related namespace nodes during the namespace
deletion. And this change still works with the above restrictions applied.
While making this a-step-forward helps us to correct the wrong grammar to
pull many things back to the correct rail. And pulling things back to the
correct rail in return makes it possible for us to support fully
functioning table unloading after doing many cleanups.
While this patch is generated, all namespace locks are examined to ensure
that they can meet either of the following pattens:
1. L(Namespace)
U(Namespace)
2. E(Interpreter)
X(Interpreter)
3. E(Interpreter)
X(Interpreter)
L(Namespace)
U(Namespace)
E(Interpreter)
X(Interpreter)
We ensure this by adding X(Interpreter)/E(Interpreter) or removing
U(Namespace)/L(Namespace) for those currently are executed in the following
order:
E(Interpreter)
L(Namespace)
U(Namespace)
X(Interpreter)
And adding E(Interpreter)/X(Interpreter) for those currently are executed
in the following order:
X(Interpreter)
E(Interpreter)
Originally, the interpreter lock is held for the execution AML opcodes, the
namespace lock is held for the named object creation AML opcodes. Since
they are actually same in MS interpreter (can all be executed during the
table loading), we can combine the 2 locks and tune the locking code better
in this way. Lv Zheng.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=153541 # [1]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=121701 # [1]
Link: https://bugs.acpica.org/show_bug.cgi?id=1323
Link: https://github.com/acpica/acpica/commit/767ee533
Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reported-and-tested-by: Greg White <gwhite@kupulau.com>
Reported-and-tested-by: Dutch Guy <lucht_piloot@gmx.net>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-07 14:07:10 +08:00
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO, "Could not acquire AML Namespace mutex"));
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}
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2005-04-17 06:20:36 +08:00
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2007-05-10 10:56:38 +08:00
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return_VOID;
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2007-02-03 00:48:20 +08:00
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}
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2007-05-10 10:56:38 +08:00
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_exit_interpreter
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*
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* PARAMETERS: None
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*
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* RETURN: None
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2007-03-15 16:10:36 +08:00
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*
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2007-05-10 10:56:38 +08:00
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* DESCRIPTION: Exit the interpreter execution region. This is the top level
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* routine used to exit the interpreter when all processing has
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ACPICA: Remove global option to serialize all control methods.
According to the reports, the "acpi_serialize" mechanism is broken as:
A. The parallel method calls can still happen when the interpreter lock is
released under the following conditions:
1. External callbacks are invoked, for example, by the region handlers,
the exception handlers, etc.;
2. Module level execution is performed when Load/LoadTable opcodes are
executed, and
3. The _REG control methods are invoked to complete the region
registrations.
B. For the following situations, the interpreter lock need to be released
even for a serialized method while currently, the lock-releasing
operation is marked as a no-op by
acpi_ex_relinquish/reacquire_interpreter() when this mechanism is
enabled:
1. Wait opcode is executed,
2. Acquire opcode is executed, and
3. Sleep opcode is executed.
This patch removes this mechanism and the internal
acpi_ex_relinquish/reacquire_interpreter() APIs. Lv Zheng.
References: https://bugzilla.kernel.org/show_bug.cgi?id=52191
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-03-24 14:48:45 +08:00
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* been completed, or when the method blocks.
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*
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* Cases where the interpreter is unlocked internally:
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* 1) Method will be blocked on a Sleep() AML opcode
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* 2) Method will be blocked on an Acquire() AML opcode
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* 3) Method will be blocked on a Wait() AML opcode
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* 4) Method will be blocked to acquire the global lock
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* 5) Method will be blocked waiting to execute a serialized control
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* method that is currently executing
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* 6) About to invoke a user-installed opregion handler
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2005-04-17 06:20:36 +08:00
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*
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******************************************************************************/
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2005-08-05 12:44:28 +08:00
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void acpi_ex_exit_interpreter(void)
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2005-04-17 06:20:36 +08:00
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{
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2005-08-05 12:44:28 +08:00
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acpi_status status;
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2005-04-17 06:20:36 +08:00
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ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-22 05:15:00 +08:00
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ACPI_FUNCTION_TRACE(ex_exit_interpreter);
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2005-04-17 06:20:36 +08:00
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ACPICA: Namespace: Fix dynamic table loading issues
ACPICA commit 767ee53354e0c4b7e8e7c57c6dd7bf569f0d52bb
There are issues related to the namespace/interpreter locks, which causes
several ACPI functionalities not specification compliant. The lock issues
were detectec when we were trying to fix the functionalities (please see
Link # [1] for the details).
What's the lock issues? Let's first look into the namespace/interpreter
lock usages inside of the object evaluation and the table loading which are
the key AML interpretion code paths:
Table loading:
acpi_ns_load_table
L(Namespace)
acpi_ns_parse_table
acpi_ns_one_complete_parse(LOAD_PASS1/LOAD_PASS2)
acpi_ds_load1_begion_op
acpi_ds_load1_end_op
acpi_ds_load2_begion_op
acpi_ds_load2_end_op
U(Namespace)
Object evaluation:
acpi_ns_evaluate
L(Interpreter)
acpi_ps_execute_method
acpi_ds_exec_begin_op
acpi_ds_exec_end_op
U(Interpreter)
acpi_ns_load_table
L(Namespace)
U(Namespace)
acpi_ev_initialize_region
L(Namespace)
U(Namespace)
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
L(Interpreter)
U(Interpreter)
L(Interpreter)
acpi_ex_resolve_node_to_value
U(Interpreter)
acpi_ns_check_return_value
Where:
1. L(Interpreter) means acquire(MTX_INTERPRETER);
2. U(Interpreter) means release(MTX_INTERPRETER);
3. L(Namespace) means acquire(MTX_NAMESPACE);
4. U(Namespace) means release(MTX_NAMESPACE);
We can see that acpi_ns_exec_module_code() (which invokes acpi_ns_evaluate) is
implemented in a deferred way just in order to avoid to reacquire the
namespace lock. This is in fact the root cause of many other ACPICA issues:
1. We now know for sure that the module code should be executed right in
place by the Windows AML interpreter. So in the current design, if
the region initializations/accesses or the table loadings (where the
namespace surely should be locked again) happening during the table
loading period, dead lock could happen because ACPICA never unlocks the
namespace during the AML interpretion.
2. ACPICA interpreter just ensures that all static namespace nodes (named
objects created during the acpi_load_tables()) are created
(acpi_ns_lookup()) with the correct lock held, but doesn't ensure that
the named objects created by the control method are created with the
same correct lock held. It requires the control methods to be executed
in a serial way after "loading a table", that's why ACPICA requires
method auto serialization.
This patch fixes these software design issues by extending interpreter
enter/exit APIs to hold both interpreter/namespace locks to ensure the lock
order correctness, so that we can get these code paths:
Table loading:
acpi_ns_load_table
E(Interpreter)
acpi_ns_parse_table
acpi_ns_one_complete_parse
acpi_ns_execute_table
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Object evaluation:
acpi_ns_evaluate
E(Interpreter)
acpi_ps_execute_method
X(Interpreter)
acpi_ns_load_table
acpi_ev_initialize_region
address_space.Setup
address_space.Handler
acpi_os_wait_semaphore
acpi_os_acquire_mutex
acpi_os_sleep
E(Interpreter)
X(Interpreter)
Where:
1. E(Interpreter) means acquire(MTX_INTERPRETER, MTX_NAMESPACE);
2. X(Interpreter) means release(MTX_NAMESPACE, MTX_INTERPRETER);
After this change, we can see:
1. All namespace nodes creations are locked by the namespace lock.
2. All namespace nodes referencing are locked with the same lock.
3. But we also can notice a defact that, all namespace nodes deletions
could be affected by this change. As a consequence,
acpi_ns_delete_namespace_subtree() may delete a static namespace node that
is still referenced by the interpreter (for example, the parser scopes).
Currently, we needn't worry about the last defact because in ACPICA, table
unloading is not fully functioning, its design strictly relies on the fact
that when the namespace deletion happens, either the AML table or the OSPMs
should have been notified and thus either the AML table or the OSPMs
shouldn't reference deletion-related namespace nodes during the namespace
deletion. And this change still works with the above restrictions applied.
While making this a-step-forward helps us to correct the wrong grammar to
pull many things back to the correct rail. And pulling things back to the
correct rail in return makes it possible for us to support fully
functioning table unloading after doing many cleanups.
While this patch is generated, all namespace locks are examined to ensure
that they can meet either of the following pattens:
1. L(Namespace)
U(Namespace)
2. E(Interpreter)
X(Interpreter)
3. E(Interpreter)
X(Interpreter)
L(Namespace)
U(Namespace)
E(Interpreter)
X(Interpreter)
We ensure this by adding X(Interpreter)/E(Interpreter) or removing
U(Namespace)/L(Namespace) for those currently are executed in the following
order:
E(Interpreter)
L(Namespace)
U(Namespace)
X(Interpreter)
And adding E(Interpreter)/X(Interpreter) for those currently are executed
in the following order:
X(Interpreter)
E(Interpreter)
Originally, the interpreter lock is held for the execution AML opcodes, the
namespace lock is held for the named object creation AML opcodes. Since
they are actually same in MS interpreter (can all be executed during the
table loading), we can combine the 2 locks and tune the locking code better
in this way. Lv Zheng.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=153541 # [1]
Link: https://bugzilla.kernel.org/show_bug.cgi?id=121701 # [1]
Link: https://bugs.acpica.org/show_bug.cgi?id=1323
Link: https://github.com/acpica/acpica/commit/767ee533
Reported-and-tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reported-and-tested-by: Greg White <gwhite@kupulau.com>
Reported-and-tested-by: Dutch Guy <lucht_piloot@gmx.net>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-07 14:07:10 +08:00
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status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO, "Could not release AML Namespace mutex"));
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}
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2006-06-09 04:29:00 +08:00
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status = acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
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2005-08-05 12:44:28 +08:00
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if (ACPI_FAILURE(status)) {
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2007-05-10 10:56:38 +08:00
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ACPI_ERROR((AE_INFO,
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"Could not release AML Interpreter mutex"));
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}
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return_VOID;
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_truncate_for32bit_table
|
|
|
|
*
|
|
|
|
* PARAMETERS: obj_desc - Object to be truncated
|
|
|
|
*
|
2012-12-31 08:07:18 +08:00
|
|
|
* RETURN: TRUE if a truncation was performed, FALSE otherwise.
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2007-05-10 10:56:38 +08:00
|
|
|
* DESCRIPTION: Truncate an ACPI Integer to 32 bits if the execution mode is
|
|
|
|
* 32-bit, as determined by the revision of the DSDT.
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2012-12-31 08:07:18 +08:00
|
|
|
u8 acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
ACPI_FUNCTION_ENTRY();
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Object must be a valid number and we must be executing
|
2012-12-31 08:07:18 +08:00
|
|
|
* a control method. Object could be NS node for AML_INT_NAMEPATH_OP.
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
|
|
|
if ((!obj_desc) ||
|
2008-04-10 23:06:37 +08:00
|
|
|
(ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != ACPI_DESC_TYPE_OPERAND) ||
|
2009-02-18 14:44:03 +08:00
|
|
|
(obj_desc->common.type != ACPI_TYPE_INTEGER)) {
|
2012-12-31 08:07:18 +08:00
|
|
|
return (FALSE);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2012-12-31 08:07:18 +08:00
|
|
|
if ((acpi_gbl_integer_byte_width == 4) &&
|
|
|
|
(obj_desc->integer.value > (u64)ACPI_UINT32_MAX)) {
|
2005-04-17 06:20:36 +08:00
|
|
|
/*
|
2015-12-29 13:54:36 +08:00
|
|
|
* We are executing in a 32-bit ACPI table. Truncate
|
|
|
|
* the value to 32 bits by zeroing out the upper 32-bit field
|
2005-04-17 06:20:36 +08:00
|
|
|
*/
|
2012-12-31 08:07:18 +08:00
|
|
|
obj_desc->integer.value &= (u64)ACPI_UINT32_MAX;
|
|
|
|
return (TRUE);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
2012-12-31 08:07:18 +08:00
|
|
|
|
|
|
|
return (FALSE);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_acquire_global_lock
|
|
|
|
*
|
|
|
|
* PARAMETERS: field_flags - Flags with Lock rule:
|
|
|
|
* always_lock or never_lock
|
|
|
|
*
|
2008-04-10 23:06:37 +08:00
|
|
|
* RETURN: None
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2008-04-10 23:06:37 +08:00
|
|
|
* DESCRIPTION: Obtain the ACPI hardware Global Lock, only if the field
|
|
|
|
* flags specifiy that it is to be obtained before field access.
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
void acpi_ex_acquire_global_lock(u32 field_flags)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
acpi_status status;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-22 05:15:00 +08:00
|
|
|
ACPI_FUNCTION_TRACE(ex_acquire_global_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
/* Only use the lock if the always_lock bit is set */
|
|
|
|
|
|
|
|
if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) {
|
|
|
|
return_VOID;
|
|
|
|
}
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
/* Attempt to get the global lock, wait forever */
|
2006-10-02 12:00:00 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
status = acpi_ex_acquire_mutex_object(ACPI_WAIT_FOREVER,
|
|
|
|
acpi_gbl_global_lock_mutex,
|
|
|
|
acpi_os_get_thread_id());
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
|
|
"Could not acquire Global Lock"));
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
return_VOID;
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_release_global_lock
|
|
|
|
*
|
2008-04-10 23:06:37 +08:00
|
|
|
* PARAMETERS: field_flags - Flags with Lock rule:
|
|
|
|
* always_lock or never_lock
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2005-04-19 10:49:35 +08:00
|
|
|
* RETURN: None
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2008-04-10 23:06:37 +08:00
|
|
|
* DESCRIPTION: Release the ACPI hardware Global Lock
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
void acpi_ex_release_global_lock(u32 field_flags)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
acpi_status status;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-22 05:15:00 +08:00
|
|
|
ACPI_FUNCTION_TRACE(ex_release_global_lock);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
/* Only use the lock if the always_lock bit is set */
|
|
|
|
|
|
|
|
if (!(field_flags & AML_FIELD_LOCK_RULE_MASK)) {
|
|
|
|
return_VOID;
|
|
|
|
}
|
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
/* Release the global lock */
|
2006-10-02 12:00:00 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
status = acpi_ex_release_mutex_object(acpi_gbl_global_lock_mutex);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
2006-10-02 12:00:00 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
/* Report the error, but there isn't much else we can do */
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2008-04-10 23:06:37 +08:00
|
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
|
|
"Could not release Global Lock"));
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
return_VOID;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_digits_needed
|
|
|
|
*
|
2012-07-12 09:40:10 +08:00
|
|
|
* PARAMETERS: value - Value to be represented
|
|
|
|
* base - Base of representation
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2005-04-19 10:49:35 +08:00
|
|
|
* RETURN: The number of digits.
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Calculate the number of digits needed to represent the Value
|
|
|
|
* in the given Base (Radix)
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2010-01-21 10:06:32 +08:00
|
|
|
static u32 acpi_ex_digits_needed(u64 value, u32 base)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
u32 num_digits;
|
2010-01-21 10:06:32 +08:00
|
|
|
u64 current_value;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
ACPI: ACPICA 20060421
Removed a device initialization optimization introduced in
20051216 where the _STA method was not run unless an _INI
was also present for the same device. This optimization
could cause problems because it could allow _INI methods
to be run within a not-present device subtree (If a
not-present device had no _INI, _STA would not be run,
the not-present status would not be discovered, and the
children of the device would be incorrectly traversed.)
Implemented a new _STA optimization where namespace
subtrees that do not contain _INI are identified and
ignored during device initialization. Selectively running
_STA can significantly improve boot time on large machines
(with assistance from Len Brown.)
Implemented support for the device initialization case
where the returned _STA flags indicate a device not-present
but functioning. In this case, _INI is not run, but the
device children are examined for presence, as per the
ACPI specification.
Implemented an additional change to the IndexField support
in order to conform to MS behavior. The value written to
the Index Register is not simply a byte offset, it is a
byte offset in units of the access width of the parent
Index Field. (Fiodor Suietov)
Defined and deployed a new OSL interface,
acpi_os_validate_address(). This interface is called during
the creation of all AML operation regions, and allows
the host OS to exert control over what addresses it will
allow the AML code to access. Operation Regions whose
addresses are disallowed will cause a runtime exception
when they are actually accessed (will not affect or abort
table loading.)
Defined and deployed a new OSL interface,
acpi_os_validate_interface(). This interface allows the host OS
to match the various "optional" interface/behavior strings
for the _OSI predefined control method as appropriate
(with assistance from Bjorn Helgaas.)
Restructured and corrected various problems in the
exception handling code paths within DsCallControlMethod
and DsTerminateControlMethod in dsmethod (with assistance
from Takayoshi Kochi.)
Modified the Linux source converter to ignore quoted string
literals while converting identifiers from mixed to lower
case. This will correct problems with the disassembler
and other areas where such strings must not be modified.
The ACPI_FUNCTION_* macros no longer require quotes around
the function name. This allows the Linux source converter
to convert the names, now that the converter ignores
quoted strings.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-04-22 05:15:00 +08:00
|
|
|
ACPI_FUNCTION_TRACE(ex_digits_needed);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2010-01-21 10:06:32 +08:00
|
|
|
/* u64 is unsigned, so we don't worry about a '-' prefix */
|
2005-04-17 06:20:36 +08:00
|
|
|
|
|
|
|
if (value == 0) {
|
2013-03-08 17:22:23 +08:00
|
|
|
return_UINT32(1);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
current_value = value;
|
|
|
|
num_digits = 0;
|
|
|
|
|
|
|
|
/* Count the digits in the requested base */
|
|
|
|
|
|
|
|
while (current_value) {
|
2005-08-05 12:44:28 +08:00
|
|
|
(void)acpi_ut_short_divide(current_value, base, ¤t_value,
|
|
|
|
NULL);
|
2005-04-17 06:20:36 +08:00
|
|
|
num_digits++;
|
|
|
|
}
|
|
|
|
|
2013-03-08 17:22:23 +08:00
|
|
|
return_UINT32(num_digits);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_eisa_id_to_string
|
|
|
|
*
|
2016-03-24 09:39:58 +08:00
|
|
|
* PARAMETERS: out_string - Where to put the converted string (8 bytes)
|
|
|
|
* compressed_id - EISAID to be converted
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2005-04-19 10:49:35 +08:00
|
|
|
* RETURN: None
|
|
|
|
*
|
2009-06-29 13:39:29 +08:00
|
|
|
* DESCRIPTION: Convert a numeric EISAID to string representation. Return
|
|
|
|
* buffer must be large enough to hold the string. The string
|
|
|
|
* returned is always exactly of length ACPI_EISAID_STRING_SIZE
|
|
|
|
* (includes null terminator). The EISAID is always 32 bits.
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2010-01-21 10:06:32 +08:00
|
|
|
void acpi_ex_eisa_id_to_string(char *out_string, u64 compressed_id)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2009-06-29 13:39:29 +08:00
|
|
|
u32 swapped_id;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
ACPI_FUNCTION_ENTRY();
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-06-29 13:39:29 +08:00
|
|
|
/* The EISAID should be a 32-bit integer */
|
|
|
|
|
|
|
|
if (compressed_id > ACPI_UINT32_MAX) {
|
|
|
|
ACPI_WARNING((AE_INFO,
|
2015-12-29 13:54:36 +08:00
|
|
|
"Expected EISAID is larger than 32 bits: "
|
|
|
|
"0x%8.8X%8.8X, truncating",
|
2009-06-29 13:39:29 +08:00
|
|
|
ACPI_FORMAT_UINT64(compressed_id)));
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
/* Swap ID to big-endian to get contiguous bits */
|
|
|
|
|
2009-06-29 13:39:29 +08:00
|
|
|
swapped_id = acpi_ut_dword_byte_swap((u32)compressed_id);
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2009-06-29 13:39:29 +08:00
|
|
|
/* First 3 bytes are uppercase letters. Next 4 bytes are hexadecimal */
|
|
|
|
|
|
|
|
out_string[0] =
|
|
|
|
(char)(0x40 + (((unsigned long)swapped_id >> 26) & 0x1F));
|
|
|
|
out_string[1] = (char)(0x40 + ((swapped_id >> 21) & 0x1F));
|
|
|
|
out_string[2] = (char)(0x40 + ((swapped_id >> 16) & 0x1F));
|
2010-01-21 10:06:32 +08:00
|
|
|
out_string[3] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 12);
|
|
|
|
out_string[4] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 8);
|
|
|
|
out_string[5] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 4);
|
|
|
|
out_string[6] = acpi_ut_hex_to_ascii_char((u64) swapped_id, 0);
|
2005-04-17 06:20:36 +08:00
|
|
|
out_string[7] = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
2009-06-29 13:39:29 +08:00
|
|
|
* FUNCTION: acpi_ex_integer_to_string
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2009-06-29 13:39:29 +08:00
|
|
|
* PARAMETERS: out_string - Where to put the converted string. At least
|
|
|
|
* 21 bytes are needed to hold the largest
|
|
|
|
* possible 64-bit integer.
|
2012-07-12 09:40:10 +08:00
|
|
|
* value - Value to be converted
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
2016-03-24 09:39:58 +08:00
|
|
|
* RETURN: Converted string in out_string
|
2005-04-19 10:49:35 +08:00
|
|
|
*
|
2009-06-29 13:39:29 +08:00
|
|
|
* DESCRIPTION: Convert a 64-bit integer to decimal string representation.
|
|
|
|
* Assumes string buffer is large enough to hold the string. The
|
|
|
|
* largest string is (ACPI_MAX64_DECIMAL_DIGITS + 1).
|
2005-04-17 06:20:36 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
2010-01-21 10:06:32 +08:00
|
|
|
void acpi_ex_integer_to_string(char *out_string, u64 value)
|
2005-04-17 06:20:36 +08:00
|
|
|
{
|
2005-08-05 12:44:28 +08:00
|
|
|
u32 count;
|
|
|
|
u32 digits_needed;
|
|
|
|
u32 remainder;
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
ACPI_FUNCTION_ENTRY();
|
2005-04-17 06:20:36 +08:00
|
|
|
|
2005-08-05 12:44:28 +08:00
|
|
|
digits_needed = acpi_ex_digits_needed(value, 10);
|
2005-04-17 06:20:36 +08:00
|
|
|
out_string[digits_needed] = 0;
|
|
|
|
|
|
|
|
for (count = digits_needed; count > 0; count--) {
|
2005-08-05 12:44:28 +08:00
|
|
|
(void)acpi_ut_short_divide(value, 10, &value, &remainder);
|
|
|
|
out_string[count - 1] = (char)('0' + remainder);
|
2005-04-17 06:20:36 +08:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-07-01 14:44:04 +08:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ex_pci_cls_to_string
|
|
|
|
*
|
|
|
|
* PARAMETERS: out_string - Where to put the converted string (7 bytes)
|
2016-03-24 09:39:58 +08:00
|
|
|
* class_code - PCI class code to be converted (3 bytes)
|
2015-07-01 14:44:04 +08:00
|
|
|
*
|
2016-03-24 09:39:58 +08:00
|
|
|
* RETURN: Converted string in out_string
|
2015-07-01 14:44:04 +08:00
|
|
|
*
|
|
|
|
* DESCRIPTION: Convert 3-bytes PCI class code to string representation.
|
|
|
|
* Return buffer must be large enough to hold the string. The
|
|
|
|
* string returned is always exactly of length
|
|
|
|
* ACPI_PCICLS_STRING_SIZE (includes null terminator).
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
void acpi_ex_pci_cls_to_string(char *out_string, u8 class_code[3])
|
|
|
|
{
|
|
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
|
|
|
|
/* All 3 bytes are hexadecimal */
|
|
|
|
|
|
|
|
out_string[0] = acpi_ut_hex_to_ascii_char((u64)class_code[0], 4);
|
|
|
|
out_string[1] = acpi_ut_hex_to_ascii_char((u64)class_code[0], 0);
|
|
|
|
out_string[2] = acpi_ut_hex_to_ascii_char((u64)class_code[1], 4);
|
|
|
|
out_string[3] = acpi_ut_hex_to_ascii_char((u64)class_code[1], 0);
|
|
|
|
out_string[4] = acpi_ut_hex_to_ascii_char((u64)class_code[2], 4);
|
|
|
|
out_string[5] = acpi_ut_hex_to_ascii_char((u64)class_code[2], 0);
|
|
|
|
out_string[6] = 0;
|
|
|
|
}
|
|
|
|
|
2011-11-30 09:35:05 +08:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_is_valid_space_id
|
|
|
|
*
|
|
|
|
* PARAMETERS: space_id - ID to be validated
|
|
|
|
*
|
2016-03-24 09:39:58 +08:00
|
|
|
* RETURN: TRUE if space_id is a valid/supported ID.
|
2011-11-30 09:35:05 +08:00
|
|
|
*
|
2012-07-12 09:40:10 +08:00
|
|
|
* DESCRIPTION: Validate an operation region space_ID.
|
2011-11-30 09:35:05 +08:00
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
u8 acpi_is_valid_space_id(u8 space_id)
|
|
|
|
{
|
|
|
|
|
|
|
|
if ((space_id >= ACPI_NUM_PREDEFINED_REGIONS) &&
|
|
|
|
(space_id < ACPI_USER_REGION_BEGIN) &&
|
|
|
|
(space_id != ACPI_ADR_SPACE_DATA_TABLE) &&
|
|
|
|
(space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
|
|
|
|
return (FALSE);
|
|
|
|
}
|
|
|
|
|
|
|
|
return (TRUE);
|
|
|
|
}
|
|
|
|
|
2005-04-17 06:20:36 +08:00
|
|
|
#endif
|