356 lines
11 KiB
C
356 lines
11 KiB
C
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: exutils - interpreter/scanner utilities
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2006, 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.
|
|
*/
|
|
|
|
/*
|
|
* DEFINE_AML_GLOBALS is tested in amlcode.h
|
|
* to determine whether certain global names should be "defined" or only
|
|
* "declared" in the current compilation. This enhances maintainability
|
|
* by enabling a single header file to embody all knowledge of the names
|
|
* in question.
|
|
*
|
|
* Exactly one module of any executable should #define DEFINE_GLOBALS
|
|
* before #including the header files which use this convention. The
|
|
* names in question will be defined and initialized in that module,
|
|
* and declared as extern in all other modules which #include those
|
|
* header files.
|
|
*/
|
|
|
|
#define DEFINE_AML_GLOBALS
|
|
|
|
#include <acpi/acpi.h>
|
|
#include <acpi/acinterp.h>
|
|
#include <acpi/amlcode.h>
|
|
#include <acpi/acevents.h>
|
|
|
|
#define _COMPONENT ACPI_EXECUTER
|
|
ACPI_MODULE_NAME("exutils")
|
|
|
|
/* Local prototypes */
|
|
static u32 acpi_ex_digits_needed(acpi_integer value, u32 base);
|
|
|
|
#ifndef ACPI_NO_METHOD_EXECUTION
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_enter_interpreter
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enter the interpreter execution region. Failure to enter
|
|
* the interpreter region is a fatal system error
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ex_enter_interpreter(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_enter_interpreter);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_INTERPRETER);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_ERROR((AE_INFO, "Could not acquire interpreter mutex"));
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_exit_interpreter
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Exit the interpreter execution region
|
|
*
|
|
* Cases where the interpreter is unlocked:
|
|
* 1) Completion of the execution of a control method
|
|
* 2) Method blocked on a Sleep() AML opcode
|
|
* 3) Method blocked on an Acquire() AML opcode
|
|
* 4) Method blocked on a Wait() AML opcode
|
|
* 5) Method blocked to acquire the global lock
|
|
* 6) Method blocked to execute a serialized control method that is
|
|
* already executing
|
|
* 7) About to invoke a user-installed opregion handler
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ex_exit_interpreter(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_exit_interpreter);
|
|
|
|
status = acpi_ut_release_mutex(ACPI_MTX_INTERPRETER);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_ERROR((AE_INFO, "Could not release interpreter mutex"));
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_truncate_for32bit_table
|
|
*
|
|
* PARAMETERS: obj_desc - Object to be truncated
|
|
*
|
|
* RETURN: none
|
|
*
|
|
* DESCRIPTION: Truncate a number to 32-bits if the currently executing method
|
|
* belongs to a 32-bit ACPI table.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc)
|
|
{
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/*
|
|
* Object must be a valid number and we must be executing
|
|
* a control method
|
|
*/
|
|
if ((!obj_desc) ||
|
|
(ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_INTEGER)) {
|
|
return;
|
|
}
|
|
|
|
if (acpi_gbl_integer_byte_width == 4) {
|
|
/*
|
|
* We are running a method that exists in a 32-bit ACPI table.
|
|
* Truncate the value to 32 bits by zeroing out the upper 32-bit field
|
|
*/
|
|
obj_desc->integer.value &= (acpi_integer) ACPI_UINT32_MAX;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_acquire_global_lock
|
|
*
|
|
* PARAMETERS: field_flags - Flags with Lock rule:
|
|
* always_lock or never_lock
|
|
*
|
|
* RETURN: TRUE/FALSE indicating whether the lock was actually acquired
|
|
*
|
|
* DESCRIPTION: Obtain the global lock and keep track of this fact via two
|
|
* methods. A global variable keeps the state of the lock, and
|
|
* the state is returned to the caller.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_ex_acquire_global_lock(u32 field_flags)
|
|
{
|
|
u8 locked = FALSE;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_acquire_global_lock);
|
|
|
|
/* Only attempt lock if the always_lock bit is set */
|
|
|
|
if (field_flags & AML_FIELD_LOCK_RULE_MASK) {
|
|
|
|
/* We should attempt to get the lock, wait forever */
|
|
|
|
status = acpi_ev_acquire_global_lock(ACPI_WAIT_FOREVER);
|
|
if (ACPI_SUCCESS(status)) {
|
|
locked = TRUE;
|
|
} else {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Could not acquire Global Lock"));
|
|
}
|
|
}
|
|
|
|
return_UINT8(locked);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_release_global_lock
|
|
*
|
|
* PARAMETERS: locked_by_me - Return value from corresponding call to
|
|
* acquire_global_lock.
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Release the global lock if it is locked.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ex_release_global_lock(u8 locked_by_me)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_release_global_lock);
|
|
|
|
/* Only attempt unlock if the caller locked it */
|
|
|
|
if (locked_by_me) {
|
|
|
|
/* OK, now release the lock */
|
|
|
|
status = acpi_ev_release_global_lock();
|
|
if (ACPI_FAILURE(status)) {
|
|
|
|
/* Report the error, but there isn't much else we can do */
|
|
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Could not release ACPI Global Lock"));
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_digits_needed
|
|
*
|
|
* PARAMETERS: Value - Value to be represented
|
|
* Base - Base of representation
|
|
*
|
|
* RETURN: The number of digits.
|
|
*
|
|
* DESCRIPTION: Calculate the number of digits needed to represent the Value
|
|
* in the given Base (Radix)
|
|
*
|
|
******************************************************************************/
|
|
|
|
static u32 acpi_ex_digits_needed(acpi_integer value, u32 base)
|
|
{
|
|
u32 num_digits;
|
|
acpi_integer current_value;
|
|
|
|
ACPI_FUNCTION_TRACE(ex_digits_needed);
|
|
|
|
/* acpi_integer is unsigned, so we don't worry about a '-' prefix */
|
|
|
|
if (value == 0) {
|
|
return_UINT32(1);
|
|
}
|
|
|
|
current_value = value;
|
|
num_digits = 0;
|
|
|
|
/* Count the digits in the requested base */
|
|
|
|
while (current_value) {
|
|
(void)acpi_ut_short_divide(current_value, base, ¤t_value,
|
|
NULL);
|
|
num_digits++;
|
|
}
|
|
|
|
return_UINT32(num_digits);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_eisa_id_to_string
|
|
*
|
|
* PARAMETERS: numeric_id - EISA ID to be converted
|
|
* out_string - Where to put the converted string (8 bytes)
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Convert a numeric EISA ID to string representation
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ex_eisa_id_to_string(u32 numeric_id, char *out_string)
|
|
{
|
|
u32 eisa_id;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Swap ID to big-endian to get contiguous bits */
|
|
|
|
eisa_id = acpi_ut_dword_byte_swap(numeric_id);
|
|
|
|
out_string[0] = (char)('@' + (((unsigned long)eisa_id >> 26) & 0x1f));
|
|
out_string[1] = (char)('@' + ((eisa_id >> 21) & 0x1f));
|
|
out_string[2] = (char)('@' + ((eisa_id >> 16) & 0x1f));
|
|
out_string[3] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 12);
|
|
out_string[4] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 8);
|
|
out_string[5] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 4);
|
|
out_string[6] = acpi_ut_hex_to_ascii_char((acpi_integer) eisa_id, 0);
|
|
out_string[7] = 0;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ex_unsigned_integer_to_string
|
|
*
|
|
* PARAMETERS: Value - Value to be converted
|
|
* out_string - Where to put the converted string (8 bytes)
|
|
*
|
|
* RETURN: None, string
|
|
*
|
|
* DESCRIPTION: Convert a number to string representation. Assumes string
|
|
* buffer is large enough to hold the string.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ex_unsigned_integer_to_string(acpi_integer value, char *out_string)
|
|
{
|
|
u32 count;
|
|
u32 digits_needed;
|
|
u32 remainder;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
digits_needed = acpi_ex_digits_needed(value, 10);
|
|
out_string[digits_needed] = 0;
|
|
|
|
for (count = digits_needed; count > 0; count--) {
|
|
(void)acpi_ut_short_divide(value, 10, &value, &remainder);
|
|
out_string[count - 1] = (char)('0' + remainder);
|
|
}
|
|
}
|
|
|
|
#endif
|