linux/drivers/acpi/parser/psloop.c

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ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 04:00:00 +00:00
/******************************************************************************
*
* Module Name: psloop - Main AML parse loop
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, 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.
*/
/*
* Parse the AML and build an operation tree as most interpreters,
* like Perl, do. Parsing is done by hand rather than with a YACC
* generated parser to tightly constrain stack and dynamic memory
* usage. At the same time, parsing is kept flexible and the code
* fairly compact by parsing based on a list of AML opcode
* templates in aml_op_info[]
*/
#include <acpi/acpi.h>
#include <acpi/acparser.h>
#include <acpi/acdispat.h>
#include <acpi/amlcode.h>
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME ("psloop")
static u32 acpi_gbl_depth = 0;
/*******************************************************************************
*
* FUNCTION: acpi_ps_parse_loop
*
* PARAMETERS: walk_state - Current state
*
* RETURN: Status
*
* DESCRIPTION: Parse AML (pointed to by the current parser state) and return
* a tree of ops.
*
******************************************************************************/
acpi_status
acpi_ps_parse_loop (
struct acpi_walk_state *walk_state)
{
acpi_status status = AE_OK;
acpi_status status2;
union acpi_parse_object *op = NULL; /* current op */
union acpi_parse_object *arg = NULL;
union acpi_parse_object *pre_op = NULL;
struct acpi_parse_state *parser_state;
u8 *aml_op_start = NULL;
ACPI_FUNCTION_TRACE_PTR ("ps_parse_loop", walk_state);
if (walk_state->descending_callback == NULL) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
parser_state = &walk_state->parser_state;
walk_state->arg_types = 0;
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) {
/* We are restarting a preempted control method */
if (acpi_ps_has_completed_scope (parser_state)) {
/*
* We must check if a predicate to an IF or WHILE statement
* was just completed
*/
if ((parser_state->scope->parse_scope.op) &&
((parser_state->scope->parse_scope.op->common.aml_opcode == AML_IF_OP) ||
(parser_state->scope->parse_scope.op->common.aml_opcode == AML_WHILE_OP)) &&
(walk_state->control_state) &&
(walk_state->control_state->common.state ==
ACPI_CONTROL_PREDICATE_EXECUTING)) {
/*
* A predicate was just completed, get the value of the
* predicate and branch based on that value
*/
walk_state->op = NULL;
status = acpi_ds_get_predicate_value (walk_state, ACPI_TO_POINTER (TRUE));
if (ACPI_FAILURE (status) &&
((status & AE_CODE_MASK) != AE_CODE_CONTROL)) {
if (status == AE_AML_NO_RETURN_VALUE) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invoked method did not return a value, %s\n",
acpi_format_exception (status)));
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"get_predicate Failed, %s\n",
acpi_format_exception (status)));
return_ACPI_STATUS (status);
}
status = acpi_ps_next_parse_state (walk_state, op, status);
}
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
}
else if (walk_state->prev_op) {
/* We were in the middle of an op */
op = walk_state->prev_op;
walk_state->arg_types = walk_state->prev_arg_types;
}
}
#endif
/* Iterative parsing loop, while there is more AML to process: */
while ((parser_state->aml < parser_state->aml_end) || (op)) {
aml_op_start = parser_state->aml;
if (!op) {
/* Get the next opcode from the AML stream */
walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
parser_state->aml_start);
walk_state->opcode = acpi_ps_peek_opcode (parser_state);
/*
* First cut to determine what we have found:
* 1) A valid AML opcode
* 2) A name string
* 3) An unknown/invalid opcode
*/
walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
switch (walk_state->op_info->class) {
case AML_CLASS_ASCII:
case AML_CLASS_PREFIX:
/*
* Starts with a valid prefix or ASCII char, this is a name
* string. Convert the bare name string to a namepath.
*/
walk_state->opcode = AML_INT_NAMEPATH_OP;
walk_state->arg_types = ARGP_NAMESTRING;
break;
case AML_CLASS_UNKNOWN:
/* The opcode is unrecognized. Just skip unknown opcodes */
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Found unknown opcode %X at AML address %p offset %X, ignoring\n",
walk_state->opcode, parser_state->aml, walk_state->aml_offset));
ACPI_DUMP_BUFFER (parser_state->aml, 128);
/* Assume one-byte bad opcode */
parser_state->aml++;
continue;
default:
/* Found opcode info, this is a normal opcode */
parser_state->aml += acpi_ps_get_opcode_size (walk_state->opcode);
walk_state->arg_types = walk_state->op_info->parse_args;
break;
}
/* Create Op structure and append to parent's argument list */
if (walk_state->op_info->flags & AML_NAMED) {
/* Allocate a new pre_op if necessary */
if (!pre_op) {
pre_op = acpi_ps_alloc_op (walk_state->opcode);
if (!pre_op) {
status = AE_NO_MEMORY;
goto close_this_op;
}
}
pre_op->common.value.arg = NULL;
pre_op->common.aml_opcode = walk_state->opcode;
/*
* Get and append arguments until we find the node that contains
* the name (the type ARGP_NAME).
*/
while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
(GET_CURRENT_ARG_TYPE (walk_state->arg_types) != ARGP_NAME)) {
status = acpi_ps_get_next_arg (walk_state, parser_state,
GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
if (ACPI_FAILURE (status)) {
goto close_this_op;
}
acpi_ps_append_arg (pre_op, arg);
INCREMENT_ARG_LIST (walk_state->arg_types);
}
/*
* Make sure that we found a NAME and didn't run out of
* arguments
*/
if (!GET_CURRENT_ARG_TYPE (walk_state->arg_types)) {
status = AE_AML_NO_OPERAND;
goto close_this_op;
}
/* We know that this arg is a name, move to next arg */
INCREMENT_ARG_LIST (walk_state->arg_types);
/*
* Find the object. This will either insert the object into
* the namespace or simply look it up
*/
walk_state->op = NULL;
status = walk_state->descending_callback (walk_state, &op);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"During name lookup/catalog, %s\n",
acpi_format_exception (status)));
goto close_this_op;
}
if (!op) {
continue;
}
status = acpi_ps_next_parse_state (walk_state, op, status);
if (status == AE_CTRL_PENDING) {
status = AE_OK;
goto close_this_op;
}
if (ACPI_FAILURE (status)) {
goto close_this_op;
}
acpi_ps_append_arg (op, pre_op->common.value.arg);
acpi_gbl_depth++;
if (op->common.aml_opcode == AML_REGION_OP) {
/*
* Defer final parsing of an operation_region body,
* because we don't have enough info in the first pass
* to parse it correctly (i.e., there may be method
* calls within the term_arg elements of the body.)
*
* However, we must continue parsing because
* the opregion is not a standalone package --
* we don't know where the end is at this point.
*
* (Length is unknown until parse of the body complete)
*/
op->named.data = aml_op_start;
op->named.length = 0;
}
}
else {
/* Not a named opcode, just allocate Op and append to parent */
walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
op = acpi_ps_alloc_op (walk_state->opcode);
if (!op) {
status = AE_NO_MEMORY;
goto close_this_op;
}
if (walk_state->op_info->flags & AML_CREATE) {
/*
* Backup to beginning of create_xXXfield declaration
* body_length is unknown until we parse the body
*/
op->named.data = aml_op_start;
op->named.length = 0;
}
acpi_ps_append_arg (acpi_ps_get_parent_scope (parser_state), op);
if ((walk_state->descending_callback != NULL)) {
/*
* Find the object. This will either insert the object into
* the namespace or simply look it up
*/
walk_state->op = op;
status = walk_state->descending_callback (walk_state, &op);
status = acpi_ps_next_parse_state (walk_state, op, status);
if (status == AE_CTRL_PENDING) {
status = AE_OK;
goto close_this_op;
}
if (ACPI_FAILURE (status)) {
goto close_this_op;
}
}
}
op->common.aml_offset = walk_state->aml_offset;
if (walk_state->op_info) {
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
"Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n",
(u32) op->common.aml_opcode, walk_state->op_info->name,
op, parser_state->aml, op->common.aml_offset));
}
}
/*
* Start arg_count at zero because we don't know if there are
* any args yet
*/
walk_state->arg_count = 0;
/* Are there any arguments that must be processed? */
if (walk_state->arg_types) {
/* Get arguments */
switch (op->common.aml_opcode) {
case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
case AML_WORD_OP: /* AML_WORDDATA_ARG */
case AML_DWORD_OP: /* AML_DWORDATA_ARG */
case AML_QWORD_OP: /* AML_QWORDATA_ARG */
case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */
/* Fill in constant or string argument directly */
acpi_ps_get_next_simple_arg (parser_state,
GET_CURRENT_ARG_TYPE (walk_state->arg_types), op);
break;
case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */
status = acpi_ps_get_next_namepath (walk_state, parser_state, op, 1);
if (ACPI_FAILURE (status)) {
goto close_this_op;
}
walk_state->arg_types = 0;
break;
default:
/*
* Op is not a constant or string, append each argument
* to the Op
*/
while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
!walk_state->arg_count) {
walk_state->aml_offset = (u32)
ACPI_PTR_DIFF (parser_state->aml, parser_state->aml_start);
status = acpi_ps_get_next_arg (walk_state, parser_state,
GET_CURRENT_ARG_TYPE (walk_state->arg_types),
&arg);
if (ACPI_FAILURE (status)) {
goto close_this_op;
}
if (arg) {
arg->common.aml_offset = walk_state->aml_offset;
acpi_ps_append_arg (op, arg);
}
INCREMENT_ARG_LIST (walk_state->arg_types);
}
ACPICA 20050708 from Bob Moore <robert.moore@intel.com> The use of the CPU stack in the debug version of the subsystem has been considerably reduced. Previously, a debug structure was declared in every function that used the debug macros. This structure has been removed in favor of declaring the individual elements as parameters to the debug functions. This reduces the cumulative stack use during nested execution of ACPI function calls at the cost of a small increase in the code size of the debug version of the subsystem. With assistance from Alexey Starikovskiy and Len Brown. Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent headers to define a macro that will return the current function name at runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the compiler-dependent header, the function name is saved on the CPU stack (one pointer per function.) This mechanism is used because apparently there exists no standard ANSI-C defined macro that that returns the function name. Alexey Starikovskiy redesigned and reimplemented the "Owner ID" mechanism used to track namespace objects created/deleted by ACPI tables and control method execution. A bitmap is now used to allocate and free the IDs, thus solving the wraparound problem present in the previous implementation. The size of the namespace node descriptor was reduced by 2 bytes as a result. Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield flag definitions within the headers for the predefined ACPI tables. These have been replaced by UINT8_BIT in order to increase the code portability of the subsystem. If the use of UINT8 remains a problem, we may be forced to eliminate bitfields entirely because of a lack of portability. Alexey Starikovksiy enhanced the performance of acpi_ut_update_object_reference. This is a frequently used function and this improvement increases the performance of the entire subsystem. Alexey Starikovskiy fixed several possible memory leaks and the inverse - premature object deletion. Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-08 04:00:00 +00:00
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 04:00:00 +00:00
/* Special processing for certain opcodes */
ACPICA 20050708 from Bob Moore <robert.moore@intel.com> The use of the CPU stack in the debug version of the subsystem has been considerably reduced. Previously, a debug structure was declared in every function that used the debug macros. This structure has been removed in favor of declaring the individual elements as parameters to the debug functions. This reduces the cumulative stack use during nested execution of ACPI function calls at the cost of a small increase in the code size of the debug version of the subsystem. With assistance from Alexey Starikovskiy and Len Brown. Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent headers to define a macro that will return the current function name at runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the compiler-dependent header, the function name is saved on the CPU stack (one pointer per function.) This mechanism is used because apparently there exists no standard ANSI-C defined macro that that returns the function name. Alexey Starikovskiy redesigned and reimplemented the "Owner ID" mechanism used to track namespace objects created/deleted by ACPI tables and control method execution. A bitmap is now used to allocate and free the IDs, thus solving the wraparound problem present in the previous implementation. The size of the namespace node descriptor was reduced by 2 bytes as a result. Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield flag definitions within the headers for the predefined ACPI tables. These have been replaced by UINT8_BIT in order to increase the code portability of the subsystem. If the use of UINT8 remains a problem, we may be forced to eliminate bitfields entirely because of a lack of portability. Alexey Starikovksiy enhanced the performance of acpi_ut_update_object_reference. This is a frequently used function and this improvement increases the performance of the entire subsystem. Alexey Starikovskiy fixed several possible memory leaks and the inverse - premature object deletion. Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-08 04:00:00 +00:00
/* TBD (remove): Temporary mechanism to disable this code if needed */
#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
ACPICA 20050708 from Bob Moore <robert.moore@intel.com> The use of the CPU stack in the debug version of the subsystem has been considerably reduced. Previously, a debug structure was declared in every function that used the debug macros. This structure has been removed in favor of declaring the individual elements as parameters to the debug functions. This reduces the cumulative stack use during nested execution of ACPI function calls at the cost of a small increase in the code size of the debug version of the subsystem. With assistance from Alexey Starikovskiy and Len Brown. Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent headers to define a macro that will return the current function name at runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the compiler-dependent header, the function name is saved on the CPU stack (one pointer per function.) This mechanism is used because apparently there exists no standard ANSI-C defined macro that that returns the function name. Alexey Starikovskiy redesigned and reimplemented the "Owner ID" mechanism used to track namespace objects created/deleted by ACPI tables and control method execution. A bitmap is now used to allocate and free the IDs, thus solving the wraparound problem present in the previous implementation. The size of the namespace node descriptor was reduced by 2 bytes as a result. Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield flag definitions within the headers for the predefined ACPI tables. These have been replaced by UINT8_BIT in order to increase the code portability of the subsystem. If the use of UINT8 remains a problem, we may be forced to eliminate bitfields entirely because of a lack of portability. Alexey Starikovksiy enhanced the performance of acpi_ut_update_object_reference. This is a frequently used function and this improvement increases the performance of the entire subsystem. Alexey Starikovskiy fixed several possible memory leaks and the inverse - premature object deletion. Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-08 04:00:00 +00:00
if ((walk_state->pass_number <= ACPI_IMODE_LOAD_PASS1) &&
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 04:00:00 +00:00
((walk_state->parse_flags & ACPI_PARSE_DISASSEMBLE) == 0)) {
/*
* We want to skip If/Else/While constructs during Pass1
* because we want to actually conditionally execute the
* code during Pass2.
*
* Except for disassembly, where we always want to
* walk the If/Else/While packages
*/
switch (op->common.aml_opcode) {
case AML_IF_OP:
case AML_ELSE_OP:
case AML_WHILE_OP:
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
"Pass1: Skipping an If/Else/While body\n"));
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 04:00:00 +00:00
/* Skip body of if/else/while in pass 1 */
parser_state->aml = parser_state->pkg_end;
walk_state->arg_count = 0;
break;
default:
break;
}
}
ACPICA 20050708 from Bob Moore <robert.moore@intel.com> The use of the CPU stack in the debug version of the subsystem has been considerably reduced. Previously, a debug structure was declared in every function that used the debug macros. This structure has been removed in favor of declaring the individual elements as parameters to the debug functions. This reduces the cumulative stack use during nested execution of ACPI function calls at the cost of a small increase in the code size of the debug version of the subsystem. With assistance from Alexey Starikovskiy and Len Brown. Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent headers to define a macro that will return the current function name at runtime (such as __FUNCTION__ or _func_, etc.) The function name is used by the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the compiler-dependent header, the function name is saved on the CPU stack (one pointer per function.) This mechanism is used because apparently there exists no standard ANSI-C defined macro that that returns the function name. Alexey Starikovskiy redesigned and reimplemented the "Owner ID" mechanism used to track namespace objects created/deleted by ACPI tables and control method execution. A bitmap is now used to allocate and free the IDs, thus solving the wraparound problem present in the previous implementation. The size of the namespace node descriptor was reduced by 2 bytes as a result. Removed the UINT32_BIT and UINT16_BIT types that were used for the bitfield flag definitions within the headers for the predefined ACPI tables. These have been replaced by UINT8_BIT in order to increase the code portability of the subsystem. If the use of UINT8 remains a problem, we may be forced to eliminate bitfields entirely because of a lack of portability. Alexey Starikovksiy enhanced the performance of acpi_ut_update_object_reference. This is a frequently used function and this improvement increases the performance of the entire subsystem. Alexey Starikovskiy fixed several possible memory leaks and the inverse - premature object deletion. Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-08 04:00:00 +00:00
#endif
ACPICA 20050617-0624 from Bob Moore <robert.moore@intel.com> ACPICA 20050617: Moved the object cache operations into the OS interface layer (OSL) to allow the host OS to handle these operations if desired (for example, the Linux OSL will invoke the slab allocator). This support is optional; the compile time define ACPI_USE_LOCAL_CACHE may be used to utilize the original cache code in the ACPI CA core. The new OSL interfaces are shown below. See utalloc.c for an example implementation, and acpiosxf.h for the exact interface definitions. Thanks to Alexey Starikovskiy. acpi_os_create_cache acpi_os_delete_cache acpi_os_purge_cache acpi_os_acquire_object acpi_os_release_object Modified the interfaces to acpi_os_acquire_lock and acpi_os_release_lock to return and restore a flags parameter. This fits better with many OS lock models. Note: the current execution state (interrupt handler or not) is no longer passed to these interfaces. If necessary, the OSL must determine this state by itself, a simple and fast operation. Thanks to Alexey Starikovskiy. Fixed a problem in the ACPI table handling where a valid XSDT was assumed present if the revision of the RSDP was 2 or greater. According to the ACPI specification, the XSDT is optional in all cases, and the table manager therefore now checks for both an RSDP >=2 and a valid XSDT pointer. Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs contain only the RSDT. Fixed an interpreter problem with the Mid() operator in the case of an input string where the resulting output string is of zero length. It now correctly returns a valid, null terminated string object instead of a string object with a null pointer. Fixed a problem with the control method argument handling to allow a store to an Arg object that already contains an object of type Device. The Device object is now correctly overwritten. Previously, an error was returned. ACPICA 20050624: Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for the host-defined cache object. This allows the OSL implementation to define and type this object in any manner desired, simplifying the OSL implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for Linux, and should be defined in the OS-specific header file for other operating systems as required. Changed the interface to AcpiOsAcquireObject to directly return the requested object as the function return (instead of ACPI_STATUS.) This change was made for performance reasons, since this is the purpose of the interface in the first place. acpi_os_acquire_object is now similar to the acpi_os_allocate interface. Thanks to Alexey Starikovskiy. Modified the initialization sequence in acpi_initialize_subsystem to call the OSL interface acpi_osl_initialize first, before any local initialization. This change was required because the global initialization now calls OSL interfaces. Restructured the code base to split some files because of size and/or because the code logically belonged in a separate file. New files are listed below. utilities/utcache.c /* Local cache interfaces */ utilities/utmutex.c /* Local mutex support */ utilities/utstate.c /* State object support */ parser/psloop.c /* Main AML parse loop */ Signed-off-by: Len Brown <len.brown@intel.com>
2005-06-24 04:00:00 +00:00
switch (op->common.aml_opcode) {
case AML_METHOD_OP:
/*
* Skip parsing of control method
* because we don't have enough info in the first pass
* to parse it correctly.
*
* Save the length and address of the body
*/
op->named.data = parser_state->aml;
op->named.length = (u32) (parser_state->pkg_end -
parser_state->aml);
/* Skip body of method */
parser_state->aml = parser_state->pkg_end;
walk_state->arg_count = 0;
break;
case AML_BUFFER_OP:
case AML_PACKAGE_OP:
case AML_VAR_PACKAGE_OP:
if ((op->common.parent) &&
(op->common.parent->common.aml_opcode == AML_NAME_OP) &&
(walk_state->pass_number <= ACPI_IMODE_LOAD_PASS2)) {
/*
* Skip parsing of Buffers and Packages
* because we don't have enough info in the first pass
* to parse them correctly.
*/
op->named.data = aml_op_start;
op->named.length = (u32) (parser_state->pkg_end -
aml_op_start);
/* Skip body */
parser_state->aml = parser_state->pkg_end;
walk_state->arg_count = 0;
}
break;
case AML_WHILE_OP:
if (walk_state->control_state) {
walk_state->control_state->control.package_end =
parser_state->pkg_end;
}
break;
default:
/* No action for all other opcodes */
break;
}
break;
}
}
/* Check for arguments that need to be processed */
if (walk_state->arg_count) {
/*
* There are arguments (complex ones), push Op and
* prepare for argument
*/
status = acpi_ps_push_scope (parser_state, op,
walk_state->arg_types, walk_state->arg_count);
if (ACPI_FAILURE (status)) {
goto close_this_op;
}
op = NULL;
continue;
}
/*
* All arguments have been processed -- Op is complete,
* prepare for next
*/
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
if (walk_state->op_info->flags & AML_NAMED) {
if (acpi_gbl_depth) {
acpi_gbl_depth--;
}
if (op->common.aml_opcode == AML_REGION_OP) {
/*
* Skip parsing of control method or opregion body,
* because we don't have enough info in the first pass
* to parse them correctly.
*
* Completed parsing an op_region declaration, we now
* know the length.
*/
op->named.length = (u32) (parser_state->aml - op->named.data);
}
}
if (walk_state->op_info->flags & AML_CREATE) {
/*
* Backup to beginning of create_xXXfield declaration (1 for
* Opcode)
*
* body_length is unknown until we parse the body
*/
op->named.length = (u32) (parser_state->aml - op->named.data);
}
/* This op complete, notify the dispatcher */
if (walk_state->ascending_callback != NULL) {
walk_state->op = op;
walk_state->opcode = op->common.aml_opcode;
status = walk_state->ascending_callback (walk_state);
status = acpi_ps_next_parse_state (walk_state, op, status);
if (status == AE_CTRL_PENDING) {
status = AE_OK;
goto close_this_op;
}
}
close_this_op:
/*
* Finished one argument of the containing scope
*/
parser_state->scope->parse_scope.arg_count--;
/* Finished with pre_op */
if (pre_op) {
acpi_ps_free_op (pre_op);
pre_op = NULL;
}
/* Close this Op (will result in parse subtree deletion) */
status2 = acpi_ps_complete_this_op (walk_state, op);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
op = NULL;
switch (status) {
case AE_OK:
break;
case AE_CTRL_TRANSFER:
/* We are about to transfer to a called method. */
walk_state->prev_op = op;
walk_state->prev_arg_types = walk_state->arg_types;
return_ACPI_STATUS (status);
case AE_CTRL_END:
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
if (op) {
walk_state->op = op;
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
walk_state->opcode = op->common.aml_opcode;
status = walk_state->ascending_callback (walk_state);
status = acpi_ps_next_parse_state (walk_state, op, status);
status2 = acpi_ps_complete_this_op (walk_state, op);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
op = NULL;
}
status = AE_OK;
break;
case AE_CTRL_BREAK:
case AE_CTRL_CONTINUE:
/* Pop off scopes until we find the While */
while (!op || (op->common.aml_opcode != AML_WHILE_OP)) {
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
}
/* Close this iteration of the While loop */
walk_state->op = op;
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
walk_state->opcode = op->common.aml_opcode;
status = walk_state->ascending_callback (walk_state);
status = acpi_ps_next_parse_state (walk_state, op, status);
status2 = acpi_ps_complete_this_op (walk_state, op);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
op = NULL;
status = AE_OK;
break;
case AE_CTRL_TERMINATE:
status = AE_OK;
/* Clean up */
do {
if (op) {
status2 = acpi_ps_complete_this_op (walk_state, op);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
}
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
} while (op);
return_ACPI_STATUS (status);
default: /* All other non-AE_OK status */
do {
if (op) {
status2 = acpi_ps_complete_this_op (walk_state, op);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
}
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
} while (op);
/*
* TBD: Cleanup parse ops on error
*/
#if 0
if (op == NULL) {
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
}
#endif
walk_state->prev_op = op;
walk_state->prev_arg_types = walk_state->arg_types;
return_ACPI_STATUS (status);
}
/* This scope complete? */
if (acpi_ps_has_completed_scope (parser_state)) {
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
}
else {
op = NULL;
}
} /* while parser_state->Aml */
/*
* Complete the last Op (if not completed), and clear the scope stack.
* It is easily possible to end an AML "package" with an unbounded number
* of open scopes (such as when several ASL blocks are closed with
* sequential closing braces). We want to terminate each one cleanly.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", op));
do {
if (op) {
if (walk_state->ascending_callback != NULL) {
walk_state->op = op;
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
walk_state->opcode = op->common.aml_opcode;
status = walk_state->ascending_callback (walk_state);
status = acpi_ps_next_parse_state (walk_state, op, status);
if (status == AE_CTRL_PENDING) {
status = AE_OK;
goto close_this_op;
}
if (status == AE_CTRL_TERMINATE) {
status = AE_OK;
/* Clean up */
do {
if (op) {
status2 = acpi_ps_complete_this_op (walk_state, op);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
}
acpi_ps_pop_scope (parser_state, &op,
&walk_state->arg_types, &walk_state->arg_count);
} while (op);
return_ACPI_STATUS (status);
}
else if (ACPI_FAILURE (status)) {
/* First error is most important */
(void) acpi_ps_complete_this_op (walk_state, op);
return_ACPI_STATUS (status);
}
}
status2 = acpi_ps_complete_this_op (walk_state, op);
if (ACPI_FAILURE (status2)) {
return_ACPI_STATUS (status2);
}
}
acpi_ps_pop_scope (parser_state, &op, &walk_state->arg_types,
&walk_state->arg_count);
} while (op);
return_ACPI_STATUS (status);
}