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linux/drivers/acpi/utilities/utmisc.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore 
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

1532 lines
38 KiB
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/*******************************************************************************
*
* Module Name: utmisc - common utility procedures
*
******************************************************************************/
/*
* 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.
*/
#include <acpi/acpi.h>
#include <acpi/acnamesp.h>
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utmisc")
/* Local prototypes */
static acpi_status
acpi_ut_create_mutex (
acpi_mutex_handle mutex_id);
static acpi_status
acpi_ut_delete_mutex (
acpi_mutex_handle mutex_id);
/*******************************************************************************
*
* FUNCTION: acpi_ut_strupr (strupr)
*
* PARAMETERS: src_string - The source string to convert
*
* RETURN: Converted src_string (same as input pointer)
*
* DESCRIPTION: Convert string to uppercase
*
* NOTE: This is not a POSIX function, so it appears here, not in utclib.c
*
******************************************************************************/
char *
acpi_ut_strupr (
char *src_string)
{
char *string;
ACPI_FUNCTION_ENTRY ();
/* Walk entire string, uppercasing the letters */
for (string = src_string; *string; string++) {
*string = (char) ACPI_TOUPPER (*string);
}
return (src_string);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_print_string
*
* PARAMETERS: String - Null terminated ASCII string
* max_length - Maximum output length
*
* RETURN: None
*
* DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
* sequences.
*
******************************************************************************/
void
acpi_ut_print_string (
char *string,
u8 max_length)
{
u32 i;
if (!string) {
acpi_os_printf ("<\"NULL STRING PTR\">");
return;
}
acpi_os_printf ("\"");
for (i = 0; string[i] && (i < max_length); i++) {
/* Escape sequences */
switch (string[i]) {
case 0x07:
acpi_os_printf ("\\a"); /* BELL */
break;
case 0x08:
acpi_os_printf ("\\b"); /* BACKSPACE */
break;
case 0x0C:
acpi_os_printf ("\\f"); /* FORMFEED */
break;
case 0x0A:
acpi_os_printf ("\\n"); /* LINEFEED */
break;
case 0x0D:
acpi_os_printf ("\\r"); /* CARRIAGE RETURN*/
break;
case 0x09:
acpi_os_printf ("\\t"); /* HORIZONTAL TAB */
break;
case 0x0B:
acpi_os_printf ("\\v"); /* VERTICAL TAB */
break;
case '\'': /* Single Quote */
case '\"': /* Double Quote */
case '\\': /* Backslash */
acpi_os_printf ("\\%c", (int) string[i]);
break;
default:
/* Check for printable character or hex escape */
if (ACPI_IS_PRINT (string[i]))
{
/* This is a normal character */
acpi_os_printf ("%c", (int) string[i]);
}
else
{
/* All others will be Hex escapes */
acpi_os_printf ("\\x%2.2X", (s32) string[i]);
}
break;
}
}
acpi_os_printf ("\"");
if (i == max_length && string[i]) {
acpi_os_printf ("...");
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_dword_byte_swap
*
* PARAMETERS: Value - Value to be converted
*
* RETURN: u32 integer with bytes swapped
*
* DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
*
******************************************************************************/
u32
acpi_ut_dword_byte_swap (
u32 value)
{
union {
u32 value;
u8 bytes[4];
} out;
union {
u32 value;
u8 bytes[4];
} in;
ACPI_FUNCTION_ENTRY ();
in.value = value;
out.bytes[0] = in.bytes[3];
out.bytes[1] = in.bytes[2];
out.bytes[2] = in.bytes[1];
out.bytes[3] = in.bytes[0];
return (out.value);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_set_integer_width
*
* PARAMETERS: Revision From DSDT header
*
* RETURN: None
*
* DESCRIPTION: Set the global integer bit width based upon the revision
* of the DSDT. For Revision 1 and 0, Integers are 32 bits.
* For Revision 2 and above, Integers are 64 bits. Yes, this
* makes a difference.
*
******************************************************************************/
void
acpi_ut_set_integer_width (
u8 revision)
{
if (revision <= 1) {
acpi_gbl_integer_bit_width = 32;
acpi_gbl_integer_nybble_width = 8;
acpi_gbl_integer_byte_width = 4;
}
else {
acpi_gbl_integer_bit_width = 64;
acpi_gbl_integer_nybble_width = 16;
acpi_gbl_integer_byte_width = 8;
}
}
#ifdef ACPI_DEBUG_OUTPUT
/*******************************************************************************
*
* FUNCTION: acpi_ut_display_init_pathname
*
* PARAMETERS: Type - Object type of the node
* obj_handle - Handle whose pathname will be displayed
* Path - Additional path string to be appended.
* (NULL if no extra path)
*
* RETURN: acpi_status
*
* DESCRIPTION: Display full pathname of an object, DEBUG ONLY
*
******************************************************************************/
void
acpi_ut_display_init_pathname (
u8 type,
struct acpi_namespace_node *obj_handle,
char *path)
{
acpi_status status;
struct acpi_buffer buffer;
ACPI_FUNCTION_ENTRY ();
/* Only print the path if the appropriate debug level is enabled */
if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
return;
}
/* Get the full pathname to the node */
buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
status = acpi_ns_handle_to_pathname (obj_handle, &buffer);
if (ACPI_FAILURE (status)) {
return;
}
/* Print what we're doing */
switch (type) {
case ACPI_TYPE_METHOD:
acpi_os_printf ("Executing ");
break;
default:
acpi_os_printf ("Initializing ");
break;
}
/* Print the object type and pathname */
acpi_os_printf ("%-12s %s",
acpi_ut_get_type_name (type), (char *) buffer.pointer);
/* Extra path is used to append names like _STA, _INI, etc. */
if (path) {
acpi_os_printf (".%s", path);
}
acpi_os_printf ("\n");
ACPI_MEM_FREE (buffer.pointer);
}
#endif
/*******************************************************************************
*
* FUNCTION: acpi_ut_valid_acpi_name
*
* PARAMETERS: Name - The name to be examined
*
* RETURN: TRUE if the name is valid, FALSE otherwise
*
* DESCRIPTION: Check for a valid ACPI name. Each character must be one of:
* 1) Upper case alpha
* 2) numeric
* 3) underscore
*
******************************************************************************/
u8
acpi_ut_valid_acpi_name (
u32 name)
{
char *name_ptr = (char *) &name;
char character;
acpi_native_uint i;
ACPI_FUNCTION_ENTRY ();
for (i = 0; i < ACPI_NAME_SIZE; i++) {
character = *name_ptr;
name_ptr++;
if (!((character == '_') ||
(character >= 'A' && character <= 'Z') ||
(character >= '0' && character <= '9'))) {
return (FALSE);
}
}
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_valid_acpi_character
*
* PARAMETERS: Character - The character to be examined
*
* RETURN: 1 if Character may appear in a name, else 0
*
* DESCRIPTION: Check for a printable character
*
******************************************************************************/
u8
acpi_ut_valid_acpi_character (
char character)
{
ACPI_FUNCTION_ENTRY ();
return ((u8) ((character == '_') ||
(character >= 'A' && character <= 'Z') ||
(character >= '0' && character <= '9')));
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_strtoul64
*
* PARAMETERS: String - Null terminated string
* Base - Radix of the string: 10, 16, or ACPI_ANY_BASE
* ret_integer - Where the converted integer is returned
*
* RETURN: Status and Converted value
*
* DESCRIPTION: Convert a string into an unsigned value.
* NOTE: Does not support Octal strings, not needed.
*
******************************************************************************/
acpi_status
acpi_ut_strtoul64 (
char *string,
u32 base,
acpi_integer *ret_integer)
{
u32 this_digit = 0;
acpi_integer return_value = 0;
acpi_integer quotient;
ACPI_FUNCTION_TRACE ("ut_stroul64");
if ((!string) || !(*string)) {
goto error_exit;
}
switch (base) {
case ACPI_ANY_BASE:
case 10:
case 16:
break;
default:
/* Invalid Base */
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Skip over any white space in the buffer */
while (ACPI_IS_SPACE (*string) || *string == '\t') {
string++;
}
/*
* If the input parameter Base is zero, then we need to
* determine if it is decimal or hexadecimal:
*/
if (base == 0) {
if ((*string == '0') &&
(ACPI_TOLOWER (*(string + 1)) == 'x')) {
base = 16;
string += 2;
}
else {
base = 10;
}
}
/*
* For hexadecimal base, skip over the leading
* 0 or 0x, if they are present.
*/
if ((base == 16) &&
(*string == '0') &&
(ACPI_TOLOWER (*(string + 1)) == 'x')) {
string += 2;
}
/* Any string left? */
if (!(*string)) {
goto error_exit;
}
/* Main loop: convert the string to a 64-bit integer */
while (*string) {
if (ACPI_IS_DIGIT (*string)) {
/* Convert ASCII 0-9 to Decimal value */
this_digit = ((u8) *string) - '0';
}
else {
if (base == 10) {
/* Digit is out of range */
goto error_exit;
}
this_digit = (u8) ACPI_TOUPPER (*string);
if (ACPI_IS_XDIGIT ((char) this_digit)) {
/* Convert ASCII Hex char to value */
this_digit = this_digit - 'A' + 10;
}
else {
/*
* We allow non-hex chars, just stop now, same as end-of-string.
* See ACPI spec, string-to-integer conversion.
*/
break;
}
}
/* Divide the digit into the correct position */
(void) acpi_ut_short_divide ((ACPI_INTEGER_MAX - (acpi_integer) this_digit),
base, &quotient, NULL);
if (return_value > quotient) {
goto error_exit;
}
return_value *= base;
return_value += this_digit;
string++;
}
/* All done, normal exit */
*ret_integer = return_value;
return_ACPI_STATUS (AE_OK);
error_exit:
/* Base was set/validated above */
if (base == 10) {
return_ACPI_STATUS (AE_BAD_DECIMAL_CONSTANT);
}
else {
return_ACPI_STATUS (AE_BAD_HEX_CONSTANT);
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_mutex_initialize
*
* PARAMETERS: None.
*
* RETURN: Status
*
* DESCRIPTION: Create the system mutex objects.
*
******************************************************************************/
acpi_status
acpi_ut_mutex_initialize (
void)
{
u32 i;
acpi_status status;
ACPI_FUNCTION_TRACE ("ut_mutex_initialize");
/*
* Create each of the predefined mutex objects
*/
for (i = 0; i < NUM_MUTEX; i++) {
status = acpi_ut_create_mutex (i);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
status = acpi_os_create_lock (&acpi_gbl_gpe_lock);
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_mutex_terminate
*
* PARAMETERS: None.
*
* RETURN: None.
*
* DESCRIPTION: Delete all of the system mutex objects.
*
******************************************************************************/
void
acpi_ut_mutex_terminate (
void)
{
u32 i;
ACPI_FUNCTION_TRACE ("ut_mutex_terminate");
/*
* Delete each predefined mutex object
*/
for (i = 0; i < NUM_MUTEX; i++) {
(void) acpi_ut_delete_mutex (i);
}
acpi_os_delete_lock (acpi_gbl_gpe_lock);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_mutex
*
* PARAMETERS: mutex_iD - ID of the mutex to be created
*
* RETURN: Status
*
* DESCRIPTION: Create a mutex object.
*
******************************************************************************/
static acpi_status
acpi_ut_create_mutex (
acpi_mutex_handle mutex_id)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE_U32 ("ut_create_mutex", mutex_id);
if (mutex_id > MAX_MUTEX) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (!acpi_gbl_mutex_info[mutex_id].mutex) {
status = acpi_os_create_semaphore (1, 1,
&acpi_gbl_mutex_info[mutex_id].mutex);
acpi_gbl_mutex_info[mutex_id].owner_id = ACPI_MUTEX_NOT_ACQUIRED;
acpi_gbl_mutex_info[mutex_id].use_count = 0;
}
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_delete_mutex
*
* PARAMETERS: mutex_iD - ID of the mutex to be deleted
*
* RETURN: Status
*
* DESCRIPTION: Delete a mutex object.
*
******************************************************************************/
static acpi_status
acpi_ut_delete_mutex (
acpi_mutex_handle mutex_id)
{
acpi_status status;
ACPI_FUNCTION_TRACE_U32 ("ut_delete_mutex", mutex_id);
if (mutex_id > MAX_MUTEX) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
status = acpi_os_delete_semaphore (acpi_gbl_mutex_info[mutex_id].mutex);
acpi_gbl_mutex_info[mutex_id].mutex = NULL;
acpi_gbl_mutex_info[mutex_id].owner_id = ACPI_MUTEX_NOT_ACQUIRED;
return_ACPI_STATUS (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_acquire_mutex
*
* PARAMETERS: mutex_iD - ID of the mutex to be acquired
*
* RETURN: Status
*
* DESCRIPTION: Acquire a mutex object.
*
******************************************************************************/
acpi_status
acpi_ut_acquire_mutex (
acpi_mutex_handle mutex_id)
{
acpi_status status;
u32 this_thread_id;
ACPI_FUNCTION_NAME ("ut_acquire_mutex");
if (mutex_id > MAX_MUTEX) {
return (AE_BAD_PARAMETER);
}
this_thread_id = acpi_os_get_thread_id ();
#ifdef ACPI_MUTEX_DEBUG
{
u32 i;
/*
* Mutex debug code, for internal debugging only.
*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than or equal to this one. If so, the thread has violated
* the mutex ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = mutex_id; i < MAX_MUTEX; i++) {
if (acpi_gbl_mutex_info[i].owner_id == this_thread_id) {
if (i == mutex_id) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Mutex [%s] already acquired by this thread [%X]\n",
acpi_ut_get_mutex_name (mutex_id), this_thread_id));
return (AE_ALREADY_ACQUIRED);
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invalid acquire order: Thread %X owns [%s], wants [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (i),
acpi_ut_get_mutex_name (mutex_id)));
return (AE_ACQUIRE_DEADLOCK);
}
}
}
#endif
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
"Thread %X attempting to acquire Mutex [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id)));
status = acpi_os_wait_semaphore (acpi_gbl_mutex_info[mutex_id].mutex,
1, ACPI_WAIT_FOREVER);
if (ACPI_SUCCESS (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %X acquired Mutex [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id)));
acpi_gbl_mutex_info[mutex_id].use_count++;
acpi_gbl_mutex_info[mutex_id].owner_id = this_thread_id;
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Thread %X could not acquire Mutex [%s] %s\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id),
acpi_format_exception (status)));
}
return (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_release_mutex
*
* PARAMETERS: mutex_iD - ID of the mutex to be released
*
* RETURN: Status
*
* DESCRIPTION: Release a mutex object.
*
******************************************************************************/
acpi_status
acpi_ut_release_mutex (
acpi_mutex_handle mutex_id)
{
acpi_status status;
u32 i;
u32 this_thread_id;
ACPI_FUNCTION_NAME ("ut_release_mutex");
this_thread_id = acpi_os_get_thread_id ();
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
"Thread %X releasing Mutex [%s]\n", this_thread_id,
acpi_ut_get_mutex_name (mutex_id)));
if (mutex_id > MAX_MUTEX) {
return (AE_BAD_PARAMETER);
}
/*
* Mutex must be acquired in order to release it!
*/
if (acpi_gbl_mutex_info[mutex_id].owner_id == ACPI_MUTEX_NOT_ACQUIRED) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Mutex [%s] is not acquired, cannot release\n",
acpi_ut_get_mutex_name (mutex_id)));
return (AE_NOT_ACQUIRED);
}
/*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than this one. If so, the thread has violated the mutex
* ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = mutex_id; i < MAX_MUTEX; i++) {
if (acpi_gbl_mutex_info[i].owner_id == this_thread_id) {
if (i == mutex_id) {
continue;
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invalid release order: owns [%s], releasing [%s]\n",
acpi_ut_get_mutex_name (i), acpi_ut_get_mutex_name (mutex_id)));
return (AE_RELEASE_DEADLOCK);
}
}
/* Mark unlocked FIRST */
acpi_gbl_mutex_info[mutex_id].owner_id = ACPI_MUTEX_NOT_ACQUIRED;
status = acpi_os_signal_semaphore (acpi_gbl_mutex_info[mutex_id].mutex, 1);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Thread %X could not release Mutex [%s] %s\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id),
acpi_format_exception (status)));
}
else {
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %X released Mutex [%s]\n",
this_thread_id, acpi_ut_get_mutex_name (mutex_id)));
}
return (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_update_state_and_push
*
* PARAMETERS: Object - Object to be added to the new state
* Action - Increment/Decrement
* state_list - List the state will be added to
*
* RETURN: Status
*
* DESCRIPTION: Create a new state and push it
*
******************************************************************************/
acpi_status
acpi_ut_create_update_state_and_push (
union acpi_operand_object *object,
u16 action,
union acpi_generic_state **state_list)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY ();
/* Ignore null objects; these are expected */
if (!object) {
return (AE_OK);
}
state = acpi_ut_create_update_state (object, action);
if (!state) {
return (AE_NO_MEMORY);
}
acpi_ut_push_generic_state (state_list, state);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_pkg_state_and_push
*
* PARAMETERS: Object - Object to be added to the new state
* Action - Increment/Decrement
* state_list - List the state will be added to
*
* RETURN: Status
*
* DESCRIPTION: Create a new state and push it
*
******************************************************************************/
#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_ut_create_pkg_state_and_push (
void *internal_object,
void *external_object,
u16 index,
union acpi_generic_state **state_list)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY ();
state = acpi_ut_create_pkg_state (internal_object, external_object, index);
if (!state) {
return (AE_NO_MEMORY);
}
acpi_ut_push_generic_state (state_list, state);
return (AE_OK);
}
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* FUNCTION: acpi_ut_push_generic_state
*
* PARAMETERS: list_head - Head of the state stack
* State - State object to push
*
* RETURN: None
*
* DESCRIPTION: Push a state object onto a state stack
*
******************************************************************************/
void
acpi_ut_push_generic_state (
union acpi_generic_state **list_head,
union acpi_generic_state *state)
{
ACPI_FUNCTION_TRACE ("ut_push_generic_state");
/* Push the state object onto the front of the list (stack) */
state->common.next = *list_head;
*list_head = state;
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_pop_generic_state
*
* PARAMETERS: list_head - Head of the state stack
*
* RETURN: The popped state object
*
* DESCRIPTION: Pop a state object from a state stack
*
******************************************************************************/
union acpi_generic_state *
acpi_ut_pop_generic_state (
union acpi_generic_state **list_head)
{
union acpi_generic_state *state;
ACPI_FUNCTION_TRACE ("ut_pop_generic_state");
/* Remove the state object at the head of the list (stack) */
state = *list_head;
if (state) {
/* Update the list head */
*list_head = state->common.next;
}
return_PTR (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_generic_state
*
* PARAMETERS: None
*
* RETURN: The new state object. NULL on failure.
*
* DESCRIPTION: Create a generic state object. Attempt to obtain one from
* the global state cache; If none available, create a new one.
*
******************************************************************************/
union acpi_generic_state *
acpi_ut_create_generic_state (
void)
{
union acpi_generic_state *state;
ACPI_FUNCTION_ENTRY ();
state = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_STATE);
/* Initialize */
if (state) {
state->common.data_type = ACPI_DESC_TYPE_STATE;
}
return (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_thread_state
*
* PARAMETERS: None
*
* RETURN: New Thread State. NULL on failure
*
* DESCRIPTION: Create a "Thread State" - a flavor of the generic state used
* to track per-thread info during method execution
*
******************************************************************************/
struct acpi_thread_state *
acpi_ut_create_thread_state (
void)
{
union acpi_generic_state *state;
ACPI_FUNCTION_TRACE ("ut_create_thread_state");
/* Create the generic state object */
state = acpi_ut_create_generic_state ();
if (!state) {
return_PTR (NULL);
}
/* Init fields specific to the update struct */
state->common.data_type = ACPI_DESC_TYPE_STATE_THREAD;
state->thread.thread_id = acpi_os_get_thread_id ();
return_PTR ((struct acpi_thread_state *) state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_update_state
*
* PARAMETERS: Object - Initial Object to be installed in the state
* Action - Update action to be performed
*
* RETURN: New state object, null on failure
*
* DESCRIPTION: Create an "Update State" - a flavor of the generic state used
* to update reference counts and delete complex objects such
* as packages.
*
******************************************************************************/
union acpi_generic_state *
acpi_ut_create_update_state (
union acpi_operand_object *object,
u16 action)
{
union acpi_generic_state *state;
ACPI_FUNCTION_TRACE_PTR ("ut_create_update_state", object);
/* Create the generic state object */
state = acpi_ut_create_generic_state ();
if (!state) {
return_PTR (NULL);
}
/* Init fields specific to the update struct */
state->common.data_type = ACPI_DESC_TYPE_STATE_UPDATE;
state->update.object = object;
state->update.value = action;
return_PTR (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_pkg_state
*
* PARAMETERS: Object - Initial Object to be installed in the state
* Action - Update action to be performed
*
* RETURN: New state object, null on failure
*
* DESCRIPTION: Create a "Package State"
*
******************************************************************************/
union acpi_generic_state *
acpi_ut_create_pkg_state (
void *internal_object,
void *external_object,
u16 index)
{
union acpi_generic_state *state;
ACPI_FUNCTION_TRACE_PTR ("ut_create_pkg_state", internal_object);
/* Create the generic state object */
state = acpi_ut_create_generic_state ();
if (!state) {
return_PTR (NULL);
}
/* Init fields specific to the update struct */
state->common.data_type = ACPI_DESC_TYPE_STATE_PACKAGE;
state->pkg.source_object = (union acpi_operand_object *) internal_object;
state->pkg.dest_object = external_object;
state->pkg.index = index;
state->pkg.num_packages = 1;
return_PTR (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_create_control_state
*
* PARAMETERS: None
*
* RETURN: New state object, null on failure
*
* DESCRIPTION: Create a "Control State" - a flavor of the generic state used
* to support nested IF/WHILE constructs in the AML.
*
******************************************************************************/
union acpi_generic_state *
acpi_ut_create_control_state (
void)
{
union acpi_generic_state *state;
ACPI_FUNCTION_TRACE ("ut_create_control_state");
/* Create the generic state object */
state = acpi_ut_create_generic_state ();
if (!state) {
return_PTR (NULL);
}
/* Init fields specific to the control struct */
state->common.data_type = ACPI_DESC_TYPE_STATE_CONTROL;
state->common.state = ACPI_CONTROL_CONDITIONAL_EXECUTING;
return_PTR (state);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_delete_generic_state
*
* PARAMETERS: State - The state object to be deleted
*
* RETURN: None
*
* DESCRIPTION: Put a state object back into the global state cache. The object
* is not actually freed at this time.
*
******************************************************************************/
void
acpi_ut_delete_generic_state (
union acpi_generic_state *state)
{
ACPI_FUNCTION_TRACE ("ut_delete_generic_state");
acpi_ut_release_to_cache (ACPI_MEM_LIST_STATE, state);
return_VOID;
}
#ifdef ACPI_ENABLE_OBJECT_CACHE
/*******************************************************************************
*
* FUNCTION: acpi_ut_delete_generic_state_cache
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Purge the global state object cache. Used during subsystem
* termination.
*
******************************************************************************/
void
acpi_ut_delete_generic_state_cache (
void)
{
ACPI_FUNCTION_TRACE ("ut_delete_generic_state_cache");
acpi_ut_delete_generic_cache (ACPI_MEM_LIST_STATE);
return_VOID;
}
#endif
/*******************************************************************************
*
* FUNCTION: acpi_ut_walk_package_tree
*
* PARAMETERS: source_object - The package to walk
* target_object - Target object (if package is being copied)
* walk_callback - Called once for each package element
* Context - Passed to the callback function
*
* RETURN: Status
*
* DESCRIPTION: Walk through a package
*
******************************************************************************/
acpi_status
acpi_ut_walk_package_tree (
union acpi_operand_object *source_object,
void *target_object,
acpi_pkg_callback walk_callback,
void *context)
{
acpi_status status = AE_OK;
union acpi_generic_state *state_list = NULL;
union acpi_generic_state *state;
u32 this_index;
union acpi_operand_object *this_source_obj;
ACPI_FUNCTION_TRACE ("ut_walk_package_tree");
state = acpi_ut_create_pkg_state (source_object, target_object, 0);
if (!state) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
while (state) {
/* Get one element of the package */
this_index = state->pkg.index;
this_source_obj = (union acpi_operand_object *)
state->pkg.source_object->package.elements[this_index];
/*
* Check for:
* 1) An uninitialized package element. It is completely
* legal to declare a package and leave it uninitialized
* 2) Not an internal object - can be a namespace node instead
* 3) Any type other than a package. Packages are handled in else
* case below.
*/
if ((!this_source_obj) ||
(ACPI_GET_DESCRIPTOR_TYPE (this_source_obj) != ACPI_DESC_TYPE_OPERAND) ||
(ACPI_GET_OBJECT_TYPE (this_source_obj) != ACPI_TYPE_PACKAGE)) {
status = walk_callback (ACPI_COPY_TYPE_SIMPLE, this_source_obj,
state, context);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
state->pkg.index++;
while (state->pkg.index >= state->pkg.source_object->package.count) {
/*
* We've handled all of the objects at this level, This means
* that we have just completed a package. That package may
* have contained one or more packages itself.
*
* Delete this state and pop the previous state (package).
*/
acpi_ut_delete_generic_state (state);
state = acpi_ut_pop_generic_state (&state_list);
/* Finished when there are no more states */
if (!state) {
/*
* We have handled all of the objects in the top level
* package just add the length of the package objects
* and exit
*/
return_ACPI_STATUS (AE_OK);
}
/*
* Go back up a level and move the index past the just
* completed package object.
*/
state->pkg.index++;
}
}
else {
/* This is a subobject of type package */
status = walk_callback (ACPI_COPY_TYPE_PACKAGE, this_source_obj,
state, context);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/*
* Push the current state and create a new one
* The callback above returned a new target package object.
*/
acpi_ut_push_generic_state (&state_list, state);
state = acpi_ut_create_pkg_state (this_source_obj,
state->pkg.this_target_obj, 0);
if (!state) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
}
/* We should never get here */
return_ACPI_STATUS (AE_AML_INTERNAL);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_generate_checksum
*
* PARAMETERS: Buffer - Buffer to be scanned
* Length - number of bytes to examine
*
* RETURN: The generated checksum
*
* DESCRIPTION: Generate a checksum on a raw buffer
*
******************************************************************************/
u8
acpi_ut_generate_checksum (
u8 *buffer,
u32 length)
{
u32 i;
signed char sum = 0;
for (i = 0; i < length; i++) {
sum = (signed char) (sum + buffer[i]);
}
return ((u8) (0 - sum));
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_get_resource_end_tag
*
* PARAMETERS: obj_desc - The resource template buffer object
*
* RETURN: Pointer to the end tag
*
* DESCRIPTION: Find the END_TAG resource descriptor in a resource template
*
******************************************************************************/
u8 *
acpi_ut_get_resource_end_tag (
union acpi_operand_object *obj_desc)
{
u8 buffer_byte;
u8 *buffer;
u8 *end_buffer;
buffer = obj_desc->buffer.pointer;
end_buffer = buffer + obj_desc->buffer.length;
while (buffer < end_buffer) {
buffer_byte = *buffer;
if (buffer_byte & ACPI_RDESC_TYPE_MASK) {
/* Large Descriptor - Length is next 2 bytes */
buffer += ((*(buffer+1) | (*(buffer+2) << 8)) + 3);
}
else {
/* Small Descriptor. End Tag will be found here */
if ((buffer_byte & ACPI_RDESC_SMALL_MASK) == ACPI_RDESC_TYPE_END_TAG) {
/* Found the end tag descriptor, all done. */
return (buffer);
}
/* Length is in the header */
buffer += ((buffer_byte & 0x07) + 1);
}
}
/* End tag not found */
return (NULL);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_report_error
*
* PARAMETERS: module_name - Caller's module name (for error output)
* line_number - Caller's line number (for error output)
* component_id - Caller's component ID (for error output)
*
* RETURN: None
*
* DESCRIPTION: Print error message
*
******************************************************************************/
void
acpi_ut_report_error (
char *module_name,
u32 line_number,
u32 component_id)
{
acpi_os_printf ("%8s-%04d: *** Error: ", module_name, line_number);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_report_warning
*
* PARAMETERS: module_name - Caller's module name (for error output)
* line_number - Caller's line number (for error output)
* component_id - Caller's component ID (for error output)
*
* RETURN: None
*
* DESCRIPTION: Print warning message
*
******************************************************************************/
void
acpi_ut_report_warning (
char *module_name,
u32 line_number,
u32 component_id)
{
acpi_os_printf ("%8s-%04d: *** Warning: ", module_name, line_number);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_report_info
*
* PARAMETERS: module_name - Caller's module name (for error output)
* line_number - Caller's line number (for error output)
* component_id - Caller's component ID (for error output)
*
* RETURN: None
*
* DESCRIPTION: Print information message
*
******************************************************************************/
void
acpi_ut_report_info (
char *module_name,
u32 line_number,
u32 component_id)
{
acpi_os_printf ("%8s-%04d: *** Info: ", module_name, line_number);
}
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