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kernel-fxtec-pro1x/drivers/acpi/utilities/utmisc.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

1516 lines
37 KiB
C
Raw Blame History

/*******************************************************************************
*
* 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")
/*******************************************************************************
*
* FUNCTION: acpi_ut_print_string
*
* PARAMETERS: String - Null terminated ASCII string
*
* 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
*
* 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: 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: Character - The character to be examined
*
* RETURN: 1 if Character may appear in a name, else 0
*
* 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_strupr
*
* PARAMETERS: src_string - The source string to convert to
*
* RETURN: src_string
*
* DESCRIPTION: Convert string to uppercase
*
******************************************************************************/
#ifdef ACPI_FUTURE_USAGE
char *
acpi_ut_strupr (
char *src_string)
{
char *string;
ACPI_FUNCTION_ENTRY ();
/* Walk entire string, uppercasing the letters */
for (string = src_string; *string; ) {
*string = (char) ACPI_TOUPPER (*string);
string++;
}
return (src_string);
}
#endif /* ACPI_FUTURE_USAGE */
/*******************************************************************************
*
* 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.
*
******************************************************************************/
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.
*
******************************************************************************/
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: None
*
* 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: None
*
* 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: Status
*
* 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: Status
*
* 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: Status
*
* 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: Thread State
*
* 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: Status
*
* 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: Status
*
* 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: Status
*
* 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: Status
*
* 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: Status
*
* 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: obj_desc - The Package object on which to resolve refs
*
* 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: 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)
* Message - Error message to use on failure
*
* 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)
* Message - Error message to use on failure
*
* 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)
* Message - Error message to use on failure
*
* 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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