litmus-rt.git - The LITMUS^RT kernel.

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author	Lin Ming <ming.m.lin@intel.com>	2008-12-16 04:08:57 -0500
committer	Len Brown <len.brown@intel.com>	2008-12-31 01:12:41 -0500
commit	385c4d98d851bc94ad4f351fe25fe49b70b9cf78 (patch)
tree	b1e69f466838549639da5f269a8a073a9d7e7eed
parent	a8ce4471fe74cf749bcfef7e557a7b94f725c494 (diff)

ACPI: io_common.c: call acpi_get_table to avoid using ACPI_SIG_DSDT

ACPI_SIG_DSDT is acpica internal used only. call acpi_get_table to avoid using ACPI_SIG_DSDT. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>

Diffstat

-rw-r--r--

arch/ia64/sn/kernel/io_common.c

1 files changed, 2 insertions, 2 deletions


diff --git a/arch/ia64/sn/kernel/io_common.c b/arch/ia64/sn/kernel/io_common.c index 8a924a5661dd..e1917ede0d60 100644 --- a/arch/ia64/sn/kernel/io_common.c +++ b/arch/ia64/sn/kernel/io_common.c
@@ -473,7 +473,7 @@ sn_io_early_init(void)
473	{	473	{
474	struct acpi_table_header *header = NULL;	474	struct acpi_table_header *header = NULL;
475		475
476	acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);	476	acpi_get_table(ACPI_SIG_DSDT, 1, &header);
477	BUG_ON(header == NULL);	477	BUG_ON(header == NULL);
478	sn_acpi_rev = header->oem_revision;	478	sn_acpi_rev = header->oem_revision;
479	}	479	}
@@ -505,7 +505,7 @@ sn_io_early_init(void)
505		505
506	{	506	{
507	struct acpi_table_header *header;	507	struct acpi_table_header *header;
508	(void)acpi_get_table_by_index(ACPI_TABLE_INDEX_DSDT, &header);	508	(void)acpi_get_table(ACPI_SIG_DSDT, 1, &header);
509	printk(KERN_INFO "ACPI DSDT OEM Rev 0x%x\n",	509	printk(KERN_INFO "ACPI DSDT OEM Rev 0x%x\n",
510	header->oem_revision);	510	header->oem_revision);
511	}	511	}

/******************************************************************************* * * 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 */


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