diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-09 14:55:14 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-09 14:55:14 -0500 |
| commit | a3a798c88a14b35e5d4ca30716dbc9eb9a1ddfe2 (patch) | |
| tree | 393969a0f1405237483c8c29b904690f2bb90559 /drivers/acpi/acpica/psutils.c | |
| parent | efcb3cf7f00c3c424db012380a8a974c2676a3c8 (diff) | |
| parent | d97c0defba25a959a990f6d4759f43075540832e (diff) | |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (94 commits)
ACPICA: hide private headers
ACPICA: create acpica/ directory
ACPI: fix build warning
ACPI : Use RSDT instead of XSDT by adding boot option of "acpi=rsdt"
ACPI: Avoid array address overflow when _CST MWAIT hint bits are set
fujitsu-laptop: Simplify SBLL/SBL2 backlight handling
fujitsu-laptop: Add BL power, LED control and radio state information
ACPICA: delete utcache.c
ACPICA: delete acdisasm.h
ACPICA: Update version to 20081204.
ACPICA: FADT: Update error msgs for consistency
ACPICA: FADT: set acpi_gbl_use_default_register_widths to TRUE by default
ACPICA: FADT parsing changes and fixes
ACPICA: Add ACPI_MUTEX_TYPE configuration option
ACPICA: Fixes for various ACPI data tables
ACPICA: Restructure includes into public/private
ACPI: remove private acpica headers from driver files
ACPI: reboot.c: use new acpi_reset interface
ACPICA: New: acpi_reset interface - write to reset register
ACPICA: Move all public H/W interfaces to new hwxface
...
Diffstat (limited to 'drivers/acpi/acpica/psutils.c')
| -rw-r--r-- | drivers/acpi/acpica/psutils.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/psutils.c b/drivers/acpi/acpica/psutils.c new file mode 100644 index 00000000000..e636e078ad3 --- /dev/null +++ b/drivers/acpi/acpica/psutils.c | |||
| @@ -0,0 +1,244 @@ | |||
| 1 | /****************************************************************************** | ||
| 2 | * | ||
| 3 | * Module Name: psutils - Parser miscellaneous utilities (Parser only) | ||
| 4 | * | ||
| 5 | *****************************************************************************/ | ||
| 6 | |||
| 7 | /* | ||
| 8 | * Copyright (C) 2000 - 2008, Intel Corp. | ||
| 9 | * All rights reserved. | ||
| 10 | * | ||
| 11 | * Redistribution and use in source and binary forms, with or without | ||
| 12 | * modification, are permitted provided that the following conditions | ||
| 13 | * are met: | ||
| 14 | * 1. Redistributions of source code must retain the above copyright | ||
| 15 | * notice, this list of conditions, and the following disclaimer, | ||
| 16 | * without modification. | ||
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | ||
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below | ||
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon | ||
| 20 | * including a substantially similar Disclaimer requirement for further | ||
| 21 | * binary redistribution. | ||
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names | ||
| 23 | * of any contributors may be used to endorse or promote products derived | ||
| 24 | * from this software without specific prior written permission. | ||
| 25 | * | ||
| 26 | * Alternatively, this software may be distributed under the terms of the | ||
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free | ||
| 28 | * Software Foundation. | ||
| 29 | * | ||
| 30 | * NO WARRANTY | ||
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | ||
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | ||
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | ||
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | ||
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | ||
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | ||
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | ||
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| 41 | * POSSIBILITY OF SUCH DAMAGES. | ||
| 42 | */ | ||
| 43 | |||
| 44 | #include <acpi/acpi.h> | ||
| 45 | #include "accommon.h" | ||
| 46 | #include "acparser.h" | ||
| 47 | #include "amlcode.h" | ||
| 48 | |||
| 49 | #define _COMPONENT ACPI_PARSER | ||
| 50 | ACPI_MODULE_NAME("psutils") | ||
| 51 | |||
| 52 | /******************************************************************************* | ||
| 53 | * | ||
| 54 | * FUNCTION: acpi_ps_create_scope_op | ||
| 55 | * | ||
| 56 | * PARAMETERS: None | ||
| 57 | * | ||
| 58 | * RETURN: A new Scope object, null on failure | ||
| 59 | * | ||
| 60 | * DESCRIPTION: Create a Scope and associated namepath op with the root name | ||
| 61 | * | ||
| 62 | ******************************************************************************/ | ||
| 63 | union acpi_parse_object *acpi_ps_create_scope_op(void) | ||
| 64 | { | ||
| 65 | union acpi_parse_object *scope_op; | ||
| 66 | |||
| 67 | scope_op = acpi_ps_alloc_op(AML_SCOPE_OP); | ||
| 68 | if (!scope_op) { | ||
| 69 | return (NULL); | ||
| 70 | } | ||
| 71 | |||
| 72 | scope_op->named.name = ACPI_ROOT_NAME; | ||
| 73 | return (scope_op); | ||
| 74 | } | ||
| 75 | |||
| 76 | /******************************************************************************* | ||
| 77 | * | ||
| 78 | * FUNCTION: acpi_ps_init_op | ||
| 79 | * | ||
| 80 | * PARAMETERS: Op - A newly allocated Op object | ||
| 81 | * Opcode - Opcode to store in the Op | ||
| 82 | * | ||
| 83 | * RETURN: None | ||
| 84 | * | ||
| 85 | * DESCRIPTION: Initialize a parse (Op) object | ||
| 86 | * | ||
| 87 | ******************************************************************************/ | ||
| 88 | |||
| 89 | void acpi_ps_init_op(union acpi_parse_object *op, u16 opcode) | ||
| 90 | { | ||
| 91 | ACPI_FUNCTION_ENTRY(); | ||
| 92 | |||
| 93 | op->common.descriptor_type = ACPI_DESC_TYPE_PARSER; | ||
| 94 | op->common.aml_opcode = opcode; | ||
| 95 | |||
| 96 | ACPI_DISASM_ONLY_MEMBERS(ACPI_STRNCPY(op->common.aml_op_name, | ||
| 97 | (acpi_ps_get_opcode_info | ||
| 98 | (opcode))->name, | ||
| 99 | sizeof(op->common.aml_op_name))); | ||
| 100 | } | ||
| 101 | |||
| 102 | /******************************************************************************* | ||
| 103 | * | ||
| 104 | * FUNCTION: acpi_ps_alloc_op | ||
| 105 | * | ||
| 106 | * PARAMETERS: Opcode - Opcode that will be stored in the new Op | ||
| 107 | * | ||
| 108 | * RETURN: Pointer to the new Op, null on failure | ||
| 109 | * | ||
| 110 | * DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on | ||
| 111 | * opcode. A cache of opcodes is available for the pure | ||
| 112 | * GENERIC_OP, since this is by far the most commonly used. | ||
| 113 | * | ||
| 114 | ******************************************************************************/ | ||
| 115 | |||
| 116 | union acpi_parse_object *acpi_ps_alloc_op(u16 opcode) | ||
| 117 | { | ||
| 118 | union acpi_parse_object *op; | ||
| 119 | const struct acpi_opcode_info *op_info; | ||
| 120 | u8 flags = ACPI_PARSEOP_GENERIC; | ||
| 121 | |||
| 122 | ACPI_FUNCTION_ENTRY(); | ||
| 123 | |||
| 124 | op_info = acpi_ps_get_opcode_info(opcode); | ||
| 125 | |||
| 126 | /* Determine type of parse_op required */ | ||
| 127 | |||
| 128 | if (op_info->flags & AML_DEFER) { | ||
| 129 | flags = ACPI_PARSEOP_DEFERRED; | ||
| 130 | } else if (op_info->flags & AML_NAMED) { | ||
| 131 | flags = ACPI_PARSEOP_NAMED; | ||
| 132 | } else if (opcode == AML_INT_BYTELIST_OP) { | ||
| 133 | flags = ACPI_PARSEOP_BYTELIST; | ||
| 134 | } | ||
| 135 | |||
| 136 | /* Allocate the minimum required size object */ | ||
| 137 | |||
| 138 | if (flags == ACPI_PARSEOP_GENERIC) { | ||
| 139 | |||
| 140 | /* The generic op (default) is by far the most common (16 to 1) */ | ||
| 141 | |||
| 142 | op = acpi_os_acquire_object(acpi_gbl_ps_node_cache); | ||
| 143 | } else { | ||
| 144 | /* Extended parseop */ | ||
| 145 | |||
| 146 | op = acpi_os_acquire_object(acpi_gbl_ps_node_ext_cache); | ||
| 147 | } | ||
| 148 | |||
| 149 | /* Initialize the Op */ | ||
| 150 | |||
| 151 | if (op) { | ||
| 152 | acpi_ps_init_op(op, opcode); | ||
| 153 | op->common.flags = flags; | ||
| 154 | } | ||
| 155 | |||
| 156 | return (op); | ||
| 157 | } | ||
| 158 | |||
| 159 | /******************************************************************************* | ||
| 160 | * | ||
| 161 | * FUNCTION: acpi_ps_free_op | ||
| 162 | * | ||
| 163 | * PARAMETERS: Op - Op to be freed | ||
| 164 | * | ||
| 165 | * RETURN: None. | ||
| 166 | * | ||
| 167 | * DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list | ||
| 168 | * or actually free it. | ||
| 169 | * | ||
| 170 | ******************************************************************************/ | ||
| 171 | |||
| 172 | void acpi_ps_free_op(union acpi_parse_object *op) | ||
| 173 | { | ||
| 174 | ACPI_FUNCTION_NAME(ps_free_op); | ||
| 175 | |||
| 176 | if (op->common.aml_opcode == AML_INT_RETURN_VALUE_OP) { | ||
| 177 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Free retval op: %p\n", | ||
| 178 | op)); | ||
| 179 | } | ||
| 180 | |||
| 181 | if (op->common.flags & ACPI_PARSEOP_GENERIC) { | ||
| 182 | (void)acpi_os_release_object(acpi_gbl_ps_node_cache, op); | ||
| 183 | } else { | ||
| 184 | (void)acpi_os_release_object(acpi_gbl_ps_node_ext_cache, op); | ||
| 185 | } | ||
| 186 | } | ||
| 187 | |||
| 188 | /******************************************************************************* | ||
| 189 | * | ||
| 190 | * FUNCTION: Utility functions | ||
| 191 | * | ||
| 192 | * DESCRIPTION: Low level character and object functions | ||
| 193 | * | ||
| 194 | ******************************************************************************/ | ||
| 195 | |||
| 196 | /* | ||
| 197 | * Is "c" a namestring lead character? | ||
| 198 | */ | ||
| 199 | u8 acpi_ps_is_leading_char(u32 c) | ||
| 200 | { | ||
| 201 | return ((u8) (c == '_' || (c >= 'A' && c <= 'Z'))); | ||
| 202 | } | ||
| 203 | |||
| 204 | /* | ||
| 205 | * Is "c" a namestring prefix character? | ||
| 206 | */ | ||
| 207 | u8 acpi_ps_is_prefix_char(u32 c) | ||
| 208 | { | ||
| 209 | return ((u8) (c == '\\' || c == '^')); | ||
| 210 | } | ||
| 211 | |||
| 212 | /* | ||
| 213 | * Get op's name (4-byte name segment) or 0 if unnamed | ||
| 214 | */ | ||
| 215 | #ifdef ACPI_FUTURE_USAGE | ||
| 216 | u32 acpi_ps_get_name(union acpi_parse_object * op) | ||
| 217 | { | ||
| 218 | |||
| 219 | /* The "generic" object has no name associated with it */ | ||
| 220 | |||
| 221 | if (op->common.flags & ACPI_PARSEOP_GENERIC) { | ||
| 222 | return (0); | ||
| 223 | } | ||
| 224 | |||
| 225 | /* Only the "Extended" parse objects have a name */ | ||
| 226 | |||
| 227 | return (op->named.name); | ||
| 228 | } | ||
| 229 | #endif /* ACPI_FUTURE_USAGE */ | ||
| 230 | |||
| 231 | /* | ||
| 232 | * Set op's name | ||
| 233 | */ | ||
| 234 | void acpi_ps_set_name(union acpi_parse_object *op, u32 name) | ||
| 235 | { | ||
| 236 | |||
| 237 | /* The "generic" object has no name associated with it */ | ||
| 238 | |||
| 239 | if (op->common.flags & ACPI_PARSEOP_GENERIC) { | ||
| 240 | return; | ||
| 241 | } | ||
| 242 | |||
| 243 | op->named.name = name; | ||
| 244 | } | ||
