Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /****************************************************************************** |
| 3 | * |
| 4 | * Module Name: exstorob - AML Interpreter object store support, store to object |
| 5 | * |
| 6 | *****************************************************************************/ |
| 7 | |
| 8 | /* |
Bob Moore | 4a90c7e | 2006-01-13 16:22:00 -0500 | [diff] [blame] | 9 | * Copyright (C) 2000 - 2006, R. Byron Moore |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * All rights reserved. |
| 11 | * |
| 12 | * Redistribution and use in source and binary forms, with or without |
| 13 | * modification, are permitted provided that the following conditions |
| 14 | * are met: |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions, and the following disclaimer, |
| 17 | * without modification. |
| 18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 19 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 20 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 21 | * including a substantially similar Disclaimer requirement for further |
| 22 | * binary redistribution. |
| 23 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 24 | * of any contributors may be used to endorse or promote products derived |
| 25 | * from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 29 | * Software Foundation. |
| 30 | * |
| 31 | * NO WARRANTY |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 42 | * POSSIBILITY OF SUCH DAMAGES. |
| 43 | */ |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include <acpi/acpi.h> |
| 46 | #include <acpi/acinterp.h> |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #define _COMPONENT ACPI_EXECUTER |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 49 | ACPI_MODULE_NAME("exstorob") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | /******************************************************************************* |
| 52 | * |
| 53 | * FUNCTION: acpi_ex_store_buffer_to_buffer |
| 54 | * |
| 55 | * PARAMETERS: source_desc - Source object to copy |
| 56 | * target_desc - Destination object of the copy |
| 57 | * |
| 58 | * RETURN: Status |
| 59 | * |
| 60 | * DESCRIPTION: Copy a buffer object to another buffer object. |
| 61 | * |
| 62 | ******************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 64 | acpi_ex_store_buffer_to_buffer(union acpi_operand_object *source_desc, |
| 65 | union acpi_operand_object *target_desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 67 | u32 length; |
| 68 | u8 *buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 70 | ACPI_FUNCTION_TRACE_PTR(ex_store_buffer_to_buffer, source_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | /* We know that source_desc is a buffer by now */ |
| 73 | |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 74 | buffer = ACPI_CAST_PTR(u8, source_desc->buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | length = source_desc->buffer.length; |
| 76 | |
| 77 | /* |
| 78 | * If target is a buffer of length zero or is a static buffer, |
| 79 | * allocate a new buffer of the proper length |
| 80 | */ |
| 81 | if ((target_desc->buffer.length == 0) || |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 82 | (target_desc->common.flags & AOPOBJ_STATIC_POINTER)) { |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 83 | target_desc->buffer.pointer = ACPI_ALLOCATE(length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | if (!target_desc->buffer.pointer) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 85 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | target_desc->buffer.length = length; |
| 89 | } |
| 90 | |
| 91 | /* Copy source buffer to target buffer */ |
| 92 | |
| 93 | if (length <= target_desc->buffer.length) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | /* Clear existing buffer and copy in the new one */ |
| 96 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 97 | ACPI_MEMSET(target_desc->buffer.pointer, 0, |
| 98 | target_desc->buffer.length); |
| 99 | ACPI_MEMCPY(target_desc->buffer.pointer, buffer, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | #ifdef ACPI_OBSOLETE_BEHAVIOR |
| 102 | /* |
| 103 | * NOTE: ACPI versions up to 3.0 specified that the buffer must be |
| 104 | * truncated if the string is smaller than the buffer. However, "other" |
| 105 | * implementations of ACPI never did this and thus became the defacto |
Bob Moore | 958dd24 | 2006-05-12 17:12:00 -0400 | [diff] [blame] | 106 | * standard. ACPI 3.0_a changes this behavior such that the buffer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | * is no longer truncated. |
| 108 | */ |
| 109 | |
| 110 | /* |
| 111 | * OBSOLETE BEHAVIOR: |
| 112 | * If the original source was a string, we must truncate the buffer, |
| 113 | * according to the ACPI spec. Integer-to-Buffer and Buffer-to-Buffer |
| 114 | * copy must not truncate the original buffer. |
| 115 | */ |
| 116 | if (original_src_type == ACPI_TYPE_STRING) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | /* Set the new length of the target */ |
| 119 | |
| 120 | target_desc->buffer.length = length; |
| 121 | } |
| 122 | #endif |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | /* Truncate the source, copy only what will fit */ |
| 125 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 126 | ACPI_MEMCPY(target_desc->buffer.pointer, buffer, |
| 127 | target_desc->buffer.length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 129 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 130 | "Truncating source buffer from %X to %X\n", |
| 131 | length, target_desc->buffer.length)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
| 133 | |
| 134 | /* Copy flags */ |
| 135 | |
| 136 | target_desc->buffer.flags = source_desc->buffer.flags; |
| 137 | target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 138 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | } |
| 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | /******************************************************************************* |
| 142 | * |
| 143 | * FUNCTION: acpi_ex_store_string_to_string |
| 144 | * |
| 145 | * PARAMETERS: source_desc - Source object to copy |
| 146 | * target_desc - Destination object of the copy |
| 147 | * |
| 148 | * RETURN: Status |
| 149 | * |
| 150 | * DESCRIPTION: Copy a String object to another String object |
| 151 | * |
| 152 | ******************************************************************************/ |
| 153 | |
| 154 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 155 | acpi_ex_store_string_to_string(union acpi_operand_object *source_desc, |
| 156 | union acpi_operand_object *target_desc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 158 | u32 length; |
| 159 | u8 *buffer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame] | 161 | ACPI_FUNCTION_TRACE_PTR(ex_store_string_to_string, source_desc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
| 163 | /* We know that source_desc is a string by now */ |
| 164 | |
Bob Moore | c51a4de | 2005-11-17 13:07:00 -0500 | [diff] [blame] | 165 | buffer = ACPI_CAST_PTR(u8, source_desc->string.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | length = source_desc->string.length; |
| 167 | |
| 168 | /* |
| 169 | * Replace existing string value if it will fit and the string |
| 170 | * pointer is not a static pointer (part of an ACPI table) |
| 171 | */ |
| 172 | if ((length < target_desc->string.length) && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 173 | (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | /* |
| 175 | * String will fit in existing non-static buffer. |
| 176 | * Clear old string and copy in the new one |
| 177 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | ACPI_MEMSET(target_desc->string.pointer, 0, |
| 179 | (acpi_size) target_desc->string.length + 1); |
| 180 | ACPI_MEMCPY(target_desc->string.pointer, buffer, length); |
| 181 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | /* |
| 183 | * Free the current buffer, then allocate a new buffer |
| 184 | * large enough to hold the value |
| 185 | */ |
| 186 | if (target_desc->string.pointer && |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 187 | (!(target_desc->common.flags & AOPOBJ_STATIC_POINTER))) { |
Bob Moore | 52fc0b0 | 2006-10-02 00:00:00 -0400 | [diff] [blame] | 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | /* Only free if not a pointer into the DSDT */ |
| 190 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 191 | ACPI_FREE(target_desc->string.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
| 193 | |
Bob Moore | 8313524 | 2006-10-03 00:00:00 -0400 | [diff] [blame] | 194 | target_desc->string.pointer = ACPI_ALLOCATE_ZEROED((acpi_size) |
| 195 | length + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | if (!target_desc->string.pointer) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 197 | return_ACPI_STATUS(AE_NO_MEMORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | target_desc->common.flags &= ~AOPOBJ_STATIC_POINTER; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 201 | ACPI_MEMCPY(target_desc->string.pointer, buffer, length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | /* Set the new target length */ |
| 205 | |
| 206 | target_desc->string.length = length; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 207 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |