195b482a8SLen Brown 295b482a8SLen Brown /****************************************************************************** 395b482a8SLen Brown * 495b482a8SLen Brown * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes 595b482a8SLen Brown * 695b482a8SLen Brown *****************************************************************************/ 795b482a8SLen Brown 895b482a8SLen Brown /* 995b482a8SLen Brown * Copyright (C) 2000 - 2008, Intel Corp. 1095b482a8SLen Brown * All rights reserved. 1195b482a8SLen Brown * 1295b482a8SLen Brown * Redistribution and use in source and binary forms, with or without 1395b482a8SLen Brown * modification, are permitted provided that the following conditions 1495b482a8SLen Brown * are met: 1595b482a8SLen Brown * 1. Redistributions of source code must retain the above copyright 1695b482a8SLen Brown * notice, this list of conditions, and the following disclaimer, 1795b482a8SLen Brown * without modification. 1895b482a8SLen Brown * 2. Redistributions in binary form must reproduce at minimum a disclaimer 1995b482a8SLen Brown * substantially similar to the "NO WARRANTY" disclaimer below 2095b482a8SLen Brown * ("Disclaimer") and any redistribution must be conditioned upon 2195b482a8SLen Brown * including a substantially similar Disclaimer requirement for further 2295b482a8SLen Brown * binary redistribution. 2395b482a8SLen Brown * 3. Neither the names of the above-listed copyright holders nor the names 2495b482a8SLen Brown * of any contributors may be used to endorse or promote products derived 2595b482a8SLen Brown * from this software without specific prior written permission. 2695b482a8SLen Brown * 2795b482a8SLen Brown * Alternatively, this software may be distributed under the terms of the 2895b482a8SLen Brown * GNU General Public License ("GPL") version 2 as published by the Free 2995b482a8SLen Brown * Software Foundation. 3095b482a8SLen Brown * 3195b482a8SLen Brown * NO WARRANTY 3295b482a8SLen Brown * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 3395b482a8SLen Brown * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3495b482a8SLen Brown * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 3595b482a8SLen Brown * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3695b482a8SLen Brown * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3795b482a8SLen Brown * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3895b482a8SLen Brown * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3995b482a8SLen Brown * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4095b482a8SLen Brown * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 4195b482a8SLen Brown * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 4295b482a8SLen Brown * POSSIBILITY OF SUCH DAMAGES. 4395b482a8SLen Brown */ 4495b482a8SLen Brown 4595b482a8SLen Brown #include <acpi/acpi.h> 46*e2f7a777SLen Brown #include "accommon.h" 47*e2f7a777SLen Brown #include "acinterp.h" 48*e2f7a777SLen Brown #include "amlcode.h" 49*e2f7a777SLen Brown #include "amlresrc.h" 5095b482a8SLen Brown 5195b482a8SLen Brown #define _COMPONENT ACPI_EXECUTER 5295b482a8SLen Brown ACPI_MODULE_NAME("exmisc") 5395b482a8SLen Brown 5495b482a8SLen Brown /******************************************************************************* 5595b482a8SLen Brown * 5695b482a8SLen Brown * FUNCTION: acpi_ex_get_object_reference 5795b482a8SLen Brown * 5895b482a8SLen Brown * PARAMETERS: obj_desc - Create a reference to this object 5995b482a8SLen Brown * return_desc - Where to store the reference 6095b482a8SLen Brown * walk_state - Current state 6195b482a8SLen Brown * 6295b482a8SLen Brown * RETURN: Status 6395b482a8SLen Brown * 6495b482a8SLen Brown * DESCRIPTION: Obtain and return a "reference" to the target object 6595b482a8SLen Brown * Common code for the ref_of_op and the cond_ref_of_op. 6695b482a8SLen Brown * 6795b482a8SLen Brown ******************************************************************************/ 6895b482a8SLen Brown acpi_status 6995b482a8SLen Brown acpi_ex_get_object_reference(union acpi_operand_object *obj_desc, 7095b482a8SLen Brown union acpi_operand_object **return_desc, 7195b482a8SLen Brown struct acpi_walk_state *walk_state) 7295b482a8SLen Brown { 7395b482a8SLen Brown union acpi_operand_object *reference_obj; 7495b482a8SLen Brown union acpi_operand_object *referenced_obj; 7595b482a8SLen Brown 7695b482a8SLen Brown ACPI_FUNCTION_TRACE_PTR(ex_get_object_reference, obj_desc); 7795b482a8SLen Brown 7895b482a8SLen Brown *return_desc = NULL; 7995b482a8SLen Brown 8095b482a8SLen Brown switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { 8195b482a8SLen Brown case ACPI_DESC_TYPE_OPERAND: 8295b482a8SLen Brown 8395b482a8SLen Brown if (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_LOCAL_REFERENCE) { 8495b482a8SLen Brown return_ACPI_STATUS(AE_AML_OPERAND_TYPE); 8595b482a8SLen Brown } 8695b482a8SLen Brown 8795b482a8SLen Brown /* 8895b482a8SLen Brown * Must be a reference to a Local or Arg 8995b482a8SLen Brown */ 9095b482a8SLen Brown switch (obj_desc->reference.class) { 9195b482a8SLen Brown case ACPI_REFCLASS_LOCAL: 9295b482a8SLen Brown case ACPI_REFCLASS_ARG: 9395b482a8SLen Brown case ACPI_REFCLASS_DEBUG: 9495b482a8SLen Brown 9595b482a8SLen Brown /* The referenced object is the pseudo-node for the local/arg */ 9695b482a8SLen Brown 9795b482a8SLen Brown referenced_obj = obj_desc->reference.object; 9895b482a8SLen Brown break; 9995b482a8SLen Brown 10095b482a8SLen Brown default: 10195b482a8SLen Brown 10295b482a8SLen Brown ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X", 10395b482a8SLen Brown obj_desc->reference.class)); 10495b482a8SLen Brown return_ACPI_STATUS(AE_AML_INTERNAL); 10595b482a8SLen Brown } 10695b482a8SLen Brown break; 10795b482a8SLen Brown 10895b482a8SLen Brown case ACPI_DESC_TYPE_NAMED: 10995b482a8SLen Brown 11095b482a8SLen Brown /* 11195b482a8SLen Brown * A named reference that has already been resolved to a Node 11295b482a8SLen Brown */ 11395b482a8SLen Brown referenced_obj = obj_desc; 11495b482a8SLen Brown break; 11595b482a8SLen Brown 11695b482a8SLen Brown default: 11795b482a8SLen Brown 11895b482a8SLen Brown ACPI_ERROR((AE_INFO, "Invalid descriptor type %X", 11995b482a8SLen Brown ACPI_GET_DESCRIPTOR_TYPE(obj_desc))); 12095b482a8SLen Brown return_ACPI_STATUS(AE_TYPE); 12195b482a8SLen Brown } 12295b482a8SLen Brown 12395b482a8SLen Brown /* Create a new reference object */ 12495b482a8SLen Brown 12595b482a8SLen Brown reference_obj = 12695b482a8SLen Brown acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); 12795b482a8SLen Brown if (!reference_obj) { 12895b482a8SLen Brown return_ACPI_STATUS(AE_NO_MEMORY); 12995b482a8SLen Brown } 13095b482a8SLen Brown 13195b482a8SLen Brown reference_obj->reference.class = ACPI_REFCLASS_REFOF; 13295b482a8SLen Brown reference_obj->reference.object = referenced_obj; 13395b482a8SLen Brown *return_desc = reference_obj; 13495b482a8SLen Brown 13595b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 13695b482a8SLen Brown "Object %p Type [%s], returning Reference %p\n", 13795b482a8SLen Brown obj_desc, acpi_ut_get_object_type_name(obj_desc), 13895b482a8SLen Brown *return_desc)); 13995b482a8SLen Brown 14095b482a8SLen Brown return_ACPI_STATUS(AE_OK); 14195b482a8SLen Brown } 14295b482a8SLen Brown 14395b482a8SLen Brown /******************************************************************************* 14495b482a8SLen Brown * 14595b482a8SLen Brown * FUNCTION: acpi_ex_concat_template 14695b482a8SLen Brown * 14795b482a8SLen Brown * PARAMETERS: Operand0 - First source object 14895b482a8SLen Brown * Operand1 - Second source object 14995b482a8SLen Brown * actual_return_desc - Where to place the return object 15095b482a8SLen Brown * walk_state - Current walk state 15195b482a8SLen Brown * 15295b482a8SLen Brown * RETURN: Status 15395b482a8SLen Brown * 15495b482a8SLen Brown * DESCRIPTION: Concatenate two resource templates 15595b482a8SLen Brown * 15695b482a8SLen Brown ******************************************************************************/ 15795b482a8SLen Brown 15895b482a8SLen Brown acpi_status 15995b482a8SLen Brown acpi_ex_concat_template(union acpi_operand_object *operand0, 16095b482a8SLen Brown union acpi_operand_object *operand1, 16195b482a8SLen Brown union acpi_operand_object **actual_return_desc, 16295b482a8SLen Brown struct acpi_walk_state *walk_state) 16395b482a8SLen Brown { 16495b482a8SLen Brown acpi_status status; 16595b482a8SLen Brown union acpi_operand_object *return_desc; 16695b482a8SLen Brown u8 *new_buf; 16795b482a8SLen Brown u8 *end_tag; 16895b482a8SLen Brown acpi_size length0; 16995b482a8SLen Brown acpi_size length1; 17095b482a8SLen Brown acpi_size new_length; 17195b482a8SLen Brown 17295b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_concat_template); 17395b482a8SLen Brown 17495b482a8SLen Brown /* 17595b482a8SLen Brown * Find the end_tag descriptor in each resource template. 17695b482a8SLen Brown * Note1: returned pointers point TO the end_tag, not past it. 17795b482a8SLen Brown * Note2: zero-length buffers are allowed; treated like one end_tag 17895b482a8SLen Brown */ 17995b482a8SLen Brown 18095b482a8SLen Brown /* Get the length of the first resource template */ 18195b482a8SLen Brown 18295b482a8SLen Brown status = acpi_ut_get_resource_end_tag(operand0, &end_tag); 18395b482a8SLen Brown if (ACPI_FAILURE(status)) { 18495b482a8SLen Brown return_ACPI_STATUS(status); 18595b482a8SLen Brown } 18695b482a8SLen Brown 18795b482a8SLen Brown length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer); 18895b482a8SLen Brown 18995b482a8SLen Brown /* Get the length of the second resource template */ 19095b482a8SLen Brown 19195b482a8SLen Brown status = acpi_ut_get_resource_end_tag(operand1, &end_tag); 19295b482a8SLen Brown if (ACPI_FAILURE(status)) { 19395b482a8SLen Brown return_ACPI_STATUS(status); 19495b482a8SLen Brown } 19595b482a8SLen Brown 19695b482a8SLen Brown length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer); 19795b482a8SLen Brown 19895b482a8SLen Brown /* Combine both lengths, minimum size will be 2 for end_tag */ 19995b482a8SLen Brown 20095b482a8SLen Brown new_length = length0 + length1 + sizeof(struct aml_resource_end_tag); 20195b482a8SLen Brown 20295b482a8SLen Brown /* Create a new buffer object for the result (with one end_tag) */ 20395b482a8SLen Brown 20495b482a8SLen Brown return_desc = acpi_ut_create_buffer_object(new_length); 20595b482a8SLen Brown if (!return_desc) { 20695b482a8SLen Brown return_ACPI_STATUS(AE_NO_MEMORY); 20795b482a8SLen Brown } 20895b482a8SLen Brown 20995b482a8SLen Brown /* 21095b482a8SLen Brown * Copy the templates to the new buffer, 0 first, then 1 follows. One 21195b482a8SLen Brown * end_tag descriptor is copied from Operand1. 21295b482a8SLen Brown */ 21395b482a8SLen Brown new_buf = return_desc->buffer.pointer; 21495b482a8SLen Brown ACPI_MEMCPY(new_buf, operand0->buffer.pointer, length0); 21595b482a8SLen Brown ACPI_MEMCPY(new_buf + length0, operand1->buffer.pointer, length1); 21695b482a8SLen Brown 21795b482a8SLen Brown /* Insert end_tag and set the checksum to zero, means "ignore checksum" */ 21895b482a8SLen Brown 21995b482a8SLen Brown new_buf[new_length - 1] = 0; 22095b482a8SLen Brown new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1; 22195b482a8SLen Brown 22295b482a8SLen Brown /* Return the completed resource template */ 22395b482a8SLen Brown 22495b482a8SLen Brown *actual_return_desc = return_desc; 22595b482a8SLen Brown return_ACPI_STATUS(AE_OK); 22695b482a8SLen Brown } 22795b482a8SLen Brown 22895b482a8SLen Brown /******************************************************************************* 22995b482a8SLen Brown * 23095b482a8SLen Brown * FUNCTION: acpi_ex_do_concatenate 23195b482a8SLen Brown * 23295b482a8SLen Brown * PARAMETERS: Operand0 - First source object 23395b482a8SLen Brown * Operand1 - Second source object 23495b482a8SLen Brown * actual_return_desc - Where to place the return object 23595b482a8SLen Brown * walk_state - Current walk state 23695b482a8SLen Brown * 23795b482a8SLen Brown * RETURN: Status 23895b482a8SLen Brown * 23995b482a8SLen Brown * DESCRIPTION: Concatenate two objects OF THE SAME TYPE. 24095b482a8SLen Brown * 24195b482a8SLen Brown ******************************************************************************/ 24295b482a8SLen Brown 24395b482a8SLen Brown acpi_status 24495b482a8SLen Brown acpi_ex_do_concatenate(union acpi_operand_object *operand0, 24595b482a8SLen Brown union acpi_operand_object *operand1, 24695b482a8SLen Brown union acpi_operand_object **actual_return_desc, 24795b482a8SLen Brown struct acpi_walk_state *walk_state) 24895b482a8SLen Brown { 24995b482a8SLen Brown union acpi_operand_object *local_operand1 = operand1; 25095b482a8SLen Brown union acpi_operand_object *return_desc; 25195b482a8SLen Brown char *new_buf; 25295b482a8SLen Brown acpi_status status; 25395b482a8SLen Brown 25495b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_do_concatenate); 25595b482a8SLen Brown 25695b482a8SLen Brown /* 25795b482a8SLen Brown * Convert the second operand if necessary. The first operand 25895b482a8SLen Brown * determines the type of the second operand, (See the Data Types 25995b482a8SLen Brown * section of the ACPI specification.) Both object types are 26095b482a8SLen Brown * guaranteed to be either Integer/String/Buffer by the operand 26195b482a8SLen Brown * resolution mechanism. 26295b482a8SLen Brown */ 26395b482a8SLen Brown switch (ACPI_GET_OBJECT_TYPE(operand0)) { 26495b482a8SLen Brown case ACPI_TYPE_INTEGER: 26595b482a8SLen Brown status = 26695b482a8SLen Brown acpi_ex_convert_to_integer(operand1, &local_operand1, 16); 26795b482a8SLen Brown break; 26895b482a8SLen Brown 26995b482a8SLen Brown case ACPI_TYPE_STRING: 27095b482a8SLen Brown status = acpi_ex_convert_to_string(operand1, &local_operand1, 27195b482a8SLen Brown ACPI_IMPLICIT_CONVERT_HEX); 27295b482a8SLen Brown break; 27395b482a8SLen Brown 27495b482a8SLen Brown case ACPI_TYPE_BUFFER: 27595b482a8SLen Brown status = acpi_ex_convert_to_buffer(operand1, &local_operand1); 27695b482a8SLen Brown break; 27795b482a8SLen Brown 27895b482a8SLen Brown default: 27995b482a8SLen Brown ACPI_ERROR((AE_INFO, "Invalid object type: %X", 28095b482a8SLen Brown ACPI_GET_OBJECT_TYPE(operand0))); 28195b482a8SLen Brown status = AE_AML_INTERNAL; 28295b482a8SLen Brown } 28395b482a8SLen Brown 28495b482a8SLen Brown if (ACPI_FAILURE(status)) { 28595b482a8SLen Brown goto cleanup; 28695b482a8SLen Brown } 28795b482a8SLen Brown 28895b482a8SLen Brown /* 28995b482a8SLen Brown * Both operands are now known to be the same object type 29095b482a8SLen Brown * (Both are Integer, String, or Buffer), and we can now perform the 29195b482a8SLen Brown * concatenation. 29295b482a8SLen Brown */ 29395b482a8SLen Brown 29495b482a8SLen Brown /* 29595b482a8SLen Brown * There are three cases to handle: 29695b482a8SLen Brown * 29795b482a8SLen Brown * 1) Two Integers concatenated to produce a new Buffer 29895b482a8SLen Brown * 2) Two Strings concatenated to produce a new String 29995b482a8SLen Brown * 3) Two Buffers concatenated to produce a new Buffer 30095b482a8SLen Brown */ 30195b482a8SLen Brown switch (ACPI_GET_OBJECT_TYPE(operand0)) { 30295b482a8SLen Brown case ACPI_TYPE_INTEGER: 30395b482a8SLen Brown 30495b482a8SLen Brown /* Result of two Integers is a Buffer */ 30595b482a8SLen Brown /* Need enough buffer space for two integers */ 30695b482a8SLen Brown 30795b482a8SLen Brown return_desc = acpi_ut_create_buffer_object((acpi_size) 30895b482a8SLen Brown ACPI_MUL_2 30995b482a8SLen Brown (acpi_gbl_integer_byte_width)); 31095b482a8SLen Brown if (!return_desc) { 31195b482a8SLen Brown status = AE_NO_MEMORY; 31295b482a8SLen Brown goto cleanup; 31395b482a8SLen Brown } 31495b482a8SLen Brown 31595b482a8SLen Brown new_buf = (char *)return_desc->buffer.pointer; 31695b482a8SLen Brown 31795b482a8SLen Brown /* Copy the first integer, LSB first */ 31895b482a8SLen Brown 31995b482a8SLen Brown ACPI_MEMCPY(new_buf, &operand0->integer.value, 32095b482a8SLen Brown acpi_gbl_integer_byte_width); 32195b482a8SLen Brown 32295b482a8SLen Brown /* Copy the second integer (LSB first) after the first */ 32395b482a8SLen Brown 32495b482a8SLen Brown ACPI_MEMCPY(new_buf + acpi_gbl_integer_byte_width, 32595b482a8SLen Brown &local_operand1->integer.value, 32695b482a8SLen Brown acpi_gbl_integer_byte_width); 32795b482a8SLen Brown break; 32895b482a8SLen Brown 32995b482a8SLen Brown case ACPI_TYPE_STRING: 33095b482a8SLen Brown 33195b482a8SLen Brown /* Result of two Strings is a String */ 33295b482a8SLen Brown 33395b482a8SLen Brown return_desc = acpi_ut_create_string_object(((acpi_size) 33495b482a8SLen Brown operand0->string. 33595b482a8SLen Brown length + 33695b482a8SLen Brown local_operand1-> 33795b482a8SLen Brown string.length)); 33895b482a8SLen Brown if (!return_desc) { 33995b482a8SLen Brown status = AE_NO_MEMORY; 34095b482a8SLen Brown goto cleanup; 34195b482a8SLen Brown } 34295b482a8SLen Brown 34395b482a8SLen Brown new_buf = return_desc->string.pointer; 34495b482a8SLen Brown 34595b482a8SLen Brown /* Concatenate the strings */ 34695b482a8SLen Brown 34795b482a8SLen Brown ACPI_STRCPY(new_buf, operand0->string.pointer); 34895b482a8SLen Brown ACPI_STRCPY(new_buf + operand0->string.length, 34995b482a8SLen Brown local_operand1->string.pointer); 35095b482a8SLen Brown break; 35195b482a8SLen Brown 35295b482a8SLen Brown case ACPI_TYPE_BUFFER: 35395b482a8SLen Brown 35495b482a8SLen Brown /* Result of two Buffers is a Buffer */ 35595b482a8SLen Brown 35695b482a8SLen Brown return_desc = acpi_ut_create_buffer_object(((acpi_size) 35795b482a8SLen Brown operand0->buffer. 35895b482a8SLen Brown length + 35995b482a8SLen Brown local_operand1-> 36095b482a8SLen Brown buffer.length)); 36195b482a8SLen Brown if (!return_desc) { 36295b482a8SLen Brown status = AE_NO_MEMORY; 36395b482a8SLen Brown goto cleanup; 36495b482a8SLen Brown } 36595b482a8SLen Brown 36695b482a8SLen Brown new_buf = (char *)return_desc->buffer.pointer; 36795b482a8SLen Brown 36895b482a8SLen Brown /* Concatenate the buffers */ 36995b482a8SLen Brown 37095b482a8SLen Brown ACPI_MEMCPY(new_buf, operand0->buffer.pointer, 37195b482a8SLen Brown operand0->buffer.length); 37295b482a8SLen Brown ACPI_MEMCPY(new_buf + operand0->buffer.length, 37395b482a8SLen Brown local_operand1->buffer.pointer, 37495b482a8SLen Brown local_operand1->buffer.length); 37595b482a8SLen Brown break; 37695b482a8SLen Brown 37795b482a8SLen Brown default: 37895b482a8SLen Brown 37995b482a8SLen Brown /* Invalid object type, should not happen here */ 38095b482a8SLen Brown 38195b482a8SLen Brown ACPI_ERROR((AE_INFO, "Invalid object type: %X", 38295b482a8SLen Brown ACPI_GET_OBJECT_TYPE(operand0))); 38395b482a8SLen Brown status = AE_AML_INTERNAL; 38495b482a8SLen Brown goto cleanup; 38595b482a8SLen Brown } 38695b482a8SLen Brown 38795b482a8SLen Brown *actual_return_desc = return_desc; 38895b482a8SLen Brown 38995b482a8SLen Brown cleanup: 39095b482a8SLen Brown if (local_operand1 != operand1) { 39195b482a8SLen Brown acpi_ut_remove_reference(local_operand1); 39295b482a8SLen Brown } 39395b482a8SLen Brown return_ACPI_STATUS(status); 39495b482a8SLen Brown } 39595b482a8SLen Brown 39695b482a8SLen Brown /******************************************************************************* 39795b482a8SLen Brown * 39895b482a8SLen Brown * FUNCTION: acpi_ex_do_math_op 39995b482a8SLen Brown * 40095b482a8SLen Brown * PARAMETERS: Opcode - AML opcode 40195b482a8SLen Brown * Integer0 - Integer operand #0 40295b482a8SLen Brown * Integer1 - Integer operand #1 40395b482a8SLen Brown * 40495b482a8SLen Brown * RETURN: Integer result of the operation 40595b482a8SLen Brown * 40695b482a8SLen Brown * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the 40795b482a8SLen Brown * math functions here is to prevent a lot of pointer dereferencing 40895b482a8SLen Brown * to obtain the operands. 40995b482a8SLen Brown * 41095b482a8SLen Brown ******************************************************************************/ 41195b482a8SLen Brown 41295b482a8SLen Brown acpi_integer 41395b482a8SLen Brown acpi_ex_do_math_op(u16 opcode, acpi_integer integer0, acpi_integer integer1) 41495b482a8SLen Brown { 41595b482a8SLen Brown 41695b482a8SLen Brown ACPI_FUNCTION_ENTRY(); 41795b482a8SLen Brown 41895b482a8SLen Brown switch (opcode) { 41995b482a8SLen Brown case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */ 42095b482a8SLen Brown 42195b482a8SLen Brown return (integer0 + integer1); 42295b482a8SLen Brown 42395b482a8SLen Brown case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */ 42495b482a8SLen Brown 42595b482a8SLen Brown return (integer0 & integer1); 42695b482a8SLen Brown 42795b482a8SLen Brown case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */ 42895b482a8SLen Brown 42995b482a8SLen Brown return (~(integer0 & integer1)); 43095b482a8SLen Brown 43195b482a8SLen Brown case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */ 43295b482a8SLen Brown 43395b482a8SLen Brown return (integer0 | integer1); 43495b482a8SLen Brown 43595b482a8SLen Brown case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */ 43695b482a8SLen Brown 43795b482a8SLen Brown return (~(integer0 | integer1)); 43895b482a8SLen Brown 43995b482a8SLen Brown case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */ 44095b482a8SLen Brown 44195b482a8SLen Brown return (integer0 ^ integer1); 44295b482a8SLen Brown 44395b482a8SLen Brown case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */ 44495b482a8SLen Brown 44595b482a8SLen Brown return (integer0 * integer1); 44695b482a8SLen Brown 44795b482a8SLen Brown case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */ 44895b482a8SLen Brown 44995b482a8SLen Brown /* 45095b482a8SLen Brown * We need to check if the shiftcount is larger than the integer bit 45195b482a8SLen Brown * width since the behavior of this is not well-defined in the C language. 45295b482a8SLen Brown */ 45395b482a8SLen Brown if (integer1 >= acpi_gbl_integer_bit_width) { 45495b482a8SLen Brown return (0); 45595b482a8SLen Brown } 45695b482a8SLen Brown return (integer0 << integer1); 45795b482a8SLen Brown 45895b482a8SLen Brown case AML_SHIFT_RIGHT_OP: /* shift_right (Operand, shift_count, Result) */ 45995b482a8SLen Brown 46095b482a8SLen Brown /* 46195b482a8SLen Brown * We need to check if the shiftcount is larger than the integer bit 46295b482a8SLen Brown * width since the behavior of this is not well-defined in the C language. 46395b482a8SLen Brown */ 46495b482a8SLen Brown if (integer1 >= acpi_gbl_integer_bit_width) { 46595b482a8SLen Brown return (0); 46695b482a8SLen Brown } 46795b482a8SLen Brown return (integer0 >> integer1); 46895b482a8SLen Brown 46995b482a8SLen Brown case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */ 47095b482a8SLen Brown 47195b482a8SLen Brown return (integer0 - integer1); 47295b482a8SLen Brown 47395b482a8SLen Brown default: 47495b482a8SLen Brown 47595b482a8SLen Brown return (0); 47695b482a8SLen Brown } 47795b482a8SLen Brown } 47895b482a8SLen Brown 47995b482a8SLen Brown /******************************************************************************* 48095b482a8SLen Brown * 48195b482a8SLen Brown * FUNCTION: acpi_ex_do_logical_numeric_op 48295b482a8SLen Brown * 48395b482a8SLen Brown * PARAMETERS: Opcode - AML opcode 48495b482a8SLen Brown * Integer0 - Integer operand #0 48595b482a8SLen Brown * Integer1 - Integer operand #1 48695b482a8SLen Brown * logical_result - TRUE/FALSE result of the operation 48795b482a8SLen Brown * 48895b482a8SLen Brown * RETURN: Status 48995b482a8SLen Brown * 49095b482a8SLen Brown * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric 49195b482a8SLen Brown * operators (LAnd and LOr), both operands must be integers. 49295b482a8SLen Brown * 49395b482a8SLen Brown * Note: cleanest machine code seems to be produced by the code 49495b482a8SLen Brown * below, rather than using statements of the form: 49595b482a8SLen Brown * Result = (Integer0 && Integer1); 49695b482a8SLen Brown * 49795b482a8SLen Brown ******************************************************************************/ 49895b482a8SLen Brown 49995b482a8SLen Brown acpi_status 50095b482a8SLen Brown acpi_ex_do_logical_numeric_op(u16 opcode, 50195b482a8SLen Brown acpi_integer integer0, 50295b482a8SLen Brown acpi_integer integer1, u8 * logical_result) 50395b482a8SLen Brown { 50495b482a8SLen Brown acpi_status status = AE_OK; 50595b482a8SLen Brown u8 local_result = FALSE; 50695b482a8SLen Brown 50795b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_do_logical_numeric_op); 50895b482a8SLen Brown 50995b482a8SLen Brown switch (opcode) { 51095b482a8SLen Brown case AML_LAND_OP: /* LAnd (Integer0, Integer1) */ 51195b482a8SLen Brown 51295b482a8SLen Brown if (integer0 && integer1) { 51395b482a8SLen Brown local_result = TRUE; 51495b482a8SLen Brown } 51595b482a8SLen Brown break; 51695b482a8SLen Brown 51795b482a8SLen Brown case AML_LOR_OP: /* LOr (Integer0, Integer1) */ 51895b482a8SLen Brown 51995b482a8SLen Brown if (integer0 || integer1) { 52095b482a8SLen Brown local_result = TRUE; 52195b482a8SLen Brown } 52295b482a8SLen Brown break; 52395b482a8SLen Brown 52495b482a8SLen Brown default: 52595b482a8SLen Brown status = AE_AML_INTERNAL; 52695b482a8SLen Brown break; 52795b482a8SLen Brown } 52895b482a8SLen Brown 52995b482a8SLen Brown /* Return the logical result and status */ 53095b482a8SLen Brown 53195b482a8SLen Brown *logical_result = local_result; 53295b482a8SLen Brown return_ACPI_STATUS(status); 53395b482a8SLen Brown } 53495b482a8SLen Brown 53595b482a8SLen Brown /******************************************************************************* 53695b482a8SLen Brown * 53795b482a8SLen Brown * FUNCTION: acpi_ex_do_logical_op 53895b482a8SLen Brown * 53995b482a8SLen Brown * PARAMETERS: Opcode - AML opcode 54095b482a8SLen Brown * Operand0 - operand #0 54195b482a8SLen Brown * Operand1 - operand #1 54295b482a8SLen Brown * logical_result - TRUE/FALSE result of the operation 54395b482a8SLen Brown * 54495b482a8SLen Brown * RETURN: Status 54595b482a8SLen Brown * 54695b482a8SLen Brown * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the 54795b482a8SLen Brown * functions here is to prevent a lot of pointer dereferencing 54895b482a8SLen Brown * to obtain the operands and to simplify the generation of the 54995b482a8SLen Brown * logical value. For the Numeric operators (LAnd and LOr), both 55095b482a8SLen Brown * operands must be integers. For the other logical operators, 55195b482a8SLen Brown * operands can be any combination of Integer/String/Buffer. The 55295b482a8SLen Brown * first operand determines the type to which the second operand 55395b482a8SLen Brown * will be converted. 55495b482a8SLen Brown * 55595b482a8SLen Brown * Note: cleanest machine code seems to be produced by the code 55695b482a8SLen Brown * below, rather than using statements of the form: 55795b482a8SLen Brown * Result = (Operand0 == Operand1); 55895b482a8SLen Brown * 55995b482a8SLen Brown ******************************************************************************/ 56095b482a8SLen Brown 56195b482a8SLen Brown acpi_status 56295b482a8SLen Brown acpi_ex_do_logical_op(u16 opcode, 56395b482a8SLen Brown union acpi_operand_object *operand0, 56495b482a8SLen Brown union acpi_operand_object *operand1, u8 * logical_result) 56595b482a8SLen Brown { 56695b482a8SLen Brown union acpi_operand_object *local_operand1 = operand1; 56795b482a8SLen Brown acpi_integer integer0; 56895b482a8SLen Brown acpi_integer integer1; 56995b482a8SLen Brown u32 length0; 57095b482a8SLen Brown u32 length1; 57195b482a8SLen Brown acpi_status status = AE_OK; 57295b482a8SLen Brown u8 local_result = FALSE; 57395b482a8SLen Brown int compare; 57495b482a8SLen Brown 57595b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_do_logical_op); 57695b482a8SLen Brown 57795b482a8SLen Brown /* 57895b482a8SLen Brown * Convert the second operand if necessary. The first operand 57995b482a8SLen Brown * determines the type of the second operand, (See the Data Types 58095b482a8SLen Brown * section of the ACPI 3.0+ specification.) Both object types are 58195b482a8SLen Brown * guaranteed to be either Integer/String/Buffer by the operand 58295b482a8SLen Brown * resolution mechanism. 58395b482a8SLen Brown */ 58495b482a8SLen Brown switch (ACPI_GET_OBJECT_TYPE(operand0)) { 58595b482a8SLen Brown case ACPI_TYPE_INTEGER: 58695b482a8SLen Brown status = 58795b482a8SLen Brown acpi_ex_convert_to_integer(operand1, &local_operand1, 16); 58895b482a8SLen Brown break; 58995b482a8SLen Brown 59095b482a8SLen Brown case ACPI_TYPE_STRING: 59195b482a8SLen Brown status = acpi_ex_convert_to_string(operand1, &local_operand1, 59295b482a8SLen Brown ACPI_IMPLICIT_CONVERT_HEX); 59395b482a8SLen Brown break; 59495b482a8SLen Brown 59595b482a8SLen Brown case ACPI_TYPE_BUFFER: 59695b482a8SLen Brown status = acpi_ex_convert_to_buffer(operand1, &local_operand1); 59795b482a8SLen Brown break; 59895b482a8SLen Brown 59995b482a8SLen Brown default: 60095b482a8SLen Brown status = AE_AML_INTERNAL; 60195b482a8SLen Brown break; 60295b482a8SLen Brown } 60395b482a8SLen Brown 60495b482a8SLen Brown if (ACPI_FAILURE(status)) { 60595b482a8SLen Brown goto cleanup; 60695b482a8SLen Brown } 60795b482a8SLen Brown 60895b482a8SLen Brown /* 60995b482a8SLen Brown * Two cases: 1) Both Integers, 2) Both Strings or Buffers 61095b482a8SLen Brown */ 61195b482a8SLen Brown if (ACPI_GET_OBJECT_TYPE(operand0) == ACPI_TYPE_INTEGER) { 61295b482a8SLen Brown /* 61395b482a8SLen Brown * 1) Both operands are of type integer 61495b482a8SLen Brown * Note: local_operand1 may have changed above 61595b482a8SLen Brown */ 61695b482a8SLen Brown integer0 = operand0->integer.value; 61795b482a8SLen Brown integer1 = local_operand1->integer.value; 61895b482a8SLen Brown 61995b482a8SLen Brown switch (opcode) { 62095b482a8SLen Brown case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */ 62195b482a8SLen Brown 62295b482a8SLen Brown if (integer0 == integer1) { 62395b482a8SLen Brown local_result = TRUE; 62495b482a8SLen Brown } 62595b482a8SLen Brown break; 62695b482a8SLen Brown 62795b482a8SLen Brown case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */ 62895b482a8SLen Brown 62995b482a8SLen Brown if (integer0 > integer1) { 63095b482a8SLen Brown local_result = TRUE; 63195b482a8SLen Brown } 63295b482a8SLen Brown break; 63395b482a8SLen Brown 63495b482a8SLen Brown case AML_LLESS_OP: /* LLess (Operand0, Operand1) */ 63595b482a8SLen Brown 63695b482a8SLen Brown if (integer0 < integer1) { 63795b482a8SLen Brown local_result = TRUE; 63895b482a8SLen Brown } 63995b482a8SLen Brown break; 64095b482a8SLen Brown 64195b482a8SLen Brown default: 64295b482a8SLen Brown status = AE_AML_INTERNAL; 64395b482a8SLen Brown break; 64495b482a8SLen Brown } 64595b482a8SLen Brown } else { 64695b482a8SLen Brown /* 64795b482a8SLen Brown * 2) Both operands are Strings or both are Buffers 64895b482a8SLen Brown * Note: Code below takes advantage of common Buffer/String 64995b482a8SLen Brown * object fields. local_operand1 may have changed above. Use 65095b482a8SLen Brown * memcmp to handle nulls in buffers. 65195b482a8SLen Brown */ 65295b482a8SLen Brown length0 = operand0->buffer.length; 65395b482a8SLen Brown length1 = local_operand1->buffer.length; 65495b482a8SLen Brown 65595b482a8SLen Brown /* Lexicographic compare: compare the data bytes */ 65695b482a8SLen Brown 65795b482a8SLen Brown compare = ACPI_MEMCMP(operand0->buffer.pointer, 65895b482a8SLen Brown local_operand1->buffer.pointer, 65995b482a8SLen Brown (length0 > length1) ? length1 : length0); 66095b482a8SLen Brown 66195b482a8SLen Brown switch (opcode) { 66295b482a8SLen Brown case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */ 66395b482a8SLen Brown 66495b482a8SLen Brown /* Length and all bytes must be equal */ 66595b482a8SLen Brown 66695b482a8SLen Brown if ((length0 == length1) && (compare == 0)) { 66795b482a8SLen Brown 66895b482a8SLen Brown /* Length and all bytes match ==> TRUE */ 66995b482a8SLen Brown 67095b482a8SLen Brown local_result = TRUE; 67195b482a8SLen Brown } 67295b482a8SLen Brown break; 67395b482a8SLen Brown 67495b482a8SLen Brown case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */ 67595b482a8SLen Brown 67695b482a8SLen Brown if (compare > 0) { 67795b482a8SLen Brown local_result = TRUE; 67895b482a8SLen Brown goto cleanup; /* TRUE */ 67995b482a8SLen Brown } 68095b482a8SLen Brown if (compare < 0) { 68195b482a8SLen Brown goto cleanup; /* FALSE */ 68295b482a8SLen Brown } 68395b482a8SLen Brown 68495b482a8SLen Brown /* Bytes match (to shortest length), compare lengths */ 68595b482a8SLen Brown 68695b482a8SLen Brown if (length0 > length1) { 68795b482a8SLen Brown local_result = TRUE; 68895b482a8SLen Brown } 68995b482a8SLen Brown break; 69095b482a8SLen Brown 69195b482a8SLen Brown case AML_LLESS_OP: /* LLess (Operand0, Operand1) */ 69295b482a8SLen Brown 69395b482a8SLen Brown if (compare > 0) { 69495b482a8SLen Brown goto cleanup; /* FALSE */ 69595b482a8SLen Brown } 69695b482a8SLen Brown if (compare < 0) { 69795b482a8SLen Brown local_result = TRUE; 69895b482a8SLen Brown goto cleanup; /* TRUE */ 69995b482a8SLen Brown } 70095b482a8SLen Brown 70195b482a8SLen Brown /* Bytes match (to shortest length), compare lengths */ 70295b482a8SLen Brown 70395b482a8SLen Brown if (length0 < length1) { 70495b482a8SLen Brown local_result = TRUE; 70595b482a8SLen Brown } 70695b482a8SLen Brown break; 70795b482a8SLen Brown 70895b482a8SLen Brown default: 70995b482a8SLen Brown status = AE_AML_INTERNAL; 71095b482a8SLen Brown break; 71195b482a8SLen Brown } 71295b482a8SLen Brown } 71395b482a8SLen Brown 71495b482a8SLen Brown cleanup: 71595b482a8SLen Brown 71695b482a8SLen Brown /* New object was created if implicit conversion performed - delete */ 71795b482a8SLen Brown 71895b482a8SLen Brown if (local_operand1 != operand1) { 71995b482a8SLen Brown acpi_ut_remove_reference(local_operand1); 72095b482a8SLen Brown } 72195b482a8SLen Brown 72295b482a8SLen Brown /* Return the logical result and status */ 72395b482a8SLen Brown 72495b482a8SLen Brown *logical_result = local_result; 72595b482a8SLen Brown return_ACPI_STATUS(status); 72695b482a8SLen Brown } 727