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c501d8112c
svn path=/branches/aicom-network-fixes/; revision=34994
512 lines
12 KiB
C
512 lines
12 KiB
C
/******************************************************************************
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*
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* Module Name: amconvrt - Object conversion routines
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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000, 2001 R. Byron Moore
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <acpi.h>
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#define _COMPONENT ACPI_EXECUTER
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MODULE_NAME ("amconvrt")
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/*******************************************************************************
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*
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* FUNCTION: Acpi_aml_convert_to_integer
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*
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* PARAMETERS: *Obj_desc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* Walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an ACPI Object to an integer.
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_aml_convert_to_integer (
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ACPI_OPERAND_OBJECT **obj_desc,
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ACPI_WALK_STATE *walk_state)
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{
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u32 i;
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ACPI_OPERAND_OBJECT *ret_desc;
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u32 count;
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char *pointer;
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ACPI_INTEGER result;
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u32 integer_size = sizeof (ACPI_INTEGER);
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switch ((*obj_desc)->common.type) {
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case ACPI_TYPE_INTEGER:
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return (AE_OK);
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case ACPI_TYPE_STRING:
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pointer = (*obj_desc)->string.pointer;
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count = (*obj_desc)->string.length;
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break;
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case ACPI_TYPE_BUFFER:
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pointer = (char *) (*obj_desc)->buffer.pointer;
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count = (*obj_desc)->buffer.length;
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break;
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default:
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return (AE_TYPE);
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}
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/*
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* Create a new integer
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*/
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ret_desc = acpi_cm_create_internal_object (ACPI_TYPE_INTEGER);
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if (!ret_desc) {
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return (AE_NO_MEMORY);
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}
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/* Handle both ACPI 1.0 and ACPI 2.0 Integer widths */
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if (walk_state->method_node->flags & ANOBJ_DATA_WIDTH_32) {
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/*
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* We are running a method that exists in a 32-bit ACPI table.
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* Truncate the value to 32 bits by zeroing out the upper 32-bit field
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*/
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integer_size = sizeof (u32);
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}
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/*
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* Convert the buffer/string to an integer. Note that both buffers and
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* strings are treated as raw data - we don't convert ascii to hex for
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* strings.
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*
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* There are two terminating conditions for the loop:
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* 1) The size of an integer has been reached, or
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* 2) The end of the buffer or string has been reached
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*/
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result = 0;
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/* Transfer no more than an integer's worth of data */
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if (count > integer_size) {
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count = integer_size;
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}
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/*
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* String conversion is different than Buffer conversion
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*/
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switch ((*obj_desc)->common.type) {
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case ACPI_TYPE_STRING:
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/* TBD: Need to use 64-bit STRTOUL */
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/*
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* Convert string to an integer
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* String must be hexadecimal as per the ACPI specification
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*/
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result = STRTOUL (pointer, NULL, 16);
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break;
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case ACPI_TYPE_BUFFER:
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/*
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* Buffer conversion - we simply grab enough raw data from the
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* buffer to fill an integer
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*/
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for (i = 0; i < count; i++) {
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/*
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* Get next byte and shift it into the Result.
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* Little endian is used, meaning that the first byte of the buffer
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* is the LSB of the integer
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*/
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result |= (((ACPI_INTEGER) pointer[i]) << (i * 8));
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}
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break;
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}
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/* Save the Result, delete original descriptor, store new descriptor */
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ret_desc->integer.value = result;
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if (walk_state->opcode != AML_STORE_OP) {
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acpi_cm_remove_reference (*obj_desc);
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}
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*obj_desc = ret_desc;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_aml_convert_to_buffer
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*
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* PARAMETERS: *Obj_desc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* Walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an ACPI Object to an Buffer
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_aml_convert_to_buffer (
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ACPI_OPERAND_OBJECT **obj_desc,
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ACPI_WALK_STATE *walk_state)
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{
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ACPI_OPERAND_OBJECT *ret_desc;
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u32 i;
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u32 integer_size = sizeof (ACPI_INTEGER);
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u8 *new_buf;
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switch ((*obj_desc)->common.type) {
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case ACPI_TYPE_INTEGER:
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/*
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* Create a new Buffer
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*/
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ret_desc = acpi_cm_create_internal_object (ACPI_TYPE_BUFFER);
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if (!ret_desc) {
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return (AE_NO_MEMORY);
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}
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/* Handle both ACPI 1.0 and ACPI 2.0 Integer widths */
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if (walk_state->method_node->flags & ANOBJ_DATA_WIDTH_32) {
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/*
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* We are running a method that exists in a 32-bit ACPI table.
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* Truncate the value to 32 bits by zeroing out the upper
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* 32-bit field
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*/
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integer_size = sizeof (u32);
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}
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/* Need enough space for one integers */
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ret_desc->buffer.length = integer_size;
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new_buf = acpi_cm_callocate (integer_size);
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if (!new_buf) {
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REPORT_ERROR
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(("Aml_exec_dyadic2_r/Concat_op: Buffer allocation failure\n"));
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acpi_cm_remove_reference (ret_desc);
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return (AE_NO_MEMORY);
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}
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/* Copy the integer to the buffer */
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for (i = 0; i < integer_size; i++) {
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new_buf[i] = (u8) ((*obj_desc)->integer.value >> (i * 8));
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}
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ret_desc->buffer.pointer = new_buf;
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/* Return the new buffer descriptor */
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if (walk_state->opcode != AML_STORE_OP) {
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acpi_cm_remove_reference (*obj_desc);
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}
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*obj_desc = ret_desc;
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break;
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case ACPI_TYPE_STRING:
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break;
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case ACPI_TYPE_BUFFER:
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break;
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default:
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return (AE_TYPE);
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break;
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_aml_convert_to_string
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*
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* PARAMETERS: *Obj_desc - Object to be converted. Must be an
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* Integer, Buffer, or String
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* Walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Convert an ACPI Object to a string
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_aml_convert_to_string (
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ACPI_OPERAND_OBJECT **obj_desc,
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ACPI_WALK_STATE *walk_state)
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{
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ACPI_OPERAND_OBJECT *ret_desc;
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u32 i;
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u32 index;
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u32 integer_size = sizeof (ACPI_INTEGER);
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u8 *new_buf;
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u8 *pointer;
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switch ((*obj_desc)->common.type) {
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case ACPI_TYPE_INTEGER:
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/*
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* Create a new String
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*/
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ret_desc = acpi_cm_create_internal_object (ACPI_TYPE_STRING);
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if (!ret_desc) {
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return (AE_NO_MEMORY);
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}
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/* Handle both ACPI 1.0 and ACPI 2.0 Integer widths */
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if (walk_state->method_node->flags & ANOBJ_DATA_WIDTH_32) {
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/*
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* We are running a method that exists in a 32-bit ACPI table.
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* Truncate the value to 32 bits by zeroing out the upper
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* 32-bit field
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*/
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integer_size = sizeof (u32);
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}
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/* Need enough space for one ASCII integer plus null terminator */
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ret_desc->string.length = (integer_size * 2) + 1;
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new_buf = acpi_cm_callocate (ret_desc->string.length);
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if (!new_buf) {
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REPORT_ERROR
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(("Aml_exec_dyadic2_r/Concat_op: Buffer allocation failure\n"));
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acpi_cm_remove_reference (ret_desc);
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return (AE_NO_MEMORY);
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}
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/* Copy the integer to the buffer */
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for (i = 0; i < (integer_size * 2); i++) {
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new_buf[i] = acpi_gbl_hex_to_ascii [((*obj_desc)->integer.value >> (i * 4)) & 0xF];
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}
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/* Null terminate */
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new_buf [i] = 0;
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ret_desc->buffer.pointer = new_buf;
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/* Return the new buffer descriptor */
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if (walk_state->opcode != AML_STORE_OP) {
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acpi_cm_remove_reference (*obj_desc);
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}
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*obj_desc = ret_desc;
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return (AE_OK);
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case ACPI_TYPE_BUFFER:
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if (((*obj_desc)->buffer.length * 3) > ACPI_MAX_STRING_CONVERSION) {
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return (AE_AML_STRING_LIMIT);
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}
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/*
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* Create a new String
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*/
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ret_desc = acpi_cm_create_internal_object (ACPI_TYPE_STRING);
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if (!ret_desc) {
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return (AE_NO_MEMORY);
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}
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/* Need enough space for one ASCII integer plus null terminator */
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ret_desc->string.length = (*obj_desc)->buffer.length * 3;
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new_buf = acpi_cm_callocate (ret_desc->string.length + 1);
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if (!new_buf) {
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REPORT_ERROR
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(("Aml_exec_dyadic2_r/Concat_op: Buffer allocation failure\n"));
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acpi_cm_remove_reference (ret_desc);
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return (AE_NO_MEMORY);
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}
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/*
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* Convert each byte of the buffer to two ASCII characters plus a space.
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*/
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pointer = (*obj_desc)->buffer.pointer;
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index = 0;
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for (i = 0; i < (*obj_desc)->buffer.length; i++) {
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new_buf[index + 0] = acpi_gbl_hex_to_ascii [pointer[i] & 0x0F];
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new_buf[index + 1] = acpi_gbl_hex_to_ascii [(pointer[i] >> 4) & 0x0F];
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new_buf[index + 2] = ' ';
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index += 3;
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}
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/* Null terminate */
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new_buf [index] = 0;
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ret_desc->buffer.pointer = new_buf;
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/* Return the new buffer descriptor */
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if (walk_state->opcode != AML_STORE_OP) {
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acpi_cm_remove_reference (*obj_desc);
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}
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*obj_desc = ret_desc;
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break;
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case ACPI_TYPE_STRING:
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break;
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default:
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return (AE_TYPE);
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break;
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: Acpi_aml_convert_to_target_type
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*
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* PARAMETERS: *Obj_desc - Object to be converted.
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* Walk_state - Current method state
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*
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* RETURN: Status
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*
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* DESCRIPTION:
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*
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******************************************************************************/
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ACPI_STATUS
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acpi_aml_convert_to_target_type (
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OBJECT_TYPE_INTERNAL destination_type,
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ACPI_OPERAND_OBJECT **obj_desc,
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ACPI_WALK_STATE *walk_state)
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{
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ACPI_STATUS status = AE_OK;
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/*
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* If required by the target,
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* perform implicit conversion on the source before we store it.
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*/
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switch (GET_CURRENT_ARG_TYPE (walk_state->op_info->runtime_args)) {
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case ARGI_SIMPLE_TARGET:
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case ARGI_FIXED_TARGET:
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case ARGI_INTEGER_REF: /* Handles Increment, Decrement cases */
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switch (destination_type) {
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case INTERNAL_TYPE_DEF_FIELD:
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/*
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* Named field can always handle conversions
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*/
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break;
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default:
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/* No conversion allowed for these types */
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if (destination_type != (*obj_desc)->common.type) {
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status = AE_TYPE;
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}
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}
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break;
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case ARGI_TARGETREF:
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switch (destination_type) {
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_FIELD_UNIT:
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case INTERNAL_TYPE_BANK_FIELD:
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case INTERNAL_TYPE_INDEX_FIELD:
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/*
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* These types require an Integer operand. We can convert
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* a Buffer or a String to an Integer if necessary.
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*/
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status = acpi_aml_convert_to_integer (obj_desc, walk_state);
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break;
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case ACPI_TYPE_STRING:
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/*
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* The operand must be a String. We can convert an
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* Integer or Buffer if necessary
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*/
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status = acpi_aml_convert_to_string (obj_desc, walk_state);
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break;
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case ACPI_TYPE_BUFFER:
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/*
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* The operand must be a String. We can convert an
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* Integer or Buffer if necessary
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*/
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status = acpi_aml_convert_to_buffer (obj_desc, walk_state);
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break;
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}
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break;
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case ARGI_REFERENCE:
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/*
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* Create_xxxx_field cases - we are storing the field object into the name
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*/
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break;
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default:
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status = AE_AML_INTERNAL;
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}
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/*
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* Source-to-Target conversion semantics:
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*
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* If conversion to the target type cannot be performed, then simply
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* overwrite the target with the new object and type.
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*/
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if (status == AE_TYPE) {
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status = AE_OK;
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}
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return (status);
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}
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