diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/acpi/executer |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/acpi/executer')
24 files changed, 11955 insertions, 0 deletions
diff --git a/drivers/acpi/executer/Makefile b/drivers/acpi/executer/Makefile new file mode 100644 index 00000000000..e09998aa012 --- /dev/null +++ b/drivers/acpi/executer/Makefile @@ -0,0 +1,10 @@ +# +# Makefile for all Linux ACPI interpreter subdirectories +# + +obj-y := exconfig.o exfield.o exnames.o exoparg6.o exresolv.o exstorob.o\ + exconvrt.o exfldio.o exoparg1.o exprep.o exresop.o exsystem.o\ + excreate.o exmisc.o exoparg2.o exregion.o exstore.o exutils.o \ + exdump.o exmutex.o exoparg3.o exresnte.o exstoren.o + +EXTRA_CFLAGS += $(ACPI_CFLAGS) diff --git a/drivers/acpi/executer/exconfig.c b/drivers/acpi/executer/exconfig.c new file mode 100644 index 00000000000..ac3c061967f --- /dev/null +++ b/drivers/acpi/executer/exconfig.c @@ -0,0 +1,487 @@ +/****************************************************************************** + * + * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes) + * + *****************************************************************************/ + +/* + * 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/acinterp.h> +#include <acpi/amlcode.h> +#include <acpi/acnamesp.h> +#include <acpi/acevents.h> +#include <acpi/actables.h> +#include <acpi/acdispat.h> + + +#define _COMPONENT ACPI_EXECUTER + ACPI_MODULE_NAME ("exconfig") + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_add_table + * + * PARAMETERS: Table - Pointer to raw table + * parent_node - Where to load the table (scope) + * ddb_handle - Where to return the table handle. + * + * RETURN: Status + * + * DESCRIPTION: Common function to Install and Load an ACPI table with a + * returned table handle. + * + ******************************************************************************/ + +acpi_status +acpi_ex_add_table ( + struct acpi_table_header *table, + struct acpi_namespace_node *parent_node, + union acpi_operand_object **ddb_handle) +{ + acpi_status status; + struct acpi_table_desc table_info; + union acpi_operand_object *obj_desc; + + + ACPI_FUNCTION_TRACE ("ex_add_table"); + + + /* Create an object to be the table handle */ + + obj_desc = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_REFERENCE); + if (!obj_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Install the new table into the local data structures */ + + ACPI_MEMSET (&table_info, 0, sizeof (struct acpi_table_desc)); + + table_info.type = ACPI_TABLE_SSDT; + table_info.pointer = table; + table_info.length = (acpi_size) table->length; + table_info.allocation = ACPI_MEM_ALLOCATED; + + status = acpi_tb_install_table (&table_info); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* Add the table to the namespace */ + + status = acpi_ns_load_table (table_info.installed_desc, parent_node); + if (ACPI_FAILURE (status)) { + /* Uninstall table on error */ + + (void) acpi_tb_uninstall_table (table_info.installed_desc); + goto cleanup; + } + + /* Init the table handle */ + + obj_desc->reference.opcode = AML_LOAD_OP; + obj_desc->reference.object = table_info.installed_desc; + *ddb_handle = obj_desc; + return_ACPI_STATUS (AE_OK); + + +cleanup: + acpi_ut_remove_reference (obj_desc); + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_load_table_op + * + * PARAMETERS: walk_state - Current state with operands + * return_desc - Where to store the return object + * + * RETURN: Status + * + * DESCRIPTION: Load an ACPI table + * + ******************************************************************************/ + +acpi_status +acpi_ex_load_table_op ( + struct acpi_walk_state *walk_state, + union acpi_operand_object **return_desc) +{ + acpi_status status; + union acpi_operand_object **operand = &walk_state->operands[0]; + struct acpi_table_header *table; + struct acpi_namespace_node *parent_node; + struct acpi_namespace_node *start_node; + struct acpi_namespace_node *parameter_node = NULL; + union acpi_operand_object *ddb_handle; + + + ACPI_FUNCTION_TRACE ("ex_load_table_op"); + + +#if 0 + /* + * Make sure that the signature does not match one of the tables that + * is already loaded. + */ + status = acpi_tb_match_signature (operand[0]->string.pointer, NULL); + if (status == AE_OK) { + /* Signature matched -- don't allow override */ + + return_ACPI_STATUS (AE_ALREADY_EXISTS); + } +#endif + + /* Find the ACPI table */ + + status = acpi_tb_find_table (operand[0]->string.pointer, + operand[1]->string.pointer, + operand[2]->string.pointer, &table); + if (ACPI_FAILURE (status)) { + if (status != AE_NOT_FOUND) { + return_ACPI_STATUS (status); + } + + /* Table not found, return an Integer=0 and AE_OK */ + + ddb_handle = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER); + if (!ddb_handle) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + ddb_handle->integer.value = 0; + *return_desc = ddb_handle; + + return_ACPI_STATUS (AE_OK); + } + + /* Default nodes */ + + start_node = walk_state->scope_info->scope.node; + parent_node = acpi_gbl_root_node; + + /* root_path (optional parameter) */ + + if (operand[3]->string.length > 0) { + /* + * Find the node referenced by the root_path_string. This is the + * location within the namespace where the table will be loaded. + */ + status = acpi_ns_get_node_by_path (operand[3]->string.pointer, start_node, + ACPI_NS_SEARCH_PARENT, &parent_node); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* parameter_path (optional parameter) */ + + if (operand[4]->string.length > 0) { + if ((operand[4]->string.pointer[0] != '\\') && + (operand[4]->string.pointer[0] != '^')) { + /* + * Path is not absolute, so it will be relative to the node + * referenced by the root_path_string (or the NS root if omitted) + */ + start_node = parent_node; + } + + /* + * Find the node referenced by the parameter_path_string + */ + status = acpi_ns_get_node_by_path (operand[4]->string.pointer, start_node, + ACPI_NS_SEARCH_PARENT, ¶meter_node); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* Load the table into the namespace */ + + status = acpi_ex_add_table (table, parent_node, &ddb_handle); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + /* Parameter Data (optional) */ + + if (parameter_node) { + /* Store the parameter data into the optional parameter object */ + + status = acpi_ex_store (operand[5], ACPI_CAST_PTR (union acpi_operand_object, parameter_node), + walk_state); + if (ACPI_FAILURE (status)) { + (void) acpi_ex_unload_table (ddb_handle); + return_ACPI_STATUS (status); + } + } + + *return_desc = ddb_handle; + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_load_op + * + * PARAMETERS: obj_desc - Region or Field where the table will be + * obtained + * Target - Where a handle to the table will be stored + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Load an ACPI table from a field or operation region + * + ******************************************************************************/ + +acpi_status +acpi_ex_load_op ( + union acpi_operand_object *obj_desc, + union acpi_operand_object *target, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + union acpi_operand_object *ddb_handle; + union acpi_operand_object *buffer_desc = NULL; + struct acpi_table_header *table_ptr = NULL; + acpi_physical_address address; + struct acpi_table_header table_header; + u32 i; + + ACPI_FUNCTION_TRACE ("ex_load_op"); + + + /* Object can be either an op_region or a Field */ + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_REGION: + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Region %p %s\n", + obj_desc, acpi_ut_get_object_type_name (obj_desc))); + + /* + * If the Region Address and Length have not been previously evaluated, + * evaluate them now and save the results. + */ + if (!(obj_desc->common.flags & AOPOBJ_DATA_VALID)) { + status = acpi_ds_get_region_arguments (obj_desc); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* Get the base physical address of the region */ + + address = obj_desc->region.address; + + /* Get the table length from the table header */ + + table_header.length = 0; + for (i = 0; i < 8; i++) { + status = acpi_ev_address_space_dispatch (obj_desc, ACPI_READ, + (acpi_physical_address) (i + address), 8, + ((u8 *) &table_header) + i); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + } + + /* Sanity check the table length */ + + if (table_header.length < sizeof (struct acpi_table_header)) { + return_ACPI_STATUS (AE_BAD_HEADER); + } + + /* Allocate a buffer for the entire table */ + + table_ptr = ACPI_MEM_ALLOCATE (table_header.length); + if (!table_ptr) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Get the entire table from the op region */ + + for (i = 0; i < table_header.length; i++) { + status = acpi_ev_address_space_dispatch (obj_desc, ACPI_READ, + (acpi_physical_address) (i + address), 8, + ((u8 *) table_ptr + i)); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + } + break; + + + case ACPI_TYPE_LOCAL_REGION_FIELD: + case ACPI_TYPE_LOCAL_BANK_FIELD: + case ACPI_TYPE_LOCAL_INDEX_FIELD: + + ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Load from Field %p %s\n", + obj_desc, acpi_ut_get_object_type_name (obj_desc))); + + /* + * The length of the field must be at least as large as the table. + * Read the entire field and thus the entire table. Buffer is + * allocated during the read. + */ + status = acpi_ex_read_data_from_field (walk_state, obj_desc, &buffer_desc); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + table_ptr = ACPI_CAST_PTR (struct acpi_table_header, buffer_desc->buffer.pointer); + + /* Sanity check the table length */ + + if (table_ptr->length < sizeof (struct acpi_table_header)) { + return_ACPI_STATUS (AE_BAD_HEADER); + } + break; + + + default: + return_ACPI_STATUS (AE_AML_OPERAND_TYPE); + } + + /* The table must be either an SSDT or a PSDT */ + + if ((!ACPI_STRNCMP (table_ptr->signature, + acpi_gbl_table_data[ACPI_TABLE_PSDT].signature, + acpi_gbl_table_data[ACPI_TABLE_PSDT].sig_length)) && + (!ACPI_STRNCMP (table_ptr->signature, + acpi_gbl_table_data[ACPI_TABLE_SSDT].signature, + acpi_gbl_table_data[ACPI_TABLE_SSDT].sig_length))) { + ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, + "Table has invalid signature [%4.4s], must be SSDT or PSDT\n", + table_ptr->signature)); + status = AE_BAD_SIGNATURE; + goto cleanup; + } + + /* Install the new table into the local data structures */ + + status = acpi_ex_add_table (table_ptr, acpi_gbl_root_node, &ddb_handle); + if (ACPI_FAILURE (status)) { + goto cleanup; + } + + /* Store the ddb_handle into the Target operand */ + + status = acpi_ex_store (ddb_handle, target, walk_state); + if (ACPI_FAILURE (status)) { + (void) acpi_ex_unload_table (ddb_handle); + } + + return_ACPI_STATUS (status); + + +cleanup: + + if (buffer_desc) { + acpi_ut_remove_reference (buffer_desc); + } + else { + ACPI_MEM_FREE (table_ptr); + } + return_ACPI_STATUS (status); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_unload_table + * + * PARAMETERS: ddb_handle - Handle to a previously loaded table + * + * RETURN: Status + * + * DESCRIPTION: Unload an ACPI table + * + ******************************************************************************/ + +acpi_status +acpi_ex_unload_table ( + union acpi_operand_object *ddb_handle) +{ + acpi_status status = AE_OK; + union acpi_operand_object *table_desc = ddb_handle; + struct acpi_table_desc *table_info; + + + ACPI_FUNCTION_TRACE ("ex_unload_table"); + + + /* + * Validate the handle + * Although the handle is partially validated in acpi_ex_reconfiguration(), + * when it calls acpi_ex_resolve_operands(), the handle is more completely + * validated here. + */ + if ((!ddb_handle) || + (ACPI_GET_DESCRIPTOR_TYPE (ddb_handle) != ACPI_DESC_TYPE_OPERAND) || + (ACPI_GET_OBJECT_TYPE (ddb_handle) != ACPI_TYPE_LOCAL_REFERENCE)) { + return_ACPI_STATUS (AE_BAD_PARAMETER); + } + + /* Get the actual table descriptor from the ddb_handle */ + + table_info = (struct acpi_table_desc *) table_desc->reference.object; + + /* + * Delete the entire namespace under this table Node + * (Offset contains the table_id) + */ + acpi_ns_delete_namespace_by_owner (table_info->table_id); + + /* Delete the table itself */ + + (void) acpi_tb_uninstall_table (table_info->installed_desc); + + /* Delete the table descriptor (ddb_handle) */ + + acpi_ut_remove_reference (table_desc); + return_ACPI_STATUS (status); +} + diff --git a/drivers/acpi/executer/exconvrt.c b/drivers/acpi/executer/exconvrt.c new file mode 100644 index 00000000000..df7ba1219bf --- /dev/null +++ b/drivers/acpi/executer/exconvrt.c @@ -0,0 +1,708 @@ +/****************************************************************************** + * + * Module Name: exconvrt - Object conversion routines + * + *****************************************************************************/ + +/* + * 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/acinterp.h> +#include <acpi/amlcode.h> + + +#define _COMPONENT ACPI_EXECUTER + ACPI_MODULE_NAME ("exconvrt") + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_convert_to_integer + * + * PARAMETERS: obj_desc - Object to be converted. Must be an + * Integer, Buffer, or String + * result_desc - Where the new Integer object is returned + * Flags - Used for string conversion + * + * RETURN: Status + * + * DESCRIPTION: Convert an ACPI Object to an integer. + * + ******************************************************************************/ + +acpi_status +acpi_ex_convert_to_integer ( + union acpi_operand_object *obj_desc, + union acpi_operand_object **result_desc, + u32 flags) +{ + union acpi_operand_object *return_desc; + u8 *pointer; + acpi_integer result; + u32 i; + u32 count; + acpi_status status; + + + ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_integer", obj_desc); + + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_INTEGER: + + /* No conversion necessary */ + + *result_desc = obj_desc; + return_ACPI_STATUS (AE_OK); + + case ACPI_TYPE_BUFFER: + case ACPI_TYPE_STRING: + + /* Note: Takes advantage of common buffer/string fields */ + + pointer = obj_desc->buffer.pointer; + count = obj_desc->buffer.length; + break; + + default: + return_ACPI_STATUS (AE_TYPE); + } + + /* + * Convert the buffer/string to an integer. Note that both buffers and + * strings are treated as raw data - we don't convert ascii to hex for + * strings. + * + * There are two terminating conditions for the loop: + * 1) The size of an integer has been reached, or + * 2) The end of the buffer or string has been reached + */ + result = 0; + + /* + * String conversion is different than Buffer conversion + */ + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_STRING: + + /* + * Convert string to an integer - for most cases, the string must be + * hexadecimal as per the ACPI specification. The only exception (as + * of ACPI 3.0) is that the to_integer() operator allows both decimal + * and hexadecimal strings (hex prefixed with "0x"). + */ + status = acpi_ut_strtoul64 ((char *) pointer, flags, &result); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + break; + + + case ACPI_TYPE_BUFFER: + + /* Check for zero-length buffer */ + + if (!count) { + return_ACPI_STATUS (AE_AML_BUFFER_LIMIT); + } + + /* Transfer no more than an integer's worth of data */ + + if (count > acpi_gbl_integer_byte_width) { + count = acpi_gbl_integer_byte_width; + } + + /* + * Convert buffer to an integer - we simply grab enough raw data + * from the buffer to fill an integer + */ + for (i = 0; i < count; i++) { + /* + * Get next byte and shift it into the Result. + * Little endian is used, meaning that the first byte of the buffer + * is the LSB of the integer + */ + result |= (((acpi_integer) pointer[i]) << (i * 8)); + } + break; + + + default: + /* No other types can get here */ + break; + } + + /* + * Create a new integer + */ + return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER); + if (!return_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Save the Result */ + + return_desc->integer.value = result; + acpi_ex_truncate_for32bit_table (return_desc); + *result_desc = return_desc; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_convert_to_buffer + * + * PARAMETERS: obj_desc - Object to be converted. Must be an + * Integer, Buffer, or String + * result_desc - Where the new buffer object is returned + * + * RETURN: Status + * + * DESCRIPTION: Convert an ACPI Object to a Buffer + * + ******************************************************************************/ + +acpi_status +acpi_ex_convert_to_buffer ( + union acpi_operand_object *obj_desc, + union acpi_operand_object **result_desc) +{ + union acpi_operand_object *return_desc; + u8 *new_buf; + + + ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_buffer", obj_desc); + + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_BUFFER: + + /* No conversion necessary */ + + *result_desc = obj_desc; + return_ACPI_STATUS (AE_OK); + + + case ACPI_TYPE_INTEGER: + + /* + * Create a new Buffer object. + * Need enough space for one integer + */ + return_desc = acpi_ut_create_buffer_object (acpi_gbl_integer_byte_width); + if (!return_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Copy the integer to the buffer, LSB first */ + + new_buf = return_desc->buffer.pointer; + ACPI_MEMCPY (new_buf, + &obj_desc->integer.value, + acpi_gbl_integer_byte_width); + break; + + + case ACPI_TYPE_STRING: + + /* + * Create a new Buffer object + * Size will be the string length + * + * NOTE: Add one to the string length to include the null terminator. + * The ACPI spec is unclear on this subject, but there is existing + * ASL/AML code that depends on the null being transferred to the new + * buffer. + */ + return_desc = acpi_ut_create_buffer_object ((acpi_size) obj_desc->string.length + 1); + if (!return_desc) { + return_ACPI_STATUS (AE_NO_MEMORY); + } + + /* Copy the string to the buffer */ + + new_buf = return_desc->buffer.pointer; + ACPI_STRNCPY ((char *) new_buf, (char *) obj_desc->string.pointer, + obj_desc->string.length); + break; + + + default: + return_ACPI_STATUS (AE_TYPE); + } + + /* Mark buffer initialized */ + + return_desc->common.flags |= AOPOBJ_DATA_VALID; + *result_desc = return_desc; + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_convert_to_ascii + * + * PARAMETERS: Integer - Value to be converted + * Base - ACPI_STRING_DECIMAL or ACPI_STRING_HEX + * String - Where the string is returned + * data_width - Size of data item to be converted, in bytes + * + * RETURN: Actual string length + * + * DESCRIPTION: Convert an ACPI Integer to a hex or decimal string + * + ******************************************************************************/ + +u32 +acpi_ex_convert_to_ascii ( + acpi_integer integer, + u16 base, + u8 *string, + u8 data_width) +{ + acpi_integer digit; + acpi_native_uint i; + acpi_native_uint j; + acpi_native_uint k = 0; + acpi_native_uint hex_length; + acpi_native_uint decimal_length; + u32 remainder; + u8 supress_zeros; + + + ACPI_FUNCTION_ENTRY (); + + + switch (base) { + case 10: + + /* Setup max length for the decimal number */ + + switch (data_width) { + case 1: + decimal_length = ACPI_MAX8_DECIMAL_DIGITS; + break; + + case 4: + decimal_length = ACPI_MAX32_DECIMAL_DIGITS; + break; + + case 8: + default: + decimal_length = ACPI_MAX64_DECIMAL_DIGITS; + break; + } + + supress_zeros = TRUE; /* No leading zeros */ + remainder = 0; + + for (i = decimal_length; i > 0; i--) { + /* Divide by nth factor of 10 */ + + digit = integer; + for (j = 0; j < i; j++) { + (void) acpi_ut_short_divide (digit, 10, &digit, &remainder); + } + + /* Handle leading zeros */ + + if (remainder != 0) { + supress_zeros = FALSE; + } + + if (!supress_zeros) { + string[k] = (u8) (ACPI_ASCII_ZERO + remainder); + k++; + } + } + break; + + case 16: + + hex_length = ACPI_MUL_2 (data_width); /* 2 ascii hex chars per data byte */ + + for (i = 0, j = (hex_length-1); i < hex_length; i++, j--) { + /* Get one hex digit, most significant digits first */ + + string[k] = (u8) acpi_ut_hex_to_ascii_char (integer, ACPI_MUL_4 (j)); + k++; + } + break; + + default: + return (0); + } + + /* + * Since leading zeros are supressed, we must check for the case where + * the integer equals 0 + * + * Finally, null terminate the string and return the length + */ + if (!k) { + string [0] = ACPI_ASCII_ZERO; + k = 1; + } + + string [k] = 0; + return ((u32) k); +} + + +/******************************************************************************* + * + * FUNCTION: acpi_ex_convert_to_string + * + * PARAMETERS: obj_desc - Object to be converted. Must be an + * Integer, Buffer, or String + * result_desc - Where the string object is returned + * Type - String flags (base and conversion type) + * + * RETURN: Status + * + * DESCRIPTION: Convert an ACPI Object to a string + * + ******************************************************************************/ + +acpi_status +acpi_ex_convert_to_string ( + union acpi_operand_object *obj_desc, + union acpi_operand_object **result_desc, + u32 type) +{ + union acpi_operand_object *return_desc; + u8 *new_buf; + u32 i; + u32 string_length = 0; + u16 base = 16; + u8 separator = ','; + + + ACPI_FUNCTION_TRACE_PTR ("ex_convert_to_string", obj_desc); + + + switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { + case ACPI_TYPE_STRING: + + /* No conversion necessary */ |