diff options
Diffstat (limited to 'drivers/acpi/parser/psargs.c')
| -rw-r--r-- | drivers/acpi/parser/psargs.c | 751 |
1 files changed, 0 insertions, 751 deletions
diff --git a/drivers/acpi/parser/psargs.c b/drivers/acpi/parser/psargs.c deleted file mode 100644 index d830b29b85b1..000000000000 --- a/drivers/acpi/parser/psargs.c +++ /dev/null @@ -1,751 +0,0 @@ -/****************************************************************************** - * - * Module Name: psargs - Parse AML opcode arguments - * - *****************************************************************************/ - -/* - * Copyright (C) 2000 - 2008, Intel Corp. - * 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/acparser.h> -#include <acpi/amlcode.h> -#include <acpi/acnamesp.h> -#include <acpi/acdispat.h> - -#define _COMPONENT ACPI_PARSER -ACPI_MODULE_NAME("psargs") - -/* Local prototypes */ -static u32 -acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state); - -static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state - *parser_state); - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_next_package_length - * - * PARAMETERS: parser_state - Current parser state object - * - * RETURN: Decoded package length. On completion, the AML pointer points - * past the length byte or bytes. - * - * DESCRIPTION: Decode and return a package length field. - * Note: Largest package length is 28 bits, from ACPI specification - * - ******************************************************************************/ - -static u32 -acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state) -{ - u8 *aml = parser_state->aml; - u32 package_length = 0; - u32 byte_count; - u8 byte_zero_mask = 0x3F; /* Default [0:5] */ - - ACPI_FUNCTION_TRACE(ps_get_next_package_length); - - /* - * Byte 0 bits [6:7] contain the number of additional bytes - * used to encode the package length, either 0,1,2, or 3 - */ - byte_count = (aml[0] >> 6); - parser_state->aml += ((acpi_size) byte_count + 1); - - /* Get bytes 3, 2, 1 as needed */ - - while (byte_count) { - /* - * Final bit positions for the package length bytes: - * Byte3->[20:27] - * Byte2->[12:19] - * Byte1->[04:11] - * Byte0->[00:03] - */ - package_length |= (aml[byte_count] << ((byte_count << 3) - 4)); - - byte_zero_mask = 0x0F; /* Use bits [0:3] of byte 0 */ - byte_count--; - } - - /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */ - - package_length |= (aml[0] & byte_zero_mask); - return_UINT32(package_length); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_next_package_end - * - * PARAMETERS: parser_state - Current parser state object - * - * RETURN: Pointer to end-of-package +1 - * - * DESCRIPTION: Get next package length and return a pointer past the end of - * the package. Consumes the package length field - * - ******************************************************************************/ - -u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state) -{ - u8 *start = parser_state->aml; - u32 package_length; - - ACPI_FUNCTION_TRACE(ps_get_next_package_end); - - /* Function below updates parser_state->Aml */ - - package_length = acpi_ps_get_next_package_length(parser_state); - - return_PTR(start + package_length); /* end of package */ -} - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_next_namestring - * - * PARAMETERS: parser_state - Current parser state object - * - * RETURN: Pointer to the start of the name string (pointer points into - * the AML. - * - * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name - * prefix characters. Set parser state to point past the string. - * (Name is consumed from the AML.) - * - ******************************************************************************/ - -char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state) -{ - u8 *start = parser_state->aml; - u8 *end = parser_state->aml; - - ACPI_FUNCTION_TRACE(ps_get_next_namestring); - - /* Point past any namestring prefix characters (backslash or carat) */ - - while (acpi_ps_is_prefix_char(*end)) { - end++; - } - - /* Decode the path prefix character */ - - switch (*end) { - case 0: - - /* null_name */ - - if (end == start) { - start = NULL; - } - end++; - break; - - case AML_DUAL_NAME_PREFIX: - - /* Two name segments */ - - end += 1 + (2 * ACPI_NAME_SIZE); - break; - - case AML_MULTI_NAME_PREFIX_OP: - - /* Multiple name segments, 4 chars each, count in next byte */ - - end += 2 + (*(end + 1) * ACPI_NAME_SIZE); - break; - - default: - - /* Single name segment */ - - end += ACPI_NAME_SIZE; - break; - } - - parser_state->aml = end; - return_PTR((char *)start); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_next_namepath - * - * PARAMETERS: parser_state - Current parser state object - * Arg - Where the namepath will be stored - * arg_count - If the namepath points to a control method - * the method's argument is returned here. - * possible_method_call - Whether the namepath can possibly be the - * start of a method call - * - * RETURN: Status - * - * DESCRIPTION: Get next name (if method call, return # of required args). - * Names are looked up in the internal namespace to determine - * if the name represents a control method. If a method - * is found, the number of arguments to the method is returned. - * This information is critical for parsing to continue correctly. - * - ******************************************************************************/ - -acpi_status -acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state, - struct acpi_parse_state *parser_state, - union acpi_parse_object *arg, u8 possible_method_call) -{ - acpi_status status; - char *path; - union acpi_parse_object *name_op; - union acpi_operand_object *method_desc; - struct acpi_namespace_node *node; - u8 *start = parser_state->aml; - - ACPI_FUNCTION_TRACE(ps_get_next_namepath); - - path = acpi_ps_get_next_namestring(parser_state); - acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); - - /* Null path case is allowed, just exit */ - - if (!path) { - arg->common.value.name = path; - return_ACPI_STATUS(AE_OK); - } - - /* - * Lookup the name in the internal namespace, starting with the current - * scope. We don't want to add anything new to the namespace here, - * however, so we use MODE_EXECUTE. - * Allow searching of the parent tree, but don't open a new scope - - * we just want to lookup the object (must be mode EXECUTE to perform - * the upsearch) - */ - status = acpi_ns_lookup(walk_state->scope_info, path, - ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, - ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, - NULL, &node); - - /* - * If this name is a control method invocation, we must - * setup the method call - */ - if (ACPI_SUCCESS(status) && - possible_method_call && (node->type == ACPI_TYPE_METHOD)) { - if (walk_state->opcode == AML_UNLOAD_OP) { - /* - * acpi_ps_get_next_namestring has increased the AML pointer, - * so we need to restore the saved AML pointer for method call. - */ - walk_state->parser_state.aml = start; - walk_state->arg_count = 1; - acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); - return_ACPI_STATUS(AE_OK); - } - - /* This name is actually a control method invocation */ - - method_desc = acpi_ns_get_attached_object(node); - ACPI_DEBUG_PRINT((ACPI_DB_PARSE, - "Control Method - %p Desc %p Path=%p\n", node, - method_desc, path)); - - name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP); - if (!name_op) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* Change Arg into a METHOD CALL and attach name to it */ - - acpi_ps_init_op(arg, AML_INT_METHODCALL_OP); - name_op->common.value.name = path; - - /* Point METHODCALL/NAME to the METHOD Node */ - - name_op->common.node = node; - acpi_ps_append_arg(arg, name_op); - - if (!method_desc) { - ACPI_ERROR((AE_INFO, - "Control Method %p has no attached object", - node)); - return_ACPI_STATUS(AE_AML_INTERNAL); - } - - ACPI_DEBUG_PRINT((ACPI_DB_PARSE, - "Control Method - %p Args %X\n", - node, method_desc->method.param_count)); - - /* Get the number of arguments to expect */ - - walk_state->arg_count = method_desc->method.param_count; - return_ACPI_STATUS(AE_OK); - } - - /* - * Special handling if the name was not found during the lookup - - * some not_found cases are allowed - */ - if (status == AE_NOT_FOUND) { - - /* 1) not_found is ok during load pass 1/2 (allow forward references) */ - - if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) != - ACPI_PARSE_EXECUTE) { - status = AE_OK; - } - - /* 2) not_found during a cond_ref_of(x) is ok by definition */ - - else if (walk_state->op->common.aml_opcode == - AML_COND_REF_OF_OP) { - status = AE_OK; - } - - /* - * 3) not_found while building a Package is ok at this point, we - * may flag as an error later if slack mode is not enabled. - * (Some ASL code depends on allowing this behavior) - */ - else if ((arg->common.parent) && - ((arg->common.parent->common.aml_opcode == - AML_PACKAGE_OP) - || (arg->common.parent->common.aml_opcode == - AML_VAR_PACKAGE_OP))) { - status = AE_OK; - } - } - - /* Final exception check (may have been changed from code above) */ - - if (ACPI_FAILURE(status)) { - ACPI_ERROR_NAMESPACE(path, status); - - if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == - ACPI_PARSE_EXECUTE) { - - /* Report a control method execution error */ - - status = acpi_ds_method_error(status, walk_state); - } - } - - /* Save the namepath */ - - arg->common.value.name = path; - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_next_simple_arg - * - * PARAMETERS: parser_state - Current parser state object - * arg_type - The argument type (AML_*_ARG) - * Arg - Where the argument is returned - * - * RETURN: None - * - * DESCRIPTION: Get the next simple argument (constant, string, or namestring) - * - ******************************************************************************/ - -void -acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state, - u32 arg_type, union acpi_parse_object *arg) -{ - u32 length; - u16 opcode; - u8 *aml = parser_state->aml; - - ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type); - - switch (arg_type) { - case ARGP_BYTEDATA: - - /* Get 1 byte from the AML stream */ - - opcode = AML_BYTE_OP; - arg->common.value.integer = (acpi_integer) * aml; - length = 1; - break; - - case ARGP_WORDDATA: - - /* Get 2 bytes from the AML stream */ - - opcode = AML_WORD_OP; - ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml); - length = 2; - break; - - case ARGP_DWORDDATA: - - /* Get 4 bytes from the AML stream */ - - opcode = AML_DWORD_OP; - ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml); - length = 4; - break; - - case ARGP_QWORDDATA: - - /* Get 8 bytes from the AML stream */ - - opcode = AML_QWORD_OP; - ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml); - length = 8; - break; - - case ARGP_CHARLIST: - - /* Get a pointer to the string, point past the string */ - - opcode = AML_STRING_OP; - arg->common.value.string = ACPI_CAST_PTR(char, aml); - - /* Find the null terminator */ - - length = 0; - while (aml[length]) { - length++; - } - length++; - break; - - case ARGP_NAME: - case ARGP_NAMESTRING: - - acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP); - arg->common.value.name = - acpi_ps_get_next_namestring(parser_state); - return_VOID; - - default: - - ACPI_ERROR((AE_INFO, "Invalid ArgType %X", arg_type)); - return_VOID; - } - - acpi_ps_init_op(arg, opcode); - parser_state->aml += length; - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_next_field - * - * PARAMETERS: parser_state - Current parser state object - * - * RETURN: A newly allocated FIELD op - * - * DESCRIPTION: Get next field (named_field, reserved_field, or access_field) - * - ******************************************************************************/ - -static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state - *parser_state) -{ - u32 aml_offset = (u32) - ACPI_PTR_DIFF(parser_state->aml, - parser_state->aml_start); - union acpi_parse_object *field; - u16 opcode; - u32 name; - - ACPI_FUNCTION_TRACE(ps_get_next_field); - - /* Determine field type */ - - switch (ACPI_GET8(parser_state->aml)) { - default: - - opcode = AML_INT_NAMEDFIELD_OP; - break; - - case 0x00: - - opcode = AML_INT_RESERVEDFIELD_OP; - parser_state->aml++; - break; - - case 0x01: - - opcode = AML_INT_ACCESSFIELD_OP; - parser_state->aml++; - break; - } - - /* Allocate a new field op */ - - field = acpi_ps_alloc_op(opcode); - if (!field) { - return_PTR(NULL); - } - - field->common.aml_offset = aml_offset; - - /* Decode the field type */ - - switch (opcode) { - case AML_INT_NAMEDFIELD_OP: - - /* Get the 4-character name */ - - ACPI_MOVE_32_TO_32(&name, parser_state->aml); - acpi_ps_set_name(field, name); - parser_state->aml += ACPI_NAME_SIZE; - - /* Get the length which is encoded as a package length */ - - field->common.value.size = - acpi_ps_get_next_package_length(parser_state); - break; - - case AML_INT_RESERVEDFIELD_OP: - - /* Get the length which is encoded as a package length */ - - field->common.value.size = - acpi_ps_get_next_package_length(parser_state); - break; - - case AML_INT_ACCESSFIELD_OP: - - /* - * Get access_type and access_attrib and merge into the field Op - * access_type is first operand, access_attribute is second - */ - field->common.value.integer = - (((u32) ACPI_GET8(parser_state->aml) << 8)); - parser_state->aml++; - field->common.value.integer |= ACPI_GET8(parser_state->aml); - parser_state->aml++; - break; - - default: - - /* Opcode was set in previous switch */ - break; - } - - return_PTR(field); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ps_get_next_arg - * - * PARAMETERS: walk_state - Current state - * parser_state - Current parser state object - * arg_type - The argument type (AML_*_ARG) - * return_arg - Where the next arg is returned - * - * RETURN: Status, and an op object containing the next argument. - * - * DESCRIPTION: Get next argument (including complex list arguments that require - * pushing the parser stack) - * - ******************************************************************************/ - -acpi_status -acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, - struct acpi_parse_state *parser_state, - u32 arg_type, union acpi_parse_object **return_arg) -{ - union acpi_parse_object *arg = NULL; - union acpi_parse_object *prev = NULL; - union acpi_parse_object *field; - u32 subop; - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state); - - switch (arg_type) { - case ARGP_BYTEDATA: - case ARGP_WORDDATA: - case ARGP_DWORDDATA: - case ARGP_CHARLIST: - case ARGP_NAME: - case ARGP_NAMESTRING: - - /* Constants, strings, and namestrings are all the same size */ - - arg = acpi_ps_alloc_op(AML_BYTE_OP); - if (!arg) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - acpi_ps_get_next_simple_arg(parser_state, arg_type, arg); - break; - - case ARGP_PKGLENGTH: - - /* Package length, nothing returned */ - - parser_state->pkg_end = - acpi_ps_get_next_package_end(parser_state); - break; - - case ARGP_FIELDLIST: - - if (parser_state->aml < parser_state->pkg_end) { - - /* Non-empty list */ - - while (parser_state->aml < parser_state->pkg_end) { - field = acpi_ps_get_next_field(parser_state); - if (!field) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - if (prev) { - prev->common.next = field; - } else { - arg = field; - } - prev = field; - } - - /* Skip to End of byte data */ - - parser_state->aml = parser_state->pkg_end; - } - break; - - case ARGP_BYTELIST: - - if (parser_state->aml < parser_state->pkg_end) { - - /* Non-empty list */ - - arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP); - if (!arg) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* Fill in bytelist data */ - - arg->common.value.size = (u32) - ACPI_PTR_DIFF(parser_state->pkg_end, - parser_state->aml); - arg->named.data = parser_state->aml; - - /* Skip to End of byte data */ - - parser_state->aml = parser_state->pkg_end; - } - break; - - case ARGP_TARGET: - case ARGP_SUPERNAME: - case ARGP_SIMPLENAME: - - subop = acpi_ps_peek_opcode(parser_state); - if (subop == 0 || - acpi_ps_is_leading_char(subop) || - acpi_ps_is_prefix_char(subop)) { - - /* null_name or name_string */ - - arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP); - if (!arg) { - return_ACPI_STATUS(AE_NO_MEMORY); - } - - /* To support super_name arg of Unload */ - - if (walk_state->opcode == AML_UNLOAD_OP) { - status = - acpi_ps_get_next_namepath(walk_state, - parser_state, arg, - 1); - - /* - * If the super_name arg of Unload is a method call, - * we have restored the AML pointer, just free this Arg - */ - if (arg->common.aml_opcode == - AML_INT_METHODCALL_OP) { - acpi_ps_free_op(arg); - arg = NULL; - } - } else { - status = - acpi_ps_get_next_namepath(walk_state, - parser_state, arg, - 0); - } - } else { - /* Single complex argument, nothing returned */ - - walk_state->arg_count = 1; - } - break; - - case ARGP_DATAOBJ: - case ARGP_TERMARG: - - /* Single complex argument, nothing returned */ - - walk_state->arg_count = 1; - break; - - case ARGP_DATAOBJLIST: - case ARGP_TERMLIST: - case ARGP_OBJLIST: - - if (parser_state->aml < parser_state->pkg_end) { - - /* Non-empty list of variable arguments, nothing returned */ - - walk_state->arg_count = ACPI_VAR_ARGS; - } - break; - - default: - - ACPI_ERROR((AE_INFO, "Invalid ArgType: %X", arg_type)); - status = AE_AML_OPERAND_TYPE; - break; - } - - *return_arg = arg; - return_ACPI_STATUS(status); -} |