mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
4441e55d50
This affects all ACPICA source code modules. ACPICA commit c570953c914437e621dd5f160f26ddf352e0d2f4 Link: https://github.com/acpica/acpica/commit/c570953c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
909 lines
22 KiB
C
909 lines
22 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: psargs - Parse AML opcode arguments
|
|
*
|
|
* Copyright (C) 2000 - 2021, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acparser.h"
|
|
#include "amlcode.h"
|
|
#include "acnamesp.h"
|
|
#include "acdispat.h"
|
|
#include "acconvert.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_IS_ROOT_PREFIX(*end) || ACPI_IS_PARENT_PREFIX(*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_NAMESEG_SIZE);
|
|
break;
|
|
|
|
case AML_MULTI_NAME_PREFIX:
|
|
|
|
/* Multiple name segments, 4 chars each, count in next byte */
|
|
|
|
end += 2 + (*(end + 1) * ACPI_NAMESEG_SIZE);
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Single name segment */
|
|
|
|
end += ACPI_NAMESEG_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 ((GET_CURRENT_ARG_TYPE(walk_state->arg_types) ==
|
|
ARGP_SUPERNAME)
|
|
|| (GET_CURRENT_ARG_TYPE(walk_state->arg_types) ==
|
|
ARGP_TARGET)) {
|
|
/*
|
|
* acpi_ps_get_next_namestring has increased the AML pointer past
|
|
* the method invocation namestring, so we need to restore the
|
|
* saved AML pointer back to the original method invocation
|
|
* namestring.
|
|
*/
|
|
walk_state->parser_state.aml = start;
|
|
walk_state->arg_count = 1;
|
|
acpi_ps_init_op(arg, AML_INT_METHODCALL_OP);
|
|
}
|
|
|
|
/* This name is actually a control method invocation */
|
|
|
|
method_desc = acpi_ns_get_attached_object(node);
|
|
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
|
|
"Control Method invocation %4.4s - %p Desc %p Path=%p\n",
|
|
node->name.ascii, node, method_desc, path));
|
|
|
|
name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, start);
|
|
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_CONDITIONAL_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_VARIABLE_PACKAGE_OP))) {
|
|
status = AE_OK;
|
|
}
|
|
}
|
|
|
|
/* Final exception check (may have been changed from code above) */
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_ERROR_NAMESPACE(walk_state->scope_info, 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 = (u64) *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 0x%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)
|
|
{
|
|
u8 *aml;
|
|
union acpi_parse_object *field;
|
|
union acpi_parse_object *arg = NULL;
|
|
u16 opcode;
|
|
u32 name;
|
|
u8 access_type;
|
|
u8 access_attribute;
|
|
u8 access_length;
|
|
u32 pkg_length;
|
|
u8 *pkg_end;
|
|
u32 buffer_length;
|
|
|
|
ACPI_FUNCTION_TRACE(ps_get_next_field);
|
|
|
|
ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state);
|
|
aml = parser_state->aml;
|
|
|
|
/* Determine field type */
|
|
|
|
switch (ACPI_GET8(parser_state->aml)) {
|
|
case AML_FIELD_OFFSET_OP:
|
|
|
|
opcode = AML_INT_RESERVEDFIELD_OP;
|
|
parser_state->aml++;
|
|
break;
|
|
|
|
case AML_FIELD_ACCESS_OP:
|
|
|
|
opcode = AML_INT_ACCESSFIELD_OP;
|
|
parser_state->aml++;
|
|
break;
|
|
|
|
case AML_FIELD_CONNECTION_OP:
|
|
|
|
opcode = AML_INT_CONNECTION_OP;
|
|
parser_state->aml++;
|
|
break;
|
|
|
|
case AML_FIELD_EXT_ACCESS_OP:
|
|
|
|
opcode = AML_INT_EXTACCESSFIELD_OP;
|
|
parser_state->aml++;
|
|
break;
|
|
|
|
default:
|
|
|
|
opcode = AML_INT_NAMEDFIELD_OP;
|
|
break;
|
|
}
|
|
|
|
/* Allocate a new field op */
|
|
|
|
field = acpi_ps_alloc_op(opcode, aml);
|
|
if (!field) {
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/* Decode the field type */
|
|
|
|
ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state);
|
|
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_NAMESEG_SIZE;
|
|
|
|
ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state);
|
|
|
|
#ifdef ACPI_ASL_COMPILER
|
|
/*
|
|
* Because the package length isn't represented as a parse tree object,
|
|
* take comments surrounding this and add to the previously created
|
|
* parse node.
|
|
*/
|
|
if (field->common.inline_comment) {
|
|
field->common.name_comment =
|
|
field->common.inline_comment;
|
|
}
|
|
field->common.inline_comment = acpi_gbl_current_inline_comment;
|
|
acpi_gbl_current_inline_comment = NULL;
|
|
#endif
|
|
|
|
/* 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:
|
|
case AML_INT_EXTACCESSFIELD_OP:
|
|
|
|
/*
|
|
* Get access_type and access_attrib and merge into the field Op
|
|
* access_type is first operand, access_attribute is second. stuff
|
|
* these bytes into the node integer value for convenience.
|
|
*/
|
|
|
|
/* Get the two bytes (Type/Attribute) */
|
|
|
|
access_type = ACPI_GET8(parser_state->aml);
|
|
parser_state->aml++;
|
|
access_attribute = ACPI_GET8(parser_state->aml);
|
|
parser_state->aml++;
|
|
|
|
field->common.value.integer = (u8)access_type;
|
|
field->common.value.integer |= (u16)(access_attribute << 8);
|
|
|
|
/* This opcode has a third byte, access_length */
|
|
|
|
if (opcode == AML_INT_EXTACCESSFIELD_OP) {
|
|
access_length = ACPI_GET8(parser_state->aml);
|
|
parser_state->aml++;
|
|
|
|
field->common.value.integer |=
|
|
(u32)(access_length << 16);
|
|
}
|
|
break;
|
|
|
|
case AML_INT_CONNECTION_OP:
|
|
|
|
/*
|
|
* Argument for Connection operator can be either a Buffer
|
|
* (resource descriptor), or a name_string.
|
|
*/
|
|
aml = parser_state->aml;
|
|
if (ACPI_GET8(parser_state->aml) == AML_BUFFER_OP) {
|
|
parser_state->aml++;
|
|
|
|
ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state);
|
|
pkg_end = parser_state->aml;
|
|
pkg_length =
|
|
acpi_ps_get_next_package_length(parser_state);
|
|
pkg_end += pkg_length;
|
|
|
|
ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state);
|
|
if (parser_state->aml < pkg_end) {
|
|
|
|
/* Non-empty list */
|
|
|
|
arg =
|
|
acpi_ps_alloc_op(AML_INT_BYTELIST_OP, aml);
|
|
if (!arg) {
|
|
acpi_ps_free_op(field);
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/* Get the actual buffer length argument */
|
|
|
|
opcode = ACPI_GET8(parser_state->aml);
|
|
parser_state->aml++;
|
|
|
|
ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state);
|
|
switch (opcode) {
|
|
case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
|
|
|
|
buffer_length =
|
|
ACPI_GET8(parser_state->aml);
|
|
parser_state->aml += 1;
|
|
break;
|
|
|
|
case AML_WORD_OP: /* AML_WORDDATA_ARG */
|
|
|
|
buffer_length =
|
|
ACPI_GET16(parser_state->aml);
|
|
parser_state->aml += 2;
|
|
break;
|
|
|
|
case AML_DWORD_OP: /* AML_DWORDATA_ARG */
|
|
|
|
buffer_length =
|
|
ACPI_GET32(parser_state->aml);
|
|
parser_state->aml += 4;
|
|
break;
|
|
|
|
default:
|
|
|
|
buffer_length = 0;
|
|
break;
|
|
}
|
|
|
|
/* Fill in bytelist data */
|
|
|
|
ASL_CV_CAPTURE_COMMENTS_ONLY(parser_state);
|
|
arg->named.value.size = buffer_length;
|
|
arg->named.data = parser_state->aml;
|
|
}
|
|
|
|
/* Skip to End of byte data */
|
|
|
|
parser_state->aml = pkg_end;
|
|
} else {
|
|
arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP, aml);
|
|
if (!arg) {
|
|
acpi_ps_free_op(field);
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/* Get the Namestring argument */
|
|
|
|
arg->common.value.name =
|
|
acpi_ps_get_next_namestring(parser_state);
|
|
}
|
|
|
|
/* Link the buffer/namestring to parent (CONNECTION_OP) */
|
|
|
|
acpi_ps_append_arg(field, arg);
|
|
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);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
|
|
"Expected argument type ARGP: %s (%2.2X)\n",
|
|
acpi_ut_get_argument_type_name(arg_type), arg_type));
|
|
|
|
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, parser_state->aml);
|
|
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,
|
|
parser_state->aml);
|
|
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_SIMPLENAME:
|
|
case ARGP_NAME_OR_REF:
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
|
|
"**** SimpleName/NameOrRef: %s (%2.2X)\n",
|
|
acpi_ut_get_argument_type_name(arg_type),
|
|
arg_type));
|
|
|
|
subop = acpi_ps_peek_opcode(parser_state);
|
|
if (subop == 0 ||
|
|
acpi_ps_is_leading_char(subop) ||
|
|
ACPI_IS_ROOT_PREFIX(subop) ||
|
|
ACPI_IS_PARENT_PREFIX(subop)) {
|
|
|
|
/* null_name or name_string */
|
|
|
|
arg =
|
|
acpi_ps_alloc_op(AML_INT_NAMEPATH_OP,
|
|
parser_state->aml);
|
|
if (!arg) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
status =
|
|
acpi_ps_get_next_namepath(walk_state, parser_state,
|
|
arg,
|
|
ACPI_NOT_METHOD_CALL);
|
|
} else {
|
|
/* Single complex argument, nothing returned */
|
|
|
|
walk_state->arg_count = 1;
|
|
}
|
|
break;
|
|
|
|
case ARGP_TARGET:
|
|
case ARGP_SUPERNAME:
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
|
|
"**** Target/Supername: %s (%2.2X)\n",
|
|
acpi_ut_get_argument_type_name(arg_type),
|
|
arg_type));
|
|
|
|
subop = acpi_ps_peek_opcode(parser_state);
|
|
if (subop == 0 ||
|
|
acpi_ps_is_leading_char(subop) ||
|
|
ACPI_IS_ROOT_PREFIX(subop) ||
|
|
ACPI_IS_PARENT_PREFIX(subop)) {
|
|
|
|
/* NULL target (zero). Convert to a NULL namepath */
|
|
|
|
arg =
|
|
acpi_ps_alloc_op(AML_INT_NAMEPATH_OP,
|
|
parser_state->aml);
|
|
if (!arg) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
status =
|
|
acpi_ps_get_next_namepath(walk_state, parser_state,
|
|
arg,
|
|
ACPI_POSSIBLE_METHOD_CALL);
|
|
|
|
if (arg->common.aml_opcode == AML_INT_METHODCALL_OP) {
|
|
|
|
/* Free method call op and corresponding namestring sub-ob */
|
|
|
|
acpi_ps_free_op(arg->common.value.arg);
|
|
acpi_ps_free_op(arg);
|
|
arg = NULL;
|
|
walk_state->arg_count = 1;
|
|
}
|
|
} else {
|
|
/* Single complex argument, nothing returned */
|
|
|
|
walk_state->arg_count = 1;
|
|
}
|
|
break;
|
|
|
|
case ARGP_DATAOBJ:
|
|
case ARGP_TERMARG:
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
|
|
"**** TermArg/DataObj: %s (%2.2X)\n",
|
|
acpi_ut_get_argument_type_name(arg_type),
|
|
arg_type));
|
|
|
|
/* 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: 0x%X", arg_type));
|
|
status = AE_AML_OPERAND_TYPE;
|
|
break;
|
|
}
|
|
|
|
*return_arg = arg;
|
|
return_ACPI_STATUS(status);
|
|
}
|