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!

1 files changed, 746 insertions, 0 deletions

diff --git a/drivers/acpi/parser/psargs.c b/drivers/acpi/parser/psargs.c
new file mode 100644
index 000000000000..b5d98895f6a8
--- /dev/null
+++ b/drivers/acpi/parser/psargs.c
@@ -0,0 +1,746 @@
+/******************************************************************************
+ *
+ * Module Name: psargs - Parse AML opcode arguments
+ *
+ *****************************************************************************/
+
+/*
+ * 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/acparser.h>
+#include <acpi/amlcode.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_PARSER
+	 ACPI_MODULE_NAME    ("psargs")
+
+
+/*******************************************************************************
+ *
+ * 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
+ *
+ ******************************************************************************/
+
+u32
+acpi_ps_get_next_package_length (
+	struct acpi_parse_state         *parser_state)
+{
+	u32                             encoded_length;
+	u32                             length = 0;
+
+
+	ACPI_FUNCTION_TRACE ("ps_get_next_package_length");
+
+
+	encoded_length = (u32) ACPI_GET8 (parser_state->aml);
+	parser_state->aml++;
+
+
+	switch (encoded_length >> 6) /* bits 6-7 contain encoding scheme */ {
+	case 0: /* 1-byte encoding (bits 0-5) */
+
+		length = (encoded_length & 0x3F);
+		break;
+
+
+	case 1: /* 2-byte encoding (next byte + bits 0-3) */
+
+		length = ((ACPI_GET8 (parser_state->aml) << 04) |
+				 (encoded_length & 0x0F));
+		parser_state->aml++;
+		break;
+
+
+	case 2: /* 3-byte encoding (next 2 bytes + bits 0-3) */
+
+		length = ((ACPI_GET8 (parser_state->aml + 1) << 12) |
+				  (ACPI_GET8 (parser_state->aml)    << 04) |
+				  (encoded_length & 0x0F));
+		parser_state->aml += 2;
+		break;
+
+
+	case 3: /* 4-byte encoding (next 3 bytes + bits 0-3) */
+
+		length = ((ACPI_GET8 (parser_state->aml + 2) << 20) |
+				  (ACPI_GET8 (parser_state->aml + 1) << 12) |
+				  (ACPI_GET8 (parser_state->aml)    << 04) |
+				  (encoded_length & 0x0F));
+		parser_state->aml += 3;
+		break;
+
+	default:
+
+		/* Can't get here, only 2 bits / 4 cases */
+		break;
+	}
+
+	return_VALUE (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;
+	acpi_native_uint                length;
+
+
+	ACPI_FUNCTION_TRACE ("ps_get_next_package_end");
+
+
+	/* Function below changes parser_state->Aml */
+
+	length = (acpi_native_uint) acpi_ps_get_next_package_length (parser_state);
+
+	return_PTR (start + 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");
+
+
+	/* Handle multiple prefix characters */
+
+	while (acpi_ps_is_prefix_char (ACPI_GET8 (end))) {
+		/* Include prefix '\\' or '^' */
+
+		end++;
+	}
+
+	/* Decode the path */
+
+	switch (ACPI_GET8 (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 */
+
+		end += 2 + ((acpi_size) ACPI_GET8 (end + 1) * ACPI_NAME_SIZE);
+		break;
+
+	default:
+
+		/* Single name segment */
+
+		end += ACPI_NAME_SIZE;
+		break;
+	}
+
+	parser_state->aml = (u8*) 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.
+ *              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                              method_call)
+{
+	char                            *path;
+	union acpi_parse_object         *name_op;
+	acpi_status                     status = AE_OK;
+	union acpi_operand_object       *method_desc;
+	struct acpi_namespace_node      *node;
+	union acpi_generic_state        scope_info;
+
+
+	ACPI_FUNCTION_TRACE ("ps_get_next_namepath");
+
+
+	path = acpi_ps_get_next_namestring (parser_state);
+
+	/* Null path case is allowed */
+
+	if (path) {
+		/*
+		 * Lookup the name in the internal namespace
+		 */
+		scope_info.scope.node = NULL;
+		node = parser_state->start_node;
+		if (node) {
+			scope_info.scope.node = node;
+		}
+
+		/*
+		 * Lookup object.  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 upsearch)
+		 */
+		status = acpi_ns_lookup (&scope_info, path, ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
+				 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &node);
+		if (ACPI_SUCCESS (status) && method_call) {
+			if (node->type == ACPI_TYPE_METHOD) {
+				/*
+				 * 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_REPORT_ERROR ((
+						"ps_get_next_namepath: Control Method %p has no attached object\n",
+						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);
+			}
+
+			/*
+			 * Else this is normal named object reference.
+			 * Just init the NAMEPATH object with the pathname.
+			 * (See code below)
+			 */
+		}
+
+		if (ACPI_FAILURE (status)) {
+			/*
+			 * 1) Any error other than NOT_FOUND is always severe
+			 * 2) NOT_FOUND is only important if we are executing a method.
+			 * 3) If executing a cond_ref_of opcode, NOT_FOUND is ok.
+			 */
+			if ((((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == ACPI_PARSE_EXECUTE) &&
+				(status == AE_NOT_FOUND)                                                &&
+				(walk_state->op->common.aml_opcode != AML_COND_REF_OF_OP)) ||
+
+				(status != AE_NOT_FOUND)) {
+				ACPI_REPORT_NSERROR (path, status);
+
+				acpi_os_printf ("search_node %p start_node %p return_node %p\n",
+					scope_info.scope.node, parser_state->start_node, node);
+
+
+			}
+			else {
+				/*
+				 * We got a NOT_FOUND during table load or we encountered
+				 * a cond_ref_of(x) where the target does not exist.
+				 * -- either case is ok
+				 */
+				status = AE_OK;
+			}
+		}
+	}
+
+	/*
+	 * Regardless of success/failure above,
+	 * Just initialize the Op with the pathname.
+	 */
+	acpi_ps_init_op (arg, AML_INT_NAMEPATH_OP);
+	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)
+{
+
+	ACPI_FUNCTION_TRACE_U32 ("ps_get_next_simple_arg", arg_type);
+
+
+	switch (arg_type) {
+	case ARGP_BYTEDATA:
+
+		acpi_ps_init_op (arg, AML_BYTE_OP);
+		arg->common.value.integer = (u32) ACPI_GET8 (parser_state->aml);
+		parser_state->aml++;
+		break;
+
+
+	case ARGP_WORDDATA:
+
+		acpi_ps_init_op (arg, AML_WORD_OP);
+
+		/* Get 2 bytes from the AML stream */
+
+		ACPI_MOVE_16_TO_32 (&arg->common.value.integer, parser_state->aml);
+		parser_state->aml += 2;
+		break;
+
+
+	case ARGP_DWORDDATA:
+
+		acpi_ps_init_op (arg, AML_DWORD_OP);
+
+		/* Get 4 bytes from the AML stream */
+
+		ACPI_MOVE_32_TO_32 (&arg->common.value.integer, parser_state->aml);
+		parser_state->aml += 4;
+		break;
+
+
+	case ARGP_QWORDDATA:
+
+		acpi_ps_init_op (arg, AML_QWORD_OP);
+
+		/* Get 8 bytes from the AML stream */
+
+		ACPI_MOVE_64_TO_64 (&arg->common.value.integer, parser_state->aml);
+		parser_state->aml += 8;
+		break;
+
+
+	case ARGP_CHARLIST:
+
+		acpi_ps_init_op (arg, AML_STRING_OP);
+		arg->common.value.string = (char *) parser_state->aml;
+
+		while (ACPI_GET8 (parser_state->aml) != '\0') {
+			parser_state->aml++;
+		}
+		parser_state->aml++;
+		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);
+		break;
+
+
+	default:
+
+		ACPI_REPORT_ERROR (("Invalid arg_type %X\n", arg_type));
+		break;
+	}
+
+	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)
+ *
+ ******************************************************************************/
+
+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 = (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:  parser_state        - Current parser state object
+ *              arg_type            - The argument type (AML_*_ARG)
+ *              arg_count           - If the argument points to a control method
+ *                                    the method's argument is returned here.
+ *
+ * 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);
+			}
+
+			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_REPORT_ERROR (("Invalid arg_type: %X\n", arg_type));
+		status = AE_AML_OPERAND_TYPE;
+		break;
+	}
+
+	*return_arg = arg;
+	return_ACPI_STATUS (status);
+}