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);
+}