1 files changed, 738 insertions, 0 deletions

diff --git a/drivers/acpi/executer/exmisc.c b/drivers/acpi/executer/exmisc.c
new file mode 100644
index 000000000000..b542dcd58c07
--- /dev/null
+++ b/drivers/acpi/executer/exmisc.c
@@ -0,0 +1,738 @@
+
+/******************************************************************************
+ *
+ * Module Name: exmisc - ACPI AML (p-code) execution - specific 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>
+
+
+#define _COMPONENT          ACPI_EXECUTER
+         ACPI_MODULE_NAME    ("exmisc")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_get_object_reference
+ *
+ * PARAMETERS:  obj_desc            - Create a reference to this object
+ *              return_desc         - Where to store the reference
+ *              walk_state          - Current state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Obtain and return a "reference" to the target object
+ *              Common code for the ref_of_op and the cond_ref_of_op.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_get_object_reference (
+        union acpi_operand_object       *obj_desc,
+        union acpi_operand_object       **return_desc,
+        struct acpi_walk_state          *walk_state)
+{
+        union acpi_operand_object       *reference_obj;
+        union acpi_operand_object       *referenced_obj;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("ex_get_object_reference", obj_desc);
+
+
+        *return_desc = NULL;
+
+        switch (ACPI_GET_DESCRIPTOR_TYPE (obj_desc)) {
+        case ACPI_DESC_TYPE_OPERAND:
+
+                if (ACPI_GET_OBJECT_TYPE (obj_desc) != ACPI_TYPE_LOCAL_REFERENCE) {
+                        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+                }
+
+                /*
+                 * Must be a reference to a Local or Arg
+                 */
+                switch (obj_desc->reference.opcode) {
+                case AML_LOCAL_OP:
+                case AML_ARG_OP:
+                case AML_DEBUG_OP:
+
+                        /* The referenced object is the pseudo-node for the local/arg */
+
+                        referenced_obj = obj_desc->reference.object;
+                        break;
+
+                default:
+
+                        ACPI_REPORT_ERROR (("Unknown Reference opcode in get_reference %X\n",
+                                obj_desc->reference.opcode));
+                        return_ACPI_STATUS (AE_AML_INTERNAL);
+                }
+                break;
+
+
+        case ACPI_DESC_TYPE_NAMED:
+
+                /*
+                 * A named reference that has already been resolved to a Node
+                 */
+                referenced_obj = obj_desc;
+                break;
+
+
+        default:
+
+                ACPI_REPORT_ERROR (("Invalid descriptor type in get_reference: %X\n",
+                                ACPI_GET_DESCRIPTOR_TYPE (obj_desc)));
+                return_ACPI_STATUS (AE_TYPE);
+        }
+
+
+        /* Create a new reference object */
+
+        reference_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_REFERENCE);
+        if (!reference_obj) {
+                return_ACPI_STATUS (AE_NO_MEMORY);
+        }
+
+        reference_obj->reference.opcode = AML_REF_OF_OP;
+        reference_obj->reference.object = referenced_obj;
+        *return_desc = reference_obj;
+
+        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Object %p Type [%s], returning Reference %p\n",
+                        obj_desc, acpi_ut_get_object_type_name (obj_desc), *return_desc));
+
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_concat_template
+ *
+ * PARAMETERS:  Operand0            - First source object
+ *              Operand1            - Second source object
+ *              actual_return_desc  - Where to place the return object
+ *              walk_state          - Current walk state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Concatenate two resource templates
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_concat_template (
+        union acpi_operand_object       *operand0,
+        union acpi_operand_object       *operand1,
+        union acpi_operand_object       **actual_return_desc,
+        struct acpi_walk_state          *walk_state)
+{
+        union acpi_operand_object       *return_desc;
+        u8                              *new_buf;
+        u8                              *end_tag1;
+        u8                              *end_tag2;
+        acpi_size                       length1;
+        acpi_size                       length2;
+
+
+        ACPI_FUNCTION_TRACE ("ex_concat_template");
+
+
+        /* Find the end_tags in each resource template */
+
+        end_tag1 = acpi_ut_get_resource_end_tag (operand0);
+        end_tag2 = acpi_ut_get_resource_end_tag (operand1);
+        if (!end_tag1 || !end_tag2) {
+                return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+        }
+
+        /* Compute the length of each part */
+
+        length1 = ACPI_PTR_DIFF (end_tag1, operand0->buffer.pointer);
+        length2 = ACPI_PTR_DIFF (end_tag2, operand1->buffer.pointer) +
+                          2; /* Size of END_TAG */
+
+        /* Create a new buffer object for the result */
+
+        return_desc = acpi_ut_create_buffer_object (length1 + length2);
+        if (!return_desc) {
+                return_ACPI_STATUS (AE_NO_MEMORY);
+        }
+
+        /* Copy the templates to the new descriptor */
+
+        new_buf = return_desc->buffer.pointer;
+        ACPI_MEMCPY (new_buf, operand0->buffer.pointer, length1);
+        ACPI_MEMCPY (new_buf + length1, operand1->buffer.pointer, length2);
+
+        /* Compute the new checksum */
+
+        new_buf[return_desc->buffer.length - 1] =
+                        acpi_ut_generate_checksum (return_desc->buffer.pointer,
+                                           (return_desc->buffer.length - 1));
+
+        /* Return the completed template descriptor */
+
+        *actual_return_desc = return_desc;
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_do_concatenate
+ *
+ * PARAMETERS:  Operand0            - First source object
+ *              Operand1            - Second source object
+ *              actual_return_desc  - Where to place the return object
+ *              walk_state          - Current walk state
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Concatenate two objects OF THE SAME TYPE.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_do_concatenate (
+        union acpi_operand_object       *operand0,
+        union acpi_operand_object       *operand1,
+        union acpi_operand_object       **actual_return_desc,
+        struct acpi_walk_state          *walk_state)
+{
+        union acpi_operand_object       *local_operand1 = operand1;
+        union acpi_operand_object       *return_desc;
+        char                            *new_buf;
+        acpi_status                     status;
+        acpi_size                       new_length;
+
+
+        ACPI_FUNCTION_TRACE ("ex_do_concatenate");
+
+
+        /*
+         * Convert the second operand if necessary.  The first operand
+         * determines the type of the second operand, (See the Data Types
+         * section of the ACPI specification.)  Both object types are
+         * guaranteed to be either Integer/String/Buffer by the operand
+         * resolution mechanism.
+         */
+        switch (ACPI_GET_OBJECT_TYPE (operand0)) {
+        case ACPI_TYPE_INTEGER:
+                status = acpi_ex_convert_to_integer (operand1, &local_operand1, 16);
+                break;
+
+        case ACPI_TYPE_STRING:
+                status = acpi_ex_convert_to_string (operand1, &local_operand1,
+                                 ACPI_IMPLICIT_CONVERT_HEX);
+                break;
+
+        case ACPI_TYPE_BUFFER:
+                status = acpi_ex_convert_to_buffer (operand1, &local_operand1);
+                break;
+
+        default:
+                ACPI_REPORT_ERROR (("Concat - invalid obj type: %X\n",
+                                ACPI_GET_OBJECT_TYPE (operand0)));
+                status = AE_AML_INTERNAL;
+        }
+
+        if (ACPI_FAILURE (status)) {
+                goto cleanup;
+        }
+
+        /*
+         * Both operands are now known to be the same object type
+         * (Both are Integer, String, or Buffer), and we can now perform the
+         * concatenation.
+         */
+
+        /*
+         * There are three cases to handle:
+         *
+         * 1) Two Integers concatenated to produce a new Buffer
+         * 2) Two Strings concatenated to produce a new String
+         * 3) Two Buffers concatenated to produce a new Buffer
+         */
+        switch (ACPI_GET_OBJECT_TYPE (operand0)) {
+        case ACPI_TYPE_INTEGER:
+
+                /* Result of two Integers is a Buffer */
+                /* Need enough buffer space for two integers */
+
+                return_desc = acpi_ut_create_buffer_object (
+                                   ACPI_MUL_2 (acpi_gbl_integer_byte_width));
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                new_buf = (char *) return_desc->buffer.pointer;
+
+                /* Copy the first integer, LSB first */
+
+                ACPI_MEMCPY (new_buf,
+                                  &operand0->integer.value,
+                                  acpi_gbl_integer_byte_width);
+
+                /* Copy the second integer (LSB first) after the first */
+
+                ACPI_MEMCPY (new_buf + acpi_gbl_integer_byte_width,
+                                  &local_operand1->integer.value,
+                                  acpi_gbl_integer_byte_width);
+                break;
+
+        case ACPI_TYPE_STRING:
+
+                /* Result of two Strings is a String */
+
+                new_length = (acpi_size) operand0->string.length +
+                                 (acpi_size) local_operand1->string.length;
+                if (new_length > ACPI_MAX_STRING_CONVERSION) {
+                        status = AE_AML_STRING_LIMIT;
+                        goto cleanup;
+                }
+
+                return_desc = acpi_ut_create_string_object (new_length);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                new_buf = return_desc->string.pointer;
+
+                /* Concatenate the strings */
+
+                ACPI_STRCPY (new_buf,
+                                  operand0->string.pointer);
+                ACPI_STRCPY (new_buf + operand0->string.length,
+                                  local_operand1->string.pointer);
+                break;
+
+        case ACPI_TYPE_BUFFER:
+
+                /* Result of two Buffers is a Buffer */
+
+                return_desc = acpi_ut_create_buffer_object (
+                                   (acpi_size) operand0->buffer.length +
+                                   (acpi_size) local_operand1->buffer.length);
+                if (!return_desc) {
+                        status = AE_NO_MEMORY;
+                        goto cleanup;
+                }
+
+                new_buf = (char *) return_desc->buffer.pointer;
+
+                /* Concatenate the buffers */
+
+                ACPI_MEMCPY (new_buf,
+                                  operand0->buffer.pointer,
+                                  operand0->buffer.length);
+                ACPI_MEMCPY (new_buf + operand0->buffer.length,
+                                  local_operand1->buffer.pointer,
+                                  local_operand1->buffer.length);
+                break;
+
+        default:
+
+                /* Invalid object type, should not happen here */
+
+                ACPI_REPORT_ERROR (("Concatenate - Invalid object type: %X\n",
+                                ACPI_GET_OBJECT_TYPE (operand0)));
+                status =AE_AML_INTERNAL;
+                goto cleanup;
+        }
+
+        *actual_return_desc = return_desc;
+
+cleanup:
+        if (local_operand1 != operand1) {
+                acpi_ut_remove_reference (local_operand1);
+        }
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_do_math_op
+ *
+ * PARAMETERS:  Opcode              - AML opcode
+ *              Integer0            - Integer operand #0
+ *              Integer1            - Integer operand #1
+ *
+ * RETURN:      Integer result of the operation
+ *
+ * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the
+ *              math functions here is to prevent a lot of pointer dereferencing
+ *              to obtain the operands.
+ *
+ ******************************************************************************/
+
+acpi_integer
+acpi_ex_do_math_op (
+        u16                             opcode,
+        acpi_integer                    integer0,
+        acpi_integer                    integer1)
+{
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        switch (opcode) {
+        case AML_ADD_OP:                /* Add (Integer0, Integer1, Result) */
+
+                return (integer0 + integer1);
+
+
+        case AML_BIT_AND_OP:            /* And (Integer0, Integer1, Result) */
+
+                return (integer0 & integer1);
+
+
+        case AML_BIT_NAND_OP:           /* NAnd (Integer0, Integer1, Result) */
+
+                return (~(integer0 & integer1));
+
+
+        case AML_BIT_OR_OP:             /* Or (Integer0, Integer1, Result) */
+
+                return (integer0 | integer1);
+
+
+        case AML_BIT_NOR_OP:            /* NOr (Integer0, Integer1, Result) */
+
+                return (~(integer0 | integer1));
+
+
+        case AML_BIT_XOR_OP:            /* XOr (Integer0, Integer1, Result) */
+
+                return (integer0 ^ integer1);
+
+
+        case AML_MULTIPLY_OP:           /* Multiply (Integer0, Integer1, Result) */
+
+                return (integer0 * integer1);
+
+
+        case AML_SHIFT_LEFT_OP:         /* shift_left (Operand, shift_count, Result) */
+
+                return (integer0 << integer1);
+
+
+        case AML_SHIFT_RIGHT_OP:        /* shift_right (Operand, shift_count, Result) */
+
+                return (integer0 >> integer1);
+
+
+        case AML_SUBTRACT_OP:           /* Subtract (Integer0, Integer1, Result) */
+
+                return (integer0 - integer1);
+
+        default:
+
+                return (0);
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_do_logical_numeric_op
+ *
+ * PARAMETERS:  Opcode              - AML opcode
+ *              Integer0            - Integer operand #0
+ *              Integer1            - Integer operand #1
+ *              logical_result      - TRUE/FALSE result of the operation
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric
+ *              operators (LAnd and LOr), both operands must be integers.
+ *
+ *              Note: cleanest machine code seems to be produced by the code
+ *              below, rather than using statements of the form:
+ *                  Result = (Integer0 && Integer1);
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_do_logical_numeric_op (
+        u16                             opcode,
+        acpi_integer                    integer0,
+        acpi_integer                    integer1,
+        u8                              *logical_result)
+{
+        acpi_status                     status = AE_OK;
+        u8                              local_result = FALSE;
+
+
+        ACPI_FUNCTION_TRACE ("ex_do_logical_numeric_op");
+
+
+        switch (opcode) {
+        case AML_LAND_OP:               /* LAnd (Integer0, Integer1) */
+
+                if (integer0 && integer1) {
+                        local_result = TRUE;
+                }
+                break;
+
+        case AML_LOR_OP:                /* LOr (Integer0, Integer1) */
+
+                if (integer0 || integer1) {
+                        local_result = TRUE;
+                }
+                break;
+
+        default:
+                status = AE_AML_INTERNAL;
+                break;
+        }
+
+        /* Return the logical result and status */
+
+        *logical_result = local_result;
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_do_logical_op
+ *
+ * PARAMETERS:  Opcode              - AML opcode
+ *              Operand0            - operand #0
+ *              Operand1            - operand #1
+ *              logical_result      - TRUE/FALSE result of the operation
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the
+ *              functions here is to prevent a lot of pointer dereferencing
+ *              to obtain the operands and to simplify the generation of the
+ *              logical value. For the Numeric operators (LAnd and LOr), both
+ *              operands must be integers. For the other logical operators,
+ *              operands can be any combination of Integer/String/Buffer. The
+ *              first operand determines the type to which the second operand
+ *              will be converted.
+ *
+ *              Note: cleanest machine code seems to be produced by the code
+ *              below, rather than using statements of the form:
+ *                  Result = (Operand0 == Operand1);
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_do_logical_op (
+        u16                             opcode,
+        union acpi_operand_object       *operand0,
+        union acpi_operand_object       *operand1,
+        u8                              *logical_result)
+{
+        union acpi_operand_object       *local_operand1 = operand1;
+        acpi_integer                    integer0;
+        acpi_integer                    integer1;
+        u32                             length0;
+        u32                             length1;
+        acpi_status                     status = AE_OK;
+        u8                              local_result = FALSE;
+        int                             compare;
+
+
+        ACPI_FUNCTION_TRACE ("ex_do_logical_op");
+
+
+        /*
+         * Convert the second operand if necessary.  The first operand
+         * determines the type of the second operand, (See the Data Types
+         * section of the ACPI 3.0+ specification.)  Both object types are
+         * guaranteed to be either Integer/String/Buffer by the operand
+         * resolution mechanism.
+         */
+        switch (ACPI_GET_OBJECT_TYPE (operand0)) {
+        case ACPI_TYPE_INTEGER:
+                status = acpi_ex_convert_to_integer (operand1, &local_operand1, 16);
+                break;
+
+        case ACPI_TYPE_STRING:
+                status = acpi_ex_convert_to_string (operand1, &local_operand1,
+                                 ACPI_IMPLICIT_CONVERT_HEX);
+                break;
+
+        case ACPI_TYPE_BUFFER:
+                status = acpi_ex_convert_to_buffer (operand1, &local_operand1);
+                break;
+
+        default:
+                status = AE_AML_INTERNAL;
+                break;
+        }
+
+        if (ACPI_FAILURE (status)) {
+                goto cleanup;
+        }
+
+        /*
+         * Two cases: 1) Both Integers, 2) Both Strings or Buffers
+         */
+        if (ACPI_GET_OBJECT_TYPE (operand0) == ACPI_TYPE_INTEGER) {
+                /*
+                 * 1) Both operands are of type integer
+                 *    Note: local_operand1 may have changed above
+                 */
+                integer0 = operand0->integer.value;
+                integer1 = local_operand1->integer.value;
+
+                switch (opcode) {
+                case AML_LEQUAL_OP:             /* LEqual (Operand0, Operand1) */
+
+                        if (integer0 == integer1) {
+                                local_result = TRUE;
+                        }
+                        break;
+
+                case AML_LGREATER_OP:           /* LGreater (Operand0, Operand1) */
+
+                        if (integer0 > integer1) {
+                                local_result = TRUE;
+                        }
+                        break;
+
+                case AML_LLESS_OP:              /* LLess (Operand0, Operand1) */
+
+                        if (integer0 < integer1) {
+                                local_result = TRUE;
+                        }
+                        break;
+
+                default:
+                        status = AE_AML_INTERNAL;
+                        break;
+                }
+        }
+        else {
+                /*
+                 * 2) Both operands are Strings or both are Buffers
+                 *    Note: Code below takes advantage of common Buffer/String
+                 *          object fields. local_operand1 may have changed above. Use
+                 *          memcmp to handle nulls in buffers.
+                 */
+                length0 = operand0->buffer.length;
+                length1 = local_operand1->buffer.length;
+
+                /* Lexicographic compare: compare the data bytes */
+
+                compare = ACPI_MEMCMP ((const char * ) operand0->buffer.pointer,
+                                 (const char * ) local_operand1->buffer.pointer,
+                                 (length0 > length1) ? length1 : length0);
+
+                switch (opcode) {
+                case AML_LEQUAL_OP:             /* LEqual (Operand0, Operand1) */
+
+                        /* Length and all bytes must be equal */
+
+                        if ((length0 == length1) &&
+                                (compare == 0)) {
+                                /* Length and all bytes match ==> TRUE */
+
+                                local_result = TRUE;
+                        }
+                        break;
+
+                case AML_LGREATER_OP:           /* LGreater (Operand0, Operand1) */
+
+                        if (compare > 0) {
+                                local_result = TRUE;
+                                goto cleanup;   /* TRUE */
+                        }
+                        if (compare < 0) {
+                                goto cleanup;   /* FALSE */
+                        }
+
+                        /* Bytes match (to shortest length), compare lengths */
+
+                        if (length0 > length1) {
+                                local_result = TRUE;
+                        }
+                        break;
+
+                case AML_LLESS_OP:              /* LLess (Operand0, Operand1) */
+
+                        if (compare > 0) {
+                                goto cleanup;   /* FALSE */
+                        }
+                        if (compare < 0) {
+                                local_result = TRUE;
+                                goto cleanup;   /* TRUE */
+                        }
+
+                        /* Bytes match (to shortest length), compare lengths */
+
+                        if (length0 < length1) {
+                                local_result = TRUE;
+                        }
+                        break;
+
+                default:
+                        status = AE_AML_INTERNAL;
+                        break;
+                }
+        }
+
+cleanup:
+
+        /* New object was created if implicit conversion performed - delete */
+
+        if (local_operand1 != operand1) {
+                acpi_ut_remove_reference (local_operand1);
+        }
+
+        /* Return the logical result and status */
+
+        *logical_result = local_result;
+        return_ACPI_STATUS (status);
+}
+
+