1 files changed, 428 insertions, 0 deletions

diff --git a/drivers/acpi/utilities/utresrc.c b/drivers/acpi/utilities/utresrc.c
new file mode 100644
index 000000000000..07a314c710d8
--- /dev/null
+++ b/drivers/acpi/utilities/utresrc.c
@@ -0,0 +1,428 @@
+/*******************************************************************************
+ *
+ * Module Name: utresrc - Resource managment utilities
+ *
+ ******************************************************************************/
+
+/*
+ * 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/amlresrc.h>
+
+#define _COMPONENT          ACPI_UTILITIES
+ACPI_MODULE_NAME("utmisc")
+
+/*
+ * Base sizes of the raw AML resource descriptors, indexed by resource type.
+ * Zero indicates a reserved (and therefore invalid) resource type.
+ */
+const u8 acpi_gbl_resource_aml_sizes[] = {
+        /* Small descriptors */
+
+        0,
+        0,
+        0,
+        0,
+        ACPI_AML_SIZE_SMALL(struct aml_resource_irq),
+        ACPI_AML_SIZE_SMALL(struct aml_resource_dma),
+        ACPI_AML_SIZE_SMALL(struct aml_resource_start_dependent),
+        ACPI_AML_SIZE_SMALL(struct aml_resource_end_dependent),
+        ACPI_AML_SIZE_SMALL(struct aml_resource_io),
+        ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_io),
+        0,
+        0,
+        0,
+        0,
+        ACPI_AML_SIZE_SMALL(struct aml_resource_vendor_small),
+        ACPI_AML_SIZE_SMALL(struct aml_resource_end_tag),
+
+        /* Large descriptors */
+
+        0,
+        ACPI_AML_SIZE_LARGE(struct aml_resource_memory24),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_generic_register),
+        0,
+        ACPI_AML_SIZE_LARGE(struct aml_resource_vendor_large),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_memory32),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_fixed_memory32),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_address32),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_address16),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_extended_irq),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_address64),
+        ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64)
+};
+
+/*
+ * Resource types, used to validate the resource length field.
+ * The length of fixed-length types must match exactly, variable
+ * lengths must meet the minimum required length, etc.
+ * Zero indicates a reserved (and therefore invalid) resource type.
+ */
+static const u8 acpi_gbl_resource_types[] = {
+        /* Small descriptors */
+
+        0,
+        0,
+        0,
+        0,
+        ACPI_SMALL_VARIABLE_LENGTH,
+        ACPI_FIXED_LENGTH,
+        ACPI_SMALL_VARIABLE_LENGTH,
+        ACPI_FIXED_LENGTH,
+        ACPI_FIXED_LENGTH,
+        ACPI_FIXED_LENGTH,
+        0,
+        0,
+        0,
+        0,
+        ACPI_VARIABLE_LENGTH,
+        ACPI_FIXED_LENGTH,
+
+        /* Large descriptors */
+
+        0,
+        ACPI_FIXED_LENGTH,
+        ACPI_FIXED_LENGTH,
+        0,
+        ACPI_VARIABLE_LENGTH,
+        ACPI_FIXED_LENGTH,
+        ACPI_FIXED_LENGTH,
+        ACPI_VARIABLE_LENGTH,
+        ACPI_VARIABLE_LENGTH,
+        ACPI_VARIABLE_LENGTH,
+        ACPI_VARIABLE_LENGTH,
+        ACPI_FIXED_LENGTH
+};
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_validate_resource
+ *
+ * PARAMETERS:  Aml             - Pointer to the raw AML resource descriptor
+ *              return_index    - Where the resource index is returned. NULL
+ *                                if the index is not required.
+ *
+ * RETURN:      Status, and optionally the Index into the global resource tables
+ *
+ * DESCRIPTION: Validate an AML resource descriptor by checking the Resource
+ *              Type and Resource Length. Returns an index into the global
+ *              resource information/dispatch tables for later use.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ut_validate_resource(void *aml, u8 * return_index)
+{
+        u8 resource_type;
+        u8 resource_index;
+        acpi_rs_length resource_length;
+        acpi_rs_length minimum_resource_length;
+
+        ACPI_FUNCTION_ENTRY();
+
+        /*
+         * 1) Validate the resource_type field (Byte 0)
+         */
+        resource_type = *((u8 *) aml);
+
+        /*
+         * Byte 0 contains the descriptor name (Resource Type)
+         * Examine the large/small bit in the resource header
+         */
+        if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
+                /* Verify the large resource type (name) against the max */
+
+                if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
+                        return (AE_AML_INVALID_RESOURCE_TYPE);
+                }
+
+                /*
+                 * Large Resource Type -- bits 6:0 contain the name
+                 * Translate range 0x80-0x8B to index range 0x10-0x1B
+                 */
+                resource_index = (u8) (resource_type - 0x70);
+        } else {
+                /*
+                 * Small Resource Type -- bits 6:3 contain the name
+                 * Shift range to index range 0x00-0x0F
+                 */
+                resource_index = (u8)
+                    ((resource_type & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
+        }
+
+        /* Check validity of the resource type, zero indicates name is invalid */
+
+        if (!acpi_gbl_resource_types[resource_index]) {
+                return (AE_AML_INVALID_RESOURCE_TYPE);
+        }
+
+        /*
+         * 2) Validate the resource_length field. This ensures that the length
+         *    is at least reasonable, and guarantees that it is non-zero.
+         */
+        resource_length = acpi_ut_get_resource_length(aml);
+        minimum_resource_length = acpi_gbl_resource_aml_sizes[resource_index];
+
+        /* Validate based upon the type of resource - fixed length or variable */
+
+        switch (acpi_gbl_resource_types[resource_index]) {
+        case ACPI_FIXED_LENGTH:
+
+                /* Fixed length resource, length must match exactly */
+
+                if (resource_length != minimum_resource_length) {
+                        return (AE_AML_BAD_RESOURCE_LENGTH);
+                }
+                break;
+
+        case ACPI_VARIABLE_LENGTH:
+
+                /* Variable length resource, length must be at least the minimum */
+
+                if (resource_length < minimum_resource_length) {
+                        return (AE_AML_BAD_RESOURCE_LENGTH);
+                }
+                break;
+
+        case ACPI_SMALL_VARIABLE_LENGTH:
+
+                /* Small variable length resource, length can be (Min) or (Min-1) */
+
+                if ((resource_length > minimum_resource_length) ||
+                    (resource_length < (minimum_resource_length - 1))) {
+                        return (AE_AML_BAD_RESOURCE_LENGTH);
+                }
+                break;
+
+        default:
+
+                /* Shouldn't happen (because of validation earlier), but be sure */
+
+                return (AE_AML_INVALID_RESOURCE_TYPE);
+        }
+
+        /* Optionally return the resource table index */
+
+        if (return_index) {
+                *return_index = resource_index;
+        }
+
+        return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_type
+ *
+ * PARAMETERS:  Aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      The Resource Type with no extraneous bits (except the
+ *              Large/Small descriptor bit -- this is left alone)
+ *
+ * DESCRIPTION: Extract the Resource Type/Name from the first byte of
+ *              a resource descriptor.
+ *
+ ******************************************************************************/
+
+u8 acpi_ut_get_resource_type(void *aml)
+{
+        ACPI_FUNCTION_ENTRY();
+
+        /*
+         * Byte 0 contains the descriptor name (Resource Type)
+         * Examine the large/small bit in the resource header
+         */
+        if (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
+                /* Large Resource Type -- bits 6:0 contain the name */
+
+                return (*((u8 *) aml));
+        } else {
+                /* Small Resource Type -- bits 6:3 contain the name */
+
+                return ((u8) (*((u8 *) aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
+        }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_length
+ *
+ * PARAMETERS:  Aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Byte Length
+ *
+ * DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
+ *              definition, this does not include the size of the descriptor
+ *              header or the length field itself.
+ *
+ ******************************************************************************/
+
+u16 acpi_ut_get_resource_length(void *aml)
+{
+        acpi_rs_length resource_length;
+
+        ACPI_FUNCTION_ENTRY();
+
+        /*
+         * Byte 0 contains the descriptor name (Resource Type)
+         * Examine the large/small bit in the resource header
+         */
+        if (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
+                /* Large Resource type -- bytes 1-2 contain the 16-bit length */
+
+                ACPI_MOVE_16_TO_16(&resource_length, &((u8 *) aml)[1]);
+
+        } else {
+                /* Small Resource type -- bits 2:0 of byte 0 contain the length */
+
+                resource_length = (u16) (*((u8 *) aml) &
+                                         ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
+        }
+
+        return (resource_length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_header_length
+ *
+ * PARAMETERS:  Aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Length of the AML header (depends on large/small descriptor)
+ *
+ * DESCRIPTION: Get the length of the header for this resource.
+ *
+ ******************************************************************************/
+
+u8 acpi_ut_get_resource_header_length(void *aml)
+{
+        ACPI_FUNCTION_ENTRY();
+
+        /* Examine the large/small bit in the resource header */
+
+        if (*((u8 *) aml) & ACPI_RESOURCE_NAME_LARGE) {
+                return (sizeof(struct aml_resource_large_header));
+        } else {
+                return (sizeof(struct aml_resource_small_header));
+        }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_descriptor_length
+ *
+ * PARAMETERS:  Aml             - Pointer to the raw AML resource descriptor
+ *
+ * RETURN:      Byte length
+ *
+ * DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
+ *              length of the descriptor header and the length field itself.
+ *              Used to walk descriptor lists.
+ *
+ ******************************************************************************/
+
+u32 acpi_ut_get_descriptor_length(void *aml)
+{
+        ACPI_FUNCTION_ENTRY();
+
+        /*
+         * Get the Resource Length (does not include header length) and add
+         * the header length (depends on if this is a small or large resource)
+         */
+        return (acpi_ut_get_resource_length(aml) +
+                acpi_ut_get_resource_header_length(aml));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_resource_end_tag
+ *
+ * PARAMETERS:  obj_desc        - The resource template buffer object
+ *
+ * RETURN:      Pointer to the end tag
+ *
+ * DESCRIPTION: Find the end_tag resource descriptor in an AML resource template
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_get_resource_end_tag(union acpi_operand_object * obj_desc,
+                             u8 ** end_tag)
+{
+        acpi_status status;
+        u8 *aml;
+        u8 *end_aml;
+
+        ACPI_FUNCTION_TRACE("ut_get_resource_end_tag");
+
+        /* Get start and end pointers */
+
+        aml = obj_desc->buffer.pointer;
+        end_aml = aml + obj_desc->buffer.length;
+
+        /* Walk the resource template, one descriptor per iteration */
+
+        while (aml < end_aml) {
+                /* Validate the Resource Type and Resource Length */
+
+                status = acpi_ut_validate_resource(aml, NULL);
+                if (ACPI_FAILURE(status)) {
+                        return_ACPI_STATUS(status);
+                }
+
+                /* end_tag resource indicates the end of the resource template */
+
+                if (acpi_ut_get_resource_type(aml) ==
+                    ACPI_RESOURCE_NAME_END_TAG) {
+                        /* Return the pointer to the end_tag */
+
+                        *end_tag = aml;
+                        return_ACPI_STATUS(AE_OK);
+                }
+
+                /*
+                 * Point to the next resource descriptor in the AML buffer. The
+                 * descriptor length is guaranteed to be non-zero by resource
+                 * validation above.
+                 */
+                aml += acpi_ut_get_descriptor_length(aml);
+        }
+
+        /* Did not find an end_tag resource descriptor */
+
+        return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
+}