1 files changed, 553 insertions, 0 deletions

diff --git a/drivers/acpi/tables/tbinstal.c b/drivers/acpi/tables/tbinstal.c
new file mode 100644
index 000000000000..85d5bb01022c
--- /dev/null
+++ b/drivers/acpi/tables/tbinstal.c
@@ -0,0 +1,553 @@
+/******************************************************************************
+ *
+ * Module Name: tbinstal - ACPI table installation and removal
+ *
+ *****************************************************************************/
+
+/*
+ * 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/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+         ACPI_MODULE_NAME    ("tbinstal")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_match_signature
+ *
+ * PARAMETERS:  Signature           - Table signature to match
+ *              table_info          - Return data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Compare signature against the list of "ACPI-subsystem-owned"
+ *              tables (DSDT/FADT/SSDT, etc.) Returns the table_type_iD on match.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_match_signature (
+        char                            *signature,
+        struct acpi_table_desc          *table_info,
+        u8                              search_type)
+{
+        acpi_native_uint                i;
+
+
+        ACPI_FUNCTION_TRACE ("tb_match_signature");
+
+
+        /*
+         * Search for a signature match among the known table types
+         */
+        for (i = 0; i < NUM_ACPI_TABLE_TYPES; i++) {
+                if (!(acpi_gbl_table_data[i].flags & search_type)) {
+                        continue;
+                }
+
+                if (!ACPI_STRNCMP (signature, acpi_gbl_table_data[i].signature,
+                                   acpi_gbl_table_data[i].sig_length)) {
+                        /* Found a signature match, return index if requested */
+
+                        if (table_info) {
+                                table_info->type = (u8) i;
+                        }
+
+                        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                                "Table [%4.4s] is an ACPI table consumed by the core subsystem\n",
+                                (char *) acpi_gbl_table_data[i].signature));
+
+                        return_ACPI_STATUS (AE_OK);
+                }
+        }
+
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+                "Table [%4.4s] is not an ACPI table consumed by the core subsystem - ignored\n",
+                (char *) signature));
+
+        return_ACPI_STATUS (AE_TABLE_NOT_SUPPORTED);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_install_table
+ *
+ * PARAMETERS:  table_info          - Return value from acpi_tb_get_table_body
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Load and validate all tables other than the RSDT.  The RSDT must
+ *              already be loaded and validated.
+ *              Install the table into the global data structs.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_install_table (
+        struct acpi_table_desc          *table_info)
+{
+        acpi_status                     status;
+
+        ACPI_FUNCTION_TRACE ("tb_install_table");
+
+
+        /* Lock tables while installing */
+
+        status = acpi_ut_acquire_mutex (ACPI_MTX_TABLES);
+        if (ACPI_FAILURE (status)) {
+                ACPI_REPORT_ERROR (("Could not acquire table mutex for [%4.4s], %s\n",
+                        table_info->pointer->signature, acpi_format_exception (status)));
+                return_ACPI_STATUS (status);
+        }
+
+        /* Install the table into the global data structure */
+
+        status = acpi_tb_init_table_descriptor (table_info->type, table_info);
+        if (ACPI_FAILURE (status)) {
+                ACPI_REPORT_ERROR (("Could not install ACPI table [%4.4s], %s\n",
+                        table_info->pointer->signature, acpi_format_exception (status)));
+        }
+
+        ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s located at %p\n",
+                acpi_gbl_table_data[table_info->type].name, table_info->pointer));
+
+        (void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_recognize_table
+ *
+ * PARAMETERS:  table_info          - Return value from acpi_tb_get_table_body
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Check a table signature for a match against known table types
+ *
+ * NOTE:  All table pointers are validated as follows:
+ *          1) Table pointer must point to valid physical memory
+ *          2) Signature must be 4 ASCII chars, even if we don't recognize the
+ *             name
+ *          3) Table must be readable for length specified in the header
+ *          4) Table checksum must be valid (with the exception of the FACS
+ *             which has no checksum for some odd reason)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_recognize_table (
+        struct acpi_table_desc          *table_info,
+        u8                              search_type)
+{
+        struct acpi_table_header        *table_header;
+        acpi_status                     status;
+
+
+        ACPI_FUNCTION_TRACE ("tb_recognize_table");
+
+
+        /* Ensure that we have a valid table pointer */
+
+        table_header = (struct acpi_table_header *) table_info->pointer;
+        if (!table_header) {
+                return_ACPI_STATUS (AE_BAD_PARAMETER);
+        }
+
+        /*
+         * We only "recognize" a limited number of ACPI tables -- namely, the
+         * ones that are used by the subsystem (DSDT, FADT, etc.)
+         *
+         * An AE_TABLE_NOT_SUPPORTED means that the table was not recognized.
+         * This can be any one of many valid ACPI tables, it just isn't one of
+         * the tables that is consumed by the core subsystem
+         */
+        status = acpi_tb_match_signature (table_header->signature, table_info, search_type);
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        status = acpi_tb_validate_table_header (table_header);
+        if (ACPI_FAILURE (status)) {
+                return_ACPI_STATUS (status);
+        }
+
+        /* Return the table type and length via the info struct */
+
+        table_info->length = (acpi_size) table_header->length;
+
+        return_ACPI_STATUS (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_init_table_descriptor
+ *
+ * PARAMETERS:  table_type          - The type of the table
+ *              table_info          - A table info struct
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Install a table into the global data structs.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_init_table_descriptor (
+        acpi_table_type                 table_type,
+        struct acpi_table_desc          *table_info)
+{
+        struct acpi_table_list          *list_head;
+        struct acpi_table_desc          *table_desc;
+
+
+        ACPI_FUNCTION_TRACE_U32 ("tb_init_table_descriptor", table_type);
+
+
+        /* Allocate a descriptor for this table */
+
+        table_desc = ACPI_MEM_CALLOCATE (sizeof (struct acpi_table_desc));
+        if (!table_desc) {
+                return_ACPI_STATUS (AE_NO_MEMORY);
+        }
+
+        /*
+         * Install the table into the global data structure
+         */
+        list_head = &acpi_gbl_table_lists[table_type];
+
+        /*
+         * Two major types of tables:  1) Only one instance is allowed.  This
+         * includes most ACPI tables such as the DSDT.  2) Multiple instances of
+         * the table are allowed.  This includes SSDT and PSDTs.
+         */
+        if (ACPI_IS_SINGLE_TABLE (acpi_gbl_table_data[table_type].flags)) {
+                /*
+                 * Only one table allowed, and a table has alread been installed
+                 * at this location, so return an error.
+                 */
+                if (list_head->next) {
+                        ACPI_MEM_FREE (table_desc);
+                        return_ACPI_STATUS (AE_ALREADY_EXISTS);
+                }
+
+                table_desc->next = list_head->next;
+                list_head->next = table_desc;
+
+                if (table_desc->next) {
+                        table_desc->next->prev = table_desc;
+                }
+
+                list_head->count++;
+        }
+        else {
+                /*
+                 * Link the new table in to the list of tables of this type.
+                 * Insert at the end of the list, order IS IMPORTANT.
+                 *
+                 * table_desc->Prev & Next are already NULL from calloc()
+                 */
+                list_head->count++;
+
+                if (!list_head->next) {
+                        list_head->next = table_desc;
+                }
+                else {
+                        table_desc->next = list_head->next;
+
+                        while (table_desc->next->next) {
+                                table_desc->next = table_desc->next->next;
+                        }
+
+                        table_desc->next->next = table_desc;
+                        table_desc->prev = table_desc->next;
+                        table_desc->next = NULL;
+                }
+        }
+
+        /* Finish initialization of the table descriptor */
+
+        table_desc->type                = (u8) table_type;
+        table_desc->pointer             = table_info->pointer;
+        table_desc->length              = table_info->length;
+        table_desc->allocation          = table_info->allocation;
+        table_desc->aml_start           = (u8 *) (table_desc->pointer + 1),
+        table_desc->aml_length          = (u32) (table_desc->length -
+                         (u32) sizeof (struct acpi_table_header));
+        table_desc->table_id            = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_TABLE);
+        table_desc->loaded_into_namespace = FALSE;
+
+        /*
+         * Set the appropriate global pointer (if there is one) to point to the
+         * newly installed table
+         */
+        if (acpi_gbl_table_data[table_type].global_ptr) {
+                *(acpi_gbl_table_data[table_type].global_ptr) = table_info->pointer;
+        }
+
+        /* Return Data */
+
+        table_info->table_id        = table_desc->table_id;
+        table_info->installed_desc  = table_desc;
+
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_delete_all_tables
+ *
+ * PARAMETERS:  None.
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Delete all internal ACPI tables
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_delete_all_tables (void)
+{
+        acpi_table_type                 type;
+
+
+        /*
+         * Free memory allocated for ACPI tables
+         * Memory can either be mapped or allocated
+         */
+        for (type = 0; type < NUM_ACPI_TABLE_TYPES; type++) {
+                acpi_tb_delete_tables_by_type (type);
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_delete_tables_by_type
+ *
+ * PARAMETERS:  Type                - The table type to be deleted
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Delete an internal ACPI table
+ *              Locks the ACPI table mutex
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_delete_tables_by_type (
+        acpi_table_type                 type)
+{
+        struct acpi_table_desc          *table_desc;
+        u32                             count;
+        u32                             i;
+
+
+        ACPI_FUNCTION_TRACE_U32 ("tb_delete_tables_by_type", type);
+
+
+        if (type > ACPI_TABLE_MAX) {
+                return_VOID;
+        }
+
+        if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_TABLES))) {
+                return;
+        }
+
+        /* Clear the appropriate "typed" global table pointer */
+
+        switch (type) {
+        case ACPI_TABLE_RSDP:
+                acpi_gbl_RSDP = NULL;
+                break;
+
+        case ACPI_TABLE_DSDT:
+                acpi_gbl_DSDT = NULL;
+                break;
+
+        case ACPI_TABLE_FADT:
+                acpi_gbl_FADT = NULL;
+                break;
+
+        case ACPI_TABLE_FACS:
+                acpi_gbl_FACS = NULL;
+                break;
+
+        case ACPI_TABLE_XSDT:
+                acpi_gbl_XSDT = NULL;
+                break;
+
+        case ACPI_TABLE_SSDT:
+        case ACPI_TABLE_PSDT:
+        default:
+                break;
+        }
+
+        /*
+         * Free the table
+         * 1) Get the head of the list
+         */
+        table_desc = acpi_gbl_table_lists[type].next;
+        count     = acpi_gbl_table_lists[type].count;
+
+        /*
+         * 2) Walk the entire list, deleting both the allocated tables
+         *    and the table descriptors
+         */
+        for (i = 0; i < count; i++) {
+                table_desc = acpi_tb_uninstall_table (table_desc);
+        }
+
+        (void) acpi_ut_release_mutex (ACPI_MTX_TABLES);
+        return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_delete_single_table
+ *
+ * PARAMETERS:  table_info          - A table info struct
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Low-level free for a single ACPI table.  Handles cases where
+ *              the table was allocated a buffer or was mapped.
+ *
+ ******************************************************************************/
+
+void
+acpi_tb_delete_single_table (
+        struct acpi_table_desc          *table_desc)
+{
+
+        /* Must have a valid table descriptor and pointer */
+
+        if ((!table_desc) ||
+                 (!table_desc->pointer)) {
+                return;
+        }
+
+        /* Valid table, determine type of memory allocation */
+
+        switch (table_desc->allocation) {
+        case ACPI_MEM_NOT_ALLOCATED:
+                break;
+
+        case ACPI_MEM_ALLOCATED:
+
+                ACPI_MEM_FREE (table_desc->pointer);
+                break;
+
+        case ACPI_MEM_MAPPED:
+
+                acpi_os_unmap_memory (table_desc->pointer, table_desc->length);
+                break;
+
+        default:
+                break;
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_uninstall_table
+ *
+ * PARAMETERS:  table_info          - A table info struct
+ *
+ * RETURN:      Pointer to the next table in the list (of same type)
+ *
+ * DESCRIPTION: Free the memory associated with an internal ACPI table that
+ *              is either installed or has never been installed.
+ *              Table mutex should be locked.
+ *
+ ******************************************************************************/
+
+struct acpi_table_desc *
+acpi_tb_uninstall_table (
+        struct acpi_table_desc          *table_desc)
+{
+        struct acpi_table_desc          *next_desc;
+
+
+        ACPI_FUNCTION_TRACE_PTR ("tb_uninstall_table", table_desc);
+
+
+        if (!table_desc) {
+                return_PTR (NULL);
+        }
+
+        /* Unlink the descriptor from the doubly linked list */
+
+        if (table_desc->prev) {
+                table_desc->prev->next = table_desc->next;
+        }
+        else {
+                /* Is first on list, update list head */
+
+                acpi_gbl_table_lists[table_desc->type].next = table_desc->next;
+        }
+
+        if (table_desc->next) {
+                table_desc->next->prev = table_desc->prev;
+        }
+
+        /* Free the memory allocated for the table itself */
+
+        acpi_tb_delete_single_table (table_desc);
+
+        /* Free the table descriptor */
+
+        next_desc = table_desc->next;
+        ACPI_MEM_FREE (table_desc);
+
+        /* Return pointer to the next descriptor */
+
+        return_PTR (next_desc);
+}
+
+