1 files changed, 564 insertions, 0 deletions

diff --git a/drivers/acpi/tables/tbconvrt.c b/drivers/acpi/tables/tbconvrt.c
new file mode 100644
index 000000000000..334327c1f66f
--- /dev/null
+++ b/drivers/acpi/tables/tbconvrt.c
@@ -0,0 +1,564 @@
+/******************************************************************************
+ *
+ * Module Name: tbconvrt - ACPI Table conversion 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 <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/actables.h>
+
+
+#define _COMPONENT          ACPI_TABLES
+         ACPI_MODULE_NAME    ("tbconvrt")
+
+
+u8 acpi_fadt_is_v1;
+EXPORT_SYMBOL(acpi_fadt_is_v1);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_get_table_count
+ *
+ * PARAMETERS:  RSDP            - Pointer to the RSDP
+ *              RSDT            - Pointer to the RSDT/XSDT
+ *
+ * RETURN:      The number of tables pointed to by the RSDT or XSDT.
+ *
+ * DESCRIPTION: Calculate the number of tables.  Automatically handles either
+ *              an RSDT or XSDT.
+ *
+ ******************************************************************************/
+
+u32
+acpi_tb_get_table_count (
+        struct rsdp_descriptor          *RSDP,
+        struct acpi_table_header        *RSDT)
+{
+        u32                             pointer_size;
+
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        if (RSDP->revision < 2) {
+                pointer_size = sizeof (u32);
+        }
+        else {
+                pointer_size = sizeof (u64);
+        }
+
+        /*
+         * Determine the number of tables pointed to by the RSDT/XSDT.
+         * This is defined by the ACPI Specification to be the number of
+         * pointers contained within the RSDT/XSDT.  The size of the pointers
+         * is architecture-dependent.
+         */
+        return ((RSDT->length - sizeof (struct acpi_table_header)) / pointer_size);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_to_xsdt
+ *
+ * PARAMETERS:  table_info      - Info about the RSDT
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert an RSDT to an XSDT (internal common format)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_convert_to_xsdt (
+        struct acpi_table_desc          *table_info)
+{
+        acpi_size                       table_size;
+        u32                             i;
+        XSDT_DESCRIPTOR         *new_table;
+
+
+        ACPI_FUNCTION_ENTRY ();
+
+
+        /* Compute size of the converted XSDT */
+
+        table_size = ((acpi_size) acpi_gbl_rsdt_table_count * sizeof (u64)) +
+                          sizeof (struct acpi_table_header);
+
+        /* Allocate an XSDT */
+
+        new_table = ACPI_MEM_CALLOCATE (table_size);
+        if (!new_table) {
+                return (AE_NO_MEMORY);
+        }
+
+        /* Copy the header and set the length */
+
+        ACPI_MEMCPY (new_table, table_info->pointer, sizeof (struct acpi_table_header));
+        new_table->length = (u32) table_size;
+
+        /* Copy the table pointers */
+
+        for (i = 0; i < acpi_gbl_rsdt_table_count; i++) {
+                if (acpi_gbl_RSDP->revision < 2) {
+                        ACPI_STORE_ADDRESS (new_table->table_offset_entry[i],
+                                (ACPI_CAST_PTR (struct rsdt_descriptor_rev1, table_info->pointer))->table_offset_entry[i]);
+                }
+                else {
+                        new_table->table_offset_entry[i] =
+                                (ACPI_CAST_PTR (XSDT_DESCRIPTOR, table_info->pointer))->table_offset_entry[i];
+                }
+        }
+
+        /* Delete the original table (either mapped or in a buffer) */
+
+        acpi_tb_delete_single_table (table_info);
+
+        /* Point the table descriptor to the new table */
+
+        table_info->pointer     = ACPI_CAST_PTR (struct acpi_table_header, new_table);
+        table_info->length      = table_size;
+        table_info->allocation  = ACPI_MEM_ALLOCATED;
+
+        return (AE_OK);
+}
+
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_init_generic_address
+ *
+ * PARAMETERS:  new_gas_struct      - GAS struct to be initialized
+ *              register_bit_width  - Width of this register
+ *              Address             - Address of the register
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Initialize a GAS structure.
+ *
+ ******************************************************************************/
+
+static void
+acpi_tb_init_generic_address (
+        struct acpi_generic_address     *new_gas_struct,
+        u8                              register_bit_width,
+        acpi_physical_address           address)
+{
+
+        ACPI_STORE_ADDRESS (new_gas_struct->address, address);
+
+        new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO;
+        new_gas_struct->register_bit_width = register_bit_width;
+        new_gas_struct->register_bit_offset = 0;
+        new_gas_struct->access_width    = 0;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_fadt1
+ *
+ * PARAMETERS:  local_fadt      - Pointer to new FADT
+ *              original_fadt   - Pointer to old FADT
+ *
+ * RETURN:      Populates local_fadt
+ *
+ * DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format
+ *
+ ******************************************************************************/
+
+static void
+acpi_tb_convert_fadt1 (
+        struct fadt_descriptor_rev2    *local_fadt,
+        struct fadt_descriptor_rev1    *original_fadt)
+{
+
+
+        /* ACPI 1.0 FACS */
+        /* The BIOS stored FADT should agree with Revision 1.0 */
+        acpi_fadt_is_v1 = 1;
+
+        /*
+         * Copy the table header and the common part of the tables.
+         *
+         * The 2.0 table is an extension of the 1.0 table, so the entire 1.0
+         * table can be copied first, then expand some fields to 64 bits.
+         */
+        ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev1));
+
+        /* Convert table pointers to 64-bit fields */
+
+        ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
+        ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
+
+        /*
+         * System Interrupt Model isn't used in ACPI 2.0 (local_fadt->Reserved1 = 0;)
+         */
+
+        /*
+         * This field is set by the OEM to convey the preferred power management
+         * profile to OSPM. It doesn't have any 1.0 equivalence.  Since we don't
+         * know what kind of 32-bit system this is, we will use "unspecified".
+         */
+        local_fadt->prefer_PM_profile = PM_UNSPECIFIED;
+
+        /*
+         * Processor Performance State Control. This is the value OSPM writes to
+         * the SMI_CMD register to assume processor performance state control
+         * responsibility. There isn't any equivalence in 1.0, but as many 1.x
+         * ACPI tables contain _PCT and _PSS we also keep this value, unless
+         * acpi_strict is set.
+         */
+        if (acpi_strict)
+                local_fadt->pstate_cnt = 0;
+
+        /*
+         * Support for the _CST object and C States change notification.
+         * This data item hasn't any 1.0 equivalence so leave it zero.
+         */
+        local_fadt->cst_cnt = 0;
+
+        /*
+         * FADT Rev 2 was an interim FADT released between ACPI 1.0 and ACPI 2.0.
+         * It primarily adds the FADT reset mechanism.
+         */
+        if ((original_fadt->revision == 2) &&
+                (original_fadt->length == sizeof (struct fadt_descriptor_rev2_minus))) {
+                /*
+                 * Grab the entire generic address struct, plus the 1-byte reset value
+                 * that immediately follows.
+                 */
+                ACPI_MEMCPY (&local_fadt->reset_register,
+                        &(ACPI_CAST_PTR (struct fadt_descriptor_rev2_minus, original_fadt))->reset_register,
+                        sizeof (struct acpi_generic_address) + 1);
+        }
+        else {
+                /*
+                 * Since there isn't any equivalence in 1.0 and since it is highly
+                 * likely that a 1.0 system has legacy support.
+                 */
+                local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES;
+        }
+
+        /*
+         * Convert the V1.0 block addresses to V2.0 GAS structures
+         */
+        acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk, local_fadt->pm1_evt_len,
+                          (acpi_physical_address)   local_fadt->V1_pm1a_evt_blk);
+        acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk, local_fadt->pm1_evt_len,
+                          (acpi_physical_address)   local_fadt->V1_pm1b_evt_blk);
+        acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk, local_fadt->pm1_cnt_len,
+                          (acpi_physical_address)   local_fadt->V1_pm1a_cnt_blk);
+        acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk, local_fadt->pm1_cnt_len,
+                          (acpi_physical_address)   local_fadt->V1_pm1b_cnt_blk);
+        acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk, local_fadt->pm2_cnt_len,
+                          (acpi_physical_address)   local_fadt->V1_pm2_cnt_blk);
+        acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk, local_fadt->pm_tm_len,
+                          (acpi_physical_address)   local_fadt->V1_pm_tmr_blk);
+        acpi_tb_init_generic_address (&local_fadt->xgpe0_blk, 0,
+                          (acpi_physical_address)   local_fadt->V1_gpe0_blk);
+        acpi_tb_init_generic_address (&local_fadt->xgpe1_blk, 0,
+                          (acpi_physical_address)   local_fadt->V1_gpe1_blk);
+
+        /* Create separate GAS structs for the PM1 Enable registers */
+
+        acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
+                 (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+                 (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
+                        ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+
+        /* PM1B is optional; leave null if not present */
+
+        if (local_fadt->xpm1b_evt_blk.address) {
+                acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
+                         (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+                         (acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
+                                ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_fadt2
+ *
+ * PARAMETERS:  local_fadt      - Pointer to new FADT
+ *              original_fadt   - Pointer to old FADT
+ *
+ * RETURN:      Populates local_fadt
+ *
+ * DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
+ *              Handles optional "X" fields.
+ *
+ ******************************************************************************/
+
+static void
+acpi_tb_convert_fadt2 (
+        struct fadt_descriptor_rev2    *local_fadt,
+        struct fadt_descriptor_rev2    *original_fadt)
+{
+
+        /* We have an ACPI 2.0 FADT but we must copy it to our local buffer */
+
+        ACPI_MEMCPY (local_fadt, original_fadt, sizeof (struct fadt_descriptor_rev2));
+
+        /*
+         * "X" fields are optional extensions to the original V1.0 fields, so
+         * we must selectively expand V1.0 fields if the corresponding X field
+         * is zero.
+         */
+        if (!(local_fadt->xfirmware_ctrl)) {
+                ACPI_STORE_ADDRESS (local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl);
+        }
+
+        if (!(local_fadt->Xdsdt)) {
+                ACPI_STORE_ADDRESS (local_fadt->Xdsdt, local_fadt->V1_dsdt);
+        }
+
+        if (!(local_fadt->xpm1a_evt_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xpm1a_evt_blk,
+                        local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1a_evt_blk);
+        }
+
+        if (!(local_fadt->xpm1b_evt_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xpm1b_evt_blk,
+                        local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1b_evt_blk);
+        }
+
+        if (!(local_fadt->xpm1a_cnt_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xpm1a_cnt_blk,
+                        local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1a_cnt_blk);
+        }
+
+        if (!(local_fadt->xpm1b_cnt_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xpm1b_cnt_blk,
+                        local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1b_cnt_blk);
+        }
+
+        if (!(local_fadt->xpm2_cnt_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xpm2_cnt_blk,
+                        local_fadt->pm2_cnt_len, (acpi_physical_address) local_fadt->V1_pm2_cnt_blk);
+        }
+
+        if (!(local_fadt->xpm_tmr_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xpm_tmr_blk,
+                        local_fadt->pm_tm_len, (acpi_physical_address) local_fadt->V1_pm_tmr_blk);
+        }
+
+        if (!(local_fadt->xgpe0_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xgpe0_blk,
+                        0, (acpi_physical_address) local_fadt->V1_gpe0_blk);
+        }
+
+        if (!(local_fadt->xgpe1_blk.address)) {
+                acpi_tb_init_generic_address (&local_fadt->xgpe1_blk,
+                        0, (acpi_physical_address) local_fadt->V1_gpe1_blk);
+        }
+
+        /* Create separate GAS structs for the PM1 Enable registers */
+
+        acpi_tb_init_generic_address (&acpi_gbl_xpm1a_enable,
+                (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+                (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address +
+                        ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+        acpi_gbl_xpm1a_enable.address_space_id = local_fadt->xpm1a_evt_blk.address_space_id;
+
+        /* PM1B is optional; leave null if not present */
+
+        if (local_fadt->xpm1b_evt_blk.address) {
+                acpi_tb_init_generic_address (&acpi_gbl_xpm1b_enable,
+                        (u8) ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len),
+                        (acpi_physical_address) (local_fadt->xpm1b_evt_blk.address +
+                                ACPI_DIV_2 (acpi_gbl_FADT->pm1_evt_len)));
+                acpi_gbl_xpm1b_enable.address_space_id = local_fadt->xpm1b_evt_blk.address_space_id;
+        }
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_table_fadt
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
+ *              ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
+ *              copied to the local FADT.  The ACPI CA software uses this
+ *              local FADT. Thus a significant amount of special #ifdef
+ *              type codeing is saved.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_convert_table_fadt (void)
+{
+        struct fadt_descriptor_rev2    *local_fadt;
+        struct acpi_table_desc         *table_desc;
+
+
+        ACPI_FUNCTION_TRACE ("tb_convert_table_fadt");
+
+
+        /*
+         * acpi_gbl_FADT is valid. Validate the FADT length. The table must be
+         * at least as long as the version 1.0 FADT
+         */
+        if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev1)) {
+                ACPI_REPORT_ERROR (("FADT is invalid, too short: 0x%X\n", acpi_gbl_FADT->length));
+                return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
+        }
+
+        /* Allocate buffer for the ACPI 2.0(+) FADT */
+
+        local_fadt = ACPI_MEM_CALLOCATE (sizeof (struct fadt_descriptor_rev2));
+        if (!local_fadt) {
+                return_ACPI_STATUS (AE_NO_MEMORY);
+        }
+
+        if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) {
+                if (acpi_gbl_FADT->length < sizeof (struct fadt_descriptor_rev2)) {
+                        /* Length is too short to be a V2.0 table */
+
+                        ACPI_REPORT_WARNING (("Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table\n",
+                                         acpi_gbl_FADT->length, acpi_gbl_FADT->revision));
+
+                        acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
+                }
+                else {
+                        /* Valid V2.0 table */
+
+                        acpi_tb_convert_fadt2 (local_fadt, acpi_gbl_FADT);
+                }
+        }
+        else {
+                /* Valid V1.0 table */
+
+                acpi_tb_convert_fadt1 (local_fadt, (void *) acpi_gbl_FADT);
+        }
+
+        /*
+         * Global FADT pointer will point to the new common V2.0 FADT
+         */
+        acpi_gbl_FADT = local_fadt;
+        acpi_gbl_FADT->length = sizeof (FADT_DESCRIPTOR);
+
+        /* Free the original table */
+
+        table_desc = acpi_gbl_table_lists[ACPI_TABLE_FADT].next;
+        acpi_tb_delete_single_table (table_desc);
+
+        /* Install the new table */
+
+        table_desc->pointer     = ACPI_CAST_PTR (struct acpi_table_header, acpi_gbl_FADT);
+        table_desc->allocation  = ACPI_MEM_ALLOCATED;
+        table_desc->length      = sizeof (struct fadt_descriptor_rev2);
+
+        /* Dump the entire FADT */
+
+        ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
+                "Hex dump of common internal FADT, size %d (%X)\n",
+                acpi_gbl_FADT->length, acpi_gbl_FADT->length));
+        ACPI_DUMP_BUFFER ((u8 *) (acpi_gbl_FADT), acpi_gbl_FADT->length);
+
+        return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_tb_convert_table_facs
+ *
+ * PARAMETERS:  table_info      - Info for currently installed FACS
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
+ *              table format.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_tb_build_common_facs (
+        struct acpi_table_desc          *table_info)
+{
+
+        ACPI_FUNCTION_TRACE ("tb_build_common_facs");
+
+
+        /* Absolute minimum length is 24, but the ACPI spec says 64 */
+
+        if (acpi_gbl_FACS->length < 24) {
+                ACPI_REPORT_ERROR (("Invalid FACS table length: 0x%X\n", acpi_gbl_FACS->length));
+                return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
+        }
+
+        if (acpi_gbl_FACS->length < 64) {
+                ACPI_REPORT_WARNING (("FACS is shorter than the ACPI specification allows: 0x%X, using anyway\n",
+                        acpi_gbl_FACS->length));
+        }
+
+        /* Copy fields to the new FACS */
+
+        acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock);
+
+        if ((acpi_gbl_RSDP->revision < 2) ||
+                (acpi_gbl_FACS->length < 32) ||
+                (!(acpi_gbl_FACS->xfirmware_waking_vector))) {
+                /* ACPI 1.0 FACS or short table or optional X_ field is zero */
+
+                acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR (u64, &(acpi_gbl_FACS->firmware_waking_vector));
+                acpi_gbl_common_fACS.vector_width = 32;
+        }
+        else {
+                /* ACPI 2.0 FACS with valid X_ field */
+
+                acpi_gbl_common_fACS.firmware_waking_vector = &acpi_gbl_FACS->xfirmware_waking_vector;
+                acpi_gbl_common_fACS.vector_width = 64;
+        }
+
+        return_ACPI_STATUS (AE_OK);
+}
+
+