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Diffstat (limited to 'drivers/acpi/tables/tbconvrt.c')
| -rw-r--r-- | drivers/acpi/tables/tbconvrt.c | 564 |
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); +} + + |