diff options
Diffstat (limited to 'drivers/acpi/tables/tbfadt.c')
| -rw-r--r-- | drivers/acpi/tables/tbfadt.c | 380 |
1 files changed, 380 insertions, 0 deletions
diff --git a/drivers/acpi/tables/tbfadt.c b/drivers/acpi/tables/tbfadt.c new file mode 100644 index 00000000000..2336a72fab4 --- /dev/null +++ b/drivers/acpi/tables/tbfadt.c @@ -0,0 +1,380 @@ +/****************************************************************************** + * + * Module Name: tbfadt - FADT table utilities + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2006, 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("tbfadt") + +/* Local prototypes */ +static void inline +acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, + u8 bit_width, u64 address); + +static void acpi_tb_fadt_register_error(char *register_name, u32 value); + +static void acpi_tb_convert_fadt(void); + +static void acpi_tb_validate_fadt(void); + +/* Table used for conversion of FADT to common format */ + +typedef struct acpi_fadt_conversion { + u8 target; + u8 source; + u8 length; + +} acpi_fadt_conversion; + +static struct acpi_fadt_conversion fadt_conversion_table[] = { + {ACPI_FADT_OFFSET(xpm1a_event_block), + ACPI_FADT_OFFSET(pm1a_event_block), + ACPI_FADT_OFFSET(pm1_event_length)}, + {ACPI_FADT_OFFSET(xpm1b_event_block), + ACPI_FADT_OFFSET(pm1b_event_block), + ACPI_FADT_OFFSET(pm1_event_length)}, + {ACPI_FADT_OFFSET(xpm1a_control_block), + ACPI_FADT_OFFSET(pm1a_control_block), + ACPI_FADT_OFFSET(pm1_control_length)}, + {ACPI_FADT_OFFSET(xpm1b_control_block), + ACPI_FADT_OFFSET(pm1b_control_block), + ACPI_FADT_OFFSET(pm1_control_length)}, + {ACPI_FADT_OFFSET(xpm2_control_block), + ACPI_FADT_OFFSET(pm2_control_block), + ACPI_FADT_OFFSET(pm2_control_length)}, + {ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block), + ACPI_FADT_OFFSET(pm_timer_length)}, + {ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block), + ACPI_FADT_OFFSET(gpe0_block_length)}, + {ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block), + ACPI_FADT_OFFSET(gpe1_block_length)} +}; + +#define ACPI_FADT_CONVERSION_ENTRIES (sizeof (fadt_conversion_table) / sizeof (struct acpi_fadt_conversion)) + +/******************************************************************************* + * + * FUNCTION: acpi_tb_init_generic_address + * + * PARAMETERS: new_gas_struct - GAS struct to be initialized + * bit_width - Width of this register + * Address - Address of the register + * + * RETURN: None + * + * DESCRIPTION: Initialize a GAS structure. + * + ******************************************************************************/ + +static void inline +acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, + u8 bit_width, u64 address) +{ + + ACPI_MOVE_64_TO_64(&new_gas_struct->address, &address); + new_gas_struct->space_id = ACPI_ADR_SPACE_SYSTEM_IO; + new_gas_struct->bit_width = bit_width; + new_gas_struct->bit_offset = 0; + new_gas_struct->access_width = 0; +} + +/******************************************************************************* + * + * FUNCTION: acpi_tb_parse_fadt + * + * PARAMETERS: table_index - Index for the FADT + * Flags - Flags + * + * RETURN: None + * + * DESCRIPTION: Initialize the FADT, DSDT and FACS tables + * (FADT contains the addresses of the DSDT and FACS) + * + ******************************************************************************/ + +void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags) +{ + u32 length; + struct acpi_table_header *table; + + /* + * Special case for the FADT because of multiple versions and the fact + * that it contains pointers to both the DSDT and FACS tables. + * + * Get a local copy of the FADT and convert it to a common format + * Map entire FADT, assumed to be smaller than one page. + */ + length = acpi_gbl_root_table_list.tables[table_index].length; + + table = + acpi_os_map_memory(acpi_gbl_root_table_list.tables[table_index]. + address, length); + if (!table) { + return; + } + + /* + * Validate the FADT checksum before we copy the table. Ignore + * checksum error as we want to try to get the DSDT and FACS. + */ + (void)acpi_tb_verify_checksum(table, length); + + /* Copy the entire FADT locally */ + + ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); + + ACPI_MEMCPY(&acpi_gbl_FADT, table, + ACPI_MIN(length, sizeof(struct acpi_table_fadt))); + acpi_os_unmap_memory(table, length); + + /* Convert local FADT to the common internal format */ + + acpi_tb_convert_fadt(); + + /* Extract the DSDT and FACS tables from the FADT */ + + acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, + flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); + + acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xfacs, + flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS); + + /* Validate important FADT values */ + + acpi_tb_validate_fadt(); +} + +/******************************************************************************* + * + * FUNCTION: acpi_tb_convert_fadt + * + * PARAMETERS: None, uses acpi_gbl_FADT + * + * RETURN: None + * + * DESCRIPTION: Converts all versions of the FADT to a common internal format. + * + * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), and must contain + * a copy of the actual FADT. + * + * ACPICA will use the "X" fields of the FADT for all addresses. + * + * "X" fields are optional extensions to the original V1.0 fields. Even if + * they are present in the structure, they can be optionally not used by + * setting them to zero. Therefore, we must selectively expand V1.0 fields + * if the corresponding X field is zero. + * + * For ACPI 1.0 FADTs, all address fields are expanded to the corresponding + * "X" fields. + * + * For ACPI 2.0 FADTs, any "X" fields that are NULL are filled in by + * expanding the corresponding ACPI 1.0 field. + * + ******************************************************************************/ + +static void acpi_tb_convert_fadt(void) +{ + u8 pm1_register_length; + struct acpi_generic_address *target; + acpi_native_uint i; + + /* Expand the FACS and DSDT addresses as necessary */ + + if (!acpi_gbl_FADT.Xfacs) { + acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; + } + + if (!acpi_gbl_FADT.Xdsdt) { + acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; + } + + /* + * Expand the 32-bit V1.0 addresses to the 64-bit "X" generic address + * structures as necessary. + */ + for (i = 0; i < ACPI_FADT_CONVERSION_ENTRIES; i++) { + target = + ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, + fadt_conversion_table[i].target); + + /* Expand only if the X target is null */ + + if (!target->address) { + acpi_tb_init_generic_address(target, + *ACPI_ADD_PTR(u8, + &acpi_gbl_FADT, + fadt_conversion_table + [i].length), + (u64) * ACPI_ADD_PTR(u32, + &acpi_gbl_FADT, + fadt_conversion_table + [i]. + source)); + } + } + + /* + * Calculate separate GAS structs for the PM1 Enable registers. + * These addresses do not appear (directly) in the FADT, so it is + * useful to calculate them once, here. + * + * The PM event blocks are split into two register blocks, first is the + * PM Status Register block, followed immediately by the PM Enable Register + * block. Each is of length (pm1_event_length/2) + */ + pm1_register_length = (u8) ACPI_DIV_2(acpi_gbl_FADT.pm1_event_length); + + /* PM1A is required */ + + acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable, + pm1_register_length, + (acpi_gbl_FADT.xpm1a_event_block.address + + pm1_register_length)); + + /* PM1B is optional; leave null if not present */ + + if (acpi_gbl_FADT.xpm1b_event_block.address) { + acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable, + pm1_register_length, + (acpi_gbl_FADT.xpm1b_event_block. + address + pm1_register_length)); + } + + /* Global FADT is the new common V2.0 FADT */ + + acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); +} + +/****************************************************************************** + * + * FUNCTION: acpi_tb_validate_fadt + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Validate various ACPI registers in the FADT + * + ******************************************************************************/ + +static void acpi_tb_validate_fadt(void) +{ + + /* These length fields have a minimum value */ + + if (acpi_gbl_FADT.pm1_event_length < 4) { + acpi_tb_fadt_register_error("Pm1EventLength", + (u32) acpi_gbl_FADT. + pm1_event_length); + } + + if (acpi_gbl_FADT.pm_timer_length < 4) { + acpi_tb_fadt_register_error("PmTimerLength", + (u32) acpi_gbl_FADT. + pm_timer_length); + } + + /* These length and address fields must be non-zero */ + + if (!acpi_gbl_FADT.pm1_control_length) { + acpi_tb_fadt_register_error("Pm1ControlLength", 0); + } + + if (!acpi_gbl_FADT.xpm1a_event_block.address) { + acpi_tb_fadt_register_error("XPm1aEventBlock.Address", 0); + } + + if (!acpi_gbl_FADT.xpm1a_control_block.address) { + acpi_tb_fadt_register_error("XPm1aControlBlock.Address", 0); + } + + if (!acpi_gbl_FADT.xpm_timer_block.address) { + acpi_tb_fadt_register_error("XPmTimerBlock.Address", 0); + } + + /* If PM2 block is present, must have non-zero length */ + + if ((acpi_gbl_FADT.xpm2_control_block.address && + !acpi_gbl_FADT.pm2_control_length)) { + acpi_tb_fadt_register_error("Pm2ControlLength", + (u32) acpi_gbl_FADT. + pm2_control_length); + } + + /* Length of any valid GPE blocks must be a multiple of 2 */ + + if (acpi_gbl_FADT.xgpe0_block.address && + (acpi_gbl_FADT.gpe0_block_length & 1)) { + acpi_tb_fadt_register_error("Gpe0BlockLength", + (u32) acpi_gbl_FADT. + gpe0_block_length); + } + + if (acpi_gbl_FADT.xgpe1_block.address && + (acpi_gbl_FADT.gpe1_block_length & 1)) { + acpi_tb_fadt_register_error("Gpe1BlockLength", + (u32) acpi_gbl_FADT. + gpe1_block_length); + } +} + +/******************************************************************************* + * + * FUNCTION: acpi_tb_fadt_register_error + * + * PARAMETERS: register_name - Pointer to string identifying register + * Value - Actual register contents value + * + * RETURN: None + * + * DESCRIPTION: Display FADT warning message + * + ******************************************************************************/ + +static void acpi_tb_fadt_register_error(char *register_name, u32 value) +{ + + ACPI_WARNING((AE_INFO, "Invalid FADT value \"%s\" = %X", + register_name, value)); +} |