litmus-rt.git - The LITMUS^RT kernel.

diff options

author	Ingo Molnar <mingo@elte.hu>	2009-03-12 06:50:15 -0400
committer	Ingo Molnar <mingo@elte.hu>	2009-03-12 06:50:15 -0400
commit	a98fe7f3425c6b4e90de16f8da63b0429a8fed08 (patch)
tree	d82a02398bc62e80b6726d07becd5244be6d4127 /fs/btrfs/ordered-data.c
parent	bb7f5f6c26d0a304fb3af92591a1dddd39b6ac61 (diff)
parent	8229d754383e8cd905c38b56bd7365c7fc10dfc1 (diff)
parent	12074fa1073013dd11f1cff41db018d5cff4ecd9 (diff)
parent	5e47c478b0b69bc9bc3ba544e4b1ca3268f98fef (diff)
parent	afcfe024aebd74b0984a41af9a34e009cf5badaf (diff)

Merge branches 'x86/asm', 'x86/debug', 'x86/mm', 'x86/setup', 'x86/urgent' and 'linus' into x86/core

/****************************************************************************** * * Module Name: tbfadt - FADT table utilities * *****************************************************************************/ /* * Copyright (C) 2000 - 2013, Intel Corp. * 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 "accommon.h" #include "actables.h" #define _COMPONENT ACPI_TABLES ACPI_MODULE_NAME("tbfadt") /* Local prototypes */ static void acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, u8 space_id, u8 byte_width, u64 address, char *register_name); static void acpi_tb_convert_fadt(void); static void acpi_tb_validate_fadt(void); static void acpi_tb_setup_fadt_registers(void); /* Table for conversion of FADT to common internal format and FADT validation */ typedef struct acpi_fadt_info { char *name; u16 address64; u16 address32; u16 length; u8 default_length; u8 type; } acpi_fadt_info; #define ACPI_FADT_OPTIONAL 0 #define ACPI_FADT_REQUIRED 1 #define ACPI_FADT_SEPARATE_LENGTH 2 static struct acpi_fadt_info fadt_info_table[] = { {"Pm1aEventBlock", ACPI_FADT_OFFSET(xpm1a_event_block), ACPI_FADT_OFFSET(pm1a_event_block), ACPI_FADT_OFFSET(pm1_event_length), ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ ACPI_FADT_REQUIRED}, {"Pm1bEventBlock", ACPI_FADT_OFFSET(xpm1b_event_block), ACPI_FADT_OFFSET(pm1b_event_block), ACPI_FADT_OFFSET(pm1_event_length), ACPI_PM1_REGISTER_WIDTH * 2, /* Enable + Status register */ ACPI_FADT_OPTIONAL}, {"Pm1aControlBlock", ACPI_FADT_OFFSET(xpm1a_control_block), ACPI_FADT_OFFSET(pm1a_control_block), ACPI_FADT_OFFSET(pm1_control_length), ACPI_PM1_REGISTER_WIDTH, ACPI_FADT_REQUIRED}, {"Pm1bControlBlock", ACPI_FADT_OFFSET(xpm1b_control_block), ACPI_FADT_OFFSET(pm1b_control_block), ACPI_FADT_OFFSET(pm1_control_length), ACPI_PM1_REGISTER_WIDTH, ACPI_FADT_OPTIONAL}, {"Pm2ControlBlock", ACPI_FADT_OFFSET(xpm2_control_block), ACPI_FADT_OFFSET(pm2_control_block), ACPI_FADT_OFFSET(pm2_control_length), ACPI_PM2_REGISTER_WIDTH, ACPI_FADT_SEPARATE_LENGTH}, {"PmTimerBlock", ACPI_FADT_OFFSET(xpm_timer_block), ACPI_FADT_OFFSET(pm_timer_block), ACPI_FADT_OFFSET(pm_timer_length), ACPI_PM_TIMER_WIDTH, ACPI_FADT_SEPARATE_LENGTH}, /* ACPI 5.0A: Timer is optional */ {"Gpe0Block", ACPI_FADT_OFFSET(xgpe0_block), ACPI_FADT_OFFSET(gpe0_block), ACPI_FADT_OFFSET(gpe0_block_length), 0, ACPI_FADT_SEPARATE_LENGTH}, {"Gpe1Block", ACPI_FADT_OFFSET(xgpe1_block), ACPI_FADT_OFFSET(gpe1_block), ACPI_FADT_OFFSET(gpe1_block_length), 0, ACPI_FADT_SEPARATE_LENGTH} }; #define ACPI_FADT_INFO_ENTRIES \ (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info)) /* Table used to split Event Blocks into separate status/enable registers */ typedef struct acpi_fadt_pm_info { struct acpi_generic_address *target; u16 source; u8 register_num; } acpi_fadt_pm_info; static struct acpi_fadt_pm_info fadt_pm_info_table[] = { {&acpi_gbl_xpm1a_status, ACPI_FADT_OFFSET(xpm1a_event_block), 0}, {&acpi_gbl_xpm1a_enable, ACPI_FADT_OFFSET(xpm1a_event_block), 1}, {&acpi_gbl_xpm1b_status, ACPI_FADT_OFFSET(xpm1b_event_block), 0}, {&acpi_gbl_xpm1b_enable, ACPI_FADT_OFFSET(xpm1b_event_block), 1} }; #define ACPI_FADT_PM_INFO_ENTRIES \ (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info)) /******************************************************************************* * * FUNCTION: acpi_tb_init_generic_address * * PARAMETERS: generic_address - GAS struct to be initialized * space_id - ACPI Space ID for this register * byte_width - Width of this register * address - Address of the register * * RETURN: None * * DESCRIPTION: Initialize a Generic Address Structure (GAS) * See the ACPI specification for a full description and * definition of this structure. * ******************************************************************************/ static void acpi_tb_init_generic_address(struct acpi_generic_address *generic_address, u8 space_id, u8 byte_width, u64 address, char *register_name) { u8 bit_width; /* Bit width field in the GAS is only one byte long, 255 max */ bit_width = (u8)(byte_width * 8); if (byte_width > 31) { /* (31*8)=248 */ ACPI_ERROR((AE_INFO, "%s - 32-bit FADT register is too long (%u bytes, %u bits) " "to convert to GAS struct - 255 bits max, truncating", register_name, byte_width, (byte_width * 8))); bit_width = 255; } /* * The 64-bit Address field is non-aligned in the byte packed * GAS struct. */ ACPI_MOVE_64_TO_64(&generic_address->address, &address); /* All other fields are byte-wide */ generic_address->space_id = space_id; generic_address->bit_width = bit_width; generic_address->bit_offset = 0; generic_address->access_width = 0; /* Access width ANY */ } /******************************************************************************* * * FUNCTION: acpi_tb_parse_fadt * * PARAMETERS: table_index - Index for the FADT * * RETURN: None * * DESCRIPTION: Initialize the FADT, DSDT and FACS tables * (FADT contains the addresses of the DSDT and FACS) * ******************************************************************************/ void acpi_tb_parse_fadt(u32 table_index) { u32 length; struct acpi_table_header *table; /* * The FADT has multiple versions with different lengths, * and 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); /* Create a local copy of the FADT in common ACPI 2.0+ format */ acpi_tb_create_local_fadt(table, length); /* All done with the real FADT, unmap it */ acpi_os_unmap_memory(table, length); /* Obtain the DSDT and FACS tables via their addresses within the FADT */ acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT.Xdsdt, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT); /* If Hardware Reduced flag is set, there is no FACS */ if (!acpi_gbl_reduced_hardware) { acpi_tb_install_table((acpi_physical_address) acpi_gbl_FADT. Xfacs, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS); } } /******************************************************************************* * * FUNCTION: acpi_tb_create_local_fadt * * PARAMETERS: table - Pointer to BIOS FADT * length - Length of the table * * RETURN: None * * DESCRIPTION: Get a local copy of the FADT and convert it to a common format. * Performs validation on some important FADT fields. * * NOTE: We create a local copy of the FADT regardless of the version. * ******************************************************************************/ void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) { /* * Check if the FADT is larger than the largest table that we expect * (the ACPI 5.0 version). If so, truncate the table, and issue * a warning. */ if (length > sizeof(struct acpi_table_fadt)) { ACPI_BIOS_WARNING((AE_INFO, "FADT (revision %u) is longer than ACPI 5.0 version, " "truncating length %u to %u", table->revision, length, (u32)sizeof(struct acpi_table_fadt))); } /* Clear the entire local FADT */ ACPI_MEMSET(&acpi_gbl_FADT, 0, sizeof(struct acpi_table_fadt)); /* Copy the original FADT, up to sizeof (struct acpi_table_fadt) */ ACPI_MEMCPY(&acpi_gbl_FADT, table, ACPI_MIN(length, sizeof(struct acpi_table_fadt))); /* Take a copy of the Hardware Reduced flag */ acpi_gbl_reduced_hardware = FALSE; if (acpi_gbl_FADT.flags & ACPI_FADT_HW_REDUCED) { acpi_gbl_reduced_hardware = TRUE; } /* Convert the local copy of the FADT to the common internal format */ acpi_tb_convert_fadt(); /* Validate FADT values now, before we make any changes */ acpi_tb_validate_fadt(); /* Initialize the global ACPI register structures */ acpi_tb_setup_fadt_registers(); } /******************************************************************************* * * 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. * Expand 32-bit addresses to 64-bit as necessary. * * NOTE: acpi_gbl_FADT must be of size (struct acpi_table_fadt), * and must contain a copy of the actual FADT. * * Notes on 64-bit register addresses: * * After this FADT conversion, later ACPICA code will only use the 64-bit "X" * fields of the FADT for all ACPI register addresses. * * The 64-bit "X" fields are optional extensions to the original 32-bit FADT * V1.0 fields. Even if they are present in the FADT, they are optional and * are unused if the BIOS sets them to zero. Therefore, we must copy/expand * 32-bit V1.0 fields if the corresponding X field is zero. * * For ACPI 1.0 FADTs, all 32-bit address fields are expanded to the * corresponding "X" fields in the internal FADT. * * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded * to the corresponding 64-bit X fields. For compatibility with other ACPI * implementations, we ignore the 64-bit field if the 32-bit field is valid, * regardless of whether the host OS is 32-bit or 64-bit. * ******************************************************************************/ static void acpi_tb_convert_fadt(void) { struct acpi_generic_address *address64; u32 address32; u32 i; /* * Expand the 32-bit FACS and DSDT addresses to 64-bit as necessary. * Later code will always use the X 64-bit field. Also, check for an * address mismatch between the 32-bit and 64-bit address fields * (FIRMWARE_CTRL/X_FIRMWARE_CTRL, DSDT/X_DSDT) which would indicate * the presence of two FACS or two DSDT tables. */ if (!acpi_gbl_FADT.Xfacs) { acpi_gbl_FADT.Xfacs = (u64) acpi_gbl_FADT.facs; } else if (acpi_gbl_FADT.facs && (acpi_gbl_FADT.Xfacs != (u64) acpi_gbl_FADT.facs)) { ACPI_WARNING((AE_INFO, "32/64 FACS address mismatch in FADT - two FACS tables!")); } if (!acpi_gbl_FADT.Xdsdt) { acpi_gbl_FADT.Xdsdt = (u64) acpi_gbl_FADT.dsdt; } else if (acpi_gbl_FADT.dsdt && (acpi_gbl_FADT.Xdsdt != (u64) acpi_gbl_FADT.dsdt)) { ACPI_WARNING((AE_INFO, "32/64 DSDT address mismatch in FADT - two DSDT tables!")); } /* * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which * should be zero are indeed zero. This will workaround BIOSs that * inadvertently place values in these fields. * * The ACPI 1.0 reserved fields that will be zeroed are the bytes located * at offset 45, 55, 95, and the word located at offset 109, 110. * * Note: The FADT revision value is unreliable. Only the length can be * trusted. */ if (acpi_gbl_FADT.header.length <= ACPI_FADT_V2_SIZE) { acpi_gbl_FADT.preferred_profile = 0; acpi_gbl_FADT.pstate_control = 0; acpi_gbl_FADT.cst_control = 0; acpi_gbl_FADT.boot_flags = 0; } /* Update the local FADT table header length */ acpi_gbl_FADT.header.length = sizeof(struct acpi_table_fadt); /* * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X" * generic address structures as necessary. Later code will always use * the 64-bit address structures. * * March 2009: * We now always use the 32-bit address if it is valid (non-null). This * is not in accordance with the ACPI specification which states that * the 64-bit address supersedes the 32-bit version, but we do this for * compatibility with other ACPI implementations. Most notably, in the * case where both the 32 and 64 versions are non-null, we use the 32-bit * version. This is the only address that is guaranteed to have been * tested by the BIOS manufacturer. */ for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { address32 = *ACPI_ADD_PTR(u32, &acpi_gbl_FADT, fadt_info_table[i].address32); address64 = ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, fadt_info_table[i].address64); /* * If both 32- and 64-bit addresses are valid (non-zero), * they must match. */ if (address64->address && address32 && (address64->address != (u64)address32)) { ACPI_BIOS_ERROR((AE_INFO, "32/64X address mismatch in FADT/%s: " "0x%8.8X/0x%8.8X%8.8X, using 32", fadt_info_table[i].name, address32, ACPI_FORMAT_UINT64(address64-> address))); } /* Always use 32-bit address if it is valid (non-null) */ if (address32) { /* * Copy the 32-bit address to the 64-bit GAS structure. The * Space ID is always I/O for 32-bit legacy address fields */ acpi_tb_init_generic_address(address64, ACPI_ADR_SPACE_SYSTEM_IO, *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, fadt_info_table [i].length), (u64) address32, fadt_info_table[i].name); } } } /******************************************************************************* * * FUNCTION: acpi_tb_validate_fadt * * PARAMETERS: table - Pointer to the FADT to be validated * * RETURN: None * * DESCRIPTION: Validate various important fields within the FADT. If a problem * is found, issue a message, but no status is returned. * Used by both the table manager and the disassembler. * * Possible additional checks: * (acpi_gbl_FADT.pm1_event_length >= 4) * (acpi_gbl_FADT.pm1_control_length >= 2) * (acpi_gbl_FADT.pm_timer_length >= 4) * Gpe block lengths must be multiple of 2 * ******************************************************************************/ static void acpi_tb_validate_fadt(void) { char *name; struct acpi_generic_address *address64; u8 length; u32 i; /* * Check for FACS and DSDT address mismatches. An address mismatch between * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and * DSDT/X_DSDT) would indicate the presence of two FACS or two DSDT tables. */ if (acpi_gbl_FADT.facs && (acpi_gbl_FADT.Xfacs != (u64)acpi_gbl_FADT.facs)) { ACPI_BIOS_WARNING((AE_INFO, "32/64X FACS address mismatch in FADT - " "0x%8.8X/0x%8.8X%8.8X, using 32", acpi_gbl_FADT.facs, ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xfacs))); acpi_gbl_FADT.Xfacs = (u64)acpi_gbl_FADT.facs; } if (acpi_gbl_FADT.dsdt && (acpi_gbl_FADT.Xdsdt != (u64)acpi_gbl_FADT.dsdt)) { ACPI_BIOS_WARNING((AE_INFO, "32/64X DSDT address mismatch in FADT - " "0x%8.8X/0x%8.8X%8.8X, using 32", acpi_gbl_FADT.dsdt, ACPI_FORMAT_UINT64(acpi_gbl_FADT.Xdsdt))); acpi_gbl_FADT.Xdsdt = (u64)acpi_gbl_FADT.dsdt; } /* If Hardware Reduced flag is set, we are all done */ if (acpi_gbl_reduced_hardware) { return; } /* Examine all of the 64-bit extended address fields (X fields) */ for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { /* * Generate pointer to the 64-bit address, get the register * length (width) and the register name */ address64 = ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, fadt_info_table[i].address64); length = *ACPI_ADD_PTR(u8, &acpi_gbl_FADT, fadt_info_table[i].length); name = fadt_info_table[i].name; /* * For each extended field, check for length mismatch between the * legacy length field and the corresponding 64-bit X length field. * Note: If the legacy length field is > 0xFF bits, ignore this * check. (GPE registers can be larger than the 64-bit GAS structure * can accomodate, 0xFF bits). */ if (address64->address && (ACPI_MUL_8(length) <= ACPI_UINT8_MAX) &&


context:
space:
mode: