/****************************************************************************** * * Module Name: tbutils - 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 #include #define _COMPONENT ACPI_TABLES ACPI_MODULE_NAME("tbutils") /* Local prototypes */ static void acpi_tb_parse_fadt(acpi_native_uint table_index, u8 flags); static void acpi_tb_convert_fadt(void); static void acpi_tb_install_table(acpi_physical_address address, u8 flags, char *signature, acpi_native_uint table_index); static void inline acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, u8 bit_width, u64 address); /* 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_print_table_header * * PARAMETERS: Address - Table physical address * Header - Table header * * RETURN: None * * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP. * ******************************************************************************/ void acpi_tb_print_table_header(acpi_physical_address address, struct acpi_table_header *header) { if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { /* FACS only has signature and length fields of common table header */ ACPI_INFO((AE_INFO, "%4.4s @ 0x%p/0x%04X", header->signature, ACPI_CAST_PTR(void, address), header->length)); } else if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_RSDP)) { /* RSDP has no common fields */ ACPI_INFO((AE_INFO, "RSDP @ 0x%p/0x%04X (v%3.3d %6.6s)", ACPI_CAST_PTR(void, address), (((struct acpi_table_rsdp *)header)->revision > 0) ? ((struct acpi_table_rsdp *)header)->length : 20, ((struct acpi_table_rsdp *)header)->revision, ((struct acpi_table_rsdp *)header)->oem_id)); } else { /* Standard ACPI table with full common header */ ACPI_INFO((AE_INFO, "%4.4s @ 0x%p/0x%04X (v%3.3d %6.6s %8.8s 0x%08X %4.4s 0x%08X)", header->signature, ACPI_CAST_PTR(void, address), header->length, header->revision, header->oem_id, header->oem_table_id, header->oem_revision, header->asl_compiler_id, header->asl_compiler_revision)); } } /******************************************************************************* * * 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_validate_checksum * * PARAMETERS: Table - ACPI table to verify * Length - Length of entire table * * RETURN: Status * * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns * exception on bad checksum. * ******************************************************************************/ acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length) { u8 checksum; /* Compute the checksum on the table */ checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length); /* Checksum ok? (should be zero) */ if (checksum) { ACPI_WARNING((AE_INFO, "Incorrect checksum in table [%4.4s] - %2.2X, should be %2.2X", table->signature, table->checksum, (u8) (table->checksum - checksum))); #if (ACPI_CHECKSUM_ABORT) return (AE_BAD_CHECKSUM); #endif } return (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_tb_checksum * * PARAMETERS: Buffer - Pointer to memory region to be checked * Length - Length of this memory region * * RETURN: Checksum (u8) * * DESCRIPTION: Calculates circular checksum of memory region. * ******************************************************************************/ u8 acpi_tb_checksum(u8 * buffer, acpi_native_uint length) { u8 sum = 0; u8 *end = buffer + length; while (buffer < end) { sum = (u8) (sum + *(buffer++)); } return sum; } /******************************************************************************* * * 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 V1.0 addresses to the "X" generic address structs, * 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), *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_install_table * * PARAMETERS: Address - Physical address of DSDT or FACS * Flags - Flags * Signature - Table signature, NULL if no need to * match * table_index - Index into root table array * * RETURN: None * * DESCRIPTION: Install an ACPI table into the global data structure. * ******************************************************************************/ static void acpi_tb_install_table(acpi_physical_address address, u8 flags, char *signature, acpi_native_uint table_index) { struct acpi_table_header *table; if (!address) { ACPI_ERROR((AE_INFO, "Null physical address for ACPI table [%s]", signature)); return; } /* Map just the table header */ table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); if (!table) { return; } /* If a particular signature is expected, signature must match */ if (signature && !ACPI_COMPARE_NAME(table->signature, signature)) { ACPI_ERROR((AE_INFO, "Invalid signature 0x%X for ACPI table [%s]", *ACPI_CAST_PTR(u32, table->signature), signature)); goto unmap_and_exit; } /* Initialize the table entry */ acpi_gbl_root_table_list.tables[table_index].address = address; acpi_gbl_root_table_list.tables[table_index].length = table->length; acpi_gbl_root_table_list.tables[table_index].flags = flags; ACPI_MOVE_32_TO_32(& (acpi_gbl_root_table_list.tables[table_index]. signature), table->signature); acpi_tb_print_table_header(address, table); if (table_index == ACPI_TABLE_INDEX_DSDT) { /* Global integer width is based upon revision of the DSDT */ acpi_ut_set_integer_width(table->revision); } unmap_and_exit: acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); } /******************************************************************************* * * 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) * ******************************************************************************/ static 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, sizeof(struct acpi_table_fadt), 0); 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); } /******************************************************************************* * * FUNCTION: acpi_tb_parse_root_table * * PARAMETERS: Rsdp - Pointer to the RSDP * Flags - Flags * * RETURN: Status * * DESCRIPTION: This function is called to parse the Root System Description * Table (RSDT or XSDT) * * NOTE: Tables are mapped (not copied) for efficiency. The FACS must * be mapped and cannot be copied because it contains the actual * memory location of the ACPI Global Lock. * ******************************************************************************/ acpi_status acpi_tb_parse_root_table(acpi_physical_address rsdp_address, u8 flags) { struct acpi_table_rsdp *rsdp; acpi_native_uint table_entry_size; acpi_native_uint i; u32 table_count; struct acpi_table_header *table; acpi_physical_address address; u32 length; u8 *table_entry; acpi_status status; ACPI_FUNCTION_TRACE(tb_parse_root_table); /* * Map the entire RSDP and extract the address of the RSDT or XSDT */ rsdp = acpi_os_map_memory(rsdp_address, sizeof(struct acpi_table_rsdp)); if (!rsdp) { return_ACPI_STATUS(AE_NO_MEMORY); } acpi_tb_print_table_header(rsdp_address, ACPI_CAST_PTR(struct acpi_table_header, rsdp)); /* Differentiate between RSDT and XSDT root tables */ if (rsdp->revision > 1 && rsdp->xsdt_physical_address) { /* * Root table is an XSDT (64-bit physical addresses). We must use the * XSDT if the revision is > 1 and the XSDT pointer is present, as per * the ACPI specification. */ address = (acpi_physical_address) rsdp->xsdt_physical_address; table_entry_size = sizeof(u64); } else { /* Root table is an RSDT (32-bit physical addresses) */ address = (acpi_physical_address) rsdp->rsdt_physical_address; table_entry_size = sizeof(u32); } /* * It is not possible to map more than one entry in some environments, * so unmap the RSDP here before mapping other tables */ acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); /* Map the RSDT/XSDT table header to get the full table length */ table = acpi_os_map_memory(address, sizeof(struct acpi_table_header)); if (!table) { return_ACPI_STATUS(AE_NO_MEMORY); } acpi_tb_print_table_header(address, table); /* Get the length of the full table, verify length and map entire table */ length = table->length; acpi_os_unmap_memory(table, sizeof(struct acpi_table_header)); if (length < sizeof(struct acpi_table_header)) { ACPI_ERROR((AE_INFO, "Invalid length 0x%X in RSDT/XSDT", length)); return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); } table = acpi_os_map_memory(address, length); if (!table) { return_ACPI_STATUS(AE_NO_MEMORY); } /* Validate the root table checksum */ status = acpi_tb_verify_checksum(table, length); if (ACPI_FAILURE(status)) { acpi_os_unmap_memory(table, length); return_ACPI_STATUS(status); } /* Calculate the number of tables described in the root table */ table_count = (table->length - sizeof(struct acpi_table_header)) / table_entry_size; /* * First two entries in the table array are reserved for the DSDT and FACS, * which are not actually present in the RSDT/XSDT - they come from the FADT */ table_entry = ACPI_CAST_PTR(u8, table) + sizeof(struct acpi_table_header); acpi_gbl_root_table_list.count = 2; /* * Initialize the root table array from the RSDT/XSDT */ for (i = 0; i < table_count; i++) { if (acpi_gbl_root_table_list.count >= acpi_gbl_root_table_list.size) { /* There is no more room in the root table array, attempt resize */ status = acpi_tb_resize_root_table_list(); if (ACPI_FAILURE(status)) { ACPI_WARNING((AE_INFO, "Truncating %u table entries!", (unsigned) (acpi_gbl_root_table_list.size - acpi_gbl_root_table_list. count))); break; } } /* * Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */ if ((table_entry_size == sizeof(u32)) || (sizeof(acpi_physical_address) == sizeof(u32))) { /* * 32-bit platform, RSDT: Move 32-bit to 32-bit * 32-bit platform, XSDT: Truncate 64-bit to 32-bit * 64-bit platform, RSDT: Expand 32-bit to 64-bit * * Note: Addresses are 32-bit aligned in both RSDT and XSDT */ acpi_gbl_root_table_list. tables[acpi_gbl_root_table_list.count].address = (acpi_physical_address) (*ACPI_CAST_PTR (u32, table_entry)); } else { /* * 64-bit platform, XSDT: Move 64-bit to 64-bit * * Note: 64-bit addresses are only 32-bit aligned in the XSDT */ ACPI_MOVE_64_TO_64(&acpi_gbl_root_table_list. tables[acpi_gbl_root_table_list. count].address, table_entry); } table_entry += table_entry_size; acpi_gbl_root_table_list.count++; } /* * It is not possible to map more than one entry in some environments, * so unmap the root table here before mapping other tables */ acpi_os_unmap_memory(table, length); /* * Complete the initialization of the root table array by examining * the header of each table */ for (i = 2; i < acpi_gbl_root_table_list.count; i++) { acpi_tb_install_table(acpi_gbl_root_table_list.tables[i]. address, flags, NULL, i); /* Special case for FADT - get the DSDT and FACS */ if (ACPI_COMPARE_NAME (&acpi_gbl_root_table_list.tables[i].signature, ACPI_SIG_FADT)) { acpi_tb_parse_fadt(i, flags); } } return_ACPI_STATUS(AE_OK); } /****************************************************************************** * * FUNCTION: acpi_tb_map * * PARAMETERS: Address - Address to be mapped * Length - Length to be mapped * Flags - Logical or physical addressing mode * * RETURN: Pointer to mapped region * * DESCRIPTION: Maps memory according to flag * *****************************************************************************/ void *acpi_tb_map(acpi_physical_address address, u32 length, u32 flags) { if (flags == ACPI_TABLE_ORIGIN_MAPPED) { return (acpi_os_map_memory(address, length)); } else { return (ACPI_CAST_PTR(void, address)); } } /****************************************************************************** * * FUNCTION: acpi_tb_unmap * * PARAMETERS: Pointer - To mapped region * Length - Length to be unmapped * Flags - Logical or physical addressing mode * * RETURN: None * * DESCRIPTION: Unmaps memory according to flag * *****************************************************************************/ void acpi_tb_unmap(void *pointer, u32 length, u32 flags) { if (flags == ACPI_TABLE_ORIGIN_MAPPED) { acpi_os_unmap_memory(pointer, length); } }