diff options
Diffstat (limited to 'drivers/acpi/acpica/tbprint.c')
| -rw-r--r-- | drivers/acpi/acpica/tbprint.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/tbprint.c b/drivers/acpi/acpica/tbprint.c new file mode 100644 index 000000000000..dc963f823d2c --- /dev/null +++ b/drivers/acpi/acpica/tbprint.c @@ -0,0 +1,237 @@ +/****************************************************************************** + * + * Module Name: tbprint - Table output 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("tbprint") + +/* Local prototypes */ +static void acpi_tb_fix_string(char *string, acpi_size length); + +static void +acpi_tb_cleanup_table_header(struct acpi_table_header *out_header, + struct acpi_table_header *header); + +/******************************************************************************* + * + * FUNCTION: acpi_tb_fix_string + * + * PARAMETERS: string - String to be repaired + * length - Maximum length + * + * RETURN: None + * + * DESCRIPTION: Replace every non-printable or non-ascii byte in the string + * with a question mark '?'. + * + ******************************************************************************/ + +static void acpi_tb_fix_string(char *string, acpi_size length) +{ + + while (length && *string) { + if (!ACPI_IS_PRINT(*string)) { + *string = '?'; + } + string++; + length--; + } +} + +/******************************************************************************* + * + * FUNCTION: acpi_tb_cleanup_table_header + * + * PARAMETERS: out_header - Where the cleaned header is returned + * header - Input ACPI table header + * + * RETURN: Returns the cleaned header in out_header + * + * DESCRIPTION: Copy the table header and ensure that all "string" fields in + * the header consist of printable characters. + * + ******************************************************************************/ + +static void +acpi_tb_cleanup_table_header(struct acpi_table_header *out_header, + struct acpi_table_header *header) +{ + + ACPI_MEMCPY(out_header, header, sizeof(struct acpi_table_header)); + + acpi_tb_fix_string(out_header->signature, ACPI_NAME_SIZE); + acpi_tb_fix_string(out_header->oem_id, ACPI_OEM_ID_SIZE); + acpi_tb_fix_string(out_header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE); + acpi_tb_fix_string(out_header->asl_compiler_id, ACPI_NAME_SIZE); +} + +/******************************************************************************* + * + * 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) +{ + struct acpi_table_header local_header; + + /* + * The reason that the Address is cast to a void pointer is so that we + * can use %p which will work properly on both 32-bit and 64-bit hosts. + */ + if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) { + + /* FACS only has signature and length fields */ + + ACPI_INFO((AE_INFO, "%4.4s %p %05X", + 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_MEMCPY(local_header.oem_id, + ACPI_CAST_PTR(struct acpi_table_rsdp, + header)->oem_id, ACPI_OEM_ID_SIZE); + acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE); + + ACPI_INFO((AE_INFO, "RSDP %p %05X (v%.2d %6.6s)", + ACPI_CAST_PTR(void, address), + (ACPI_CAST_PTR(struct acpi_table_rsdp, header)-> + revision > + 0) ? ACPI_CAST_PTR(struct acpi_table_rsdp, + header)->length : 20, + ACPI_CAST_PTR(struct acpi_table_rsdp, + header)->revision, + local_header.oem_id)); + } else { + /* Standard ACPI table with full common header */ + + acpi_tb_cleanup_table_header(&local_header, header); + + ACPI_INFO((AE_INFO, + "%4.4s %p %05X (v%.2d %6.6s %8.8s %08X %4.4s %08X)", + local_header.signature, ACPI_CAST_PTR(void, address), + local_header.length, local_header.revision, + local_header.oem_id, local_header.oem_table_id, + local_header.oem_revision, + local_header.asl_compiler_id, + local_header.asl_compiler_revision)); + } +} + +/******************************************************************************* + * + * 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_BIOS_WARNING((AE_INFO, + "Incorrect checksum in table [%4.4s] - 0x%2.2X, " + "should be 0x%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, u32 length) +{ + u8 sum = 0; + u8 *end = buffer + length; + + while (buffer < end) { + sum = (u8)(sum + *(buffer++)); + } + + return (sum); +} |