252 lines
8.0 KiB
C
252 lines
8.0 KiB
C
/******************************************************************************
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*
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* Module Name: tbprint - Table output utilities
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "actables.h"
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#define _COMPONENT ACPI_TABLES
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ACPI_MODULE_NAME("tbprint")
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/* Local prototypes */
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static void acpi_tb_fix_string(char *string, acpi_size length);
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static void
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acpi_tb_cleanup_table_header(struct acpi_table_header *out_header,
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struct acpi_table_header *header);
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_fix_string
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*
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* PARAMETERS: string - String to be repaired
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* length - Maximum length
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*
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* RETURN: None
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*
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* DESCRIPTION: Replace every non-printable or non-ascii byte in the string
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* with a question mark '?'.
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*
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******************************************************************************/
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static void acpi_tb_fix_string(char *string, acpi_size length)
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{
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while (length && *string) {
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if (!ACPI_IS_PRINT(*string)) {
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*string = '?';
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}
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string++;
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length--;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_cleanup_table_header
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*
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* PARAMETERS: out_header - Where the cleaned header is returned
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* header - Input ACPI table header
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*
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* RETURN: Returns the cleaned header in out_header
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*
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* DESCRIPTION: Copy the table header and ensure that all "string" fields in
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* the header consist of printable characters.
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*
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******************************************************************************/
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static void
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acpi_tb_cleanup_table_header(struct acpi_table_header *out_header,
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struct acpi_table_header *header)
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{
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ACPI_MEMCPY(out_header, header, sizeof(struct acpi_table_header));
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acpi_tb_fix_string(out_header->signature, ACPI_NAME_SIZE);
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acpi_tb_fix_string(out_header->oem_id, ACPI_OEM_ID_SIZE);
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acpi_tb_fix_string(out_header->oem_table_id, ACPI_OEM_TABLE_ID_SIZE);
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acpi_tb_fix_string(out_header->asl_compiler_id, ACPI_NAME_SIZE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_print_table_header
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*
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* PARAMETERS: address - Table physical address
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* header - Table header
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*
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* RETURN: None
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*
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* DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP.
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*
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******************************************************************************/
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void
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acpi_tb_print_table_header(acpi_physical_address address,
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struct acpi_table_header *header)
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{
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struct acpi_table_header local_header;
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/*
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* The reason that we use ACPI_PRINTF_UINT and ACPI_FORMAT_TO_UINT is to
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* support both 32-bit and 64-bit hosts/addresses in a consistent manner.
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* The %p specifier does not emit uniform output on all hosts. On some,
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* leading zeros are not supported.
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*/
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if (ACPI_COMPARE_NAME(header->signature, ACPI_SIG_FACS)) {
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/* FACS only has signature and length fields */
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ACPI_INFO((AE_INFO, "%-4.4s " ACPI_PRINTF_UINT " %06X",
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header->signature, ACPI_FORMAT_TO_UINT(address),
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header->length));
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} else if (ACPI_VALIDATE_RSDP_SIG(header->signature)) {
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/* RSDP has no common fields */
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ACPI_MEMCPY(local_header.oem_id,
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ACPI_CAST_PTR(struct acpi_table_rsdp,
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header)->oem_id, ACPI_OEM_ID_SIZE);
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acpi_tb_fix_string(local_header.oem_id, ACPI_OEM_ID_SIZE);
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ACPI_INFO((AE_INFO,
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"RSDP " ACPI_PRINTF_UINT " %06X (v%.2d %-6.6s)",
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ACPI_FORMAT_TO_UINT(address),
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(ACPI_CAST_PTR(struct acpi_table_rsdp, header)->
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revision >
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0) ? ACPI_CAST_PTR(struct acpi_table_rsdp,
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header)->length : 20,
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ACPI_CAST_PTR(struct acpi_table_rsdp,
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header)->revision,
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local_header.oem_id));
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} else {
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/* Standard ACPI table with full common header */
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acpi_tb_cleanup_table_header(&local_header, header);
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ACPI_INFO((AE_INFO,
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"%-4.4s " ACPI_PRINTF_UINT
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" %06X (v%.2d %-6.6s %-8.8s %08X %-4.4s %08X)",
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local_header.signature, ACPI_FORMAT_TO_UINT(address),
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local_header.length, local_header.revision,
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local_header.oem_id, local_header.oem_table_id,
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local_header.oem_revision,
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local_header.asl_compiler_id,
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local_header.asl_compiler_revision));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_validate_checksum
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*
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* PARAMETERS: table - ACPI table to verify
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* length - Length of entire table
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*
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* RETURN: Status
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*
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* DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
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* exception on bad checksum.
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*
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******************************************************************************/
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acpi_status acpi_tb_verify_checksum(struct acpi_table_header *table, u32 length)
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{
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u8 checksum;
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/*
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* FACS/S3PT:
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* They are the odd tables, have no standard ACPI header and no checksum
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*/
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if (ACPI_COMPARE_NAME(table->signature, ACPI_SIG_S3PT) ||
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ACPI_COMPARE_NAME(table->signature, ACPI_SIG_FACS)) {
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return (AE_OK);
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}
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/* Compute the checksum on the table */
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checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, table), length);
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/* Checksum ok? (should be zero) */
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if (checksum) {
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ACPI_BIOS_WARNING((AE_INFO,
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"Incorrect checksum in table [%4.4s] - 0x%2.2X, "
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"should be 0x%2.2X",
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table->signature, table->checksum,
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(u8)(table->checksum - checksum)));
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#if (ACPI_CHECKSUM_ABORT)
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return (AE_BAD_CHECKSUM);
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#endif
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_tb_checksum
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*
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* PARAMETERS: buffer - Pointer to memory region to be checked
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* length - Length of this memory region
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*
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* RETURN: Checksum (u8)
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*
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* DESCRIPTION: Calculates circular checksum of memory region.
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*
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******************************************************************************/
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u8 acpi_tb_checksum(u8 *buffer, u32 length)
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{
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u8 sum = 0;
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u8 *end = buffer + length;
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while (buffer < end) {
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sum = (u8)(sum + *(buffer++));
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}
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return (sum);
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}
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