drivers/bus/acpi/acpica/tables/tbprint.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbprint - Table output utilities
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2019, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include "acpi.h"
  45 #include "accommon.h"
  46 #include "actables.h"
  47
  48 #define _COMPONENT          ACPI_TABLES
  49         ACPI_MODULE_NAME    ("tbprint")
  50
  51
  52 /* Local prototypes */
  53
  54 static void
  55 AcpiTbFixString (
  56     char                    *String,
  57     ACPI_SIZE               Length);
  58
  59 static void
  60 AcpiTbCleanupTableHeader (
  61     ACPI_TABLE_HEADER       *OutHeader,
  62     ACPI_TABLE_HEADER       *Header);
  63
  64
  65 /*******************************************************************************
  66  *
  67  * FUNCTION:    AcpiTbFixString
  68  *
  69  * PARAMETERS:  String              - String to be repaired
  70  *              Length              - Maximum length
  71  *
  72  * RETURN:      None
  73  *
  74  * DESCRIPTION: Replace every non-printable or non-ascii byte in the string
  75  *              with a question mark '?'.
  76  *
  77  ******************************************************************************/
  78
  79 static void
  80 AcpiTbFixString (
  81     char                    *String,
  82     ACPI_SIZE               Length)
  83 {
  84
  85     while (Length && *String)
  86     {
  87         if (!isprint ((int) *String))
  88         {
  89             *String = '?';
  90         }
  91
  92         String++;
  93         Length--;
  94     }
  95 }
  96
  97
  98 /*******************************************************************************
  99  *
 100  * FUNCTION:    AcpiTbCleanupTableHeader
 101  *
 102  * PARAMETERS:  OutHeader           - Where the cleaned header is returned
 103  *              Header              - Input ACPI table header
 104  *
 105  * RETURN:      Returns the cleaned header in OutHeader
 106  *
 107  * DESCRIPTION: Copy the table header and ensure that all "string" fields in
 108  *              the header consist of printable characters.
 109  *
 110  ******************************************************************************/
 111
 112 static void
 113 AcpiTbCleanupTableHeader (
 114     ACPI_TABLE_HEADER       *OutHeader,
 115     ACPI_TABLE_HEADER       *Header)
 116 {
 117
 118     memcpy (OutHeader, Header, sizeof (ACPI_TABLE_HEADER));
 119
 120     AcpiTbFixString (OutHeader->Signature, ACPI_NAMESEG_SIZE);
 121     AcpiTbFixString (OutHeader->OemId, ACPI_OEM_ID_SIZE);
 122     AcpiTbFixString (OutHeader->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
 123     AcpiTbFixString (OutHeader->AslCompilerId, ACPI_NAMESEG_SIZE);
 124 }
 125
 126
 127 /*******************************************************************************
 128  *
 129  * FUNCTION:    AcpiTbPrintTableHeader
 130  *
 131  * PARAMETERS:  Address             - Table physical address
 132  *              Header              - Table header
 133  *
 134  * RETURN:      None
 135  *
 136  * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP.
 137  *
 138  ******************************************************************************/
 139
 140 void
 141 AcpiTbPrintTableHeader (
 142     ACPI_PHYSICAL_ADDRESS   Address,
 143     ACPI_TABLE_HEADER       *Header)
 144 {
 145     ACPI_TABLE_HEADER       LocalHeader;
 146
 147
 148     if (ACPI_COMPARE_NAMESEG (Header->Signature, ACPI_SIG_FACS))
 149     {
 150         /* FACS only has signature and length fields */
 151
 152         ACPI_INFO (("%-4.4s 0x%8.8X%8.8X %06X",
 153             Header->Signature, ACPI_FORMAT_UINT64 (Address),
 154             Header->Length));
 155     }
 156     else if (ACPI_VALIDATE_RSDP_SIG (Header->Signature))
 157     {
 158         /* RSDP has no common fields */
 159
 160         memcpy (LocalHeader.OemId, ACPI_CAST_PTR (ACPI_TABLE_RSDP,
 161             Header)->OemId, ACPI_OEM_ID_SIZE);
 162         AcpiTbFixString (LocalHeader.OemId, ACPI_OEM_ID_SIZE);
 163
 164         ACPI_INFO (("RSDP 0x%8.8X%8.8X %06X (v%.2d %-6.6s)",
 165             ACPI_FORMAT_UINT64 (Address),
 166             (ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision > 0) ?
 167                 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Length : 20,
 168             ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision,
 169             LocalHeader.OemId));
 170     }
 171     else
 172     {
 173         /* Standard ACPI table with full common header */
 174
 175         AcpiTbCleanupTableHeader (&LocalHeader, Header);
 176
 177         ACPI_INFO ((
 178             "%-4.4s 0x%8.8X%8.8X"
 179             " %06X (v%.2d %-6.6s %-8.8s %08X %-4.4s %08X)",
 180             LocalHeader.Signature, ACPI_FORMAT_UINT64 (Address),
 181             LocalHeader.Length, LocalHeader.Revision, LocalHeader.OemId,
 182             LocalHeader.OemTableId, LocalHeader.OemRevision,
 183             LocalHeader.AslCompilerId, LocalHeader.AslCompilerRevision));
 184     }
 185 }
 186
 187
 188 /*******************************************************************************
 189  *
 190  * FUNCTION:    AcpiTbValidateChecksum
 191  *
 192  * PARAMETERS:  Table               - ACPI table to verify
 193  *              Length              - Length of entire table
 194  *
 195  * RETURN:      Status
 196  *
 197  * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
 198  *              exception on bad checksum.
 199  *
 200  ******************************************************************************/
 201
 202 ACPI_STATUS
 203 AcpiTbVerifyChecksum (
 204     ACPI_TABLE_HEADER       *Table,
 205     UINT32                  Length)
 206 {
 207     UINT8                   Checksum;
 208
 209
 210     /*
 211      * FACS/S3PT:
 212      * They are the odd tables, have no standard ACPI header and no checksum
 213      */
 214
 215     if (ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_S3PT) ||
 216         ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_FACS))
 217     {
 218         return (AE_OK);
 219     }
 220
 221     /* Compute the checksum on the table */
 222
 223     Checksum = AcpiTbChecksum (ACPI_CAST_PTR (UINT8, Table), Length);
 224
 225     /* Checksum ok? (should be zero) */
 226
 227     if (Checksum)
 228     {
 229         ACPI_BIOS_WARNING ((AE_INFO,
 230             "Incorrect checksum in table [%4.4s] - 0x%2.2X, "
 231             "should be 0x%2.2X",
 232             Table->Signature, Table->Checksum,
 233             (UINT8) (Table->Checksum - Checksum)));
 234
 235 #if (ACPI_CHECKSUM_ABORT)
 236         return (AE_BAD_CHECKSUM);
 237 #endif
 238     }
 239
 240     return (AE_OK);
 241 }
 242
 243
 244 /*******************************************************************************
 245  *
 246  * FUNCTION:    AcpiTbChecksum
 247  *
 248  * PARAMETERS:  Buffer          - Pointer to memory region to be checked
 249  *              Length          - Length of this memory region
 250  *
 251  * RETURN:      Checksum (UINT8)
 252  *
 253  * DESCRIPTION: Calculates circular checksum of memory region.
 254  *
 255  ******************************************************************************/
 256
 257 UINT8
 258 AcpiTbChecksum (
 259     UINT8                   *Buffer,
 260     UINT32                  Length)
 261 {
 262     UINT8                   Sum = 0;
 263     UINT8                   *End = Buffer + Length;
 264
 265
 266     while (Buffer < End)
 267     {
 268         Sum = (UINT8) (Sum + *(Buffer++));
 269     }
 270
 271     return (Sum);
 272 }