arch/all-pc/acpica/source/components/tables/tbprint.c

   1 /******************************************************************************
   2  *
   3  * Module Name: tbprint - Table output utilities
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, 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 #define __TBPRINT_C__
  45
  46 #include "acpi.h"
  47 #include "accommon.h"
  48 #include "actables.h"
  49
  50 #define _COMPONENT          ACPI_TABLES
  51         ACPI_MODULE_NAME    ("tbprint")
  52
  53
  54 /* Local prototypes */
  55
  56 static void
  57 AcpiTbFixString (
  58     char                    *String,
  59     ACPI_SIZE               Length);
  60
  61 static void
  62 AcpiTbCleanupTableHeader (
  63     ACPI_TABLE_HEADER       *OutHeader,
  64     ACPI_TABLE_HEADER       *Header);
  65
  66
  67 /*******************************************************************************
  68  *
  69  * FUNCTION:    AcpiTbFixString
  70  *
  71  * PARAMETERS:  String              - String to be repaired
  72  *              Length              - Maximum length
  73  *
  74  * RETURN:      None
  75  *
  76  * DESCRIPTION: Replace every non-printable or non-ascii byte in the string
  77  *              with a question mark '?'.
  78  *
  79  ******************************************************************************/
  80
  81 static void
  82 AcpiTbFixString (
  83     char                    *String,
  84     ACPI_SIZE               Length)
  85 {
  86
  87     while (Length && *String)
  88     {
  89         if (!ACPI_IS_PRINT (*String))
  90         {
  91             *String = '?';
  92         }
  93         String++;
  94         Length--;
  95     }
  96 }
  97
  98
  99 /*******************************************************************************
 100  *
 101  * FUNCTION:    AcpiTbCleanupTableHeader
 102  *
 103  * PARAMETERS:  OutHeader           - Where the cleaned header is returned
 104  *              Header              - Input ACPI table header
 105  *
 106  * RETURN:      Returns the cleaned header in OutHeader
 107  *
 108  * DESCRIPTION: Copy the table header and ensure that all "string" fields in
 109  *              the header consist of printable characters.
 110  *
 111  ******************************************************************************/
 112
 113 static void
 114 AcpiTbCleanupTableHeader (
 115     ACPI_TABLE_HEADER       *OutHeader,
 116     ACPI_TABLE_HEADER       *Header)
 117 {
 118
 119     ACPI_MEMCPY (OutHeader, Header, sizeof (ACPI_TABLE_HEADER));
 120
 121     AcpiTbFixString (OutHeader->Signature, ACPI_NAME_SIZE);
 122     AcpiTbFixString (OutHeader->OemId, ACPI_OEM_ID_SIZE);
 123     AcpiTbFixString (OutHeader->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
 124     AcpiTbFixString (OutHeader->AslCompilerId, ACPI_NAME_SIZE);
 125 }
 126
 127
 128 /*******************************************************************************
 129  *
 130  * FUNCTION:    AcpiTbPrintTableHeader
 131  *
 132  * PARAMETERS:  Address             - Table physical address
 133  *              Header              - Table header
 134  *
 135  * RETURN:      None
 136  *
 137  * DESCRIPTION: Print an ACPI table header. Special cases for FACS and RSDP.
 138  *
 139  ******************************************************************************/
 140
 141 void
 142 AcpiTbPrintTableHeader (
 143     ACPI_PHYSICAL_ADDRESS   Address,
 144     ACPI_TABLE_HEADER       *Header)
 145 {
 146     ACPI_TABLE_HEADER       LocalHeader;
 147
 148
 149     /*
 150      * The reason that the Address is cast to a void pointer is so that we
 151      * can use %p which will work properly on both 32-bit and 64-bit hosts.
 152      */
 153     if (ACPI_COMPARE_NAME (Header->Signature, ACPI_SIG_FACS))
 154     {
 155         /* FACS only has signature and length fields */
 156
 157         ACPI_INFO ((AE_INFO, "%4.4s %p %06X",
 158             Header->Signature, ACPI_CAST_PTR (void, Address),
 159             Header->Length));
 160     }
 161     else if (ACPI_VALIDATE_RSDP_SIG (Header->Signature))
 162     {
 163         /* RSDP has no common fields */
 164
 165         ACPI_MEMCPY (LocalHeader.OemId,
 166             ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->OemId, ACPI_OEM_ID_SIZE);
 167         AcpiTbFixString (LocalHeader.OemId, ACPI_OEM_ID_SIZE);
 168
 169         ACPI_INFO ((AE_INFO, "RSDP %p %06X (v%.2d %6.6s)",
 170             ACPI_CAST_PTR (void, Address),
 171             (ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision > 0) ?
 172                 ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Length : 20,
 173             ACPI_CAST_PTR (ACPI_TABLE_RSDP, Header)->Revision,
 174             LocalHeader.OemId));
 175     }
 176     else
 177     {
 178         /* Standard ACPI table with full common header */
 179
 180         AcpiTbCleanupTableHeader (&LocalHeader, Header);
 181
 182         ACPI_INFO ((AE_INFO,
 183             "%4.4s %p %06X (v%.2d %6.6s %8.8s %08X %4.4s %08X)",
 184             LocalHeader.Signature, ACPI_CAST_PTR (void, Address),
 185             LocalHeader.Length, LocalHeader.Revision, LocalHeader.OemId,
 186             LocalHeader.OemTableId, LocalHeader.OemRevision,
 187             LocalHeader.AslCompilerId, LocalHeader.AslCompilerRevision));
 188     }
 189 }
 190
 191
 192 /*******************************************************************************
 193  *
 194  * FUNCTION:    AcpiTbValidateChecksum
 195  *
 196  * PARAMETERS:  Table               - ACPI table to verify
 197  *              Length              - Length of entire table
 198  *
 199  * RETURN:      Status
 200  *
 201  * DESCRIPTION: Verifies that the table checksums to zero. Optionally returns
 202  *              exception on bad checksum.
 203  *
 204  ******************************************************************************/
 205
 206 ACPI_STATUS
 207 AcpiTbVerifyChecksum (
 208     ACPI_TABLE_HEADER       *Table,
 209     UINT32                  Length)
 210 {
 211     UINT8                   Checksum;
 212
 213
 214     /*
 215      * FACS/S3PT:
 216      * They are the odd tables, have no standard ACPI header and no checksum
 217      */
 218
 219     if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_S3PT) ||
 220         ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_FACS))
 221     {
 222         return (AE_OK);
 223     }
 224
 225     /* Compute the checksum on the table */
 226
 227     Checksum = AcpiTbChecksum (ACPI_CAST_PTR (UINT8, Table), Length);
 228
 229     /* Checksum ok? (should be zero) */
 230
 231     if (Checksum)
 232     {
 233         ACPI_BIOS_WARNING ((AE_INFO,
 234             "Incorrect checksum in table [%4.4s] - 0x%2.2X, "
 235             "should be 0x%2.2X",
 236             Table->Signature, Table->Checksum,
 237             (UINT8) (Table->Checksum - Checksum)));
 238
 239 #if (ACPI_CHECKSUM_ABORT)
 240         return (AE_BAD_CHECKSUM);
 241 #endif
 242     }
 243
 244     return (AE_OK);
 245 }
 246
 247
 248 /*******************************************************************************
 249  *
 250  * FUNCTION:    AcpiTbChecksum
 251  *
 252  * PARAMETERS:  Buffer          - Pointer to memory region to be checked
 253  *              Length          - Length of this memory region
 254  *
 255  * RETURN:      Checksum (UINT8)
 256  *
 257  * DESCRIPTION: Calculates circular checksum of memory region.
 258  *
 259  ******************************************************************************/
 260
 261 UINT8
 262 AcpiTbChecksum (
 263     UINT8                   *Buffer,
 264     UINT32                  Length)
 265 {
 266     UINT8                   Sum = 0;
 267     UINT8                   *End = Buffer + Length;
 268
 269
 270     while (Buffer < End)
 271     {
 272         Sum = (UINT8) (Sum + *(Buffer++));
 273     }
 274
 275     return (Sum);
 276 }