EDK2/efiffs/org/src/logging.c

   1 /* logging.c - EFI logging */
   2 /*
   3  *  Copyright © 2014-2017 Pete Batard <pete@akeo.ie>
   4  *
   5  *  This program is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "driver.h"
  20
  21 /* Not defined in gnu-efi yet */
  22 #define SHELL_VARIABLE_GUID { \
  23         0x158def5a, 0xf656, 0x419c, { 0xb0, 0x27, 0x7a, 0x31, 0x92, 0xc0, 0x79, 0xd2 } \
  24 }
  25 extern EFI_GUID gShellVariableGuid;
  26 EFI_GUID ShellVariable = SHELL_VARIABLE_GUID;
  27
  28 static UINTN PrintNone(IN CONST CHAR16 *fmt, ... ) { return 0; }
  29 Print_t PrintError = PrintNone;
  30 Print_t PrintWarning = PrintNone;
  31 Print_t PrintInfo = PrintNone;
  32 Print_t PrintDebug = PrintNone;
  33 Print_t PrintExtra = PrintNone;
  34 Print_t* PrintTable[] = { &PrintError, &PrintWarning, &PrintInfo,
  35                 &PrintDebug, &PrintExtra };
  36
  37 /* Global driver verbosity level */
  38 #if !defined(DEFAULT_LOGLEVEL)
  39 #define DEFAULT_LOGLEVEL FS_LOGLEVEL_NONE
  40 #endif
  41 UINTN LogLevel = DEFAULT_LOGLEVEL;
  42
  43 /**
  44  * Print status
  45  *
  46  * @v Status            EFI status code
  47  */
  48 VOID
  49 PrintStatus(EFI_STATUS Status)
  50 {
  51 #if defined(__MAKEWITH_GNUEFI)
  52         CHAR16 StatusString[64];
  53         StatusToString(StatusString, Status);
  54         // Make sure the Status is unsigned 32 bits
  55         Print(L": [%d] %s\n", (Status & 0x7FFFFFFF), StatusString);
  56 #else
  57         Print(L": [%d]\n", (Status & 0x7FFFFFFF));
  58 #endif
  59 }
  60
  61 /*
  62  * You can control the verbosity of the driver output by setting the shell environment
  63  * variable FS_LOGGING to one of the values defined in the FS_LOGLEVEL constants
  64  */
  65 VOID
  66 SetLogging(VOID)
  67 {
  68         EFI_STATUS Status;
  69         CHAR16 LogVar[4];
  70         UINTN i, LogVarSize = sizeof(LogVar);
  71
  72         Status = RT->GetVariable(L"FS_LOGGING", &ShellVariable, NULL, &LogVarSize, LogVar);
  73         if (Status == EFI_SUCCESS)
  74                 LogLevel = Atoi(LogVar);
  75
  76         for (i=0; i<ARRAYSIZE(PrintTable); i++)
  77                 *PrintTable[i] = (i < LogLevel)?(Print_t)Print:(Print_t)PrintNone;
  78
  79         PrintExtra(L"LogLevel = %d\n", LogLevel);
  80 }