DuetPkg/EfiLdr/Debug.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13   Debug.c
  14
  15 Abstract:
  16
  17 Revision History:
  18
  19 --*/
  20 #include "EfiLdr.h"
  21 #include "Debug.h"
  22
  23 UINT8 *mCursor;
  24 UINT8 mHeaderIndex = 10;
  25
  26 VOID
  27 PrintHeader (
  28   CHAR8 Char
  29   )
  30 {
  31   *(UINT8 *)(UINTN)(0x000b8000 + mHeaderIndex) = Char;
  32   mHeaderIndex += 2;
  33 }
  34
  35 VOID
  36 ClearScreen (
  37   VOID
  38   )
  39 {
  40   UINT32 Index;
  41
  42   mCursor = (UINT8 *)(UINTN)(0x000b8000 + 160);
  43   for (Index = 0; Index < 80 * 49; Index++) {
  44     *mCursor = ' ';
  45     mCursor += 2;
  46   }
  47   mCursor = (UINT8 *)(UINTN)(0x000b8000 + 160);
  48 }
  49
  50 VOID
  51 PrintValue64 (
  52   UINT64 Value
  53   )
  54 {
  55   PrintValue ((UINT32) RShiftU64 (Value, 32));
  56   PrintValue ((UINT32) Value);
  57 }
  58
  59 VOID
  60 PrintValue (
  61   UINT32 Value
  62   )
  63 {
  64   UINT32 Index;
  65   UINT8  Char;
  66
  67   for (Index = 0; Index < 8; Index++) {
  68     Char = (UINT8)(((Value >> ((7 - Index) * 4)) & 0x0f) + '0');
  69     if (Char > '9') {
  70       Char = (UINT8) (Char - '0' - 10 + 'A');
  71     }
  72     *mCursor = Char;
  73     mCursor += 2;
  74   }
  75 }
  76
  77 VOID
  78 PrintString (
  79   CHAR8 *String
  80   )
  81 {
  82   UINT32 Index;
  83
  84   for (Index = 0; String[Index] != 0; Index++) {
  85     if (String[Index] == '\n') {
  86       mCursor = (UINT8 *)(UINTN)(0xb8000 + (((((UINTN)mCursor - 0xb8000) + 160) / 160) * 160));
  87     } else {
  88       *mCursor = String[Index];
  89       mCursor += 2;
  90     }
  91   }
  92 }
  93