Omap35xxPkg/Library/GdbSerialLib/GdbSerialLib.c

   1 /** @file
   2   Basic serial IO abstaction for GDB
   3
   4   Copyright (c) 2008-2009, Apple Inc. All rights reserved.
   5
   6   All rights reserved. This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <Uefi.h>
  17 #include <Library/GdbSerialLib.h>
  18 #include <Library/PcdLib.h>
  19 #include <Library/IoLib.h>
  20 #include <Library/DebugLib.h>
  21 #include <Library/OmapLib.h>
  22 #include <Omap3530/Omap3530.h>
  23
  24 RETURN_STATUS
  25 EFIAPI
  26 GdbSerialLibConstructor (
  27   VOID
  28   )
  29 {
  30   return RETURN_SUCCESS;
  31 }
  32
  33 RETURN_STATUS
  34 EFIAPI
  35 GdbSerialInit (
  36   IN UINT64     BaudRate,
  37   IN UINT8      Parity,
  38   IN UINT8      DataBits,
  39   IN UINT8      StopBits
  40   )
  41 {
  42   return RETURN_SUCCESS;
  43 }
  44
  45 BOOLEAN
  46 EFIAPI
  47 GdbIsCharAvailable (
  48   VOID
  49   )
  50 {
  51   UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  52
  53   if ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_NOT_EMPTY) {
  54     return TRUE;
  55   } else {
  56     return FALSE;
  57   }
  58 }
  59
  60 CHAR8
  61 EFIAPI
  62 GdbGetChar (
  63   VOID
  64   )
  65 {
  66   UINT32  LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  67   UINT32  RBR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_RBR_REG;
  68   CHAR8   Char;
  69
  70   while ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_EMPTY);
  71   Char = MmioRead8(RBR);
  72
  73   return Char;
  74 }
  75
  76 VOID
  77 EFIAPI
  78 GdbPutChar (
  79   IN  CHAR8   Char
  80   )
  81 {
  82   UINT32  LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  83   UINT32  THR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_THR_REG;
  84
  85   while ((MmioRead8(LSR) & UART_LSR_TX_FIFO_E_MASK) == UART_LSR_TX_FIFO_E_NOT_EMPTY);
  86   MmioWrite8(THR, Char);
  87 }
  88
  89 VOID
  90 GdbPutString (
  91   IN CHAR8  *String
  92   )
  93 {
  94   while (*String != '\0') {
  95     GdbPutChar (*String);
  96     String++;
  97   }
  98 }
  99
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