BeagleBoardPkg/Library/GdbSerialLib/GdbSerialLib.c

   1 /** @file
   2   Basic serial IO abstaction for GDB
   3
   4   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   5
   6   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   IN EFI_HANDLE        ImageHandle,
  28   IN EFI_SYSTEM_TABLE  *SystemTable
  29   )
  30 {
  31   return RETURN_SUCCESS;
  32 }
  33
  34 RETURN_STATUS
  35 EFIAPI
  36 GdbSerialInit (
  37   IN UINT64     BaudRate,
  38   IN UINT8      Parity,
  39   IN UINT8      DataBits,
  40   IN UINT8      StopBits
  41   )
  42 {
  43   return RETURN_SUCCESS;
  44 }
  45
  46 BOOLEAN
  47 EFIAPI
  48 GdbIsCharAvailable (
  49   VOID
  50   )
  51 {
  52   UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  53
  54   if ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_NOT_EMPTY) {
  55     return TRUE;
  56   } else {
  57     return FALSE;
  58   }
  59 }
  60
  61 CHAR8
  62 EFIAPI
  63 GdbGetChar (
  64   VOID
  65   )
  66 {
  67   UINT32  LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  68   UINT32  RBR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_RBR_REG;
  69   CHAR8   Char;
  70
  71   while ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_EMPTY);
  72   Char = MmioRead8(RBR);
  73
  74   return Char;
  75 }
  76
  77 VOID
  78 EFIAPI
  79 GdbPutChar (
  80   IN  CHAR8   Char
  81   )
  82 {
  83   UINT32  LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  84   UINT32  THR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_THR_REG;
  85
  86   while ((MmioRead8(LSR) & UART_LSR_TX_FIFO_E_MASK) == UART_LSR_TX_FIFO_E_NOT_EMPTY);
  87   MmioWrite8(THR, Char);
  88 }
  89
  90 VOID
  91 GdbPutString (
  92   IN CHAR8  *String
  93   )
  94 {
  95   while (*String != '\0') {
  96     GdbPutChar (*String);
  97     String++;
  98   }
  99 }
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