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.<BR>
   5
   6   SPDX-License-Identifier: BSD-2-Clause-Patent
   7
   8 **/
   9
  10 #include <Uefi.h>
  11 #include <Library/GdbSerialLib.h>
  12 #include <Library/PcdLib.h>
  13 #include <Library/IoLib.h>
  14 #include <Library/DebugLib.h>
  15 #include <Library/OmapLib.h>
  16 #include <Omap3530/Omap3530.h>
  17
  18 RETURN_STATUS
  19 EFIAPI
  20 GdbSerialLibConstructor (
  21   VOID
  22   )
  23 {
  24   return RETURN_SUCCESS;
  25 }
  26
  27 RETURN_STATUS
  28 EFIAPI
  29 GdbSerialInit (
  30   IN UINT64     BaudRate,
  31   IN UINT8      Parity,
  32   IN UINT8      DataBits,
  33   IN UINT8      StopBits
  34   )
  35 {
  36   return RETURN_SUCCESS;
  37 }
  38
  39 BOOLEAN
  40 EFIAPI
  41 GdbIsCharAvailable (
  42   VOID
  43   )
  44 {
  45   UINT32 LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  46
  47   if ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_NOT_EMPTY) {
  48     return TRUE;
  49   } else {
  50     return FALSE;
  51   }
  52 }
  53
  54 CHAR8
  55 EFIAPI
  56 GdbGetChar (
  57   VOID
  58   )
  59 {
  60   UINT32  LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  61   UINT32  RBR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_RBR_REG;
  62   CHAR8   Char;
  63
  64   while ((MmioRead8(LSR) & UART_LSR_RX_FIFO_E_MASK) == UART_LSR_RX_FIFO_E_EMPTY);
  65   Char = MmioRead8(RBR);
  66
  67   return Char;
  68 }
  69
  70 VOID
  71 EFIAPI
  72 GdbPutChar (
  73   IN  CHAR8   Char
  74   )
  75 {
  76   UINT32  LSR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_LSR_REG;
  77   UINT32  THR = UartBase(PcdGet32(PcdOmap35xxConsoleUart)) + UART_THR_REG;
  78
  79   while ((MmioRead8(LSR) & UART_LSR_TX_FIFO_E_MASK) == UART_LSR_TX_FIFO_E_NOT_EMPTY);
  80   MmioWrite8(THR, Char);
  81 }
  82
  83 VOID
  84 GdbPutString (
  85   IN CHAR8  *String
  86   )
  87 {
  88   while (*String != '\0') {
  89     GdbPutChar (*String);
  90     String++;
  91   }
  92 }
  93
  94
  95
  96