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 } 100 101 102 103 104
