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
GdbSerialLibConstructor(VOID)26 GdbSerialLibConstructor (
27 VOID
28 )
29 {
30 return RETURN_SUCCESS;
31 }
32
33 RETURN_STATUS
34 EFIAPI
GdbSerialInit(IN UINT64 BaudRate,IN UINT8 Parity,IN UINT8 DataBits,IN UINT8 StopBits)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
GdbIsCharAvailable(VOID)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
GdbGetChar(VOID)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
GdbPutChar(IN CHAR8 Char)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
GdbPutString(IN CHAR8 * String)90 GdbPutString (
91 IN CHAR8 *String
92 )
93 {
94 while (*String != '\0') {
95 GdbPutChar (*String);
96 String++;
97 }
98 }
99
100
101
102
103