Commit | Line | Data |
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a6caee65 | 1 | /** @file\r |
2 | Basic serial IO abstaction for GDB\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
3402aac7 | 5 | \r |
a6caee65 | 6 | This program and the accompanying materials\r |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <Uefi.h>\r | |
17 | #include <Library/GdbSerialLib.h>\r | |
18 | #include <Library/PcdLib.h>\r | |
19 | #include <Library/IoLib.h>\r | |
20 | #include <Drivers/PL011Uart.h>\r | |
21 | \r | |
22 | RETURN_STATUS\r | |
23 | EFIAPI\r | |
24 | GdbSerialLibConstructor (\r | |
25 | VOID\r | |
26 | )\r | |
27 | {\r | |
28 | return GdbSerialInit (115200, 0, 8, 1);\r | |
29 | }\r | |
30 | \r | |
31 | RETURN_STATUS\r | |
32 | EFIAPI\r | |
33 | GdbSerialInit (\r | |
3402aac7 RC |
34 | IN UINT64 BaudRate,\r |
35 | IN UINT8 Parity,\r | |
36 | IN UINT8 DataBits,\r | |
37 | IN UINT8 StopBits\r | |
a6caee65 | 38 | )\r |
39 | {\r | |
40 | if ((Parity != 0) || (DataBits != 8) || (StopBits != 1)) {\r | |
41 | return RETURN_UNSUPPORTED;\r | |
42 | }\r | |
43 | \r | |
44 | if (BaudRate != 115200) {\r | |
45 | // Could add support for different Baud rates....\r | |
46 | return RETURN_UNSUPPORTED;\r | |
47 | }\r | |
3402aac7 | 48 | \r |
1d5d0ae9 | 49 | UINT32 Base = PcdGet32 (PcdGdbUartBase);\r |
3402aac7 | 50 | \r |
1d5d0ae9 | 51 | // initialize baud rate generator to 115200 based on EB clock REFCLK24MHZ\r |
52 | MmioWrite32 (Base + UARTIBRD, UART_115200_IDIV);\r | |
53 | MmioWrite32 (Base + UARTFBRD, UART_115200_FDIV);\r | |
54 | \r | |
55 | // no parity, 1 stop, no fifo, 8 data bits\r | |
56 | MmioWrite32 (Base + UARTLCR_H, 0x60);\r | |
57 | \r | |
58 | // clear any pending errors\r | |
59 | MmioWrite32 (Base + UARTECR, 0);\r | |
60 | \r | |
61 | // enable tx, rx, and uart overall\r | |
62 | MmioWrite32 (Base + UARTCR, 0x301);\r | |
63 | \r | |
64 | return RETURN_SUCCESS;\r | |
a6caee65 | 65 | }\r |
66 | \r | |
67 | BOOLEAN\r | |
68 | EFIAPI\r | |
69 | GdbIsCharAvailable (\r | |
70 | VOID\r | |
3402aac7 | 71 | )\r |
a6caee65 | 72 | {\r |
1d5d0ae9 | 73 | UINT32 FR = PcdGet32 (PcdGdbUartBase) + UARTFR;\r |
74 | \r | |
75 | if ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0) {\r | |
76 | return TRUE;\r | |
77 | } else {\r | |
78 | return FALSE;\r | |
79 | }\r | |
a6caee65 | 80 | }\r |
81 | \r | |
82 | CHAR8\r | |
83 | EFIAPI\r | |
84 | GdbGetChar (\r | |
85 | VOID\r | |
86 | )\r | |
87 | {\r | |
1d5d0ae9 | 88 | UINT32 FR = PcdGet32 (PcdGdbUartBase) + UARTFR;\r |
89 | UINT32 DR = PcdGet32 (PcdGdbUartBase) + UARTDR;\r | |
3402aac7 | 90 | \r |
1d5d0ae9 | 91 | while ((MmioRead32 (FR) & UART_RX_EMPTY_FLAG_MASK) == 0);\r |
92 | return MmioRead8 (DR);\r | |
a6caee65 | 93 | }\r |
94 | \r | |
95 | VOID\r | |
96 | EFIAPI\r | |
97 | GdbPutChar (\r | |
98 | IN CHAR8 Char\r | |
99 | )\r | |
100 | {\r | |
1d5d0ae9 | 101 | UINT32 FR = PcdGet32 (PcdGdbUartBase) + UARTFR;\r |
102 | UINT32 DR = PcdGet32 (PcdGdbUartBase) + UARTDR;\r | |
103 | \r | |
104 | while ((MmioRead32 (FR) & UART_TX_EMPTY_FLAG_MASK) != 0);\r | |
105 | MmioWrite8 (DR, Char);\r | |
a6caee65 | 106 | return;\r |
107 | }\r | |
108 | \r | |
109 | VOID\r | |
110 | GdbPutString (\r | |
111 | IN CHAR8 *String\r | |
112 | )\r | |
113 | {\r | |
114 | while (*String != '\0') {\r | |
115 | GdbPutChar (*String);\r | |
116 | String++;\r | |
117 | }\r | |
118 | }\r |