7 /* we need uint32 uint8 */
8 /* #include "types.h" */
9 typedef unsigned char uint8;
10 typedef unsigned int uint32;
12 /* --- END OF CONFIG --- */
14 #define UART16550_BAUD_2400 2400
15 #define UART16550_BAUD_4800 4800
16 #define UART16550_BAUD_9600 9600
17 #define UART16550_BAUD_19200 19200
18 #define UART16550_BAUD_38400 38400
19 #define UART16550_BAUD_57600 57600
20 #define UART16550_BAUD_115200 115200
22 #define UART16550_PARITY_NONE 0
23 #define UART16550_PARITY_ODD 0x08
24 #define UART16550_PARITY_EVEN 0x18
25 #define UART16550_PARITY_MARK 0x28
26 #define UART16550_PARITY_SPACE 0x38
28 #define UART16550_DATA_5BIT 0x0
29 #define UART16550_DATA_6BIT 0x1
30 #define UART16550_DATA_7BIT 0x2
31 #define UART16550_DATA_8BIT 0x3
33 #define UART16550_STOP_1BIT 0x0
34 #define UART16550_STOP_2BIT 0x4
36 /* ----------------------------------------------------- */
40 /* [stevel] we use the IT8712 serial port for kgdb */
41 #define DEBUG_BASE 0xB40003F8 /* 8712 serial port 1 base address */
42 #define MAX_BAUD 115200
44 /* === END OF CONFIG === */
47 #define OFS_RCV_BUFFER 0
48 #define OFS_TRANS_HOLD 0
49 #define OFS_SEND_BUFFER 0
50 #define OFS_INTR_ENABLE 1
52 #define OFS_DATA_FORMAT 3
53 #define OFS_LINE_CONTROL 3
54 #define OFS_MODEM_CONTROL 4
55 #define OFS_RS232_OUTPUT 4
56 #define OFS_LINE_STATUS 5
57 #define OFS_MODEM_STATUS 6
58 #define OFS_RS232_INPUT 6
59 #define OFS_SCRATCH_PAD 7
61 #define OFS_DIVISOR_LSB 0
62 #define OFS_DIVISOR_MSB 1
65 /* memory-mapped read/write of the port */
66 #define UART16550_READ(y) (*((volatile uint8*)(DEBUG_BASE + y)))
67 #define UART16550_WRITE(y,z) ((*((volatile uint8*)(DEBUG_BASE + y))) = z)
69 void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop)
71 /* disable interrupts */
72 UART16550_WRITE(OFS_INTR_ENABLE, 0);
74 /* set up baud rate */
79 UART16550_WRITE(OFS_LINE_CONTROL, 0x80);
82 divisor = MAX_BAUD / baud;
83 UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff);
84 UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8);
87 UART16550_WRITE(OFS_LINE_CONTROL, 0x0);
91 UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop);
94 static int remoteDebugInitialized = 0;
96 uint8 getDebugChar(void)
98 if (!remoteDebugInitialized) {
99 remoteDebugInitialized = 1;
100 debugInit(UART16550_BAUD_115200,
102 UART16550_PARITY_NONE, UART16550_STOP_1BIT);
105 while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0);
106 return UART16550_READ(OFS_RCV_BUFFER);
110 int putDebugChar(uint8 byte)
112 if (!remoteDebugInitialized) {
113 remoteDebugInitialized = 1;
114 debugInit(UART16550_BAUD_115200,
116 UART16550_PARITY_NONE, UART16550_STOP_1BIT);
119 while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0);
120 UART16550_WRITE(OFS_SEND_BUFFER, byte);