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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | /* * kgdb io functions for DDB5476. We use the second serial port. * * Copyright (C) 2001 MontaVista Software Inc. * Author: jsun@mvista.com or jsun@junsun.net * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * */ /* ======================= CONFIG ======================== */ /* [jsun] we use the second serial port for kdb */ #define BASE 0xa60002f8 #define MAX_BAUD 115200 /* distance in bytes between two serial registers */ #define REG_OFFSET 1 /* * 0 - kgdb does serial init * 1 - kgdb skip serial init */ static int remoteDebugInitialized = 0; /* * the default baud rate *if* kgdb does serial init */ #define BAUD_DEFAULT UART16550_BAUD_38400 /* ======================= END OF CONFIG ======================== */ typedef unsigned char uint8; typedef unsigned int uint32; #define UART16550_BAUD_2400 2400 #define UART16550_BAUD_4800 4800 #define UART16550_BAUD_9600 9600 #define UART16550_BAUD_19200 19200 #define UART16550_BAUD_38400 38400 #define UART16550_BAUD_57600 57600 #define UART16550_BAUD_115200 115200 #define UART16550_PARITY_NONE 0 #define UART16550_PARITY_ODD 0x08 #define UART16550_PARITY_EVEN 0x18 #define UART16550_PARITY_MARK 0x28 #define UART16550_PARITY_SPACE 0x38 #define UART16550_DATA_5BIT 0x0 #define UART16550_DATA_6BIT 0x1 #define UART16550_DATA_7BIT 0x2 #define UART16550_DATA_8BIT 0x3 #define UART16550_STOP_1BIT 0x0 #define UART16550_STOP_2BIT 0x4 /* register offset */ #define OFS_RCV_BUFFER 0 #define OFS_TRANS_HOLD 0 #define OFS_SEND_BUFFER 0 #define OFS_INTR_ENABLE (1*REG_OFFSET) #define OFS_INTR_ID (2*REG_OFFSET) #define OFS_DATA_FORMAT (3*REG_OFFSET) #define OFS_LINE_CONTROL (3*REG_OFFSET) #define OFS_MODEM_CONTROL (4*REG_OFFSET) #define OFS_RS232_OUTPUT (4*REG_OFFSET) #define OFS_LINE_STATUS (5*REG_OFFSET) #define OFS_MODEM_STATUS (6*REG_OFFSET) #define OFS_RS232_INPUT (6*REG_OFFSET) #define OFS_SCRATCH_PAD (7*REG_OFFSET) #define OFS_DIVISOR_LSB (0*REG_OFFSET) #define OFS_DIVISOR_MSB (1*REG_OFFSET) /* memory-mapped read/write of the port */ #define UART16550_READ(y) (*((volatile uint8*)(BASE + y))) #define UART16550_WRITE(y, z) ((*((volatile uint8*)(BASE + y))) = z) void debugInit(uint32 baud, uint8 data, uint8 parity, uint8 stop) { /* disable interrupts */ UART16550_WRITE(OFS_INTR_ENABLE, 0); /* set up buad rate */ { uint32 divisor; /* set DIAB bit */ UART16550_WRITE(OFS_LINE_CONTROL, 0x80); /* set divisor */ divisor = MAX_BAUD / baud; UART16550_WRITE(OFS_DIVISOR_LSB, divisor & 0xff); UART16550_WRITE(OFS_DIVISOR_MSB, (divisor & 0xff00) >> 8); /* clear DIAB bit */ UART16550_WRITE(OFS_LINE_CONTROL, 0x0); } /* set data format */ UART16550_WRITE(OFS_DATA_FORMAT, data | parity | stop); } uint8 getDebugChar(void) { if (!remoteDebugInitialized) { remoteDebugInitialized = 1; debugInit(BAUD_DEFAULT, UART16550_DATA_8BIT, UART16550_PARITY_NONE, UART16550_STOP_1BIT); } while ((UART16550_READ(OFS_LINE_STATUS) & 0x1) == 0); return UART16550_READ(OFS_RCV_BUFFER); } int putDebugChar(uint8 byte) { if (!remoteDebugInitialized) { remoteDebugInitialized = 1; debugInit(BAUD_DEFAULT, UART16550_DATA_8BIT, UART16550_PARITY_NONE, UART16550_STOP_1BIT); } while ((UART16550_READ(OFS_LINE_STATUS) & 0x20) == 0); UART16550_WRITE(OFS_SEND_BUFFER, byte); return 1; } |