| 1 | /* dve.c -- I/O code for the Densan DVE-R3900 board. |
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| 2 | * |
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| 3 | * Copyright (c) 1998, 1999 Cygnus Support |
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| 4 | * |
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| 5 | * The authors hereby grant permission to use, copy, modify, distribute, |
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| 6 | * and license this software and its documentation for any purpose, provided |
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| 7 | * that existing copyright notices are retained in all copies and that this |
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| 8 | * notice is included verbatim in any distributions. No written agreement, |
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| 9 | * license, or royalty fee is required for any of the authorized uses. |
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| 10 | * Modifications to this software may be copyrighted by their authors |
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| 11 | * and need not follow the licensing terms described here, provided that |
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| 12 | * the new terms are clearly indicated on the first page of each file where |
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| 13 | * they apply. |
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| 14 | */ |
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| 15 | |
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| 16 | /* Flag indicating that we are being debugged by GDB. If set, |
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| 17 | preceded each character output to the console with a ^O, |
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| 18 | so that GDB will print it instead of discarding it. */ |
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| 19 | |
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| 20 | int output_debug = 1; |
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| 21 | |
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| 22 | /* Monitor "ci" function (console input) */ |
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| 23 | |
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| 24 | typedef int (*cifunc)(int waitflag); |
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| 25 | #ifdef __mips64 |
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| 26 | static cifunc ci = (cifunc) 0xffffffffbfc00010L; |
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| 27 | #else |
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| 28 | static cifunc ci = (cifunc) 0xbfc00010; |
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| 29 | #endif |
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| 30 | |
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| 31 | #define WAIT 1 |
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| 32 | #define NOWAIT 0 |
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| 33 | #define NOCHAR (-1) |
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| 34 | |
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| 35 | /* Monitor "co" function (console output) */ |
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| 36 | |
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| 37 | typedef void (*cofunc)(int c); |
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| 38 | #ifdef __mips64 |
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| 39 | static cofunc co = (cofunc) 0xffffffffbfc00018L; |
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| 40 | #else |
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| 41 | static cofunc co = (cofunc) 0xbfc00018; |
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| 42 | #endif |
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| 43 | |
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| 44 | /* outbyte -- shove a byte out the serial port; used by write.c. */ |
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| 45 | |
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| 46 | int |
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| 47 | outbyte(byte) |
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| 48 | unsigned char byte; |
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| 49 | { |
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| 50 | /* Output a ^O prefix so that GDB won't discard the output. */ |
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| 51 | if (output_debug) |
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| 52 | co (0x0f); |
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| 53 | |
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| 54 | co (byte); |
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| 55 | return byte; |
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| 56 | } |
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| 57 | |
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| 58 | /* inbyte -- get a byte from the serial port; used by read.c. */ |
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| 59 | |
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| 60 | unsigned char |
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| 61 | inbyte() |
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| 62 | { |
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| 63 | return (unsigned char) ci (WAIT); |
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| 64 | } |
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| 65 | |
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| 66 | |
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| 67 | /* Structure filled in by get_mem_info. Only the size field is |
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| 68 | actually used (by sbrk), so the others aren't even filled in. */ |
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| 69 | |
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| 70 | struct s_mem |
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| 71 | { |
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| 72 | unsigned int size; |
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| 73 | unsigned int icsize; |
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| 74 | unsigned int dcsize; |
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| 75 | }; |
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| 76 | |
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| 77 | |
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| 78 | void |
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| 79 | get_mem_info (mem) |
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| 80 | struct s_mem *mem; |
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| 81 | { |
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| 82 | mem->size = 0x1000000; /* DVE-R3900 board has 16 MB of RAM */ |
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| 83 | } |
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