Last change
on this file since 492 was
444,
checked in by satin@…, 6 years ago
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add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
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File size:
1.5 KB
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Rev | Line | |
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[444] | 1 | /* |
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| 2 | * mbx-outbyte.c -- outbyte function for targets using the eppcbug monitor |
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| 3 | * |
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| 4 | * Copyright (c) 1998 Cygnus Support |
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| 5 | * |
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| 6 | * The authors hereby grant permission to use, copy, modify, distribute, |
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| 7 | * and license this software and its documentation for any purpose, provided |
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| 8 | * that existing copyright notices are retained in all copies and that this |
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| 9 | * notice is included verbatim in any distributions. No written agreement, |
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| 10 | * license, or royalty fee is required for any of the authorized uses. |
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| 11 | * Modifications to this software may be copyrighted by their authors |
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| 12 | * and need not follow the licensing terms described here, provided that |
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| 13 | * the new terms are clearly indicated on the first page of each file where |
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| 14 | * they apply. |
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| 15 | */ |
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| 16 | |
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| 17 | #include "ppc-asm.h" |
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| 18 | |
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| 19 | static int sendbyte(char c) |
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| 20 | { |
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| 21 | struct { |
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| 22 | unsigned clun; |
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| 23 | unsigned dlun; |
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| 24 | char *data; |
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| 25 | unsigned len; |
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| 26 | unsigned rsrvd; |
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| 27 | char buf[4]; |
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| 28 | } ipb, *inpb; |
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| 29 | |
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| 30 | struct { |
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| 31 | int status; |
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| 32 | int cnt; |
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| 33 | } opb, *outpb; |
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| 34 | |
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| 35 | inpb = &ipb; |
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| 36 | outpb = &opb; |
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| 37 | |
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| 38 | inpb->clun = 0; |
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| 39 | inpb->dlun = 0; |
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| 40 | inpb->data = ipb.buf; |
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| 41 | inpb->len = 1; |
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| 42 | inpb->rsrvd = 0; |
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| 43 | inpb->buf[0] = c; |
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| 44 | |
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| 45 | asm volatile ( |
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| 46 | "mr 3,%0\n" |
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| 47 | "mr 4,%1\n" |
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| 48 | "li 10,0x201\n" |
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| 49 | "sc" |
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| 50 | : /* no outputs */ |
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| 51 | : "r" (inpb), "r" (outpb) |
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| 52 | : "3", "4", "10" |
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| 53 | ); |
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| 54 | |
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| 55 | return (outpb->status == 0 && outpb->cnt == 1); |
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| 56 | } |
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| 57 | |
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| 58 | #define GDB_QUOTE_OUTBYTES 1 |
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| 59 | |
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| 60 | void outbyte(char c) |
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| 61 | { |
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| 62 | #ifdef GDB_QUOTE_OUTBYTES |
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| 63 | /* |
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| 64 | * GDB monitor.c will echo characters quoted with ^O |
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| 65 | */ |
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| 66 | while (!sendbyte('\017')) ; |
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| 67 | #endif |
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| 68 | while (!sendbyte(c)) ; |
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| 69 | } |
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| 70 | |
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| 71 | |
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