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annotate packages/hal/i386/linux/current/src/hal_diag.c @ 44:41bd4f3a90de ecos-sw-1999-10-08

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Merge from eCos master repository on 1999-10-08-07:47:04-BST
author jlarmour
date Fri, 08 Oct 1999 13:16:25 +0000
parents 443894e2e912
children 7a6ac9edc838
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1 //=============================================================================
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2 //
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3 // hal_diag.c
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4 //
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5 // HAL diagnostic output code
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6 //
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7 //=============================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Cygnus eCos Public License
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12 // Version 1.0 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://sourceware.cygnus.com/ecos
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15 //
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16 // Software distributed under the License is distributed on an "AS IS"
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Cygnus Operating System, released
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22 // October 31, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Cygnus. Portions created
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25 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved.
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26 // -------------------------------------------
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27 //
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28 //####COPYRIGHTEND####
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29 //=============================================================================
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30 //#####DESCRIPTIONBEGIN####
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31 //
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32 // Author(s): proven
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33 // Contributors:proven
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34 // Date: 1998-10-05
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35 // Purpose: HAL diagnostic output
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36 // Description: Implementations of HAL diagnostic output support.
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37 //
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38 //####DESCRIPTIONEND####
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39 //
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40 //=============================================================================
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41
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42 #include <pkgconf/hal.h>
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43
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44 #include <cyg/infra/cyg_type.h> // base types
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45
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46 #include <cyg/hal/hal_diag.h>
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47
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48 //-----------------------------------------------------------------------------
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49
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50 void hal_diag_init( void )
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51 {
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52 }
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53
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54 externC unsigned long cyg_hal_sys_write(int, const void*, long);
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55 externC unsigned long cyg_hal_sys_read(int, void*, long);
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56
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57 // Write characters to a buffer which is flushed at newline/overflow to
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58 // improve performance.
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59 void hal_diag_write_char(char __c)
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60 {
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61 static cyg_int32 __index = 0;
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62 static cyg_uint8 __buffer[128];
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63
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64 __buffer[__index++] = __c;
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65
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66 if ('\n' == __c || 128 == __index) {
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67 cyg_hal_sys_write(1, &__buffer[0], __index);
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68 __index = 0;
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69 }
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70 }
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71
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72 // Hmm... we need the definition of EINTR, which normally lives in
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73 // <asm/errno.h> on linux. But we can't get at that here, so we just
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74 // hard-code it. The burden of binary compatibility means x86 linux will
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75 // never change it.
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76 #define x86_linux_EINTR 4
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77
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78 void hal_diag_read_char(char *c)
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79 {
44
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80 int rc;
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81
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82 // The read syscall will get woken up by the itimer alarm, but we don't
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83 // want to stop reading if that's the case
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84 do {
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85 rc = cyg_hal_sys_read(0, c, 1);
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86 } while (-x86_linux_EINTR == rc);
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87 }
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88
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89 //-----------------------------------------------------------------------------
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90 // End of hal_diag.c