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annotate packages/hal/frv/arch/current/src/hal_syscall.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children f2b5df359050
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1 //=============================================================================
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2 //
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3 // hal_syscall.c
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4 //
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5 //
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6 //
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7 //=============================================================================
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //=============================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): msalter
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44 // Contributors:msalter, gthomas
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45 // Date: 2000-11-5
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46 // Purpose:
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47 // Description:
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48 //
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49 //
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //=============================================================================
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54
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55 #include <pkgconf/hal.h>
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56
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57 #ifdef CYGPKG_REDBOOT
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58 #include <pkgconf/redboot.h>
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59 #endif
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60
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61 #if defined(CYGSEM_REDBOOT_BSP_SYSCALLS)
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62
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63 #include <cyg/hal/hal_stub.h> // Our header
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64 #include <cyg/hal/hal_arch.h> // HAL_BREAKINST
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65 #include <cyg/hal/hal_cache.h> // HAL_xCACHE_x
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66 #include <cyg/hal/hal_intr.h> // interrupt disable/restore
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67
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68 #include <cyg/hal/hal_if.h> // ROM calling interface
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69 #include <cyg/hal/hal_misc.h> // Helper functions
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70
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71 extern int __do_syscall(int func, // syscall function number
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72 long arg1, long arg2, // up to four args.
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73 long arg3, long arg4,
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74 int *retval, // syscall return value
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75 int *sig); // signal to return (or 0)
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76
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77 #define SYS_exit 1
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78 #define SYS_interrupt 1000
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79
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80 int
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81 hal_syscall_handler(void)
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82 {
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83 int func, arg1, arg2, arg3, arg4;
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84 int err, res, sig;
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85
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86 func = get_register(R7);
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87 arg1 = get_register(R8);
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88 arg2 = get_register(R9);
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89 arg3 = get_register(R10);
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90 arg4 = get_register(R11);
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91
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92 if (func == SYS_exit) {
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93 // We want to stop in exit so that the user may poke around
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94 // to see why his app exited.
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95 return SIGTRAP;
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96 }
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97
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98 if (func == SYS_interrupt) {
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99 // A console interrupt landed us here.
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100 // Invoke the debug agent so as to cause a SIGINT.
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101 return SIGINT;
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102 }
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103
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104 if ((res = __do_syscall(func, arg1, arg2, arg3, arg4, &err, &sig)) != 0) {
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105 // Skip over trap instruction
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106 put_register(PC, get_register(PC)+4);
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107 put_register(R8, err);
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108 return sig;
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109 }
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110
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111 return SIGTRAP;
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112 }
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113 #endif // CYGSEM_REDBOOT_BSP_SYSCALLS