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annotate packages/hal/arm/arch/current/src/hal_syscall.c @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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 Free Software Foundation, 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
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //=============================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): msalter
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43 // Contributors:msalter
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44 // Date: 2000-11-5
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45 // Purpose:
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46 // Description:
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47 //
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48 //
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //=============================================================================
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53
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54 #include <pkgconf/hal.h>
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55
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56 #ifdef CYGPKG_REDBOOT
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57 #include <pkgconf/redboot.h>
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58 #endif
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59
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60 #if defined(CYGSEM_REDBOOT_BSP_SYSCALLS)
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61
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62 #include <cyg/hal/hal_stub.h> // Our header
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63 #include <cyg/hal/hal_arch.h> // HAL_BREAKINST
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64 #include <cyg/hal/hal_cache.h> // HAL_xCACHE_x
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65 #include <cyg/hal/hal_intr.h> // interrupt disable/restore
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66
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67 #include <cyg/hal/hal_if.h> // ROM calling interface
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68 #include <cyg/hal/hal_misc.h> // Helper functions
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69
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70 extern int __do_syscall(int func, // syscall function number
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71 long arg1, long arg2, // up to four args.
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72 long arg3, long arg4,
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73 int *retval, // syscall return value
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74 int *sig); // signal to return (or 0)
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75
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76 #define SYS_exit 1
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77 #define SYS_interrupt 1000
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78
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79 int
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80 hal_syscall_handler(void)
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81 {
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82 int func, arg1, arg2, arg3, arg4;
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83 int err, sig;
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84
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85 #if 0
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86 union arm_insn inst;
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87
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88 // What is the instruction we were executing
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89 //
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90 inst.word = *(unsigned long *)(regs->_pc - ARM_INST_SIZE);
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91
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92 // Not a syscall. Don't handle it
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93 if ((inst.swi.rsv1 != SWI_RSV1_VALUE) || (inst.swi.swi_number != SYSCALL_SWI))
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94 return 0;
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95 #endif
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96
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97 func = get_register(R0);
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98 arg1 = get_register(R1);
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99 arg2 = get_register(R2);
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100 arg3 = get_register(R3);
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101 arg4 = *(unsigned int *)(get_register(SP) + 4);
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102
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103 if ((get_register(PS) & CPSR_MODE_BITS) == CPSR_SUPERVISOR_MODE)
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104 put_register(PC, get_register(IP));
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105 else
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106 put_register(PC, get_register(LR));
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107
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108 if (func == SYS_interrupt) {
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109 // A console interrupt landed us here.
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110 // Invoke the debug agent so as to cause a SIGINT.
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111 return SIGINT;
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112 }
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113
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114 if (__do_syscall(func, arg1, arg2, arg3, arg4, &err, &sig)) {
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115 put_register(R0, err);
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116 return sig;
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117 }
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118
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119 return SIGTRAP;
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120 }
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121
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122 #endif // CYGSEM_REDBOOT_BSP_SYSCALLS