| 1 |
786 |
skrzyp |
//=============================================================================
|
| 2 |
|
|
//
|
| 3 |
|
|
// hal_syscall.c
|
| 4 |
|
|
//
|
| 5 |
|
|
//
|
| 6 |
|
|
//
|
| 7 |
|
|
//=============================================================================
|
| 8 |
|
|
// ####ECOSGPLCOPYRIGHTBEGIN####
|
| 9 |
|
|
// -------------------------------------------
|
| 10 |
|
|
// This file is part of eCos, the Embedded Configurable Operating System.
|
| 11 |
|
|
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
|
| 12 |
|
|
//
|
| 13 |
|
|
// eCos is free software; you can redistribute it and/or modify it under
|
| 14 |
|
|
// the terms of the GNU General Public License as published by the Free
|
| 15 |
|
|
// Software Foundation; either version 2 or (at your option) any later
|
| 16 |
|
|
// version.
|
| 17 |
|
|
//
|
| 18 |
|
|
// eCos is distributed in the hope that it will be useful, but WITHOUT
|
| 19 |
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 20 |
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
| 21 |
|
|
// for more details.
|
| 22 |
|
|
//
|
| 23 |
|
|
// You should have received a copy of the GNU General Public License
|
| 24 |
|
|
// along with eCos; if not, write to the Free Software Foundation, Inc.,
|
| 25 |
|
|
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
| 26 |
|
|
//
|
| 27 |
|
|
// As a special exception, if other files instantiate templates or use
|
| 28 |
|
|
// macros or inline functions from this file, or you compile this file
|
| 29 |
|
|
// and link it with other works to produce a work based on this file,
|
| 30 |
|
|
// this file does not by itself cause the resulting work to be covered by
|
| 31 |
|
|
// the GNU General Public License. However the source code for this file
|
| 32 |
|
|
// must still be made available in accordance with section (3) of the GNU
|
| 33 |
|
|
// General Public License v2.
|
| 34 |
|
|
//
|
| 35 |
|
|
// This exception does not invalidate any other reasons why a work based
|
| 36 |
|
|
// on this file might be covered by the GNU General Public License.
|
| 37 |
|
|
// -------------------------------------------
|
| 38 |
|
|
// ####ECOSGPLCOPYRIGHTEND####
|
| 39 |
|
|
//=============================================================================
|
| 40 |
|
|
//#####DESCRIPTIONBEGIN####
|
| 41 |
|
|
//
|
| 42 |
|
|
// Author(s): msalter
|
| 43 |
|
|
// Contributors:msalter
|
| 44 |
|
|
// Date: 2000-11-5
|
| 45 |
|
|
// Purpose:
|
| 46 |
|
|
// Description:
|
| 47 |
|
|
//
|
| 48 |
|
|
//
|
| 49 |
|
|
//
|
| 50 |
|
|
//####DESCRIPTIONEND####
|
| 51 |
|
|
//
|
| 52 |
|
|
//=============================================================================
|
| 53 |
|
|
|
| 54 |
|
|
#include <pkgconf/hal.h>
|
| 55 |
|
|
|
| 56 |
|
|
#ifdef CYGPKG_REDBOOT
|
| 57 |
|
|
#include <pkgconf/redboot.h>
|
| 58 |
|
|
#endif
|
| 59 |
|
|
|
| 60 |
|
|
#if defined(CYGSEM_REDBOOT_BSP_SYSCALLS)
|
| 61 |
|
|
|
| 62 |
|
|
#include <cyg/hal/hal_stub.h> // Our header
|
| 63 |
|
|
#include <cyg/hal/hal_arch.h> // HAL_BREAKINST
|
| 64 |
|
|
#include <cyg/hal/hal_cache.h> // HAL_xCACHE_x
|
| 65 |
|
|
#include <cyg/hal/hal_intr.h> // interrupt disable/restore
|
| 66 |
|
|
|
| 67 |
|
|
#include <cyg/hal/hal_if.h> // ROM calling interface
|
| 68 |
|
|
#include <cyg/hal/hal_misc.h> // Helper functions
|
| 69 |
|
|
|
| 70 |
|
|
extern int __do_syscall(int func, // syscall function number
|
| 71 |
|
|
long arg1, long arg2, // up to four args.
|
| 72 |
|
|
long arg3, long arg4,
|
| 73 |
|
|
int *retval, // syscall return value
|
| 74 |
|
|
int *sig); // signal to return (or 0)
|
| 75 |
|
|
|
| 76 |
|
|
#define SYS_exit 1
|
| 77 |
|
|
#define SYS_interrupt 1000
|
| 78 |
|
|
|
| 79 |
|
|
int
|
| 80 |
|
|
hal_syscall_handler(void)
|
| 81 |
|
|
{
|
| 82 |
|
|
int func, arg1, arg2, arg3, arg4;
|
| 83 |
|
|
int err, sig;
|
| 84 |
|
|
|
| 85 |
|
|
#if 0
|
| 86 |
|
|
union arm_insn inst;
|
| 87 |
|
|
|
| 88 |
|
|
// What is the instruction we were executing
|
| 89 |
|
|
//
|
| 90 |
|
|
inst.word = *(unsigned long *)(regs->_pc - ARM_INST_SIZE);
|
| 91 |
|
|
|
| 92 |
|
|
// Not a syscall. Don't handle it
|
| 93 |
|
|
if ((inst.swi.rsv1 != SWI_RSV1_VALUE) || (inst.swi.swi_number != SYSCALL_SWI))
|
| 94 |
|
|
return 0;
|
| 95 |
|
|
#endif
|
| 96 |
|
|
|
| 97 |
|
|
func = get_register(R0);
|
| 98 |
|
|
arg1 = get_register(R1);
|
| 99 |
|
|
arg2 = get_register(R2);
|
| 100 |
|
|
arg3 = get_register(R3);
|
| 101 |
|
|
arg4 = *(unsigned int *)(get_register(SP) + 4);
|
| 102 |
|
|
|
| 103 |
|
|
if ((get_register(PS) & CPSR_MODE_BITS) == CPSR_SUPERVISOR_MODE)
|
| 104 |
|
|
put_register(PC, get_register(IP));
|
| 105 |
|
|
else
|
| 106 |
|
|
put_register(PC, get_register(LR));
|
| 107 |
|
|
|
| 108 |
|
|
if (func == SYS_interrupt) {
|
| 109 |
|
|
// A console interrupt landed us here.
|
| 110 |
|
|
// Invoke the debug agent so as to cause a SIGINT.
|
| 111 |
|
|
return SIGINT;
|
| 112 |
|
|
}
|
| 113 |
|
|
|
| 114 |
|
|
if (__do_syscall(func, arg1, arg2, arg3, arg4, &err, &sig)) {
|
| 115 |
|
|
put_register(R0, err);
|
| 116 |
|
|
return sig;
|
| 117 |
|
|
}
|
| 118 |
|
|
|
| 119 |
|
|
return SIGTRAP;
|
| 120 |
|
|
}
|
| 121 |
|
|
|
| 122 |
|
|
#endif // CYGSEM_REDBOOT_BSP_SYSCALLS
|
