Mercurial > ecos
diff packages/hal/h8300/arch/current/src/hal_syscall.c @ 208:e0c0827131d1 ecos
Merge from eCos master repository on 2002-05-20-20:11:54-BST
| author | jlarmour |
|---|---|
| date | Mon, 20 May 2002 22:19:26 +0000 |
| parents | |
| children | d2c90368aeef |
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new file mode 100644 --- /dev/null +++ b/packages/hal/h8300/arch/current/src/hal_syscall.c @@ -0,0 +1,111 @@ +//============================================================================= +// +// hal_syscall.c +// +// +// +//============================================================================= +//####ECOSGPLCOPYRIGHTBEGIN#### +// ------------------------------------------- +// This file is part of eCos, the Embedded Configurable Operating System. +// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. +// +// eCos is free software; you can redistribute it and/or modify it under +// the terms of the GNU General Public License as published by the Free +// Software Foundation; either version 2 or (at your option) any later version. +// +// eCos is distributed in the hope that it will be useful, but WITHOUT ANY +// WARRANTY; without even the implied warranty of MERCHANTABILITY or +// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +// for more details. +// +// You should have received a copy of the GNU General Public License along +// with eCos; if not, write to the Free Software Foundation, Inc., +// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or inline functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. However the source code for this file must still be made available +// in accordance with section (3) of the GNU General Public License. +// +// This exception does not invalidate any other reasons why a work based on +// this file might be covered by the GNU General Public License. +// +// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. +// at http://sources.redhat.com/ecos/ecos-license +// ------------------------------------------- +//####ECOSGPLCOPYRIGHTEND#### +//============================================================================= +//#####DESCRIPTIONBEGIN#### +// +// Author(s): msalter +// Contributors:msalter +// Date: 2000-11-5 +// Purpose: +// Description: +// +// +// +//####DESCRIPTIONEND#### +// +//============================================================================= + +#include <pkgconf/hal.h> + +#ifdef CYGPKG_REDBOOT +#include <pkgconf/redboot.h> +#endif + +#if defined(CYGSEM_REDBOOT_BSP_SYSCALLS) + +#include <cyg/hal/hal_stub.h> // Our header +#include <cyg/hal/hal_arch.h> // HAL_BREAKINST +#include <cyg/hal/hal_cache.h> // HAL_xCACHE_x +#include <cyg/hal/hal_intr.h> // interrupt disable/restore + +#include <cyg/hal/hal_if.h> // ROM calling interface +#include <cyg/hal/hal_misc.h> // Helper functions + +extern CYG_ADDRWORD __do_syscall(CYG_ADDRWORD func, // syscall function number + CYG_ADDRWORD arg1, CYG_ADDRWORD arg2, // up to four args. + CYG_ADDRWORD arg3, CYG_ADDRWORD arg4, + CYG_ADDRWORD *retval); // syscall return value + +#define SYS_exit 1 +#define SYS_interrupt 1000 + +int +hal_syscall_handler(void) +{ + CYG_ADDRWORD func, arg1, arg2, arg3, arg4; + CYG_ADDRWORD err; + + func = get_register(ER0); + arg1 = get_register(ER1); + arg2 = get_register(ER2); + arg3 = get_register(ER3); + arg4 = 0; + + if (func == SYS_exit) { + // We want to stop in exit so that the user may poke around + // to see why his app exited. + return SIGTRAP; + } + + if (func == SYS_interrupt) { + // A console interrupt landed us here. + // Invoke the debug agent so as to cause a SIGINT. + return SIGINT; + } + + if (__do_syscall(func, arg1, arg2, arg3, arg4, &err)) { + put_register(D0, err); + return 0; + } + + return SIGTRAP; +} + +#endif // CYGSEM_REDBOOT_BSP_SYSCALLS
