diff packages/hal/frv/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
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+++ b/packages/hal/frv/arch/current/src/hal_syscall.c
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+//=============================================================================
+//
+//      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, gthomas
+// 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 int __do_syscall(int func,		// syscall function number
+			long arg1, long arg2,	// up to four args.
+			long arg3, long arg4,
+			int *retval,		// syscall return value
+			int *sig);              // signal to return (or 0)
+
+#define	SYS_exit	1
+#define SYS_interrupt   1000
+
+int
+hal_syscall_handler(void)
+{
+    int func, arg1, arg2, arg3, arg4;
+    int err, res, sig;
+
+    func = get_register(R7);
+    arg1 = get_register(R8);
+    arg2 = get_register(R9);
+    arg3 = get_register(R10);
+    arg4 = get_register(R11);
+
+    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 ((res = __do_syscall(func, arg1, arg2, arg3, arg4, &err, &sig)) != 0) {
+        // Skip over trap instruction
+        put_register(PC, get_register(PC)+4);
+        put_register(R8, err);
+	return sig;
+    }
+
+    return SIGTRAP;
+}
+#endif // CYGSEM_REDBOOT_BSP_SYSCALLS