/**

  * $Id$

  * 

  * Generic syscall support - ability to add hooks into SH4 code to call out

  * to the emu.

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * This program 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 of the License, or

  * (at your option) any later version.

  *

  * This program 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.

  */

 #ifndef lxdream_syscall_H

 #define lxdream_syscall_H 1

 #include <stdint.h>

 #include <glib/gtypes.h>

 #ifdef __cplusplus

 extern "C" {

 #endif

 typedef void (*syscall_hook_func_t)( uint32_t hook_id );

 /**

  * Define a new hook without an indirect vector

  */

 void syscall_add_hook( uint32_t hook_id, syscall_hook_func_t hook );

 /**

  * Define a new hook which indirects through the specified vector address

  * (which must be somewhere in main SH4 ram).

  */

 void syscall_add_hook_vector( uint32_t hook_id, uint32_t vector_addr,

 			      syscall_hook_func_t hook );

 /**

  * Invoke a syscall from the SH4

  */

 void syscall_invoke( uint32_t hook_id );

 /**

  * Repatch all syscall vectors (eg in case of system reset)

  */

 void syscall_repatch_vectors( );

 /************************ Standard syscall hacks ************************/

 /**

  * Install the BIOS emu hack into ram (sets the vectors at 8C0000B0 through 

  * 8C0000C0)

  */

 void bios_install( void );

 void bios_boot( uint32_t syscallid );

 /**

  * Install the DCLoad syscall hack

  */

 void dcload_install( void );

 /**

  * Set the flag that indicates whether the dcload exit() syscall will be

  * honoured by exiting the VM.

  */

 void dcload_set_allow_unsafe( gboolean allow );

 #define IS_SYSCALL(pc)  (((uint32_t)pc)>=0xFFFFFF00)

 #ifdef __cplusplus

 }

 #endif

 #endif /* !lxdream_syscall_H */