kernel/arch/sparc64/include/trap/syscall.h

   1 /*
   2  * Copyright (c) 2006 Jakub Jermar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup sparc64interrupt
  30  * @{
  31  */
  32 /**
  33  * @file
  34  * @brief This file contains the trap_instruction handler.
  35  *
  36  * The trap_instruction trap is used to implement syscalls.
  37  */
  38
  39 #ifndef KERN_sparc64_SYSCALL_TRAP_H_
  40 #define KERN_sparc64_SYSCALL_TRAP_H_
  41
  42 #define TT_TRAP_INSTRUCTION(n)          (0x100 + (n))
  43 #define TT_TRAP_INSTRUCTION_LAST        TT_TRAP_INSTRUCTION(127)
  44
  45 #ifdef __ASM__
  46
  47 .macro TRAP_INSTRUCTION n
  48         mov TT_TRAP_INSTRUCTION(\n), %g2
  49         sethi %hi(syscall), %g1
  50         ba trap_instruction_handler
  51         or %g1, %lo(syscall), %g1
  52 .endm
  53
  54 #endif /* __ASM__ */
  55
  56 #endif
  57
  58 /** @}
  59  */