arch/tile/lib/mb_incoherent.S

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  *
  14  * Assembly code for invoking the HV's fence_incoherent syscall.
  15  */
  16
  17 #include <linux/linkage.h>
  18 #include <hv/syscall_public.h>
  19 #include <arch/abi.h>
  20 #include <arch/chip.h>
  21
  22 #if !CHIP_HAS_MF_WAITS_FOR_VICTIMS()
  23
  24 /*
  25  * Invoke the hypervisor's fence_incoherent syscall, which guarantees
  26  * that all victims for cachelines homed on this tile have reached memory.
  27  */
  28 STD_ENTRY(__mb_incoherent)
  29         moveli TREG_SYSCALL_NR_NAME, HV_SYS_fence_incoherent
  30         swint2
  31         jrp lr
  32         STD_ENDPROC(__mb_incoherent)
  33
  34 #endif