/***********************license start*************** * Author: Cavium Networks * * Contact: support@caviumnetworks.com * This file is part of the OCTEON SDK * * Copyright (c) 2003-2008 Cavium Networks * * This file is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License, Version 2, as * published by the Free Software Foundation. * * This file is distributed in the hope that it will be useful, but * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or * NONINFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this file; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * or visit http://www.gnu.org/licenses/. * * This file may also be available under a different license from Cavium. * Contact Cavium Networks for more information
***********************license end**************************************/
/* * * This is file defines ASM primitives for the executive.
*/ #ifndef __CVMX_ASM_H__ #define __CVMX_ASM_H__
#include <asm/octeon/octeon-model.h>
/* other useful stuff */ #define CVMX_SYNC asmvolatile ("sync" : : : "memory") /* String version of SYNCW macro for using in inline asm constructs */ #define CVMX_SYNCW_STR "syncw\nsyncw\n" #ifdef __OCTEON__
/* Deprecated, will be removed in future release */ #define CVMX_SYNCIO asmvolatile ("nop")
/* Deprecated, will be removed in future release */ #define CVMX_SYNCIOALL asmvolatile ("nop")
/* * We actually use two syncw instructions in a row when we need a write * memory barrier. This is because the CN3XXX series of Octeons have * errata Core-401. This can cause a single syncw to not enforce * ordering under very rare conditions. Even if it is rare, better safe * than sorry.
*/ #define CVMX_SYNCW asmvolatile ("syncw\n\tsyncw" : : : "memory")
/* * Define new sync instructions to be normal SYNC instructions for * operating systems that use threads.
*/ #define CVMX_SYNCWS CVMX_SYNCW #define CVMX_SYNCS CVMX_SYNC #define CVMX_SYNCWS_STR CVMX_SYNCW_STR #else /* * Not using a Cavium compiler, always use the slower sync so the * assembler stays happy.
*/ /* Deprecated, will be removed in future release */ #define CVMX_SYNCIO asmvolatile ("nop")
/* * CVMX_PREPARE_FOR_STORE makes each byte of the block unpredictable * (actually old value or zero) until that byte is stored to (by this or * another processor. Note that the value of each byte is not only * unpredictable, but may also change again - up until the point when one * of the cores stores to the byte.
*/ #define CVMX_PREPARE_FOR_STORE(address, offset) \ asmvolatile ("pref 30, " CVMX_TMP_STR(offset) "(%[rbase])" : : \
[rbase] "d" (address)) /* * This is a command headed to the L2 controller to tell it to clear * its dirty bit for a block. Basically, SW is telling HW that the * current version of the block will not be used.
*/ #define CVMX_DONT_WRITE_BACK(address, offset) \ asmvolatile ("pref 29, " CVMX_TMP_STR(offset) "(%[rbase])" : : \
[rbase] "d" (address))