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/***********************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 "octeon-model.h"
/* other useful stuff */
#define CVMX_SYNC asm volatile ("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 asm volatile ("nop")
#define CVMX_SYNCIOBDMA asm volatile ("synciobdma" : : : "memory")
/* Deprecated, will be removed in future release */
#define CVMX_SYNCIOALL asm volatile ("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 asm volatile ("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 asm volatile ("nop")
#define CVMX_SYNCIOBDMA asm volatile ("sync" : : : "memory")
/* Deprecated, will be removed in future release */
#define CVMX_SYNCIOALL asm volatile ("nop")
#define CVMX_SYNCW asm volatile ("sync" : : : "memory")
#define CVMX_SYNCWS CVMX_SYNCW
#define CVMX_SYNCS CVMX_SYNC
#define CVMX_SYNCWS_STR CVMX_SYNCW_STR
#endif
/*
* 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) \
asm volatile ("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) \
asm volatile ("pref 29, " CVMX_TMP_STR(offset) "(%[rbase])" : : \
[rbase] "d" (address))
/* flush stores, invalidate entire icache */
#define CVMX_ICACHE_INVALIDATE \
{ CVMX_SYNC; asm volatile ("synci 0($0)" : : ); }
/* flush stores, invalidate entire icache */
#define CVMX_ICACHE_INVALIDATE2 \
{ CVMX_SYNC; asm volatile ("cache 0, 0($0)" : : ); }
/* complete prefetches, invalidate entire dcache */
#define CVMX_DCACHE_INVALIDATE \
{ CVMX_SYNC; asm volatile ("cache 9, 0($0)" : : ); }
#define CVMX_POP(result, input) \
asm ("pop %[rd],%[rs]" : [rd] "=d" (result) : [rs] "d" (input))
#define CVMX_DPOP(result, input) \
asm ("dpop %[rd],%[rs]" : [rd] "=d" (result) : [rs] "d" (input))
/* some new cop0-like stuff */
#define CVMX_RDHWR(result, regstr) \
asm volatile ("rdhwr %[rt],$" CVMX_TMP_STR(regstr) : [rt] "=d" (result))
#define CVMX_RDHWRNV(result, regstr) \
asm ("rdhwr %[rt],$" CVMX_TMP_STR(regstr) : [rt] "=d" (result))
#endif /* __CVMX_ASM_H__ */
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