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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 <asm/octeon/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($0)" : : ); } #define CVMX_CACHE(op, address, offset) \ asm volatile ("cache " CVMX_TMP_STR(op) ", " CVMX_TMP_STR(offset) "(%[rbase])" \ : : [rbase] "d" (address) ) /* fetch and lock the state. */ #define CVMX_CACHE_LCKL2(address, offset) CVMX_CACHE(31, address, offset) /* unlock the state. */ #define CVMX_CACHE_WBIL2(address, offset) CVMX_CACHE(23, address, offset) /* invalidate the cache block and clear the USED bits for the block */ #define CVMX_CACHE_WBIL2I(address, offset) CVMX_CACHE(3, address, offset) /* load virtual tag and data for the L2 cache block into L2C_TAD0_TAG register */ #define CVMX_CACHE_LTGL2I(address, offset) CVMX_CACHE(7, address, offset) #define CVMX_POP(result, input) \ asm ("pop %[rd],%[rs]" : [rd] "=d" (result) : [rs] "d" (input)) #define CVMX_DPOP(result, input) \ asm ("dpop %[rd],%[rs]" : [rd] "=d" (result) : [rs] "d" (input)) /* some new cop0-like stuff */ #define CVMX_RDHWR(result, regstr) \ asm volatile ("rdhwr %[rt],$" 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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