1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2012 Olivier Houchard. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. 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 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 #include <sys/types.h> 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/bus.h> 32 #include <sys/rman.h> 33 #include <sys/lock.h> 34 #include <sys/mutex.h> 35 36 #include <machine/bus.h> 37 #include <machine/pl310.h> 38 #include <machine/platformvar.h> 39 40 #include <arm/ti/ti_smc.h> 41 #include <arm/ti/omap4/omap4_machdep.h> 42 #include <arm/ti/omap4/omap4_smc.h> 43 44 #include "platform_pl310_if.h" 45 46 void 47 omap4_pl310_init(platform_t plat, struct pl310_softc *sc) 48 { 49 uint32_t aux, prefetch; 50 51 aux = pl310_read4(sc, PL310_AUX_CTRL); 52 prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL); 53 54 /* 55 * Disable instruction prefetch 56 */ 57 prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH; 58 aux &= ~AUX_CTRL_INSTR_PREFETCH; 59 60 // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH; 61 // aux &= ~AUX_CTRL_DATA_PREFETCH; 62 63 /* 64 * Make sure data prefetch is on 65 */ 66 prefetch |= PREFETCH_CTRL_DATA_PREFETCH; 67 aux |= AUX_CTRL_DATA_PREFETCH; 68 69 /* 70 * TODO: add tunable for prefetch offset 71 * and experiment with performance 72 */ 73 74 ti_smc0(aux, 0, WRITE_AUXCTRL_REG); 75 ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG); 76 } 77 78 void 79 omap4_pl310_write_ctrl(platform_t plat, struct pl310_softc *sc, uint32_t val) 80 { 81 82 ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG); 83 } 84 85 void 86 omap4_pl310_write_debug(platform_t plat, struct pl310_softc *sc, uint32_t val) 87 { 88 89 ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG); 90 } 91