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/types.h> 28 #include <sys/param.h> 29 #include <sys/systm.h> 30 #include <sys/bus.h> 31 #include <sys/rman.h> 32 #include <sys/lock.h> 33 #include <sys/mutex.h> 34 35 #include <machine/bus.h> 36 #include <machine/pl310.h> 37 #include <machine/platformvar.h> 38 39 #include <arm/ti/ti_smc.h> 40 #include <arm/ti/omap4/omap4_machdep.h> 41 #include <arm/ti/omap4/omap4_smc.h> 42 43 #include "platform_pl310_if.h" 44 45 void 46 omap4_pl310_init(platform_t plat, struct pl310_softc *sc) 47 { 48 uint32_t aux, prefetch; 49 50 aux = pl310_read4(sc, PL310_AUX_CTRL); 51 prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL); 52 53 /* 54 * Disable instruction prefetch 55 */ 56 prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH; 57 aux &= ~AUX_CTRL_INSTR_PREFETCH; 58 59 // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH; 60 // aux &= ~AUX_CTRL_DATA_PREFETCH; 61 62 /* 63 * Make sure data prefetch is on 64 */ 65 prefetch |= PREFETCH_CTRL_DATA_PREFETCH; 66 aux |= AUX_CTRL_DATA_PREFETCH; 67 68 /* 69 * TODO: add tunable for prefetch offset 70 * and experiment with performance 71 */ 72 73 ti_smc0(aux, 0, WRITE_AUXCTRL_REG); 74 ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG); 75 } 76 77 void 78 omap4_pl310_write_ctrl(platform_t plat, struct pl310_softc *sc, uint32_t val) 79 { 80 81 ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG); 82 } 83 84 void 85 omap4_pl310_write_debug(platform_t plat, struct pl310_softc *sc, uint32_t val) 86 { 87 88 ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG); 89 } 90