1 /*- 2 * Copyright (c) 2012 Olivier Houchard. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #include <sys/cdefs.h> 26 __FBSDID("$FreeBSD$"); 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 <arm/ti/ti_smc.h> 36 #include <arm/ti/omap4/omap4_smc.h> 37 #include <machine/bus.h> 38 #include <machine/pl310.h> 39 40 void 41 platform_pl310_init(struct pl310_softc *sc) 42 { 43 uint32_t aux, prefetch; 44 45 aux = pl310_read4(sc, PL310_AUX_CTRL); 46 prefetch = pl310_read4(sc, PL310_PREFETCH_CTRL); 47 48 /* 49 * Disable instruction prefetch 50 */ 51 prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH; 52 aux &= ~AUX_CTRL_INSTR_PREFETCH; 53 54 // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH; 55 // aux &= ~AUX_CTRL_DATA_PREFETCH; 56 57 /* 58 * Make sure data prefetch is on 59 */ 60 prefetch |= PREFETCH_CTRL_DATA_PREFETCH; 61 aux |= AUX_CTRL_DATA_PREFETCH; 62 63 /* 64 * TODO: add tunable for prefetch offset 65 * and experiment with performance 66 */ 67 68 ti_smc0(aux, 0, WRITE_AUXCTRL_REG); 69 ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG); 70 } 71 72 void 73 platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val) 74 { 75 ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG); 76 } 77 78 void 79 platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val) 80 { 81 ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG); 82 } 83