1 /*- 2 * Copyright (c) 2017 Stormshield. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 /* 28 * The machine-dependent part of the arm/pl310 driver for Armada 38x SoCs. 29 */ 30 31 #include <sys/types.h> 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/rman.h> 36 #include <sys/lock.h> 37 #include <sys/mutex.h> 38 39 #include <machine/bus.h> 40 #include <machine/pl310.h> 41 #include <machine/platform.h> 42 #include <machine/platformvar.h> 43 44 #include "armada38x_pl310.h" 45 #include "platform_pl310_if.h" 46 47 void 48 mv_a38x_platform_pl310_init(platform_t plat, struct pl310_softc *sc) 49 { 50 uint32_t reg; 51 52 /* 53 * Enable power saving modes: 54 * - Dynamic Gating stops the clock when the controller is idle. 55 */ 56 reg = pl310_read4(sc, PL310_POWER_CTRL); 57 reg |= POWER_CTRL_ENABLE_GATING; 58 pl310_write4(sc, PL310_POWER_CTRL, reg); 59 60 pl310_write4(sc, PL310_PREFETCH_CTRL, PREFETCH_CTRL_DL | 61 PREFETCH_CTRL_DATA_PREFETCH | PREFETCH_CTRL_INCR_DL | 62 PREFETCH_CTRL_DL_ON_WRAP); 63 64 /* Disable L2 cache sync for IO coherent operation */ 65 sc->sc_io_coherent = true; 66 } 67 68 void 69 mv_a38x_platform_pl310_write_ctrl(platform_t plat, struct pl310_softc *sc, uint32_t val) 70 { 71 72 pl310_write4(sc, PL310_CTRL, val); 73 } 74 75 void 76 mv_a38x_platform_pl310_write_debug(platform_t plat, struct pl310_softc *sc, uint32_t val) 77 { 78 79 pl310_write4(sc, PL310_DEBUG_CTRL, val); 80 } 81