sys/arm/ti/omap4/omap4_l2cache.c

   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         if (bootverbose) {
  49                 device_printf(sc->sc_dev, "Early BRESP response: %s\n",
  50                         (aux & AUX_CTRL_EARLY_BRESP) ? "enabled" : "disabled");
  51                 device_printf(sc->sc_dev, "Instruction prefetch: %s\n",
  52                         (aux & AUX_CTRL_INSTR_PREFETCH) ? "enabled" : "disabled");
  53                 device_printf(sc->sc_dev, "Data prefetch: %s\n",
  54                         (aux & AUX_CTRL_DATA_PREFETCH) ? "enabled" : "disabled");
  55                 device_printf(sc->sc_dev, "Non-secure interrupt control: %s\n",
  56                         (aux & AUX_CTRL_NS_INT_CTRL) ? "enabled" : "disabled");
  57                 device_printf(sc->sc_dev, "Non-secure lockdown: %s\n",
  58                         (aux & AUX_CTRL_NS_LOCKDOWN) ? "enabled" : "disabled");
  59                 device_printf(sc->sc_dev, "Share override: %s\n",
  60                         (aux & AUX_CTRL_SHARE_OVERRIDE) ? "enabled" : "disabled");
  61
  62                 device_printf(sc->sc_dev, "Double linefil: %s\n",
  63                         (prefetch & PREFETCH_CTRL_DL) ? "enabled" : "disabled");
  64                 device_printf(sc->sc_dev, "Instruction prefetch: %s\n",
  65                         (prefetch & PREFETCH_CTRL_INSTR_PREFETCH) ? "enabled" : "disabled");
  66                 device_printf(sc->sc_dev, "Data prefetch: %s\n",
  67                         (prefetch & PREFETCH_CTRL_DATA_PREFETCH) ? "enabled" : "disabled");
  68                 device_printf(sc->sc_dev, "Double linefill on WRAP request: %s\n",
  69                         (prefetch & PREFETCH_CTRL_DL_ON_WRAP) ? "enabled" : "disabled");
  70                 device_printf(sc->sc_dev, "Prefetch drop: %s\n",
  71                         (prefetch & PREFETCH_CTRL_PREFETCH_DROP) ? "enabled" : "disabled");
  72                 device_printf(sc->sc_dev, "Incr double Linefill: %s\n",
  73                         (prefetch & PREFETCH_CTRL_INCR_DL) ? "enabled" : "disabled");
  74                 device_printf(sc->sc_dev, "Not same ID on exclusive sequence: %s\n",
  75                         (prefetch & PREFETCH_CTRL_NOTSAMEID) ? "enabled" : "disabled");
  76                 device_printf(sc->sc_dev, "Prefetch offset: %d\n",
  77                         (prefetch & PREFETCH_CTRL_OFFSET_MASK));
  78         }
  79
  80         /*
  81          * Disable instruction prefetch
  82          */
  83         prefetch &= ~PREFETCH_CTRL_INSTR_PREFETCH;
  84         aux &= ~AUX_CTRL_INSTR_PREFETCH;
  85
  86         // prefetch &= ~PREFETCH_CTRL_DATA_PREFETCH;
  87         // aux &= ~AUX_CTRL_DATA_PREFETCH;
  88
  89         /*
  90          * Make sure data prefetch is on
  91          */
  92         prefetch |= PREFETCH_CTRL_DATA_PREFETCH;
  93         aux |= AUX_CTRL_DATA_PREFETCH;
  94
  95         /*
  96          * TODO: add tunable for prefetch offset
  97          * and experiment with performance
  98          */
  99
 100         ti_smc0(aux, 0, WRITE_AUXCTRL_REG);
 101         ti_smc0(prefetch, 0, WRITE_PREFETCH_CTRL_REG);
 102 }
 103
 104 void
 105 platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
 106 {
 107         ti_smc0(val, 0, L2CACHE_WRITE_CTRL_REG);
 108 }
 109
 110 void
 111 platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
 112 {
 113         ti_smc0(val, 0, L2CACHE_WRITE_DEBUG_REG);
 114 }