06918748e5
Introduce machine-dependent part of the arm/pl310 driver for Armada 38x SoCs. Add prefetch and power savings configuration. Submitted by: <arnaud.ysmal@stormshield.eu> Obtained from: Stormshield Sponsored by: Stormshield Differential revision: https://reviews.freebsd.org/D10220
75 lines
2.3 KiB
C
75 lines
2.3 KiB
C
/*-
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* Copyright (c) 2017 Stormshield.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* The machine-dependent part of the arm/pl310 driver for Armada 38x SoCs.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/pl310.h>
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void
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platform_pl310_init(struct pl310_softc *sc)
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{
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uint32_t reg;
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/*
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* Enable power saving modes:
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* - Dynamic Gating stops the clock when the controller is idle.
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*/
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reg = pl310_read4(sc, PL310_POWER_CTRL);
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reg |= POWER_CTRL_ENABLE_GATING;
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pl310_write4(sc, PL310_POWER_CTRL, reg);
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pl310_write4(sc, PL310_PREFETCH_CTRL, PREFETCH_CTRL_DL |
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PREFETCH_CTRL_DATA_PREFETCH | PREFETCH_CTRL_INCR_DL |
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PREFETCH_CTRL_DL_ON_WRAP);
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}
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void
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platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
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{
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pl310_write4(sc, PL310_CTRL, val);
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}
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void
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platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
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{
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pl310_write4(sc, PL310_DEBUG_CTRL, val);
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}
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