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Add PL310 platform initialization for Armada 38x

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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
This commit is contained in:
zbb 2017-04-18 10:32:21 +00:00
parent 2f72ed7d5a
commit a12ea9b1d6
2 changed files with 75 additions and 0 deletions
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74
sys/arm/mv/armada38x/armada38x_pl310.c Normal file
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@ -0,0 +1,74 @@
/*-
* Copyright (c) 2017 Stormshield.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* The machine-dependent part of the arm/pl310 driver for Armada 38x SoCs.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <machine/bus.h>
#include <machine/pl310.h>
void
platform_pl310_init(struct pl310_softc *sc)
{
uint32_t reg;
/*
* Enable power saving modes:
* - Dynamic Gating stops the clock when the controller is idle.
*/
reg = pl310_read4(sc, PL310_POWER_CTRL);
reg |= POWER_CTRL_ENABLE_GATING;
pl310_write4(sc, PL310_POWER_CTRL, reg);
pl310_write4(sc, PL310_PREFETCH_CTRL, PREFETCH_CTRL_DL |
PREFETCH_CTRL_DATA_PREFETCH | PREFETCH_CTRL_INCR_DL |
PREFETCH_CTRL_DL_ON_WRAP);
}
void
platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
{
pl310_write4(sc, PL310_CTRL, val);
}
void
platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
{
pl310_write4(sc, PL310_DEBUG_CTRL, val);
}

1
sys/arm/mv/armada38x/files.armada38x
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@ -7,3 +7,4 @@ arm/mv/armada38x/armada38x.c standard
arm/mv/armada38x/armada38x_mp.c optional smp
arm/mv/armada38x/pmsu.c standard
arm/mv/armada38x/rtc.c standard
arm/mv/armada38x/armada38x_pl310.c optional pl310