75f48c23ea
This allows multiple instances of SoCs that use the pl310 driver to be built within the same kernel: * Add access to the platform_t object from outside platform.c * Use this with the pl310 driver There is a new platform_pl310 interface to replace the existing code. SoCs need to implement the init method, and if they have special requirements to write to the two registers we care about will also need to implement the write_ctrl and write_debug methods. Differential Revision: https://reviews.freebsd.org/D11546
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/*-
|
|
* Copyright (c) 2012 Olivier Houchard.
|
|
* 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 imx6 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>
|
|
#include <machine/platformvar.h>
|
|
|
|
#include <arm/freescale/imx/imx6_machdep.h>
|
|
|
|
#include "platform_pl310_if.h"
|
|
|
|
void
|
|
imx6_pl310_init(platform_t plat, struct pl310_softc *sc)
|
|
{
|
|
uint32_t reg;
|
|
|
|
/*
|
|
* Enable power saving modes:
|
|
* - Dynamic Gating stops the clock when the controller is idle.
|
|
* - Standby stops the clock when the cores are in WFI mode.
|
|
*/
|
|
reg = pl310_read4(sc, PL310_POWER_CTRL);
|
|
reg |= POWER_CTRL_ENABLE_GATING | POWER_CTRL_ENABLE_STANDBY;
|
|
pl310_write4(sc, PL310_POWER_CTRL, reg);
|
|
|
|
pl310_set_ram_latency(sc, PL310_TAG_RAM_CTRL, 4, 2, 3);
|
|
pl310_set_ram_latency(sc, PL310_DATA_RAM_CTRL, 4, 2, 3);
|
|
}
|