freebsd-dev/sys/arm/broadcom/bcm2835/bcm2835_machdep.c
2020-09-01 21:17:24 +00:00

157 lines
4.7 KiB
C

/*-
* SPDX-License-Identifier: BSD-4-Clause
*
* Copyright (c) 2012 Oleksandr Tymoshenko.
* Copyright (c) 1994-1998 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* All rights reserved.
*
* This code is derived from software written for Brini by Mark Brinicombe
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``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 BRINI OR CONTRIBUTORS 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.
*
* from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
*/
#include "opt_ddb.h"
#include "opt_platform.h"
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/devmap.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/machdep.h>
#include <machine/platform.h>
#include <machine/platformvar.h>
#include <dev/ofw/openfirm.h>
#include <arm/broadcom/bcm2835/bcm2835_wdog.h>
#include <arm/broadcom/bcm2835/bcm2836_mp.h>
#include "platform_if.h"
#ifdef SOC_BCM2835
static platform_devmap_init_t bcm2835_devmap_init;
#endif
#ifdef SOC_BCM2836
static platform_devmap_init_t bcm2836_devmap_init;
#endif
static platform_late_init_t bcm2835_late_init;
static platform_cpu_reset_t bcm2835_cpu_reset;
static void
bcm2835_late_init(platform_t plat)
{
phandle_t system;
pcell_t cells[2];
int len;
system = OF_finddevice("/system");
if (system != -1) {
len = OF_getencprop(system, "linux,serial", cells,
sizeof(cells));
if (len > 0)
board_set_serial(((uint64_t)cells[0]) << 32 | cells[1]);
len = OF_getencprop(system, "linux,revision", cells,
sizeof(cells));
if (len > 0)
board_set_revision(cells[0]);
}
}
#ifdef SOC_BCM2835
/*
* Set up static device mappings.
* All on-chip peripherals exist in a 16MB range starting at 0x20000000.
* Map the entire range using 1MB section mappings.
*/
static int
bcm2835_devmap_init(platform_t plat)
{
devmap_add_entry(0x20000000, 0x01000000);
return (0);
}
#endif
#ifdef SOC_BCM2836
static int
bcm2836_devmap_init(platform_t plat)
{
devmap_add_entry(0x3f000000, 0x01000000);
return (0);
}
#endif
static void
bcm2835_cpu_reset(platform_t plat)
{
bcmwd_watchdog_reset();
}
#ifdef SOC_BCM2835
static platform_method_t bcm2835_methods[] = {
PLATFORMMETHOD(platform_devmap_init, bcm2835_devmap_init),
PLATFORMMETHOD(platform_late_init, bcm2835_late_init),
PLATFORMMETHOD(platform_cpu_reset, bcm2835_cpu_reset),
PLATFORMMETHOD_END,
};
FDT_PLATFORM_DEF2(bcm2835, bcm2835_legacy, "bcm2835 (legacy)", 0, "raspberrypi,model-b", 100);
FDT_PLATFORM_DEF2(bcm2835, bcm2835, "bcm2835", 0, "brcm,bcm2835", 100);
#endif
#if defined(SOC_BCM2836) || defined(SOC_BRCM_BCM2837)
static platform_method_t bcm2836_methods[] = {
PLATFORMMETHOD(platform_devmap_init, bcm2836_devmap_init),
PLATFORMMETHOD(platform_late_init, bcm2835_late_init),
PLATFORMMETHOD(platform_cpu_reset, bcm2835_cpu_reset),
#ifdef SMP
PLATFORMMETHOD(platform_mp_start_ap, bcm2836_mp_start_ap),
PLATFORMMETHOD(platform_mp_setmaxid, bcm2836_mp_setmaxid),
#endif
PLATFORMMETHOD_END,
};
FDT_PLATFORM_DEF2(bcm2836, bcm2836_legacy, "bcm2836 (legacy)", 0, "brcm,bcm2709", 100);
FDT_PLATFORM_DEF2(bcm2836, bcm2836, "bcm2836", 0, "brcm,bcm2836", 100);
FDT_PLATFORM_DEF2(bcm2836, bcm2837, "bcm2837", 0, "brcm,bcm2837", 100);
#endif /* defined(SOC_BCM2836) || defined(SOC_BRCM_BCM2837) */