cca48a59de
implementations. Early in the boot the kernel will use an approximate, however after the timer has been probed it will switch to a more accurate implementation. Reviewed by: manu Sponsored by: ABT Systems Ltd Differential Revision: https://reviews.freebsd.org/D5762
158 lines
4.1 KiB
C
158 lines
4.1 KiB
C
/*-
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* Copyright (c) 2012 Oleksandr Tymoshenko.
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* Copyright (c) 1994-1998 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45
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*/
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#include "opt_ddb.h"
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#include "opt_platform.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#define _ARM32_BUS_DMA_PRIVATE
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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/devmap.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/bus.h>
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#include <machine/machdep.h>
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#include <machine/platform.h>
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#include <machine/platformvar.h>
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#include <dev/fdt/fdt_common.h>
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#include <arm/broadcom/bcm2835/bcm2835_wdog.h>
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#include "platform_if.h"
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static vm_offset_t
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bcm2835_lastaddr(platform_t plat)
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{
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return (devmap_lastaddr());
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}
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static void
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bcm2835_late_init(platform_t plat)
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{
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phandle_t system;
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pcell_t cells[2];
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int len;
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system = OF_finddevice("/system");
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if (system != 0) {
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len = OF_getprop(system, "linux,serial", &cells, sizeof(cells));
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if (len > 0)
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board_set_serial(fdt64_to_cpu(*((uint64_t *)cells)));
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len = OF_getprop(system, "linux,revision", &cells, sizeof(cells));
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if (len > 0)
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board_set_revision(fdt32_to_cpu(*((uint32_t *)cells)));
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}
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}
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#ifdef SOC_BCM2835
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/*
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* Set up static device mappings.
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* All on-chip peripherals exist in a 16MB range starting at 0x20000000.
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* Map the entire range using 1MB section mappings.
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*/
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static int
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bcm2835_devmap_init(platform_t plat)
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{
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devmap_add_entry(0x20000000, 0x01000000);
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return (0);
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}
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#endif
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#ifdef SOC_BCM2836
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static int
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bcm2836_devmap_init(platform_t plat)
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{
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devmap_add_entry(0x3f000000, 0x01000000);
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return (0);
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}
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#endif
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struct arm32_dma_range *
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bus_dma_get_range(void)
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{
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return (NULL);
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}
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int
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bus_dma_get_range_nb(void)
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{
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return (0);
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}
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void
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cpu_reset()
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{
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bcmwd_watchdog_reset();
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while (1);
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}
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#ifdef SOC_BCM2835
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static platform_method_t bcm2835_methods[] = {
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PLATFORMMETHOD(platform_devmap_init, bcm2835_devmap_init),
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PLATFORMMETHOD(platform_lastaddr, bcm2835_lastaddr),
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PLATFORMMETHOD(platform_late_init, bcm2835_late_init),
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PLATFORMMETHOD_END,
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};
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FDT_PLATFORM_DEF(bcm2835, "bcm2835", 0, "raspberrypi,model-b", 0);
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#endif
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#ifdef SOC_BCM2836
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static platform_method_t bcm2836_methods[] = {
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PLATFORMMETHOD(platform_devmap_init, bcm2836_devmap_init),
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PLATFORMMETHOD(platform_lastaddr, bcm2835_lastaddr),
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PLATFORMMETHOD(platform_late_init, bcm2835_late_init),
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PLATFORMMETHOD_END,
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};
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FDT_PLATFORM_DEF(bcm2836, "bcm2836", 0, "brcm,bcm2709", 0);
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#endif
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