302acc2e5f
add actual platform probing based on PVR. Still needs a little more work: in particular, the CCRS setup should move here. Also turn "bare" into a truly bare platform that doesn't pretend to know how to do anything except get the memory map. This should also be enhanced to process the FDT reserved memory list, but that is for another day.
161 lines
3.8 KiB
C
161 lines
3.8 KiB
C
/*-
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* Copyright (c) 2008-2012 Semihalf.
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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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*
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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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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/smp.h>
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#include <dev/ofw/openfirm.h>
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#include <machine/platform.h>
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#include <machine/platformvar.h>
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#include "platform_if.h"
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extern uint32_t *bootinfo;
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static int bare_probe(platform_t);
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static void bare_mem_regions(platform_t, struct mem_region **phys, int *physsz,
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struct mem_region **avail, int *availsz);
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static u_long bare_timebase_freq(platform_t, struct cpuref *cpuref);
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static void bare_reset(platform_t);
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static platform_method_t bare_methods[] = {
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PLATFORMMETHOD(platform_probe, bare_probe),
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PLATFORMMETHOD(platform_mem_regions, bare_mem_regions),
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PLATFORMMETHOD(platform_timebase_freq, bare_timebase_freq),
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PLATFORMMETHOD(platform_reset, bare_reset),
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PLATFORMMETHOD_END
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};
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static platform_def_t bare_platform = {
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"bare",
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bare_methods,
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0
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};
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PLATFORM_DEF(bare_platform);
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static int
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bare_probe(platform_t plat)
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{
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if (OF_peer(0) == -1) /* Needs device tree to work */
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return (ENXIO);
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return (BUS_PROBE_GENERIC);
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}
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void
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bare_mem_regions(platform_t plat, struct mem_region **phys, int *physsz,
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struct mem_region **avail, int *availsz)
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{
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ofw_mem_regions(phys, physsz, avail, availsz);
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}
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static u_long
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bare_timebase_freq(platform_t plat, struct cpuref *cpuref)
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{
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u_long ticks;
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phandle_t cpus, child;
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pcell_t freq;
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if (bootinfo != NULL) {
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if (bootinfo[0] == 1) {
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/* Backward compatibility. See 8-STABLE. */
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ticks = bootinfo[3] >> 3;
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} else {
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/* Compatibility with Juniper's loader. */
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ticks = bootinfo[5] >> 3;
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}
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} else
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ticks = 0;
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if ((cpus = OF_finddevice("/cpus")) == -1)
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goto out;
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if ((child = OF_child(cpus)) == 0)
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goto out;
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switch (OF_getproplen(child, "timebase-frequency")) {
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case 4:
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{
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uint32_t tbase;
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OF_getprop(child, "timebase-frequency", &tbase, sizeof(tbase));
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ticks = tbase;
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return (ticks);
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}
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case 8:
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{
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uint64_t tbase;
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OF_getprop(child, "timebase-frequency", &tbase, sizeof(tbase));
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ticks = tbase;
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return (ticks);
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}
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default:
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break;
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}
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freq = 0;
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if (OF_getprop(child, "bus-frequency", (void *)&freq,
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sizeof(freq)) <= 0)
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goto out;
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/*
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* Time Base and Decrementer are updated every 8 CCB bus clocks.
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* HID0[SEL_TBCLK] = 0
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*/
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if (freq != 0)
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ticks = freq / 8;
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out:
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if (ticks <= 0)
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panic("Unable to determine timebase frequency!");
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return (ticks);
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}
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static void
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bare_reset(platform_t plat)
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{
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printf("Reset failed...\n");
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while (1)
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;
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}
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