freebsd-dev/sys/powerpc/booke/platform_bare.c
Nathan Whitehorn c1cb22d755 Rearchitect platform memory map parsing to make it less
Open Firmware-centric:
- Keep the static list of regions in platform.c instead of ofw_machdep.c
- Move various merging and sorting operations to platform.c as well
- Move apple_hacks code out of ofw_machdep.c and into platform_powermac.c,
  where it belongs
- Move CHRP-specific dynamic-reconfiguration memory parsing into
  platform_chrp.c instead of pretending it is shared code
2013-12-01 19:43:15 +00:00

161 lines
3.8 KiB
C

/*-
* Copyright (c) 2008-2012 Semihalf.
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/pcpu.h>
#include <sys/proc.h>
#include <sys/smp.h>
#include <dev/ofw/openfirm.h>
#include <machine/platform.h>
#include <machine/platformvar.h>
#include "platform_if.h"
extern uint32_t *bootinfo;
static int bare_probe(platform_t);
static void bare_mem_regions(platform_t, struct mem_region *phys, int *physsz,
struct mem_region *avail, int *availsz);
static u_long bare_timebase_freq(platform_t, struct cpuref *cpuref);
static void bare_reset(platform_t);
static platform_method_t bare_methods[] = {
PLATFORMMETHOD(platform_probe, bare_probe),
PLATFORMMETHOD(platform_mem_regions, bare_mem_regions),
PLATFORMMETHOD(platform_timebase_freq, bare_timebase_freq),
PLATFORMMETHOD(platform_reset, bare_reset),
PLATFORMMETHOD_END
};
static platform_def_t bare_platform = {
"bare",
bare_methods,
0
};
PLATFORM_DEF(bare_platform);
static int
bare_probe(platform_t plat)
{
if (OF_peer(0) == -1) /* Needs device tree to work */
return (ENXIO);
return (BUS_PROBE_GENERIC);
}
void
bare_mem_regions(platform_t plat, struct mem_region *phys, int *physsz,
struct mem_region *avail, int *availsz)
{
ofw_mem_regions(phys, physsz, avail, availsz);
}
static u_long
bare_timebase_freq(platform_t plat, struct cpuref *cpuref)
{
u_long ticks;
phandle_t cpus, child;
pcell_t freq;
if (bootinfo != NULL) {
if (bootinfo[0] == 1) {
/* Backward compatibility. See 8-STABLE. */
ticks = bootinfo[3] >> 3;
} else {
/* Compatibility with Juniper's loader. */
ticks = bootinfo[5] >> 3;
}
} else
ticks = 0;
if ((cpus = OF_finddevice("/cpus")) == -1)
goto out;
if ((child = OF_child(cpus)) == 0)
goto out;
switch (OF_getproplen(child, "timebase-frequency")) {
case 4:
{
uint32_t tbase;
OF_getprop(child, "timebase-frequency", &tbase, sizeof(tbase));
ticks = tbase;
return (ticks);
}
case 8:
{
uint64_t tbase;
OF_getprop(child, "timebase-frequency", &tbase, sizeof(tbase));
ticks = tbase;
return (ticks);
}
default:
break;
}
freq = 0;
if (OF_getprop(child, "bus-frequency", (void *)&freq,
sizeof(freq)) <= 0)
goto out;
/*
* Time Base and Decrementer are updated every 8 CCB bus clocks.
* HID0[SEL_TBCLK] = 0
*/
if (freq != 0)
ticks = freq / 8;
out:
if (ticks <= 0)
panic("Unable to determine timebase frequency!");
return (ticks);
}
static void
bare_reset(platform_t plat)
{
printf("Reset failed...\n");
while (1)
;
}