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/*-
* Copyright (c) 2005 Peter Grehan
* Copyright (c) 2009 Nathan Whitehorn
* 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 AND CONTRIBUTORS ``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 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Dispatch platform calls to the appropriate platform implementation
* through a previously registered kernel object.
*/
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/ktr.h>
#include <sys/mutex.h>
#include <sys/rman.h>
#include <sys/systm.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <vm/vm.h>
#include <vm/vm_page.h>
#include <machine/bus_dma.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/machdep.h>
#include <machine/md_var.h>
#include <machine/platform.h>
#include <machine/platformvar.h>
#include <machine/smp.h>
#include "platform_if.h"
static platform_def_t *plat_def_impl;
static platform_t plat_obj;
static struct kobj_ops plat_kernel_kops;
static struct platform_kobj plat_kernel_obj;
static char plat_name[64];
SYSCTL_STRING(_hw, OID_AUTO, platform, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, plat_name, 0,
"Platform currently in use");
/*
* Platform install routines. Highest priority wins, using the same
* algorithm as bus attachment.
*/
SET_DECLARE(platform_set, platform_def_t);
static delay_func platform_delay;
platform_t
platform_obj(void)
{
return (plat_obj);
}
void
platform_probe_and_attach(void)
{
platform_def_t **platpp, *platp;
int prio, best_prio;
plat_obj = &plat_kernel_obj;
best_prio = 0;
/*
* We are unable to use TUNABLE_STR as the read will happen
* well after this function has returned.
*/
TUNABLE_STR_FETCH("hw.platform", plat_name, sizeof(plat_name));
/*
* Try to locate the best platform kobj
*/
SET_FOREACH(platpp, platform_set) {
platp = *platpp;
/*
* Take care of compiling the selected class, and
* then statically initialise the MMU object
*/
kobj_class_compile_static((kobj_class_t)platp,
&plat_kernel_kops);
kobj_init_static((kobj_t)plat_obj, (kobj_class_t)platp);
plat_obj->cls = platp;
prio = PLATFORM_PROBE(plat_obj);
/* Check for errors */
if (prio > 0)
continue;
/*
* Check if this module was specifically requested through
* the loader tunable we provide.
*/
if (strcmp(platp->name,plat_name) == 0) {
plat_def_impl = platp;
break;
}
/* Otherwise, see if it is better than our current best */
if (plat_def_impl == NULL || prio > best_prio) {
best_prio = prio;
plat_def_impl = platp;
}
/*
* We can't free the KOBJ, since it is static. Reset the ops
* member of this class so that we can come back later.
*/
platp->ops = NULL;
}
if (plat_def_impl == NULL)
panic("No platform module found!");
/*
* Recompile to make sure we ended with the
* correct one, and then attach.
*/
kobj_class_compile_static((kobj_class_t)plat_def_impl,
&plat_kernel_kops);
kobj_init_static((kobj_t)plat_obj, (kobj_class_t)plat_def_impl);
strlcpy(plat_name, plat_def_impl->name, sizeof(plat_name));
/* Set a default delay function */
arm_set_delay(platform_delay, NULL);
PLATFORM_ATTACH(plat_obj);
}
int
platform_devmap_init(void)
{
return PLATFORM_DEVMAP_INIT(plat_obj);
}
vm_offset_t
platform_lastaddr(void)
{
return PLATFORM_LASTADDR(plat_obj);
}
void
platform_gpio_init(void)
{
PLATFORM_GPIO_INIT(plat_obj);
}
void
platform_late_init(void)
{
PLATFORM_LATE_INIT(plat_obj);
}
void
cpu_reset(void)
{
PLATFORM_CPU_RESET(plat_obj);
printf("cpu_reset failed");
intr_disable();
while(1) {
cpu_sleep(0);
}
}
static void
platform_delay(int usec, void *arg __unused)
{
int counts;
for (; usec > 0; usec--)
for (counts = plat_obj->cls->delay_count; counts > 0; counts--)
/*
* Prevent the compiler from optimizing
* out the loop
*/
cpufunc_nullop();
}
#if defined(SMP)
void
platform_mp_setmaxid(void)
{
int ncpu;
PLATFORM_MP_SETMAXID(plat_obj);
if (TUNABLE_INT_FETCH("hw.ncpu", &ncpu)) {
if (ncpu >= 1 && ncpu <= mp_ncpus) {
mp_ncpus = ncpu;
mp_maxid = ncpu - 1;
}
}
}
void
platform_mp_start_ap(void)
{
PLATFORM_MP_START_AP(plat_obj);
}
#endif
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