/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright 2010 Nathan Whitehorn
*
* 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.
*
* $FreeBSD$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <machine/md_var.h>
#include <machine/platform.h>
#include "ps3-hvcall.h"
#include "pic_if.h"
static void ps3pic_identify(driver_t *driver, device_t parent);
static int ps3pic_probe(device_t);
static int ps3pic_attach(device_t);
static void ps3pic_dispatch(device_t, struct trapframe *);
static void ps3pic_enable(device_t, u_int, u_int, void **);
static void ps3pic_eoi(device_t, u_int, void *);
static void ps3pic_ipi(device_t, u_int);
static void ps3pic_mask(device_t, u_int, void *);
static void ps3pic_unmask(device_t, u_int, void *);
struct ps3pic_softc {
volatile uint64_t *bitmap_thread0;
volatile uint64_t *mask_thread0;
volatile uint64_t *bitmap_thread1;
volatile uint64_t *mask_thread1;
uint64_t sc_ipi_outlet[2];
uint64_t sc_ipi_virq;
int sc_vector[64];
};
static device_method_t ps3pic_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, ps3pic_identify),
DEVMETHOD(device_probe, ps3pic_probe),
DEVMETHOD(device_attach, ps3pic_attach),
/* PIC interface */
DEVMETHOD(pic_dispatch, ps3pic_dispatch),
DEVMETHOD(pic_enable, ps3pic_enable),
DEVMETHOD(pic_eoi, ps3pic_eoi),
DEVMETHOD(pic_ipi, ps3pic_ipi),
DEVMETHOD(pic_mask, ps3pic_mask),
DEVMETHOD(pic_unmask, ps3pic_unmask),
{ 0, 0 },
};
static driver_t ps3pic_driver = {
"ps3pic",
ps3pic_methods,
sizeof(struct ps3pic_softc)
};
static devclass_t ps3pic_devclass;
DRIVER_MODULE(ps3pic, nexus, ps3pic_driver, ps3pic_devclass, 0, 0);
static MALLOC_DEFINE(M_PS3PIC, "ps3pic", "PS3 PIC");
static void
ps3pic_identify(driver_t *driver, device_t parent)
{
if (strcmp(installed_platform(), "ps3") != 0)
return;
if (device_find_child(parent, "ps3pic", -1) == NULL)
BUS_ADD_CHILD(parent, 0, "ps3pic", 0);
}
static int
ps3pic_probe(device_t dev)
{
device_set_desc(dev, "Playstation 3 interrupt controller");
return (BUS_PROBE_NOWILDCARD);
}
static int
ps3pic_attach(device_t dev)
{
struct ps3pic_softc *sc;
uint64_t ppe;
int thread;
sc = device_get_softc(dev);
sc->bitmap_thread0 = contigmalloc(128 /* 512 bits * 2 */, M_PS3PIC,
M_NOWAIT | M_ZERO, 0, BUS_SPACE_MAXADDR, 64 /* alignment */,
PAGE_SIZE /* boundary */);
sc->mask_thread0 = sc->bitmap_thread0 + 4;
sc->bitmap_thread1 = sc->bitmap_thread0 + 8;
sc->mask_thread1 = sc->bitmap_thread0 + 12;
lv1_get_logical_ppe_id(&ppe);
thread = 32 - fls(mfctrl());
lv1_configure_irq_state_bitmap(ppe, thread,
vtophys(sc->bitmap_thread0));
sc->sc_ipi_virq = 63;
#ifdef SMP
lv1_configure_irq_state_bitmap(ppe, !thread,
vtophys(sc->bitmap_thread1));
/* Map both IPIs to the same VIRQ to avoid changes in intr_machdep */
lv1_construct_event_receive_port(&sc->sc_ipi_outlet[0]);
lv1_connect_irq_plug_ext(ppe, thread, sc->sc_ipi_virq,
sc->sc_ipi_outlet[0], 0);
lv1_construct_event_receive_port(&sc->sc_ipi_outlet[1]);
lv1_connect_irq_plug_ext(ppe, !thread, sc->sc_ipi_virq,
sc->sc_ipi_outlet[1], 0);
#endif
powerpc_register_pic(dev, 0, sc->sc_ipi_virq, 1, FALSE);
return (0);
}
/*
* PIC I/F methods.
*/
static void
ps3pic_dispatch(device_t dev, struct trapframe *tf)
{
uint64_t bitmap, mask;
int irq;
struct ps3pic_softc *sc;
sc = device_get_softc(dev);
if (PCPU_GET(cpuid) == 0) {
bitmap = atomic_readandclear_64(&sc->bitmap_thread0[0]);
mask = sc->mask_thread0[0];
} else {
bitmap = atomic_readandclear_64(&sc->bitmap_thread1[0]);
mask = sc->mask_thread1[0];
}
powerpc_sync();
while ((irq = ffsl(bitmap & mask) - 1) != -1) {
bitmap &= ~(1UL << irq);
powerpc_dispatch_intr(sc->sc_vector[63 - irq], tf);
}
}
static void
ps3pic_enable(device_t dev, u_int irq, u_int vector, void **priv)
{
struct ps3pic_softc *sc;
sc = device_get_softc(dev);
sc->sc_vector[irq] = vector;
ps3pic_unmask(dev, irq, priv);
}
static void
ps3pic_eoi(device_t dev, u_int irq, void *priv)
{
uint64_t ppe;
int thread;
lv1_get_logical_ppe_id(&ppe);
thread = 32 - fls(mfctrl());
lv1_end_of_interrupt_ext(ppe, thread, irq);
}
static void
ps3pic_ipi(device_t dev, u_int cpu)
{
struct ps3pic_softc *sc;
sc = device_get_softc(dev);
lv1_send_event_locally(sc->sc_ipi_outlet[cpu]);
}
static void
ps3pic_mask(device_t dev, u_int irq, void *priv)
{
struct ps3pic_softc *sc;
uint64_t ppe;
sc = device_get_softc(dev);
/* Do not mask IPIs! */
if (irq == sc->sc_ipi_virq)
return;
atomic_clear_64(&sc->mask_thread0[0], 1UL << (63 - irq));
atomic_clear_64(&sc->mask_thread1[0], 1UL << (63 - irq));
lv1_get_logical_ppe_id(&ppe);
lv1_did_update_interrupt_mask(ppe, 0);
lv1_did_update_interrupt_mask(ppe, 1);
}
static void
ps3pic_unmask(device_t dev, u_int irq, void *priv)
{
struct ps3pic_softc *sc;
uint64_t ppe;
sc = device_get_softc(dev);
atomic_set_64(&sc->mask_thread0[0], 1UL << (63 - irq));
atomic_set_64(&sc->mask_thread1[0], 1UL << (63 - irq));
lv1_get_logical_ppe_id(&ppe);
lv1_did_update_interrupt_mask(ppe, 0);
lv1_did_update_interrupt_mask(ppe, 1);
}