281 lines
6.9 KiB
C
281 lines
6.9 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* Copyright 2003 by Peter Grehan. 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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* A driver for the PIC found in the Heathrow/Paddington MacIO chips.
|
|
* This was superseded by an OpenPIC in the Keylargo and beyond
|
|
* MacIO versions.
|
|
*/
|
|
|
|
#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/rman.h>
|
|
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/openfirm.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/intr_machdep.h>
|
|
#include <machine/md_var.h>
|
|
#include <machine/pio.h>
|
|
#include <machine/resource.h>
|
|
|
|
#include <vm/vm.h>
|
|
#include <vm/pmap.h>
|
|
|
|
#include <powerpc/powermac/hrowpicvar.h>
|
|
|
|
#include "pic_if.h"
|
|
|
|
/*
|
|
* MacIO interface
|
|
*/
|
|
static int hrowpic_probe(device_t);
|
|
static int hrowpic_attach(device_t);
|
|
|
|
static void hrowpic_dispatch(device_t, struct trapframe *);
|
|
static void hrowpic_enable(device_t, u_int, u_int, void **);
|
|
static void hrowpic_eoi(device_t, u_int, void *);
|
|
static void hrowpic_ipi(device_t, u_int);
|
|
static void hrowpic_mask(device_t, u_int, void *);
|
|
static void hrowpic_unmask(device_t, u_int, void *);
|
|
|
|
static device_method_t hrowpic_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, hrowpic_probe),
|
|
DEVMETHOD(device_attach, hrowpic_attach),
|
|
|
|
/* PIC interface */
|
|
DEVMETHOD(pic_dispatch, hrowpic_dispatch),
|
|
DEVMETHOD(pic_enable, hrowpic_enable),
|
|
DEVMETHOD(pic_eoi, hrowpic_eoi),
|
|
DEVMETHOD(pic_ipi, hrowpic_ipi),
|
|
DEVMETHOD(pic_mask, hrowpic_mask),
|
|
DEVMETHOD(pic_unmask, hrowpic_unmask),
|
|
|
|
{ 0, 0 },
|
|
};
|
|
|
|
static driver_t hrowpic_driver = {
|
|
"hrowpic",
|
|
hrowpic_methods,
|
|
sizeof(struct hrowpic_softc)
|
|
};
|
|
|
|
DRIVER_MODULE(hrowpic, macio, hrowpic_driver, 0, 0);
|
|
|
|
static uint32_t
|
|
hrowpic_read_reg(struct hrowpic_softc *sc, u_int reg, u_int bank)
|
|
{
|
|
if (bank == HPIC_PRIMARY)
|
|
reg += HPIC_1ST_OFFSET;
|
|
|
|
return (bus_space_read_4(sc->sc_bt, sc->sc_bh, reg));
|
|
}
|
|
|
|
static void
|
|
hrowpic_write_reg(struct hrowpic_softc *sc, u_int reg, u_int bank,
|
|
uint32_t val)
|
|
{
|
|
|
|
if (bank == HPIC_PRIMARY)
|
|
reg += HPIC_1ST_OFFSET;
|
|
|
|
bus_space_write_4(sc->sc_bt, sc->sc_bh, reg, val);
|
|
|
|
/* XXX Issue a read to force the write to complete. */
|
|
bus_space_read_4(sc->sc_bt, sc->sc_bh, reg);
|
|
}
|
|
|
|
static int
|
|
hrowpic_probe(device_t dev)
|
|
{
|
|
const char *type = ofw_bus_get_type(dev);
|
|
|
|
/*
|
|
* OpenPIC cells have a type of "open-pic", so this
|
|
* is sufficient to identify a Heathrow cell
|
|
*/
|
|
if (strcmp(type, "interrupt-controller") != 0)
|
|
return (ENXIO);
|
|
|
|
/*
|
|
* The description was already printed out in the nexus
|
|
* probe, so don't do it again here
|
|
*/
|
|
device_set_desc(dev, "Heathrow MacIO interrupt controller");
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
hrowpic_attach(device_t dev)
|
|
{
|
|
struct hrowpic_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->sc_dev = dev;
|
|
|
|
sc->sc_rrid = 0;
|
|
sc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rrid,
|
|
RF_ACTIVE);
|
|
|
|
if (sc->sc_rres == NULL) {
|
|
device_printf(dev, "Could not alloc mem resource!\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
sc->sc_bt = rman_get_bustag(sc->sc_rres);
|
|
sc->sc_bh = rman_get_bushandle(sc->sc_rres);
|
|
|
|
/*
|
|
* Disable all interrupt sources and clear outstanding interrupts
|
|
*/
|
|
hrowpic_write_reg(sc, HPIC_ENABLE, HPIC_PRIMARY, 0);
|
|
hrowpic_write_reg(sc, HPIC_CLEAR, HPIC_PRIMARY, 0xffffffff);
|
|
hrowpic_write_reg(sc, HPIC_ENABLE, HPIC_SECONDARY, 0);
|
|
hrowpic_write_reg(sc, HPIC_CLEAR, HPIC_SECONDARY, 0xffffffff);
|
|
|
|
powerpc_register_pic(dev, ofw_bus_get_node(dev), 64, 0, FALSE);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Local routines
|
|
*/
|
|
|
|
static void
|
|
hrowpic_toggle_irq(struct hrowpic_softc *sc, int irq, int enable)
|
|
{
|
|
u_int roffset;
|
|
u_int rbit;
|
|
|
|
KASSERT((irq > 0) && (irq <= HROWPIC_IRQMAX), ("en irq out of range"));
|
|
|
|
/*
|
|
* Humor the SMP layer if it wants to set up an IPI handler.
|
|
*/
|
|
if (irq == HROWPIC_IRQMAX)
|
|
return;
|
|
|
|
/*
|
|
* Calculate prim/sec register bank for the IRQ, update soft copy,
|
|
* and enable the IRQ as an interrupt source
|
|
*/
|
|
roffset = HPIC_INT_TO_BANK(irq);
|
|
rbit = HPIC_INT_TO_REGBIT(irq);
|
|
|
|
if (enable)
|
|
sc->sc_softreg[roffset] |= (1 << rbit);
|
|
else
|
|
sc->sc_softreg[roffset] &= ~(1 << rbit);
|
|
|
|
hrowpic_write_reg(sc, HPIC_ENABLE, roffset, sc->sc_softreg[roffset]);
|
|
}
|
|
|
|
/*
|
|
* PIC I/F methods.
|
|
*/
|
|
|
|
static void
|
|
hrowpic_dispatch(device_t dev, struct trapframe *tf)
|
|
{
|
|
struct hrowpic_softc *sc;
|
|
uint64_t mask;
|
|
uint32_t reg;
|
|
u_int irq;
|
|
|
|
sc = device_get_softc(dev);
|
|
while (1) {
|
|
mask = hrowpic_read_reg(sc, HPIC_STATUS, HPIC_SECONDARY);
|
|
reg = hrowpic_read_reg(sc, HPIC_STATUS, HPIC_PRIMARY);
|
|
mask = (mask << 32) | reg;
|
|
if (mask == 0)
|
|
break;
|
|
|
|
irq = 0;
|
|
while (irq < HROWPIC_IRQMAX) {
|
|
if (mask & 1)
|
|
powerpc_dispatch_intr(sc->sc_vector[irq], tf);
|
|
mask >>= 1;
|
|
irq++;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
hrowpic_enable(device_t dev, u_int irq, u_int vector, void **priv __unused)
|
|
{
|
|
struct hrowpic_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
sc->sc_vector[irq] = vector;
|
|
hrowpic_toggle_irq(sc, irq, 1);
|
|
}
|
|
|
|
static void
|
|
hrowpic_eoi(device_t dev, u_int irq, void *priv __unused)
|
|
{
|
|
struct hrowpic_softc *sc;
|
|
int bank;
|
|
|
|
sc = device_get_softc(dev);
|
|
bank = (irq >= 32) ? HPIC_SECONDARY : HPIC_PRIMARY ;
|
|
hrowpic_write_reg(sc, HPIC_CLEAR, bank, 1U << (irq & 0x1f));
|
|
}
|
|
|
|
static void
|
|
hrowpic_ipi(device_t dev, u_int irq)
|
|
{
|
|
/* No SMP support. */
|
|
}
|
|
|
|
static void
|
|
hrowpic_mask(device_t dev, u_int irq, void *priv __unused)
|
|
{
|
|
struct hrowpic_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
hrowpic_toggle_irq(sc, irq, 0);
|
|
}
|
|
|
|
static void
|
|
hrowpic_unmask(device_t dev, u_int irq, void *priv __unused)
|
|
{
|
|
struct hrowpic_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
hrowpic_toggle_irq(sc, irq, 1);
|
|
}
|