af3dc4a7ca
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
313 lines
7.3 KiB
C
313 lines
7.3 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2012, 2013 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Oleksandr Rybalko under sponsorship
|
|
* from the FreeBSD Foundation.
|
|
*
|
|
* 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("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/module.h>
|
|
#include <sys/rman.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/intr.h>
|
|
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <arm/freescale/imx/imx51_tzicreg.h>
|
|
|
|
#include "pic_if.h"
|
|
|
|
#define TZIC_NIRQS 128
|
|
|
|
struct tzic_irqsrc {
|
|
struct intr_irqsrc isrc;
|
|
u_int irq;
|
|
};
|
|
|
|
struct tzic_softc {
|
|
device_t dev;
|
|
struct resource *tzicregs;
|
|
struct tzic_irqsrc isrcs[TZIC_NIRQS];
|
|
};
|
|
|
|
static struct tzic_softc *tzic_sc;
|
|
|
|
static inline uint32_t
|
|
tzic_read_4(struct tzic_softc *sc, int reg)
|
|
{
|
|
|
|
return (bus_read_4(sc->tzicregs, reg));
|
|
}
|
|
|
|
static inline void
|
|
tzic_write_4(struct tzic_softc *sc, int reg, uint32_t val)
|
|
{
|
|
|
|
bus_write_4(sc->tzicregs, reg, val);
|
|
}
|
|
|
|
static inline void
|
|
tzic_irq_eoi(struct tzic_softc *sc)
|
|
{
|
|
|
|
tzic_write_4(sc, TZIC_PRIOMASK, 0xff);
|
|
}
|
|
|
|
static inline void
|
|
tzic_irq_mask(struct tzic_softc *sc, u_int irq)
|
|
{
|
|
|
|
tzic_write_4(sc, TZIC_ENCLEAR(irq >> 5), (1u << (irq & 0x1f)));
|
|
}
|
|
|
|
static inline void
|
|
tzic_irq_unmask(struct tzic_softc *sc, u_int irq)
|
|
{
|
|
|
|
tzic_write_4(sc, TZIC_ENSET(irq >> 5), (1u << (irq & 0x1f)));
|
|
}
|
|
|
|
static int
|
|
tzic_intr(void *arg)
|
|
{
|
|
struct tzic_softc *sc = arg;
|
|
int b, i, irq;
|
|
uint32_t pending;
|
|
|
|
/* Get active interrupt */
|
|
for (i = 0; i < TZIC_NIRQS / 32; ++i) {
|
|
pending = tzic_read_4(sc, TZIC_PND(i));
|
|
if ((b = 31 - __builtin_clz(pending)) < 0)
|
|
continue;
|
|
irq = i * 32 + b;
|
|
tzic_write_4(sc, TZIC_PRIOMASK, 0);
|
|
if (intr_isrc_dispatch(&sc->isrcs[irq].isrc,
|
|
curthread->td_intr_frame) != 0) {
|
|
tzic_irq_mask(sc, irq);
|
|
tzic_irq_eoi(sc);
|
|
arm_irq_memory_barrier(irq);
|
|
if (bootverbose) {
|
|
device_printf(sc->dev,
|
|
"Stray irq %u disabled\n", irq);
|
|
}
|
|
}
|
|
return (FILTER_HANDLED);
|
|
}
|
|
|
|
if (bootverbose)
|
|
device_printf(sc->dev, "Spurious interrupt detected\n");
|
|
|
|
return (FILTER_HANDLED);
|
|
}
|
|
|
|
static void
|
|
tzic_enable_intr(device_t dev, struct intr_irqsrc *isrc)
|
|
{
|
|
u_int irq = ((struct tzic_irqsrc *)isrc)->irq;
|
|
struct tzic_softc *sc = device_get_softc(dev);
|
|
|
|
arm_irq_memory_barrier(irq);
|
|
tzic_irq_unmask(sc, irq);
|
|
}
|
|
|
|
static void
|
|
tzic_disable_intr(device_t dev, struct intr_irqsrc *isrc)
|
|
{
|
|
u_int irq = ((struct tzic_irqsrc *)isrc)->irq;
|
|
struct tzic_softc *sc = device_get_softc(dev);
|
|
|
|
tzic_irq_mask(sc, irq);
|
|
}
|
|
|
|
static int
|
|
tzic_map_intr(device_t dev, struct intr_map_data *data,
|
|
struct intr_irqsrc **isrcp)
|
|
{
|
|
struct intr_map_data_fdt *daf;
|
|
struct tzic_softc *sc;
|
|
|
|
if (data->type != INTR_MAP_DATA_FDT)
|
|
return (ENOTSUP);
|
|
|
|
daf = (struct intr_map_data_fdt *)data;
|
|
if (daf->ncells != 1 || daf->cells[0] >= TZIC_NIRQS)
|
|
return (EINVAL);
|
|
|
|
sc = device_get_softc(dev);
|
|
*isrcp = &sc->isrcs[daf->cells[0]].isrc;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
tzic_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
|
|
{
|
|
struct tzic_softc *sc = device_get_softc(dev);
|
|
|
|
tzic_irq_mask(sc, ((struct tzic_irqsrc *)isrc)->irq);
|
|
tzic_irq_eoi(sc);
|
|
}
|
|
|
|
static void
|
|
tzic_post_ithread(device_t dev, struct intr_irqsrc *isrc)
|
|
{
|
|
|
|
tzic_enable_intr(dev, isrc);
|
|
}
|
|
|
|
static void
|
|
tzic_post_filter(device_t dev, struct intr_irqsrc *isrc)
|
|
{
|
|
|
|
tzic_irq_eoi(device_get_softc(dev));
|
|
}
|
|
|
|
static int
|
|
tzic_pic_attach(struct tzic_softc *sc)
|
|
{
|
|
struct intr_pic *pic;
|
|
const char *name;
|
|
intptr_t xref;
|
|
int error;
|
|
u_int irq;
|
|
|
|
name = device_get_nameunit(sc->dev);
|
|
for (irq = 0; irq < TZIC_NIRQS; irq++) {
|
|
sc->isrcs[irq].irq = irq;
|
|
error = intr_isrc_register(&sc->isrcs[irq].isrc,
|
|
sc->dev, 0, "%s,%u", name, irq);
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
|
|
xref = OF_xref_from_node(ofw_bus_get_node(sc->dev));
|
|
pic = intr_pic_register(sc->dev, xref);
|
|
if (pic == NULL)
|
|
return (ENXIO);
|
|
|
|
return (intr_pic_claim_root(sc->dev, xref, tzic_intr, sc, 0));
|
|
}
|
|
|
|
static int
|
|
tzic_probe(device_t dev)
|
|
{
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (ofw_bus_is_compatible(dev, "fsl,tzic")) {
|
|
device_set_desc(dev, "TrustZone Interrupt Controller");
|
|
return (BUS_PROBE_DEFAULT);
|
|
}
|
|
return (ENXIO);
|
|
}
|
|
|
|
static int
|
|
tzic_attach(device_t dev)
|
|
{
|
|
struct tzic_softc *sc = device_get_softc(dev);
|
|
int i;
|
|
|
|
if (tzic_sc)
|
|
return (ENXIO);
|
|
tzic_sc = sc;
|
|
sc->dev = dev;
|
|
|
|
i = 0;
|
|
sc->tzicregs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &i,
|
|
RF_ACTIVE);
|
|
if (sc->tzicregs == NULL) {
|
|
device_printf(dev, "could not allocate resources\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
/* route all interrupts to IRQ. secure interrupts are for FIQ */
|
|
for (i = 0; i < 4; i++)
|
|
tzic_write_4(sc, TZIC_INTSEC(i), 0xffffffff);
|
|
|
|
/* disable all interrupts */
|
|
for (i = 0; i < 4; i++)
|
|
tzic_write_4(sc, TZIC_ENCLEAR(i), 0xffffffff);
|
|
|
|
/* Set all interrupts to priority 0 (max). */
|
|
for (i = 0; i < 128 / 4; ++i)
|
|
tzic_write_4(sc, TZIC_PRIORITY(i), 0);
|
|
|
|
/*
|
|
* Set priority mask to lowest (unmasked) prio, set synchronizer to
|
|
* low-latency mode (as opposed to low-power), enable the controller.
|
|
*/
|
|
tzic_write_4(sc, TZIC_PRIOMASK, 0xff);
|
|
tzic_write_4(sc, TZIC_SYNCCTRL, 0);
|
|
tzic_write_4(sc, TZIC_INTCNTL, INTCNTL_NSEN_MASK|INTCNTL_NSEN|INTCNTL_EN);
|
|
|
|
/* Register as a root pic. */
|
|
if (tzic_pic_attach(sc) != 0) {
|
|
device_printf(dev, "could not attach PIC\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t tzic_methods[] = {
|
|
DEVMETHOD(device_probe, tzic_probe),
|
|
DEVMETHOD(device_attach, tzic_attach),
|
|
|
|
DEVMETHOD(pic_disable_intr, tzic_disable_intr),
|
|
DEVMETHOD(pic_enable_intr, tzic_enable_intr),
|
|
DEVMETHOD(pic_map_intr, tzic_map_intr),
|
|
DEVMETHOD(pic_post_filter, tzic_post_filter),
|
|
DEVMETHOD(pic_post_ithread, tzic_post_ithread),
|
|
DEVMETHOD(pic_pre_ithread, tzic_pre_ithread),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t tzic_driver = {
|
|
"tzic",
|
|
tzic_methods,
|
|
sizeof(struct tzic_softc),
|
|
};
|
|
|
|
static devclass_t tzic_devclass;
|
|
|
|
EARLY_DRIVER_MODULE(tzic, ofwbus, tzic_driver, tzic_devclass, 0, 0,
|
|
BUS_PASS_INTERRUPT);
|