65d08437ef
a sub-node of nexus (ofwbus) rather than direct attach under nexus. This fixes FDT on x86 and will make coexistence with ACPI on ARM systems easier. SPARC is unchanged. Reviewed by: imp, ian
192 lines
4.7 KiB
C
192 lines
4.7 KiB
C
/*-
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* Copyright (c) 2012, 2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Oleksandr Rybalko under sponsorship
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* from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/ktr.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/cpuset.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/freescale/imx/imx51_tzicreg.h>
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struct tzic_softc {
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struct resource * tzic_res[3];
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bus_space_tag_t tzic_bst;
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bus_space_handle_t tzic_bsh;
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uint8_t ver;
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};
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static struct resource_spec tzic_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static struct tzic_softc *tzic_sc = NULL;
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#define tzic_read_4(reg) \
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bus_space_read_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg)
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#define tzic_write_4(reg, val) \
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bus_space_write_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg, val)
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static void tzic_post_filter(void *);
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static int
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tzic_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_is_compatible(dev, "fsl,tzic")) {
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device_set_desc(dev, "TrustZone Interrupt Controller");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static int
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tzic_attach(device_t dev)
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{
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struct tzic_softc *sc = device_get_softc(dev);
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int i;
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uint32_t reg;
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if (tzic_sc)
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return (ENXIO);
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if (bus_alloc_resources(dev, tzic_spec, sc->tzic_res)) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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arm_post_filter = tzic_post_filter;
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/* Distributor Interface */
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sc->tzic_bst = rman_get_bustag(sc->tzic_res[0]);
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sc->tzic_bsh = rman_get_bushandle(sc->tzic_res[0]);
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tzic_sc = sc;
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reg = tzic_read_4(TZIC_INTCNTL);
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tzic_write_4(TZIC_INTCNTL, INTCNTL_NSEN_MASK|INTCNTL_NSEN|INTCNTL_EN);
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reg = tzic_read_4(TZIC_INTCNTL);
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tzic_write_4(TZIC_PRIOMASK, 0x1f);
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reg = tzic_read_4(TZIC_PRIOMASK);
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tzic_write_4(TZIC_SYNCCTRL, 0x02);
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reg = tzic_read_4(TZIC_SYNCCTRL);
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/* route all interrupts to IRQ. secure interrupts are for FIQ */
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for (i = 0; i < 4; i++)
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tzic_write_4(TZIC_INTSEC(i), 0xffffffff);
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/* disable all interrupts */
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for (i = 0; i < 4; i++)
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tzic_write_4(TZIC_ENCLEAR(i), 0xffffffff);
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return (0);
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}
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static device_method_t tzic_methods[] = {
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DEVMETHOD(device_probe, tzic_probe),
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DEVMETHOD(device_attach, tzic_attach),
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{ 0, 0 }
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};
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static driver_t tzic_driver = {
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"tzic",
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tzic_methods,
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sizeof(struct tzic_softc),
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};
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static devclass_t tzic_devclass;
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/*
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* Memory space of controller located outside of device range, so let him to
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* attach not only to simplebus, but ofwbus also.
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*/
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EARLY_DRIVER_MODULE(tzic, ofwbus, tzic_driver, tzic_devclass, 0, 0,
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BUS_PASS_INTERRUPT);
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EARLY_DRIVER_MODULE(tzic, simplebus, tzic_driver, tzic_devclass, 0, 0,
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BUS_PASS_INTERRUPT);
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static void
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tzic_post_filter(void *arg)
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{
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}
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int
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arm_get_next_irq(int last_irq)
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{
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uint32_t pending;
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int i, b;
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for (i = 0; i < 4; i++) {
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pending = tzic_read_4(TZIC_PND(i));
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for (b = 0; pending != 0 && b < 32; b++)
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if (pending & (1 << b)) {
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return (i * 32 + b);
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}
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}
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return (-1);
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}
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void
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arm_mask_irq(uintptr_t nb)
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{
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tzic_write_4(TZIC_ENCLEAR(nb / 32), (1UL <<(nb % 32)));
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}
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void
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arm_unmask_irq(uintptr_t nb)
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{
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tzic_write_4(TZIC_ENSET(nb / 32), (1UL <<(nb % 32)));
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}
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