5cf5b4b58d
reach single user mode using a memory disk device as the file system. This port includes the framebuffer driver, the PIC driver, a platform driver and the GPIO driver. The IPC driver (to talk to IOS kernels) is not yet written but there's a placeholder for it. There are still some MMU problems and to get a working system you need to patch locore32.S. Since we haven't found the best way yet to address that problem, we're not committing those changes yet. The problem is related to the different BAT layout on the Wii and to the fact that the Homebrew loader doesn't clean up the special registers (including the 8 BATs) before passing control to us. You'll need a Wii with Homebrew loader and a TV that can do NTSC (for now). Submitted by: Margarida Gouveia
210 lines
5.2 KiB
C
210 lines
5.2 KiB
C
/*-
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* Copyright (C) 2012 Margarida Gouveia
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* All rights reserved.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/platform.h>
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#include <machine/intr_machdep.h>
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#include <machine/resource.h>
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#include <powerpc/wii/wii_picreg.h>
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#include "pic_if.h"
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static int wiipic_probe(device_t);
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static int wiipic_attach(device_t);
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static void wiipic_dispatch(device_t, struct trapframe *);
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static void wiipic_enable(device_t, unsigned int, unsigned int);
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static void wiipic_eoi(device_t, unsigned int);
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static void wiipic_mask(device_t, unsigned int);
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static void wiipic_unmask(device_t, unsigned int);
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struct wiipic_softc {
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device_t sc_dev;
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struct resource *sc_rres;
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bus_space_tag_t sc_bt;
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bus_space_handle_t sc_bh;
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int sc_rrid;
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int sc_vector[WIIPIC_NIRQ];
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};
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static device_method_t wiipic_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, wiipic_probe),
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DEVMETHOD(device_attach, wiipic_attach),
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/* PIC interface */
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DEVMETHOD(pic_dispatch, wiipic_dispatch),
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DEVMETHOD(pic_enable, wiipic_enable),
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DEVMETHOD(pic_eoi, wiipic_eoi),
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DEVMETHOD(pic_mask, wiipic_mask),
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DEVMETHOD(pic_unmask, wiipic_unmask),
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{ 0, 0 },
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};
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static driver_t wiipic_driver = {
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"wiipic",
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wiipic_methods,
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sizeof(struct wiipic_softc)
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};
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static devclass_t wiipic_devclass;
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DRIVER_MODULE(wiipic, wiibus, wiipic_driver, wiipic_devclass, 0, 0);
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static __inline uint32_t
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wiipic_imr_read(struct wiipic_softc *sc)
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{
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return (bus_space_read_4(sc->sc_bt, sc->sc_bh, WIIPIC_IMR));
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}
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static __inline void
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wiipic_imr_write(struct wiipic_softc *sc, uint32_t imr)
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{
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bus_space_write_4(sc->sc_bt, sc->sc_bh, WIIPIC_IMR, imr);
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}
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static __inline uint32_t
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wiipic_icr_read(struct wiipic_softc *sc)
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{
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return (bus_space_read_4(sc->sc_bt, sc->sc_bh, WIIPIC_ICR));
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}
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static __inline void
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wiipic_icr_write(struct wiipic_softc *sc, uint32_t icr)
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{
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bus_space_write_4(sc->sc_bt, sc->sc_bh, WIIPIC_ICR, icr);
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}
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static int
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wiipic_probe(device_t dev)
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{
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device_set_desc(dev, "Nintendo Wii PIC");
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return (BUS_PROBE_NOWILDCARD);
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}
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static int
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wiipic_attach(device_t dev)
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{
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struct wiipic_softc *sc;
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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sc->sc_rrid = 0;
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sc->sc_rres = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->sc_rrid, RF_ACTIVE);
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if (sc->sc_rres == NULL) {
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device_printf(dev, "could not alloc mem resource\n");
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return (ENXIO);
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}
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sc->sc_bt = rman_get_bustag(sc->sc_rres);
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sc->sc_bh = rman_get_bushandle(sc->sc_rres);
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/* Turn off all interrupts */
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wiipic_imr_write(sc, 0x00000000);
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wiipic_icr_write(sc, 0xffffffff);
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powerpc_register_pic(dev, 0, WIIPIC_NIRQ, 0, FALSE);
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return (0);
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}
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static void
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wiipic_dispatch(device_t dev, struct trapframe *tf)
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{
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struct wiipic_softc *sc;
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uint32_t irq;
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sc = device_get_softc(dev);
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irq = ffs(wiipic_icr_read(sc) & wiipic_imr_read(sc));
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KASSERT(irq < WIIPIC_NIRQ, ("bogus irq %d", irq));
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powerpc_dispatch_intr(sc->sc_vector[irq], tf);
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}
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static void
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wiipic_enable(device_t dev, unsigned int irq, unsigned int vector)
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{
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struct wiipic_softc *sc;
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KASSERT(irq < WIIPIC_NIRQ, ("bogus irq %d", irq));
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sc = device_get_softc(dev);
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sc->sc_vector[irq] = vector;
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wiipic_unmask(dev, irq);
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}
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static void
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wiipic_eoi(device_t dev, unsigned int irq)
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{
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struct wiipic_softc *sc;
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uint32_t icr;
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sc = device_get_softc(dev);
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icr = wiipic_icr_read(sc);
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icr |= (1 << irq);
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wiipic_icr_write(sc, icr);
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}
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static void
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wiipic_mask(device_t dev, unsigned int irq)
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{
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struct wiipic_softc *sc;
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uint32_t imr;
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sc = device_get_softc(dev);
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imr = wiipic_imr_read(sc);
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imr &= ~(1 << irq);
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wiipic_imr_write(sc, imr);
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}
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static void
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wiipic_unmask(device_t dev, unsigned int irq)
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{
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struct wiipic_softc *sc;
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uint32_t imr;
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sc = device_get_softc(dev);
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imr = wiipic_imr_read(sc);
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imr |= (1 << irq);
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wiipic_imr_write(sc, imr);
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}
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