FreeBSD/Linux Kernel Cross Reference
sys/powerpc/ps3/ps3pic.c

     /*-
      * 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);
    static void     ps3pic_eoi(device_t, u_int);
    static void     ps3pic_ipi(device_t, u_int);
    static void     ps3pic_mask(device_t, u_int);
    static void     ps3pic_unmask(device_t, u_int);
    
    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)
   {
           struct ps3pic_softc *sc;
   
           sc = device_get_softc(dev);
           sc->sc_vector[irq] = vector;
   
           ps3pic_unmask(dev, irq);
   }
   
   static void
   ps3pic_eoi(device_t dev, u_int irq)
   {
           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)
   {
           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)
   {
           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);
   }

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