ps3pic.c revision 227779
1/*- 2 * Copyright 2010 Nathan Whitehorn 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 18 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 20 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 21 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD: head/sys/powerpc/ps3/ps3pic.c 227779 2011-11-21 04:35:23Z nwhitehorn $ 26 */ 27 28#include <sys/param.h> 29#include <sys/systm.h> 30#include <sys/module.h> 31#include <sys/bus.h> 32#include <sys/conf.h> 33#include <sys/kernel.h> 34#include <sys/malloc.h> 35 36#include <vm/vm.h> 37#include <vm/pmap.h> 38 39#include <machine/bus.h> 40#include <machine/intr_machdep.h> 41#include <machine/md_var.h> 42#include <machine/platform.h> 43 44#include "ps3-hvcall.h" 45#include "pic_if.h" 46 47static void ps3pic_identify(driver_t *driver, device_t parent); 48static int ps3pic_probe(device_t); 49static int ps3pic_attach(device_t); 50 51static void ps3pic_dispatch(device_t, struct trapframe *); 52static void ps3pic_enable(device_t, u_int, u_int); 53static void ps3pic_eoi(device_t, u_int); 54static void ps3pic_ipi(device_t, u_int); 55static void ps3pic_mask(device_t, u_int); 56static void ps3pic_unmask(device_t, u_int); 57 58struct ps3pic_softc { 59 volatile uint64_t *bitmap_thread0; 60 volatile uint64_t *mask_thread0; 61 volatile uint64_t *bitmap_thread1; 62 volatile uint64_t *mask_thread1; 63 64 uint64_t sc_ipi_outlet[2]; 65 int sc_vector[64]; 66}; 67 68static device_method_t ps3pic_methods[] = { 69 /* Device interface */ 70 DEVMETHOD(device_identify, ps3pic_identify), 71 DEVMETHOD(device_probe, ps3pic_probe), 72 DEVMETHOD(device_attach, ps3pic_attach), 73 74 /* PIC interface */ 75 DEVMETHOD(pic_dispatch, ps3pic_dispatch), 76 DEVMETHOD(pic_enable, ps3pic_enable), 77 DEVMETHOD(pic_eoi, ps3pic_eoi), 78 DEVMETHOD(pic_ipi, ps3pic_ipi), 79 DEVMETHOD(pic_mask, ps3pic_mask), 80 DEVMETHOD(pic_unmask, ps3pic_unmask), 81 82 { 0, 0 }, 83}; 84 85static driver_t ps3pic_driver = { 86 "ps3pic", 87 ps3pic_methods, 88 sizeof(struct ps3pic_softc) 89}; 90 91static devclass_t ps3pic_devclass; 92 93DRIVER_MODULE(ps3pic, nexus, ps3pic_driver, ps3pic_devclass, 0, 0); 94 95static MALLOC_DEFINE(M_PS3PIC, "ps3pic", "PS3 PIC"); 96 97static void 98ps3pic_identify(driver_t *driver, device_t parent) 99{ 100 if (strcmp(installed_platform(), "ps3") != 0) 101 return; 102 103 if (device_find_child(parent, "ps3pic", -1) == NULL) 104 BUS_ADD_CHILD(parent, 0, "ps3pic", 0); 105} 106 107static int 108ps3pic_probe(device_t dev) 109{ 110 device_set_desc(dev, "Playstation 3 interrupt controller"); 111 return (BUS_PROBE_NOWILDCARD); 112} 113 114static int 115ps3pic_attach(device_t dev) 116{ 117 struct ps3pic_softc *sc; 118 uint64_t ppe; 119 int thread; 120 121 sc = device_get_softc(dev); 122 123 sc->bitmap_thread0 = contigmalloc(128 /* 512 bits * 2 */, M_PS3PIC, 124 M_NOWAIT | M_ZERO, 0, BUS_SPACE_MAXADDR, 64 /* alignment */, 125 PAGE_SIZE /* boundary */); 126 sc->mask_thread0 = sc->bitmap_thread0 + 4; 127 sc->bitmap_thread1 = sc->bitmap_thread0 + 8; 128 sc->mask_thread1 = sc->bitmap_thread0 + 12; 129 130 lv1_get_logical_ppe_id(&ppe); 131 thread = 32 - fls(mfctrl()); 132 lv1_configure_irq_state_bitmap(ppe, thread, 133 vtophys(sc->bitmap_thread0)); 134#ifdef SMP 135 lv1_configure_irq_state_bitmap(ppe, !thread, 136 vtophys(sc->bitmap_thread1)); 137 138 /* Map both IPIs to the same VIRQ to avoid changes in intr_machdep */ 139 lv1_construct_event_receive_port(&sc->sc_ipi_outlet[0]); 140 lv1_connect_irq_plug_ext(ppe, thread, sc->sc_ipi_outlet[0], 141 sc->sc_ipi_outlet[0], 0); 142 lv1_construct_event_receive_port(&sc->sc_ipi_outlet[1]); 143 lv1_connect_irq_plug_ext(ppe, !thread, sc->sc_ipi_outlet[0], 144 sc->sc_ipi_outlet[1], 0); 145#else 146 sc->sc_ipi_outlet[0] = sc->sc_ipi_outlet[1] = 63; 147#endif 148 149 powerpc_register_pic(dev, 0, sc->sc_ipi_outlet[0], 1, FALSE); 150 return (0); 151} 152 153/* 154 * PIC I/F methods. 155 */ 156 157static void 158ps3pic_dispatch(device_t dev, struct trapframe *tf) 159{ 160 uint64_t bitmap, mask; 161 int irq; 162 struct ps3pic_softc *sc; 163 164 sc = device_get_softc(dev); 165 166 if (PCPU_GET(cpuid) == 0) { 167 bitmap = sc->bitmap_thread0[0]; 168 mask = sc->mask_thread0[0]; 169 } else { 170 bitmap = sc->bitmap_thread1[0]; 171 mask = sc->mask_thread1[0]; 172 } 173 174 while ((irq = ffsl(bitmap & mask) - 1) != -1) { 175 bitmap &= ~(1UL << irq); 176 powerpc_dispatch_intr(sc->sc_vector[63 - irq], tf); 177 } 178} 179 180static void 181ps3pic_enable(device_t dev, u_int irq, u_int vector) 182{ 183 struct ps3pic_softc *sc; 184 185 sc = device_get_softc(dev); 186 sc->sc_vector[irq] = vector; 187 188 ps3pic_unmask(dev, irq); 189} 190 191static void 192ps3pic_eoi(device_t dev, u_int irq) 193{ 194 uint64_t ppe; 195 int thread; 196 197 lv1_get_logical_ppe_id(&ppe); 198 thread = 32 - fls(mfctrl()); 199 200 lv1_end_of_interrupt_ext(ppe, thread, irq); 201} 202 203static void 204ps3pic_ipi(device_t dev, u_int cpu) 205{ 206 struct ps3pic_softc *sc; 207 sc = device_get_softc(dev); 208 209 lv1_send_event_locally(sc->sc_ipi_outlet[cpu]); 210} 211 212static void 213ps3pic_mask(device_t dev, u_int irq) 214{ 215 struct ps3pic_softc *sc; 216 uint64_t ppe; 217 218 sc = device_get_softc(dev); 219 220 /* Do not mask IPIs! */ 221 if (irq == sc->sc_ipi_outlet[0]) 222 return; 223 224 atomic_clear_64(&sc->mask_thread0[0], 1UL << (63 - irq)); 225 atomic_clear_64(&sc->mask_thread1[0], 1UL << (63 - irq)); 226 227 lv1_get_logical_ppe_id(&ppe); 228 lv1_did_update_interrupt_mask(ppe, 0); 229 lv1_did_update_interrupt_mask(ppe, 1); 230} 231 232static void 233ps3pic_unmask(device_t dev, u_int irq) 234{ 235 struct ps3pic_softc *sc; 236 uint64_t ppe; 237 238 sc = device_get_softc(dev); 239 atomic_set_64(&sc->mask_thread0[0], 1UL << (63 - irq)); 240 atomic_set_64(&sc->mask_thread1[0], 1UL << (63 - irq)); 241 242 lv1_get_logical_ppe_id(&ppe); 243 lv1_did_update_interrupt_mask(ppe, 0); 244 lv1_did_update_interrupt_mask(ppe, 1); 245} 246