ps3pic.c revision 266676
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: stable/10/sys/powerpc/ps3/ps3pic.c 266676 2014-05-26 01:37:43Z 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 uint64_t sc_ipi_virq; 66 int sc_vector[64]; 67}; 68 69static device_method_t ps3pic_methods[] = { 70 /* Device interface */ 71 DEVMETHOD(device_identify, ps3pic_identify), 72 DEVMETHOD(device_probe, ps3pic_probe), 73 DEVMETHOD(device_attach, ps3pic_attach), 74 75 /* PIC interface */ 76 DEVMETHOD(pic_dispatch, ps3pic_dispatch), 77 DEVMETHOD(pic_enable, ps3pic_enable), 78 DEVMETHOD(pic_eoi, ps3pic_eoi), 79 DEVMETHOD(pic_ipi, ps3pic_ipi), 80 DEVMETHOD(pic_mask, ps3pic_mask), 81 DEVMETHOD(pic_unmask, ps3pic_unmask), 82 83 { 0, 0 }, 84}; 85 86static driver_t ps3pic_driver = { 87 "ps3pic", 88 ps3pic_methods, 89 sizeof(struct ps3pic_softc) 90}; 91 92static devclass_t ps3pic_devclass; 93 94DRIVER_MODULE(ps3pic, nexus, ps3pic_driver, ps3pic_devclass, 0, 0); 95 96static MALLOC_DEFINE(M_PS3PIC, "ps3pic", "PS3 PIC"); 97 98static void 99ps3pic_identify(driver_t *driver, device_t parent) 100{ 101 if (strcmp(installed_platform(), "ps3") != 0) 102 return; 103 104 if (device_find_child(parent, "ps3pic", -1) == NULL) 105 BUS_ADD_CHILD(parent, 0, "ps3pic", 0); 106} 107 108static int 109ps3pic_probe(device_t dev) 110{ 111 device_set_desc(dev, "Playstation 3 interrupt controller"); 112 return (BUS_PROBE_NOWILDCARD); 113} 114 115static int 116ps3pic_attach(device_t dev) 117{ 118 struct ps3pic_softc *sc; 119 uint64_t ppe; 120 int thread; 121 122 sc = device_get_softc(dev); 123 124 sc->bitmap_thread0 = contigmalloc(128 /* 512 bits * 2 */, M_PS3PIC, 125 M_NOWAIT | M_ZERO, 0, BUS_SPACE_MAXADDR, 64 /* alignment */, 126 PAGE_SIZE /* boundary */); 127 sc->mask_thread0 = sc->bitmap_thread0 + 4; 128 sc->bitmap_thread1 = sc->bitmap_thread0 + 8; 129 sc->mask_thread1 = sc->bitmap_thread0 + 12; 130 131 lv1_get_logical_ppe_id(&ppe); 132 thread = 32 - fls(mfctrl()); 133 lv1_configure_irq_state_bitmap(ppe, thread, 134 vtophys(sc->bitmap_thread0)); 135 136 sc->sc_ipi_virq = 63; 137 138#ifdef SMP 139 lv1_configure_irq_state_bitmap(ppe, !thread, 140 vtophys(sc->bitmap_thread1)); 141 142 /* Map both IPIs to the same VIRQ to avoid changes in intr_machdep */ 143 lv1_construct_event_receive_port(&sc->sc_ipi_outlet[0]); 144 lv1_connect_irq_plug_ext(ppe, thread, sc->sc_ipi_virq, 145 sc->sc_ipi_outlet[0], 0); 146 lv1_construct_event_receive_port(&sc->sc_ipi_outlet[1]); 147 lv1_connect_irq_plug_ext(ppe, !thread, sc->sc_ipi_virq, 148 sc->sc_ipi_outlet[1], 0); 149#endif 150 151 powerpc_register_pic(dev, 0, sc->sc_ipi_virq, 1, FALSE); 152 return (0); 153} 154 155/* 156 * PIC I/F methods. 157 */ 158 159static void 160ps3pic_dispatch(device_t dev, struct trapframe *tf) 161{ 162 uint64_t bitmap, mask; 163 int irq; 164 struct ps3pic_softc *sc; 165 166 sc = device_get_softc(dev); 167 168 if (PCPU_GET(cpuid) == 0) { 169 bitmap = atomic_readandclear_64(&sc->bitmap_thread0[0]); 170 mask = sc->mask_thread0[0]; 171 } else { 172 bitmap = atomic_readandclear_64(&sc->bitmap_thread1[0]); 173 mask = sc->mask_thread1[0]; 174 } 175 powerpc_sync(); 176 177 while ((irq = ffsl(bitmap & mask) - 1) != -1) { 178 bitmap &= ~(1UL << irq); 179 powerpc_dispatch_intr(sc->sc_vector[63 - irq], tf); 180 } 181} 182 183static void 184ps3pic_enable(device_t dev, u_int irq, u_int vector) 185{ 186 struct ps3pic_softc *sc; 187 188 sc = device_get_softc(dev); 189 sc->sc_vector[irq] = vector; 190 191 ps3pic_unmask(dev, irq); 192} 193 194static void 195ps3pic_eoi(device_t dev, u_int irq) 196{ 197 uint64_t ppe; 198 int thread; 199 200 lv1_get_logical_ppe_id(&ppe); 201 thread = 32 - fls(mfctrl()); 202 203 lv1_end_of_interrupt_ext(ppe, thread, irq); 204} 205 206static void 207ps3pic_ipi(device_t dev, u_int cpu) 208{ 209 struct ps3pic_softc *sc; 210 sc = device_get_softc(dev); 211 212 lv1_send_event_locally(sc->sc_ipi_outlet[cpu]); 213} 214 215static void 216ps3pic_mask(device_t dev, u_int irq) 217{ 218 struct ps3pic_softc *sc; 219 uint64_t ppe; 220 221 sc = device_get_softc(dev); 222 223 /* Do not mask IPIs! */ 224 if (irq == sc->sc_ipi_virq) 225 return; 226 227 atomic_clear_64(&sc->mask_thread0[0], 1UL << (63 - irq)); 228 atomic_clear_64(&sc->mask_thread1[0], 1UL << (63 - irq)); 229 230 lv1_get_logical_ppe_id(&ppe); 231 lv1_did_update_interrupt_mask(ppe, 0); 232 lv1_did_update_interrupt_mask(ppe, 1); 233} 234 235static void 236ps3pic_unmask(device_t dev, u_int irq) 237{ 238 struct ps3pic_softc *sc; 239 uint64_t ppe; 240 241 sc = device_get_softc(dev); 242 atomic_set_64(&sc->mask_thread0[0], 1UL << (63 - irq)); 243 atomic_set_64(&sc->mask_thread1[0], 1UL << (63 - irq)); 244 245 lv1_get_logical_ppe_id(&ppe); 246 lv1_did_update_interrupt_mask(ppe, 0); 247 lv1_did_update_interrupt_mask(ppe, 1); 248} 249