1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright 2010 Nathan Whitehorn 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 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 47 static void ps3pic_identify(driver_t *driver, device_t parent); 48 static int ps3pic_probe(device_t); 49 static int ps3pic_attach(device_t); 50 51 static void ps3pic_dispatch(device_t, struct trapframe *); 52 static void ps3pic_enable(device_t, u_int, u_int, void **); 53 static void ps3pic_eoi(device_t, u_int, void *); 54 static void ps3pic_ipi(device_t, u_int); 55 static void ps3pic_mask(device_t, u_int, void *); 56 static void ps3pic_unmask(device_t, u_int, void *); 57 58 struct 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 69 static 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 86 static driver_t ps3pic_driver = { 87 "ps3pic", 88 ps3pic_methods, 89 sizeof(struct ps3pic_softc) 90 }; 91 92 DRIVER_MODULE(ps3pic, nexus, ps3pic_driver, 0, 0); 93 94 static MALLOC_DEFINE(M_PS3PIC, "ps3pic", "PS3 PIC"); 95 96 static void 97 ps3pic_identify(driver_t *driver, device_t parent) 98 { 99 if (strcmp(installed_platform(), "ps3") != 0) 100 return; 101 102 if (device_find_child(parent, "ps3pic", -1) == NULL) 103 BUS_ADD_CHILD(parent, 0, "ps3pic", 0); 104 } 105 106 static int 107 ps3pic_probe(device_t dev) 108 { 109 device_set_desc(dev, "Playstation 3 interrupt controller"); 110 return (BUS_PROBE_NOWILDCARD); 111 } 112 113 static int 114 ps3pic_attach(device_t dev) 115 { 116 struct ps3pic_softc *sc; 117 uint64_t ppe; 118 int thread; 119 120 sc = device_get_softc(dev); 121 122 sc->bitmap_thread0 = contigmalloc(128 /* 512 bits * 2 */, M_PS3PIC, 123 M_NOWAIT | M_ZERO, 0, BUS_SPACE_MAXADDR, 64 /* alignment */, 124 PAGE_SIZE /* boundary */); 125 sc->mask_thread0 = sc->bitmap_thread0 + 4; 126 sc->bitmap_thread1 = sc->bitmap_thread0 + 8; 127 sc->mask_thread1 = sc->bitmap_thread0 + 12; 128 129 lv1_get_logical_ppe_id(&ppe); 130 thread = 32 - fls(mfctrl()); 131 lv1_configure_irq_state_bitmap(ppe, thread, 132 vtophys(sc->bitmap_thread0)); 133 134 sc->sc_ipi_virq = 63; 135 136 #ifdef SMP 137 lv1_configure_irq_state_bitmap(ppe, !thread, 138 vtophys(sc->bitmap_thread1)); 139 140 /* Map both IPIs to the same VIRQ to avoid changes in intr_machdep */ 141 lv1_construct_event_receive_port(&sc->sc_ipi_outlet[0]); 142 lv1_connect_irq_plug_ext(ppe, thread, sc->sc_ipi_virq, 143 sc->sc_ipi_outlet[0], 0); 144 lv1_construct_event_receive_port(&sc->sc_ipi_outlet[1]); 145 lv1_connect_irq_plug_ext(ppe, !thread, sc->sc_ipi_virq, 146 sc->sc_ipi_outlet[1], 0); 147 #endif 148 149 powerpc_register_pic(dev, 0, sc->sc_ipi_virq, 1, FALSE); 150 return (0); 151 } 152 153 /* 154 * PIC I/F methods. 155 */ 156 157 static void 158 ps3pic_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 = atomic_readandclear_64(&sc->bitmap_thread0[0]); 168 mask = sc->mask_thread0[0]; 169 } else { 170 bitmap = atomic_readandclear_64(&sc->bitmap_thread1[0]); 171 mask = sc->mask_thread1[0]; 172 } 173 powerpc_sync(); 174 175 while ((irq = ffsl(bitmap & mask) - 1) != -1) { 176 bitmap &= ~(1UL << irq); 177 powerpc_dispatch_intr(sc->sc_vector[63 - irq], tf); 178 } 179 } 180 181 static void 182 ps3pic_enable(device_t dev, u_int irq, u_int vector, void **priv) 183 { 184 struct ps3pic_softc *sc; 185 186 sc = device_get_softc(dev); 187 sc->sc_vector[irq] = vector; 188 189 ps3pic_unmask(dev, irq, priv); 190 } 191 192 static void 193 ps3pic_eoi(device_t dev, u_int irq, void *priv) 194 { 195 uint64_t ppe; 196 int thread; 197 198 lv1_get_logical_ppe_id(&ppe); 199 thread = 32 - fls(mfctrl()); 200 201 lv1_end_of_interrupt_ext(ppe, thread, irq); 202 } 203 204 static void 205 ps3pic_ipi(device_t dev, u_int cpu) 206 { 207 struct ps3pic_softc *sc; 208 sc = device_get_softc(dev); 209 210 lv1_send_event_locally(sc->sc_ipi_outlet[cpu]); 211 } 212 213 static void 214 ps3pic_mask(device_t dev, u_int irq, void *priv) 215 { 216 struct ps3pic_softc *sc; 217 uint64_t ppe; 218 219 sc = device_get_softc(dev); 220 221 /* Do not mask IPIs! */ 222 if (irq == sc->sc_ipi_virq) 223 return; 224 225 atomic_clear_64(&sc->mask_thread0[0], 1UL << (63 - irq)); 226 atomic_clear_64(&sc->mask_thread1[0], 1UL << (63 - irq)); 227 228 lv1_get_logical_ppe_id(&ppe); 229 lv1_did_update_interrupt_mask(ppe, 0); 230 lv1_did_update_interrupt_mask(ppe, 1); 231 } 232 233 static void 234 ps3pic_unmask(device_t dev, u_int irq, void *priv) 235 { 236 struct ps3pic_softc *sc; 237 uint64_t ppe; 238 239 sc = device_get_softc(dev); 240 atomic_set_64(&sc->mask_thread0[0], 1UL << (63 - irq)); 241 atomic_set_64(&sc->mask_thread1[0], 1UL << (63 - irq)); 242 243 lv1_get_logical_ppe_id(&ppe); 244 lv1_did_update_interrupt_mask(ppe, 0); 245 lv1_did_update_interrupt_mask(ppe, 1); 246 } 247