1 /*- 2 * Copyright (c) 2018-2020 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * This software was developed by BAE Systems, the University of Cambridge 6 * Computer Laboratory, and Memorial University under DARPA/AFRL contract 7 * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing 8 * (TC) research program. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/bus.h> 36 #include <sys/rman.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <machine/bus.h> 40 41 #include <arm64/coresight/coresight.h> 42 #include <arm64/coresight/coresight_funnel.h> 43 44 #include "coresight_if.h" 45 46 #define FUNNEL_DEBUG 47 #undef FUNNEL_DEBUG 48 49 #ifdef FUNNEL_DEBUG 50 #define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__) 51 #else 52 #define dprintf(fmt, ...) 53 #endif 54 55 static struct resource_spec funnel_spec[] = { 56 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 57 { -1, 0 } 58 }; 59 60 static int 61 funnel_init(device_t dev) 62 { 63 struct funnel_softc *sc; 64 65 sc = device_get_softc(dev); 66 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 67 return (0); 68 69 /* Unlock Coresight */ 70 bus_write_4(sc->res, CORESIGHT_LAR, CORESIGHT_UNLOCK); 71 dprintf("Device ID: %x\n", bus_read_4(sc->res, FUNNEL_DEVICEID)); 72 73 return (0); 74 } 75 76 static int 77 funnel_enable(device_t dev, struct endpoint *endp, 78 struct coresight_event *event) 79 { 80 struct funnel_softc *sc; 81 uint32_t reg; 82 83 sc = device_get_softc(dev); 84 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 85 return (0); 86 87 reg = bus_read_4(sc->res, FUNNEL_FUNCTL); 88 reg &= ~(FUNCTL_HOLDTIME_MASK); 89 reg |= (7 << FUNCTL_HOLDTIME_SHIFT); 90 reg |= (1 << endp->reg); 91 bus_write_4(sc->res, FUNNEL_FUNCTL, reg); 92 93 return (0); 94 } 95 96 static void 97 funnel_disable(device_t dev, struct endpoint *endp, 98 struct coresight_event *event) 99 { 100 struct funnel_softc *sc; 101 uint32_t reg; 102 103 sc = device_get_softc(dev); 104 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 105 return; 106 107 reg = bus_read_4(sc->res, FUNNEL_FUNCTL); 108 reg &= ~(1 << endp->reg); 109 bus_write_4(sc->res, FUNNEL_FUNCTL, reg); 110 } 111 112 int 113 funnel_attach(device_t dev) 114 { 115 struct coresight_desc desc; 116 struct funnel_softc *sc; 117 118 sc = device_get_softc(dev); 119 if (sc->hwtype == HWTYPE_FUNNEL && 120 bus_alloc_resources(dev, funnel_spec, &sc->res) != 0) { 121 device_printf(dev, "cannot allocate resources for device\n"); 122 return (ENXIO); 123 } 124 125 desc.pdata = sc->pdata; 126 desc.dev = dev; 127 desc.dev_type = CORESIGHT_FUNNEL; 128 coresight_register(&desc); 129 130 return (0); 131 } 132 133 static device_method_t funnel_methods[] = { 134 /* Coresight interface */ 135 DEVMETHOD(coresight_init, funnel_init), 136 DEVMETHOD(coresight_enable, funnel_enable), 137 DEVMETHOD(coresight_disable, funnel_disable), 138 DEVMETHOD_END 139 }; 140 141 DEFINE_CLASS_0(funnel, funnel_driver, funnel_methods, 142 sizeof(struct funnel_softc)); 143