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/param.h> 33 #include <sys/systm.h> 34 #include <sys/bus.h> 35 #include <sys/rman.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <machine/bus.h> 39 40 #include <arm64/coresight/coresight.h> 41 #include <arm64/coresight/coresight_funnel.h> 42 43 #include "coresight_if.h" 44 45 #define FUNNEL_DEBUG 46 #undef FUNNEL_DEBUG 47 48 #ifdef FUNNEL_DEBUG 49 #define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__) 50 #else 51 #define dprintf(fmt, ...) 52 #endif 53 54 static struct resource_spec funnel_spec[] = { 55 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 56 { -1, 0 } 57 }; 58 59 static int 60 funnel_init(device_t dev) 61 { 62 struct funnel_softc *sc; 63 64 sc = device_get_softc(dev); 65 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 66 return (0); 67 68 /* Unlock Coresight */ 69 bus_write_4(sc->res, CORESIGHT_LAR, CORESIGHT_UNLOCK); 70 dprintf("Device ID: %x\n", bus_read_4(sc->res, FUNNEL_DEVICEID)); 71 72 return (0); 73 } 74 75 static int 76 funnel_enable(device_t dev, struct endpoint *endp, 77 struct coresight_event *event) 78 { 79 struct funnel_softc *sc; 80 uint32_t reg; 81 82 sc = device_get_softc(dev); 83 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 84 return (0); 85 86 reg = bus_read_4(sc->res, FUNNEL_FUNCTL); 87 reg &= ~(FUNCTL_HOLDTIME_MASK); 88 reg |= (7 << FUNCTL_HOLDTIME_SHIFT); 89 reg |= (1 << endp->reg); 90 bus_write_4(sc->res, FUNNEL_FUNCTL, reg); 91 92 return (0); 93 } 94 95 static void 96 funnel_disable(device_t dev, struct endpoint *endp, 97 struct coresight_event *event) 98 { 99 struct funnel_softc *sc; 100 uint32_t reg; 101 102 sc = device_get_softc(dev); 103 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 104 return; 105 106 reg = bus_read_4(sc->res, FUNNEL_FUNCTL); 107 reg &= ~(1 << endp->reg); 108 bus_write_4(sc->res, FUNNEL_FUNCTL, reg); 109 } 110 111 int 112 funnel_attach(device_t dev) 113 { 114 struct coresight_desc desc; 115 struct funnel_softc *sc; 116 117 sc = device_get_softc(dev); 118 if (sc->hwtype == HWTYPE_FUNNEL && 119 bus_alloc_resources(dev, funnel_spec, &sc->res) != 0) { 120 device_printf(dev, "cannot allocate resources for device\n"); 121 return (ENXIO); 122 } 123 124 desc.pdata = sc->pdata; 125 desc.dev = dev; 126 desc.dev_type = CORESIGHT_FUNNEL; 127 coresight_register(&desc); 128 129 return (0); 130 } 131 132 static device_method_t funnel_methods[] = { 133 /* Coresight interface */ 134 DEVMETHOD(coresight_init, funnel_init), 135 DEVMETHOD(coresight_enable, funnel_enable), 136 DEVMETHOD(coresight_disable, funnel_disable), 137 DEVMETHOD_END 138 }; 139 140 DEFINE_CLASS_0(funnel, funnel_driver, funnel_methods, 141 sizeof(struct funnel_softc)); 142