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 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/bus.h> 38 #include <sys/rman.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 #include <machine/bus.h> 42 43 #include <arm64/coresight/coresight.h> 44 #include <arm64/coresight/coresight_funnel.h> 45 46 #include "coresight_if.h" 47 48 #define FUNNEL_DEBUG 49 #undef FUNNEL_DEBUG 50 51 #ifdef FUNNEL_DEBUG 52 #define dprintf(fmt, ...) printf(fmt, ##__VA_ARGS__) 53 #else 54 #define dprintf(fmt, ...) 55 #endif 56 57 static struct resource_spec funnel_spec[] = { 58 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 59 { -1, 0 } 60 }; 61 62 static int 63 funnel_init(device_t dev) 64 { 65 struct funnel_softc *sc; 66 67 sc = device_get_softc(dev); 68 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 69 return (0); 70 71 /* Unlock Coresight */ 72 bus_write_4(sc->res, CORESIGHT_LAR, CORESIGHT_UNLOCK); 73 dprintf("Device ID: %x\n", bus_read_4(sc->res, FUNNEL_DEVICEID)); 74 75 return (0); 76 } 77 78 static int 79 funnel_enable(device_t dev, struct endpoint *endp, 80 struct coresight_event *event) 81 { 82 struct funnel_softc *sc; 83 uint32_t reg; 84 85 sc = device_get_softc(dev); 86 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 87 return (0); 88 89 reg = bus_read_4(sc->res, FUNNEL_FUNCTL); 90 reg &= ~(FUNCTL_HOLDTIME_MASK); 91 reg |= (7 << FUNCTL_HOLDTIME_SHIFT); 92 reg |= (1 << endp->reg); 93 bus_write_4(sc->res, FUNNEL_FUNCTL, reg); 94 95 return (0); 96 } 97 98 static void 99 funnel_disable(device_t dev, struct endpoint *endp, 100 struct coresight_event *event) 101 { 102 struct funnel_softc *sc; 103 uint32_t reg; 104 105 sc = device_get_softc(dev); 106 if (sc->hwtype == HWTYPE_STATIC_FUNNEL) 107 return; 108 109 reg = bus_read_4(sc->res, FUNNEL_FUNCTL); 110 reg &= ~(1 << endp->reg); 111 bus_write_4(sc->res, FUNNEL_FUNCTL, reg); 112 } 113 114 int 115 funnel_attach(device_t dev) 116 { 117 struct coresight_desc desc; 118 struct funnel_softc *sc; 119 120 sc = device_get_softc(dev); 121 if (sc->hwtype == HWTYPE_FUNNEL && 122 bus_alloc_resources(dev, funnel_spec, &sc->res) != 0) { 123 device_printf(dev, "cannot allocate resources for device\n"); 124 return (ENXIO); 125 } 126 127 desc.pdata = sc->pdata; 128 desc.dev = dev; 129 desc.dev_type = CORESIGHT_FUNNEL; 130 coresight_register(&desc); 131 132 return (0); 133 } 134 135 static device_method_t funnel_methods[] = { 136 /* Coresight interface */ 137 DEVMETHOD(coresight_init, funnel_init), 138 DEVMETHOD(coresight_enable, funnel_enable), 139 DEVMETHOD(coresight_disable, funnel_disable), 140 DEVMETHOD_END 141 }; 142 143 DEFINE_CLASS_0(funnel, funnel_driver, funnel_methods, 144 sizeof(struct funnel_softc)); 145