1 /*- 2 * Copyright (c) 2015 Semihalf. 3 * Copyright (c) 2015 Stormshield. 4 * All rights reserved. 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 AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, 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/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/bus.h> 33 #include <sys/conf.h> 34 #include <sys/rman.h> 35 #include <sys/types.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/resource.h> 39 40 #include <vm/vm.h> 41 #include <vm/pmap.h> 42 43 #include <machine/fdt.h> 44 #include <machine/smp.h> 45 46 #include <dev/ofw/ofw_bus_subr.h> 47 48 #include <arm/mv/mvreg.h> 49 50 #include "pmsu.h" 51 52 static struct resource_spec pmsu_spec[] = { 53 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 54 { -1, 0 } 55 }; 56 57 struct pmsu_softc { 58 device_t dev; 59 struct resource *res; 60 }; 61 62 static int pmsu_probe(device_t dev); 63 static int pmsu_attach(device_t dev); 64 static int pmsu_detach(device_t dev); 65 66 static device_method_t pmsu_methods[] = { 67 DEVMETHOD(device_probe, pmsu_probe), 68 DEVMETHOD(device_attach, pmsu_attach), 69 DEVMETHOD(device_detach, pmsu_detach), 70 71 { 0, 0 } 72 }; 73 74 static driver_t pmsu_driver = { 75 "pmsu", 76 pmsu_methods, 77 sizeof(struct pmsu_softc) 78 }; 79 80 static devclass_t pmsu_devclass; 81 82 DRIVER_MODULE(pmsu, simplebus, pmsu_driver, pmsu_devclass, 0, 0); 83 DRIVER_MODULE(pmsu, ofwbus, pmsu_driver, pmsu_devclass, 0, 0); 84 85 static int 86 pmsu_probe(device_t dev) 87 { 88 89 if (!ofw_bus_status_okay(dev)) 90 return (ENXIO); 91 92 if (!ofw_bus_is_compatible(dev, "marvell,armada-380-pmsu")) 93 return (ENXIO); 94 95 device_set_desc(dev, "Power Management Service Unit"); 96 97 return (BUS_PROBE_DEFAULT); 98 } 99 100 static int 101 pmsu_attach(device_t dev) 102 { 103 struct pmsu_softc *sc; 104 int err; 105 106 sc = device_get_softc(dev); 107 sc->dev = dev; 108 109 err = bus_alloc_resources(dev, pmsu_spec, &sc->res); 110 if (err != 0) { 111 device_printf(dev, "could not allocate resources\n"); 112 return (ENXIO); 113 } 114 115 return (0); 116 } 117 118 static int 119 pmsu_detach(device_t dev) 120 { 121 struct pmsu_softc *sc; 122 123 sc = device_get_softc(dev); 124 125 bus_release_resources(dev, pmsu_spec, &sc->res); 126 127 return (0); 128 } 129 130 #ifdef SMP 131 int 132 pmsu_boot_secondary_cpu(void) 133 { 134 bus_space_handle_t vaddr; 135 int rv; 136 137 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_PMSU_BASE, MV_PMSU_REGS_LEN, 138 0, &vaddr); 139 if (rv != 0) 140 return (rv); 141 142 /* Boot cpu1 */ 143 bus_space_write_4(fdtbus_bs_tag, vaddr, PMSU_BOOT_ADDR_REDIRECT_OFFSET(1), 144 pmap_kextract((vm_offset_t)mpentry)); 145 146 cpu_idcache_wbinv_all(); 147 cpu_l2cache_wbinv_all(); 148 armv7_sev(); 149 150 bus_space_unmap(fdtbus_bs_tag, vaddr, MV_PMSU_REGS_LEN); 151 152 return (0); 153 } 154 #endif 155