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 #include <sys/systm.h> 40 41 #include <vm/vm.h> 42 #include <vm/pmap.h> 43 44 #include <machine/cpu.h> 45 #include <machine/fdt.h> 46 #include <machine/smp.h> 47 48 #include <dev/ofw/ofw_bus_subr.h> 49 50 #include <arm/mv/mvreg.h> 51 52 #include "pmsu.h" 53 54 static struct resource_spec pmsu_spec[] = { 55 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 56 { -1, 0 } 57 }; 58 59 struct pmsu_softc { 60 device_t dev; 61 struct resource *res; 62 }; 63 64 static int pmsu_probe(device_t dev); 65 static int pmsu_attach(device_t dev); 66 static int pmsu_detach(device_t dev); 67 68 static device_method_t pmsu_methods[] = { 69 DEVMETHOD(device_probe, pmsu_probe), 70 DEVMETHOD(device_attach, pmsu_attach), 71 DEVMETHOD(device_detach, pmsu_detach), 72 { 0, 0 } 73 }; 74 75 static driver_t pmsu_driver = { 76 "pmsu", 77 pmsu_methods, 78 sizeof(struct pmsu_softc) 79 }; 80 81 static devclass_t pmsu_devclass; 82 83 DRIVER_MODULE(pmsu, simplebus, pmsu_driver, pmsu_devclass, 0, 0); 84 DRIVER_MODULE(pmsu, ofwbus, pmsu_driver, pmsu_devclass, 0, 0); 85 86 static int 87 pmsu_probe(device_t dev) 88 { 89 90 if (!ofw_bus_status_okay(dev)) 91 return (ENXIO); 92 93 if (!ofw_bus_is_compatible(dev, "marvell,armada-380-pmsu")) 94 return (ENXIO); 95 96 device_set_desc(dev, "Power Management Service Unit"); 97 98 return (BUS_PROBE_DEFAULT); 99 } 100 101 static int 102 pmsu_attach(device_t dev) 103 { 104 struct pmsu_softc *sc; 105 int err; 106 107 sc = device_get_softc(dev); 108 sc->dev = dev; 109 110 err = bus_alloc_resources(dev, pmsu_spec, &sc->res); 111 if (err != 0) { 112 device_printf(dev, "could not allocate resources\n"); 113 return (ENXIO); 114 } 115 116 return (0); 117 } 118 119 static int 120 pmsu_detach(device_t dev) 121 { 122 struct pmsu_softc *sc; 123 124 sc = device_get_softc(dev); 125 126 bus_release_resources(dev, pmsu_spec, &sc->res); 127 128 return (0); 129 } 130 131 #ifdef SMP 132 int 133 pmsu_boot_secondary_cpu(void) 134 { 135 bus_space_handle_t vaddr; 136 int rv; 137 138 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_PMSU_BASE, MV_PMSU_REGS_LEN, 139 0, &vaddr); 140 if (rv != 0) 141 return (rv); 142 143 /* Boot cpu1 */ 144 bus_space_write_4(fdtbus_bs_tag, vaddr, PMSU_BOOT_ADDR_REDIRECT_OFFSET(1), 145 pmap_kextract((vm_offset_t)mpentry)); 146 147 dcache_wbinv_poc_all(); 148 dsb(); 149 sev(); 150 151 bus_space_unmap(fdtbus_bs_tag, vaddr, MV_PMSU_REGS_LEN); 152 153 return (0); 154 } 155 #endif 156