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 #include <sys/param.h> 30 #include <sys/bus.h> 31 #include <sys/conf.h> 32 #include <sys/rman.h> 33 #include <sys/types.h> 34 #include <sys/kernel.h> 35 #include <sys/module.h> 36 #include <sys/resource.h> 37 #include <sys/systm.h> 38 39 #include <vm/vm.h> 40 #include <vm/pmap.h> 41 42 #include <machine/cpu.h> 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 { 0, 0 } 71 }; 72 73 static driver_t pmsu_driver = { 74 "pmsu", 75 pmsu_methods, 76 sizeof(struct pmsu_softc) 77 }; 78 79 DRIVER_MODULE(pmsu, simplebus, pmsu_driver, 0, 0); 80 DRIVER_MODULE(pmsu, ofwbus, pmsu_driver, 0, 0); 81 82 static int 83 pmsu_probe(device_t dev) 84 { 85 86 if (!ofw_bus_status_okay(dev)) 87 return (ENXIO); 88 89 if (!ofw_bus_is_compatible(dev, "marvell,armada-380-pmsu")) 90 return (ENXIO); 91 92 device_set_desc(dev, "Power Management Service Unit"); 93 94 return (BUS_PROBE_DEFAULT); 95 } 96 97 static int 98 pmsu_attach(device_t dev) 99 { 100 struct pmsu_softc *sc; 101 int err; 102 103 sc = device_get_softc(dev); 104 sc->dev = dev; 105 106 err = bus_alloc_resources(dev, pmsu_spec, &sc->res); 107 if (err != 0) { 108 device_printf(dev, "could not allocate resources\n"); 109 return (ENXIO); 110 } 111 112 return (0); 113 } 114 115 static int 116 pmsu_detach(device_t dev) 117 { 118 struct pmsu_softc *sc; 119 120 sc = device_get_softc(dev); 121 122 bus_release_resources(dev, pmsu_spec, &sc->res); 123 124 return (0); 125 } 126 127 #ifdef SMP 128 int 129 pmsu_boot_secondary_cpu(void) 130 { 131 bus_space_handle_t vaddr; 132 int rv; 133 134 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_PMSU_BASE, MV_PMSU_REGS_LEN, 135 0, &vaddr); 136 if (rv != 0) 137 return (rv); 138 139 /* Boot cpu1 */ 140 bus_space_write_4(fdtbus_bs_tag, vaddr, PMSU_BOOT_ADDR_REDIRECT_OFFSET(1), 141 pmap_kextract((vm_offset_t)mpentry)); 142 143 dcache_wbinv_poc_all(); 144 dsb(); 145 sev(); 146 147 bus_space_unmap(fdtbus_bs_tag, vaddr, MV_PMSU_REGS_LEN); 148 149 return (0); 150 } 151 #endif 152