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/param.h> 29 #include <sys/bus.h> 30 #include <sys/conf.h> 31 #include <sys/rman.h> 32 #include <sys/types.h> 33 #include <sys/kernel.h> 34 #include <sys/module.h> 35 #include <sys/resource.h> 36 #include <sys/systm.h> 37 38 #include <vm/vm.h> 39 #include <vm/pmap.h> 40 41 #include <machine/cpu.h> 42 #include <machine/fdt.h> 43 #include <machine/smp.h> 44 45 #include <dev/ofw/ofw_bus_subr.h> 46 47 #include <arm/mv/mvreg.h> 48 49 #include "pmsu.h" 50 51 static struct resource_spec pmsu_spec[] = { 52 { SYS_RES_MEMORY, 0, RF_ACTIVE }, 53 { -1, 0 } 54 }; 55 56 struct pmsu_softc { 57 device_t dev; 58 struct resource *res; 59 }; 60 61 static int pmsu_probe(device_t dev); 62 static int pmsu_attach(device_t dev); 63 static int pmsu_detach(device_t dev); 64 65 static device_method_t pmsu_methods[] = { 66 DEVMETHOD(device_probe, pmsu_probe), 67 DEVMETHOD(device_attach, pmsu_attach), 68 DEVMETHOD(device_detach, pmsu_detach), 69 { 0, 0 } 70 }; 71 72 static driver_t pmsu_driver = { 73 "pmsu", 74 pmsu_methods, 75 sizeof(struct pmsu_softc) 76 }; 77 78 DRIVER_MODULE(pmsu, simplebus, pmsu_driver, 0, 0); 79 DRIVER_MODULE(pmsu, ofwbus, pmsu_driver, 0, 0); 80 81 static int 82 pmsu_probe(device_t dev) 83 { 84 85 if (!ofw_bus_status_okay(dev)) 86 return (ENXIO); 87 88 if (!ofw_bus_is_compatible(dev, "marvell,armada-380-pmsu")) 89 return (ENXIO); 90 91 device_set_desc(dev, "Power Management Service Unit"); 92 93 return (BUS_PROBE_DEFAULT); 94 } 95 96 static int 97 pmsu_attach(device_t dev) 98 { 99 struct pmsu_softc *sc; 100 int err; 101 102 sc = device_get_softc(dev); 103 sc->dev = dev; 104 105 err = bus_alloc_resources(dev, pmsu_spec, &sc->res); 106 if (err != 0) { 107 device_printf(dev, "could not allocate resources\n"); 108 return (ENXIO); 109 } 110 111 return (0); 112 } 113 114 static int 115 pmsu_detach(device_t dev) 116 { 117 struct pmsu_softc *sc; 118 119 sc = device_get_softc(dev); 120 121 bus_release_resources(dev, pmsu_spec, &sc->res); 122 123 return (0); 124 } 125 126 #ifdef SMP 127 int 128 pmsu_boot_secondary_cpu(void) 129 { 130 bus_space_handle_t vaddr; 131 int rv; 132 133 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_PMSU_BASE, MV_PMSU_REGS_LEN, 134 0, &vaddr); 135 if (rv != 0) 136 return (rv); 137 138 /* Boot cpu1 */ 139 bus_space_write_4(fdtbus_bs_tag, vaddr, PMSU_BOOT_ADDR_REDIRECT_OFFSET(1), 140 pmap_kextract((vm_offset_t)mpentry)); 141 142 dcache_wbinv_poc_all(); 143 dsb(); 144 sev(); 145 146 bus_space_unmap(fdtbus_bs_tag, vaddr, MV_PMSU_REGS_LEN); 147 148 return (0); 149 } 150 #endif 151