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 73 { 0, 0 } 74 }; 75 76 static driver_t pmsu_driver = { 77 "pmsu", 78 pmsu_methods, 79 sizeof(struct pmsu_softc) 80 }; 81 82 static devclass_t pmsu_devclass; 83 84 DRIVER_MODULE(pmsu, simplebus, pmsu_driver, pmsu_devclass, 0, 0); 85 DRIVER_MODULE(pmsu, ofwbus, pmsu_driver, pmsu_devclass, 0, 0); 86 87 static int 88 pmsu_probe(device_t dev) 89 { 90 91 if (!ofw_bus_status_okay(dev)) 92 return (ENXIO); 93 94 if (!ofw_bus_is_compatible(dev, "marvell,armada-380-pmsu")) 95 return (ENXIO); 96 97 device_set_desc(dev, "Power Management Service Unit"); 98 99 return (BUS_PROBE_DEFAULT); 100 } 101 102 static int 103 pmsu_attach(device_t dev) 104 { 105 struct pmsu_softc *sc; 106 int err; 107 108 sc = device_get_softc(dev); 109 sc->dev = dev; 110 111 err = bus_alloc_resources(dev, pmsu_spec, &sc->res); 112 if (err != 0) { 113 device_printf(dev, "could not allocate resources\n"); 114 return (ENXIO); 115 } 116 117 return (0); 118 } 119 120 static int 121 pmsu_detach(device_t dev) 122 { 123 struct pmsu_softc *sc; 124 125 sc = device_get_softc(dev); 126 127 bus_release_resources(dev, pmsu_spec, &sc->res); 128 129 return (0); 130 } 131 132 #ifdef SMP 133 int 134 pmsu_boot_secondary_cpu(void) 135 { 136 bus_space_handle_t vaddr; 137 int rv; 138 139 rv = bus_space_map(fdtbus_bs_tag, (bus_addr_t)MV_PMSU_BASE, MV_PMSU_REGS_LEN, 140 0, &vaddr); 141 if (rv != 0) 142 return (rv); 143 144 /* Boot cpu1 */ 145 bus_space_write_4(fdtbus_bs_tag, vaddr, PMSU_BOOT_ADDR_REDIRECT_OFFSET(1), 146 pmap_kextract((vm_offset_t)mpentry)); 147 148 dcache_wbinv_poc_all(); 149 dsb(); 150 sev(); 151 152 bus_space_unmap(fdtbus_bs_tag, vaddr, MV_PMSU_REGS_LEN); 153 154 return (0); 155 } 156 #endif 157