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