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
pmsu_probe(device_t dev)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
pmsu_attach(device_t dev)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
pmsu_detach(device_t dev)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
pmsu_boot_secondary_cpu(void)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