1 /* $NetBSD: vrdsu.c,v 1.12 2015/06/09 22:46:36 matt Exp $ */
2
3 /*
4 * Copyright (c) 1999 Shin Takemura All rights reserved.
5 * Copyright (c) 1999 PocketBSD Project. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: vrdsu.c,v 1.12 2015/06/09 22:46:36 matt Exp $");
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/device.h>
35 #include <sys/systm.h>
36
37 #include <uvm/uvm_extern.h>
38
39 #include <mips/cpuregs.h>
40
41 #include <hpcmips/vr/vripif.h>
42 #include <hpcmips/vr/dsureg.h>
43 #include <hpcmips/vr/vrdsuvar.h>
44
45 struct vrdsu_softc {
46 bus_space_tag_t sc_iot;
47 bus_space_handle_t sc_ioh;
48 };
49
50 static int vrdsumatch(device_t, cfdata_t, void *);
51 static void vrdsuattach(device_t, device_t, void *);
52
53 static void vrdsu_write(struct vrdsu_softc *, int, unsigned short);
54 static unsigned short vrdsu_read(struct vrdsu_softc *, int);
55
56 CFATTACH_DECL_NEW(vrdsu, sizeof(struct vrdsu_softc),
57 vrdsumatch, vrdsuattach, NULL, NULL);
58
59 struct vrdsu_softc *the_dsu_sc = NULL;
60
61 static inline void
vrdsu_write(struct vrdsu_softc * sc,int port,unsigned short val)62 vrdsu_write(struct vrdsu_softc *sc, int port, unsigned short val)
63 {
64
65 bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
66 }
67
68 static inline unsigned short
vrdsu_read(struct vrdsu_softc * sc,int port)69 vrdsu_read(struct vrdsu_softc *sc, int port)
70 {
71
72 return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port));
73 }
74
75 static int
vrdsumatch(device_t parent,cfdata_t cf,void * aux)76 vrdsumatch(device_t parent, cfdata_t cf, void *aux)
77 {
78
79 return (1);
80 }
81
82 static void
vrdsuattach(device_t parent,device_t self,void * aux)83 vrdsuattach(device_t parent, device_t self, void *aux)
84 {
85 struct vrdsu_softc *sc = device_private(self);
86 struct vrip_attach_args *va = aux;
87
88 sc->sc_iot = va->va_iot;
89 if (bus_space_map(va->va_iot, va->va_addr, va->va_size,
90 0, &sc->sc_ioh)) {
91 printf(": can't map bus space\n");
92 return;
93 }
94 printf("\n");
95 the_dsu_sc = sc;
96 }
97
98 void
vrdsu_reset(void)99 vrdsu_reset(void)
100 {
101
102 if (the_dsu_sc) {
103 splhigh();
104 vrdsu_write(the_dsu_sc, DSUSET_REG_W, 1); /* 1 sec */
105 vrdsu_write(the_dsu_sc, DSUCNT_REG_W, DSUCNT_DSWEN);
106 /*
107 * wipe out all physical memory for clean WinCE boot.
108 */
109 memset((void *)MIPS_PHYS_TO_KSEG1(0), 0, ptoa(physmem) - 0);
110 while (1);
111 } else {
112 printf("%s(%d): There is no DSU.", __FILE__, __LINE__);
113 }
114 }
115