z3rambd.c revision 1.5 
1/*	$NetBSD: z3rambd.c,v 1.5 2021/08/07 16:18:42 thorpej Exp $ */
2
3/*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Radoslaw Kujawa.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: z3rambd.c,v 1.5 2021/08/07 16:18:42 thorpej Exp $");
34
35/*
36 * Z3 RAM virtual block device. Supports ZorRAM, BigRamPlus and FastLane Z3 so
37 * far.
38 */
39
40#include <sys/param.h>
41#include <sys/device.h>
42#include <sys/malloc.h>
43#include <sys/socket.h>
44#include <sys/systm.h>
45
46#include <machine/cpu.h>
47
48#include <amiga/dev/zbusvar.h>
49#include <amiga/dev/z3rambdvar.h>
50
51#include <dev/altmem/altmemvar.h>
52
53static int	z3rambd_match(device_t, cfdata_t , void *);
54static void	z3rambd_attach(device_t, device_t, void *);
55
56static int	z3rambd_altmem_print(void *, const char *);
57
58static void	z3rambd_altmem_strategy(void *, struct buf *);
59static size_t	z3rambd_altmem_getsize(void *);
60
61static const struct altmem_memops z3rambd_altmem_memops = {
62	.getsize = z3rambd_altmem_getsize,
63	.strategy = z3rambd_altmem_strategy
64};
65
66CFATTACH_DECL_NEW(z3rambd, sizeof(struct z3rambd_softc),
67    z3rambd_match, z3rambd_attach, NULL, NULL);
68
69int
70z3rambd_match(device_t parent, cfdata_t cf, void *aux)
71{
72	struct zbus_args *zap;
73	zap = aux;
74
75	if (z3rambd_match_id(zap->manid, zap->prodid) > 0)
76		return 100;
77
78	return 0;
79}
80
81void
82z3rambd_attach(device_t parent, device_t self, void *aux)
83{
84	struct z3rambd_softc *sc;
85	struct zbus_args *zap;
86	struct altmem_attach_args aaa;
87
88	sc = device_private(self);
89	sc->sc_dev = self;
90	zap = aux;
91
92	sc->sc_bst.base = (bus_addr_t)zap->va;
93	sc->sc_bst.absm = &amiga_bus_stride_1;
94	sc->sc_iot = &sc->sc_bst;
95
96	/* XXX: duh, size of the board does not necessarily equal mem size */
97	sc->sc_size = zap->size;
98
99	if (zap->prodid == ZORRO_PRODID_ZORRAM)
100		aprint_normal(": AmigaKit ZorRAM / Individual Computers BigRamPlus\n");
101	else if (zap->prodid == ZORRO_PRODID_3128)
102		aprint_normal(": DKB 3128\n");
103	else if (zap->prodid == ZORRO_PRODID_FLZ3MEM)
104		aprint_normal(": FastLane Z3 memory\n");
105	else
106		aprint_normal("\n");
107
108	if (bus_space_map(sc->sc_iot, 0, sc->sc_size, 0,
109	    &sc->sc_ioh)) {
110		aprint_error_dev(sc->sc_dev, "can't map the RAM\n");
111	}
112
113	sc->sc_va = bus_space_vaddr(sc->sc_iot, sc->sc_ioh);
114
115	aaa.cookie = sc;
116	aaa.memops = &z3rambd_altmem_memops;
117	config_found(self, &aaa, z3rambd_altmem_print, CFARGS_NONE);
118}
119
120static int
121z3rambd_altmem_print(void *aux, const char *pnp)
122{
123	if (pnp)
124		aprint_normal("altmem at %s", pnp);
125
126	return UNCONF;
127}
128
129/* XXX: should be rewritten using bus_space_read_region? */
130static void
131z3rambd_altmem_strategy(void *aux, struct buf *bp)
132{
133	struct z3rambd_softc *sc = aux;
134	void *addr;
135	size_t off;
136	int s;
137
138	bp->b_resid = bp->b_bcount;
139	off = bp->b_blkno << DEV_BSHIFT;
140
141	s = splbio();
142
143	addr = (char *)((char*)sc->sc_va + off);
144#ifdef Z3RAMBD_DEBUG
145	aprint_normal_dev(sc->sc_dev,"stratetgy at %x %x\n", (bus_addr_t) addr,
146	    (bus_addr_t) kvtop(addr));
147#endif /* Z3RAMBD_DEBUG */
148
149	if (bp->b_flags & B_READ)
150		memcpy((char *)bp->b_data, addr, bp->b_resid);
151	else
152		memcpy(addr, (char *)bp->b_data, bp->b_resid);
153
154	splx(s);
155}
156
157static size_t
158z3rambd_altmem_getsize(void *aux)
159{
160	struct z3rambd_softc *sc = aux;
161	return sc->sc_size;
162}
163