1 /* $NetBSD: i80321_mcu.c,v 1.4 2011/07/01 20:32:51 dyoung Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Intel i80321 I/O Processor memory controller support.
40 */
41
42 #include <sys/cdefs.h>
43 __KERNEL_RCSID(0, "$NetBSD: i80321_mcu.c,v 1.4 2011/07/01 20:32:51 dyoung Exp $");
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47
48 #include <sys/bus.h>
49
50 #include <arm/xscale/i80321reg.h>
51 #include <arm/xscale/i80321var.h>
52
53 /*
54 * i80321_sdram_bounds:
55 *
56 * Retrieve the start and size of SDRAM.
57 */
58 void
i80321_sdram_bounds(bus_space_tag_t st,bus_space_handle_t sh,paddr_t * start,psize_t * size)59 i80321_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh,
60 paddr_t *start, psize_t *size)
61 {
62 uint32_t sdbr, sbr0, sbr1;
63 uint32_t bank0, bank1;
64
65 sdbr = bus_space_read_4(st, sh, MCU_SDBR);
66 sbr0 = bus_space_read_4(st, sh, MCU_SBR0);
67 sbr1 = bus_space_read_4(st, sh, MCU_SBR1);
68
69 #ifdef VERBOSE_INIT_ARM
70 printf("i80321: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n",
71 sdbr, sbr0, sbr1);
72 #endif
73
74 *start = sdbr;
75
76 sdbr = (sdbr >> 25) & 0x1f;
77
78 sbr0 &= 0x3f;
79 sbr1 &= 0x3f;
80
81 bank0 = (sbr0 - sdbr) << 25;
82 bank1 = (sbr1 - sbr0) << 25;
83
84 #ifdef VERBOSE_INIT_ARM
85 printf("i80321: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1);
86 #endif
87
88 *size = bank0 + bank1;
89 }
90