1 /* $NetBSD: i80321_mcu.c,v 1.2 2003/07/15 00:24:54 lukem 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 __FBSDID("$FreeBSD: releng/9.0/sys/arm/xscale/i80321/i80321_mcu.c 139735 2005-01-05 21:58:49Z imp $");
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/bus.h>
48
49 #include <machine/bus.h>
50
51 #include <arm/xscale/i80321/i80321reg.h>
52 #include <arm/xscale/i80321/i80321var.h>
53
54 /*
55 * i80321_sdram_bounds:
56 *
57 * Retrieve the start and size of SDRAM.
58 */
59 void
60 i80321_sdram_bounds(bus_space_tag_t st, bus_space_handle_t sh,
61 vm_paddr_t *start, vm_size_t *size)
62 {
63 uint32_t sdbr, sbr0, sbr1;
64 uint32_t bank0, bank1;
65
66 sdbr = bus_space_read_4(st, sh, MCU_SDBR);
67 sbr0 = bus_space_read_4(st, sh, MCU_SBR0);
68 sbr1 = bus_space_read_4(st, sh, MCU_SBR1);
69
70 #ifdef VERBOSE_INIT_ARM
71 printf("i80321: SBDR = 0x%08x SBR0 = 0x%08x SBR1 = 0x%08x\n",
72 sdbr, sbr0, sbr1);
73 #endif
74
75 *start = sdbr;
76
77 sdbr = (sdbr >> 25) & 0x1f;
78
79 sbr0 &= 0x3f;
80 sbr1 &= 0x3f;
81
82 bank0 = (sbr0 - sdbr) << 25;
83 bank1 = (sbr1 - sbr0) << 25;
84
85 #ifdef VERBOSE_INIT_ARM
86 printf("i80321: BANK0 = 0x%08x BANK1 = 0x%08x\n", bank0, bank1);
87 #endif
88
89 *size = bank0 + bank1;
90 }
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