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("$FreeBSD$");
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 */
59void
60i80321_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}
91