1/*-
2 * Copyright (c) 2006 Olivier Houchard
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
16 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR
18 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 * POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/bus.h>
33#include <sys/kernel.h>
34#include <sys/module.h>
35
36#include <machine/bus.h>
37#include <arm/xscale/i8134x/i81342reg.h>
38#include <arm/xscale/i8134x/i81342var.h>
39
40void
41i81342_sdram_bounds(bus_space_tag_t bt, bus_space_handle_t bh,
42    vm_paddr_t *start, vm_size_t *size)
43{
44	uint32_t reg;
45	int bank_nb;
46
47	reg = bus_space_read_4(bt, bh, SMC_SDBR);
48	*start = (reg & SMC_SDBR_BASEADDR_MASK);
49	reg = bus_space_read_4(bt, bh, SMC_SBSR);
50	if (reg & SMC_SBSR_BANK_NB)
51		bank_nb = 1;
52	else
53		bank_nb = 2;
54
55	*size = (reg & SMC_SBSR_BANK_SZ_MASK) * bank_nb;
56}
57