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
40 void
i81342_sdram_bounds(bus_space_tag_t bt,bus_space_handle_t bh,vm_paddr_t * start,vm_size_t * size)41 i81342_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