Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * common tx4927 memory interface |
3 | * | |
4 | * Author: MontaVista Software, Inc. | |
5 | * source@mvista.com | |
6 | * | |
7 | * Copyright 2001-2002 MontaVista Software Inc. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
16 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
19 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
20 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
21 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
22 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
23 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License along | |
26 | * with this program; if not, write to the Free Software Foundation, Inc., | |
27 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | */ | |
29 | ||
30 | #include <linux/init.h> | |
b29eee49 AN |
31 | #include <linux/types.h> |
32 | #include <linux/io.h> | |
255033a9 | 33 | #include <asm/txx9/tx4927.h> |
1da177e4 | 34 | |
255033a9 | 35 | static unsigned int __init tx4927_process_sdccr(u64 __iomem *addr) |
1da177e4 LT |
36 | { |
37 | u64 val; | |
38 | unsigned int sdccr_ce; | |
39 | unsigned int sdccr_bs; | |
40 | unsigned int sdccr_rs; | |
41 | unsigned int sdccr_cs; | |
42 | unsigned int sdccr_mw; | |
43 | unsigned int bs = 0; | |
44 | unsigned int rs = 0; | |
45 | unsigned int cs = 0; | |
46 | unsigned int mw = 0; | |
1da177e4 | 47 | |
255033a9 | 48 | val = __raw_readq(addr); |
1da177e4 LT |
49 | |
50 | /* MVMCP -- need #defs for these bits masks */ | |
51 | sdccr_ce = ((val & (1 << 10)) >> 10); | |
52 | sdccr_bs = ((val & (1 << 8)) >> 8); | |
53 | sdccr_rs = ((val & (3 << 5)) >> 5); | |
255033a9 | 54 | sdccr_cs = ((val & (7 << 2)) >> 2); |
1da177e4 LT |
55 | sdccr_mw = ((val & (1 << 0)) >> 0); |
56 | ||
57 | if (sdccr_ce) { | |
255033a9 AN |
58 | bs = 2 << sdccr_bs; |
59 | rs = 2048 << sdccr_rs; | |
60 | cs = 256 << sdccr_cs; | |
61 | mw = 8 >> sdccr_mw; | |
1da177e4 LT |
62 | } |
63 | ||
255033a9 | 64 | return rs * cs * mw * bs; |
1da177e4 LT |
65 | } |
66 | ||
1da177e4 LT |
67 | unsigned int __init tx4927_get_mem_size(void) |
68 | { | |
255033a9 AN |
69 | unsigned int total = 0; |
70 | int i; | |
1da177e4 | 71 | |
255033a9 AN |
72 | for (i = 0; i < ARRAY_SIZE(tx4927_sdramcptr->cr); i++) |
73 | total += tx4927_process_sdccr(&tx4927_sdramcptr->cr[i]); | |
74 | return total; | |
1da177e4 | 75 | } |