Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * arch/ppc/boot/common/cpc700_memory.c |
| 3 | * |
| 4 | * Find memory based upon settings in the CPC700 bridge |
| 5 | * |
| 6 | * Author: Dan Cox |
| 7 | * |
| 8 | * 2001-2002 (c) MontaVista, Software, Inc. This file is licensed under |
| 9 | * the terms of the GNU General Public License version 2. This program |
| 10 | * is licensed "as is" without any warranty of any kind, whether express |
| 11 | * or implied. |
| 12 | */ |
| 13 | |
| 14 | #include <asm/types.h> |
| 15 | #include <asm/io.h> |
| 16 | #include "cpc700.h" |
| 17 | |
| 18 | unsigned long |
| 19 | cpc700_get_mem_size(void) |
| 20 | { |
| 21 | int i; |
| 22 | unsigned long len, amt; |
| 23 | |
| 24 | /* Start at MB1EA, since MB0EA will most likely be the ending address |
| 25 | for ROM space. */ |
| 26 | for(len = 0, i = CPC700_MB1EA; i <= CPC700_MB4EA; i+=4) { |
| 27 | amt = cpc700_read_memreg(i); |
| 28 | if (amt == 0) |
| 29 | break; |
| 30 | len = amt; |
| 31 | } |
| 32 | |
| 33 | return len; |
| 34 | } |
| 35 | |
| 36 | |