1 /*
2  * arch/mips/sni/pcimt_scache.c
3  *
4  * This file is subject to the terms and conditions of the GNU General Public
5  * License.  See the file "COPYING" in the main directory of this archive
6  * for more details.
7  *
8  * Copyright (c) 1997, 1998 by Ralf Baechle
9  */
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <asm/bcache.h>
13 #include <asm/sni.h>
14 
15 #define cacheconf (*(volatile unsigned int *)PCIMT_CACHECONF)
16 #define invspace (*(volatile unsigned int *)PCIMT_INVSPACE)
17 
sni_pcimt_sc_init(void)18 void __init sni_pcimt_sc_init(void)
19 {
20 	unsigned int scsiz, sc_size;
21 
22 	scsiz = cacheconf & 7;
23 	if (scsiz == 0) {
24 		printk("Second level cache is deactived.\n");
25 		return;
26 	}
27 	if (scsiz >= 6) {
28 		printk("Invalid second level cache size configured, "
29 		       "deactivating second level cache.\n");
30 		cacheconf = 0;
31 		return;
32 	}
33 
34 	sc_size = 128 << scsiz;
35 	printk("%dkb second level cache detected, deactivating.\n", sc_size);
36 	cacheconf = 0;
37 }
38