arch/mips/sni/pcimt_scache.c

   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
  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 }