arch/cris/arch-v32/mm/l2cache.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/init.h>
   3 #include <linux/kernel.h>
   4 #include <linux/string.h>
   5 #include <memmap.h>
   6 #include <hwregs/reg_map.h>
   7 #include <hwregs/reg_rdwr.h>
   8 #include <hwregs/l2cache_defs.h>
   9 #include <asm/io.h>
  10
  11 #define L2CACHE_SIZE 64
  12
  13 int __init l2cache_init(void)
  14 {
  15         reg_l2cache_rw_ctrl ctrl = {0};
  16         reg_l2cache_rw_cfg cfg = {.en = regk_l2cache_yes};
  17
  18         ctrl.csize = L2CACHE_SIZE;
  19         ctrl.cbase = L2CACHE_SIZE / 4 + (L2CACHE_SIZE % 4 ? 1 : 0);
  20         REG_WR(l2cache, regi_l2cache, rw_ctrl, ctrl);
  21
  22         /* Flush the tag memory */
  23         memset((void *)(MEM_INTMEM_START | MEM_NON_CACHEABLE), 0, 2*1024);
  24
  25         /* Enable the cache */
  26         REG_WR(l2cache, regi_l2cache, rw_cfg, cfg);
  27
  28         return 0;
  29 }
  30