arch/arm/mach-bcm/kona_l2_cache.c

   1 /*
   2  * Copyright (C) 2012-2014 Broadcom Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation version 2.
   7  *
   8  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
   9  * kind, whether express or implied; without even the implied warranty
  10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14
  15 #include <linux/init.h>
  16 #include <linux/printk.h>
  17 #include <asm/hardware/cache-l2x0.h>
  18
  19 #include "bcm_kona_smc.h"
  20
  21 void __init kona_l2_cache_init(void)
  22 {
  23         unsigned int result;
  24         int ret;
  25
  26         ret = bcm_kona_smc_init();
  27         if (ret) {
  28                 pr_info("Secure API not available (%d). Skipping L2 init.\n",
  29                         ret);
  30                 return;
  31         }
  32
  33         result = bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
  34         if (result != SEC_ROM_RET_OK) {
  35                 pr_err("Secure Monitor call failed (%u)! Skipping L2 init.\n",
  36                         result);
  37                 return;
  38         }
  39
  40         /*
  41          * The aux_val and aux_mask have no effect since L2 cache is already
  42          * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
  43          */
  44         ret = l2x0_of_init(0, ~0);
  45         if (ret)
  46                 pr_err("Couldn't enable L2 cache: %d\n", ret);
  47 }