arch/arm/mach-bcm/kona.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 #include <linux/of_platform.h>
  15 #include <asm/hardware/cache-l2x0.h>
  16
  17 #include "bcm_kona_smc.h"
  18 #include "kona.h"
  19
  20 void __init kona_l2_cache_init(void)
  21 {
  22         unsigned int result;
  23         int ret;
  24
  25         if (!IS_ENABLED(CONFIG_CACHE_L2X0))
  26                 return;
  27
  28         ret = bcm_kona_smc_init();
  29         if (ret) {
  30                 pr_info("Secure API not available (%d). Skipping L2 init.\n",
  31                         ret);
  32                 return;
  33         }
  34
  35         result = bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
  36         if (result != SEC_ROM_RET_OK) {
  37                 pr_err("Secure Monitor call failed (%u)! Skipping L2 init.\n",
  38                         result);
  39                 return;
  40         }
  41
  42         /*
  43          * The aux_val and aux_mask have no effect since L2 cache is already
  44          * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
  45          */
  46         ret = l2x0_of_init(0, ~0);
  47         if (ret)
  48                 pr_err("Couldn't enable L2 cache: %d\n", ret);
  49 }