src/soc/samsung/exynos5420/trustzone.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/mmio.h>
   4 #include <soc/trustzone.h>
   5
   6 /* Setting TZPC[TrustZone Protection Controller]
   7  * We pretty much disable it all, as the kernel
   8  * expects it that way -- and that's not the default.
   9  */
  10 void trustzone_init(void)
  11 {
  12         struct exynos_tzpc *tzpc;
  13         unsigned int addr;
  14
  15         for (addr = TZPC10_BASE; addr <= TZPC9_BASE; addr += TZPC_BASE_OFFSET) {
  16                 tzpc = (struct exynos_tzpc *)addr;
  17                 if (addr == TZPC0_BASE)
  18                         write32(&tzpc->r0size, R0SIZE);
  19                 write32(&tzpc->decprot0set, DECPROTXSET);
  20                 write32(&tzpc->decprot1set, DECPROTXSET);
  21                 write32(&tzpc->decprot2set, DECPROTXSET);
  22                 write32(&tzpc->decprot3set, DECPROTXSET);
  23         }
  24 }