arch/arm/cpu/armv7/exynos/tzpc.c

   1 /*
   2  * Lowlevel setup for SMDK5250 board based on S5PC520
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <asm/arch/tzpc.h>
  11 #include <asm/io.h>
  12
  13 /* Setting TZPC[TrustZone Protection Controller] */
  14 void tzpc_init(void)
  15 {
  16         struct exynos_tzpc *tzpc;
  17         unsigned int addr, start = 0, end = 0;
  18
  19         start = samsung_get_base_tzpc();
  20
  21         if (cpu_is_exynos5())
  22                 end = start + ((EXYNOS5_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);
  23         else if (cpu_is_exynos4())
  24                 end = start + ((EXYNOS4_NR_TZPC_BANKS - 1) * TZPC_BASE_OFFSET);
  25
  26         for (addr = start; addr <= end; addr += TZPC_BASE_OFFSET) {
  27                 tzpc = (struct exynos_tzpc *)addr;
  28
  29                 if (addr == start)
  30                         writel(R0SIZE, &tzpc->r0size);
  31
  32                 writel(DECPROTXSET, &tzpc->decprot0set);
  33                 writel(DECPROTXSET, &tzpc->decprot1set);
  34
  35                 if (cpu_is_exynos5() && (addr == end))
  36                         break;
  37
  38                 writel(DECPROTXSET, &tzpc->decprot2set);
  39                 writel(DECPROTXSET, &tzpc->decprot3set);
  40         }
  41 }