Pit: correctly initialize trust zone
This ensures that various trust zone things are reset,
which is important because the kernel assumes they are.
Change-Id: Ie02ea89885621f58a3ccc4f1729617208a264153
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/64697
Tested-by: Ronald G. Minnich <rminnich@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/4430
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/cpu/samsung/exynos5420/cpu.c b/src/cpu/samsung/exynos5420/cpu.c
index 49e1692..e95b438 100644
--- a/src/cpu/samsung/exynos5420/cpu.c
+++ b/src/cpu/samsung/exynos5420/cpu.c
@@ -2,6 +2,7 @@
* This file is part of the coreboot project.
*
* Copyright 2013 Google Inc.
+ * Copyright (C) 2012 Samsung Electronics
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -35,6 +36,26 @@
static unsigned int cpu_id;
static unsigned int cpu_rev;
+/* Setting TZPC[TrustZone Protection Controller]
+ * We pretty much disable it all, as the kernel
+ * expects it that way -- and that's not the default.
+ */
+static void tzpc_init(void)
+{
+ struct exynos_tzpc *tzpc;
+ unsigned int addr;
+
+ for (addr = TZPC10_BASE; addr <= TZPC9_BASE; addr += TZPC_BASE_OFFSET) {
+ tzpc = (struct exynos_tzpc *)addr;
+ if (addr == TZPC0_BASE)
+ writel(R0SIZE, &tzpc->r0size);
+ writel(DECPROTXSET, &tzpc->decprot0set);
+ writel(DECPROTXSET, &tzpc->decprot1set);
+ writel(DECPROTXSET, &tzpc->decprot2set);
+ writel(DECPROTXSET, &tzpc->decprot3set);
+ }
+}
+
static void set_cpu_id(void)
{
u32 pro_id = (read32((void *)EXYNOS_PRO_ID) & 0x00FFF000) >> 12;
@@ -133,6 +154,8 @@
exynos_displayport_init(dev, lcdbase, fb_size);
set_cpu_id();
+
+ tzpc_init();
}
static void cpu_init(device_t dev)