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authorRonald G. Minnich <rminnich@gmail.com>2013-08-05 15:56:37 -0700
committerPatrick Georgi <patrick@georgi-clan.de>2013-12-21 21:02:41 +0100
commitb0efbd39108928a790a346cac46d1b2364147198 (patch)
tree8809131438153a10e8529b1768b08f4bb366572a /src/cpu
parentfffbda5897059d642dd3d8facd2a14ada6da416b (diff)
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>
Diffstat (limited to 'src/cpu')
-rw-r--r--src/cpu/samsung/exynos5420/cpu.c23
-rw-r--r--src/cpu/samsung/exynos5420/cpu.h51
2 files changed, 74 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5420/cpu.c b/src/cpu/samsung/exynos5420/cpu.c
index 49e1692723..e95b438216 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 @@ static void cpu_enable(device_t dev)
exynos_displayport_init(dev, lcdbase, fb_size);
set_cpu_id();
+
+ tzpc_init();
}
static void cpu_init(device_t dev)
diff --git a/src/cpu/samsung/exynos5420/cpu.h b/src/cpu/samsung/exynos5420/cpu.h
index 8913120d1d..1cc6e6dd68 100644
--- a/src/cpu/samsung/exynos5420/cpu.h
+++ b/src/cpu/samsung/exynos5420/cpu.h
@@ -92,6 +92,31 @@
/* Distance between each Trust Zone PC register set */
#define TZPC_BASE_OFFSET 0x10000
+/* TZPC : Register Offsets */
+#define TZPC0_BASE 0x10100000
+#define TZPC1_BASE 0x10110000
+#define TZPC2_BASE 0x10120000
+#define TZPC3_BASE 0x10130000
+#define TZPC4_BASE 0x10140000
+#define TZPC5_BASE 0x10150000
+#define TZPC6_BASE 0x10160000
+#define TZPC7_BASE 0x10170000
+#define TZPC8_BASE 0x10180000
+#define TZPC9_BASE 0x10190000
+#define TZPC10_BASE 0x100E0000
+#define TZPC11_BASE 0x100F0000
+
+/*
+ * TZPC Register Value :
+ * R0SIZE: 0x0 : Size of secured ram
+ */
+#define R0SIZE 0x0
+
+/*
+ * TZPC Decode Protection Register Value :
+ * DECPROTXSET: 0xFF : Set Decode region to non-secure
+ */
+#define DECPROTXSET 0xFF
/* EXYNOS5420 Common*/
#define EXYNOS5420_I2C_SPACING 0x10000
@@ -207,6 +232,32 @@ extern struct tmu_info exynos5420_tmu_info;
#define RAM_BASE_KB (CONFIG_SYS_SDRAM_BASE >> 10)
#define RAM_SIZE_KB (CONFIG_DRAM_SIZE_MB << 10UL)
+struct exynos_tzpc {
+ u32 r0size;
+ u8 res1[0x7FC];
+ u32 decprot0stat;
+ u32 decprot0set;
+ u32 decprot0clr;
+ u32 decprot1stat;
+ u32 decprot1set;
+ u32 decprot1clr;
+ u32 decprot2stat;
+ u32 decprot2set;
+ u32 decprot2clr;
+ u32 decprot3stat;
+ u32 decprot3set;
+ u32 decprot3clr;
+ u8 res2[0x7B0];
+ u32 periphid0;
+ u32 periphid1;
+ u32 periphid2;
+ u32 periphid3;
+ u32 pcellid0;
+ u32 pcellid1;
+ u32 pcellid2;
+ u32 pcellid3;
+};
+
static inline u32 get_fb_base_kb(void)
{
return RAM_BASE_KB + RAM_SIZE_KB - FB_SIZE_KB;