Patrick Georgi (patrick@georgi-clan.de) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4430
-gerrit
commit f7bae4bdf1fa6668228900a4976c21bbde2ef6bf Author: Ronald G. Minnich rminnich@gmail.com Date: Mon Aug 5 15:56:37 2013 -0700
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 --- src/cpu/samsung/exynos5420/cpu.c | 23 ++++++++++++++++++ src/cpu/samsung/exynos5420/cpu.h | 51 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 74 insertions(+)
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 @@ 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 8913120..1cc6e6d 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;