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authorJiri Kosina <jkosina@suse.cz>2014-02-20 14:54:28 +0100
committerJiri Kosina <jkosina@suse.cz>2014-02-20 14:54:28 +0100
commitd4263348f796f29546f90802177865dd4379dd0a (patch)
treeadcbdaebae584eee2f32fab95e826e8e49eef385 /arch/arm/include/asm/trusted_foundations.h
parentDocumentation: update URL to hfsplus Technote 1150 (diff)
parentLinux 3.14-rc3 (diff)
downloadlinux-d4263348f796f29546f90802177865dd4379dd0a.tar.xz
linux-d4263348f796f29546f90802177865dd4379dd0a.zip
Merge branch 'master' into for-next
Diffstat (limited to 'arch/arm/include/asm/trusted_foundations.h')
-rw-r--r--arch/arm/include/asm/trusted_foundations.h67
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diff --git a/arch/arm/include/asm/trusted_foundations.h b/arch/arm/include/asm/trusted_foundations.h
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+/*
+ * Copyright (c) 2013, NVIDIA Corporation.
+ *
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+/*
+ * Support for the Trusted Foundations secure monitor.
+ *
+ * Trusted Foundation comes active on some ARM consumer devices (most
+ * Tegra-based devices sold on the market are concerned). Such devices can only
+ * perform some basic operations, like setting the CPU reset vector, through
+ * SMC calls to the secure monitor. The calls are completely specific to
+ * Trusted Foundations, and do *not* follow the SMC calling convention or the
+ * PSCI standard.
+ */
+
+#ifndef __ASM_ARM_TRUSTED_FOUNDATIONS_H
+#define __ASM_ARM_TRUSTED_FOUNDATIONS_H
+
+#include <linux/kconfig.h>
+#include <linux/printk.h>
+#include <linux/bug.h>
+#include <linux/of.h>
+
+struct trusted_foundations_platform_data {
+ unsigned int version_major;
+ unsigned int version_minor;
+};
+
+#if IS_ENABLED(CONFIG_TRUSTED_FOUNDATIONS)
+
+void register_trusted_foundations(struct trusted_foundations_platform_data *pd);
+void of_register_trusted_foundations(void);
+
+#else /* CONFIG_TRUSTED_FOUNDATIONS */
+
+static inline void register_trusted_foundations(
+ struct trusted_foundations_platform_data *pd)
+{
+ /*
+ * If we try to register TF, this means the system needs it to continue.
+ * Its absence if thus a fatal error.
+ */
+ panic("No support for Trusted Foundations, stopping...\n");
+}
+
+static inline void of_register_trusted_foundations(void)
+{
+ /*
+ * If we find the target should enable TF but does not support it,
+ * fail as the system won't be able to do much anyway
+ */
+ if (of_find_compatible_node(NULL, NULL, "tl,trusted-foundations"))
+ register_trusted_foundations(NULL);
+}
+#endif /* CONFIG_TRUSTED_FOUNDATIONS */
+
+#endif