diff options
Diffstat (limited to 'arch/arm/include/asm/trusted_foundations.h')
| -rw-r--r-- | arch/arm/include/asm/trusted_foundations.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/arm/include/asm/trusted_foundations.h b/arch/arm/include/asm/trusted_foundations.h new file mode 100644 index 00000000000..3bd36e2c5f2 --- /dev/null +++ b/arch/arm/include/asm/trusted_foundations.h @@ -0,0 +1,67 @@ +/* + * 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 |