| Alexandre Courbot | d9a1bea | 2013-11-24 15:30:46 +0900 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2013, NVIDIA Corporation. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | * more details. |
| 13 | */ |
| 14 | |
| 15 | /* |
| 16 | * Support for the Trusted Foundations secure monitor. |
| 17 | * |
| 18 | * Trusted Foundation comes active on some ARM consumer devices (most |
| 19 | * Tegra-based devices sold on the market are concerned). Such devices can only |
| 20 | * perform some basic operations, like setting the CPU reset vector, through |
| 21 | * SMC calls to the secure monitor. The calls are completely specific to |
| 22 | * Trusted Foundations, and do *not* follow the SMC calling convention or the |
| 23 | * PSCI standard. |
| 24 | */ |
| 25 | |
| 26 | #ifndef __ASM_ARM_TRUSTED_FOUNDATIONS_H |
| 27 | #define __ASM_ARM_TRUSTED_FOUNDATIONS_H |
| 28 | |
| 29 | #include <linux/kconfig.h> |
| 30 | #include <linux/printk.h> |
| 31 | #include <linux/bug.h> |
| 32 | #include <linux/of.h> |
| 33 | |
| 34 | struct trusted_foundations_platform_data { |
| 35 | unsigned int version_major; |
| 36 | unsigned int version_minor; |
| 37 | }; |
| 38 | |
| 39 | #if IS_ENABLED(CONFIG_TRUSTED_FOUNDATIONS) |
| 40 | |
| 41 | void register_trusted_foundations(struct trusted_foundations_platform_data *pd); |
| 42 | void of_register_trusted_foundations(void); |
| 43 | |
| 44 | #else /* CONFIG_TRUSTED_FOUNDATIONS */ |
| 45 | |
| 46 | static inline void register_trusted_foundations( |
| 47 | struct trusted_foundations_platform_data *pd) |
| 48 | { |
| 49 | /* |
| 50 | * If we try to register TF, this means the system needs it to continue. |
| 51 | * Its absence if thus a fatal error. |
| 52 | */ |
| 53 | panic("No support for Trusted Foundations, stopping...\n"); |
| 54 | } |
| 55 | |
| 56 | static inline void of_register_trusted_foundations(void) |
| 57 | { |
| 58 | /* |
| 59 | * If we find the target should enable TF but does not support it, |
| 60 | * fail as the system won't be able to do much anyway |
| 61 | */ |
| 62 | if (of_find_compatible_node(NULL, NULL, "tl,trusted-foundations")) |
| 63 | register_trusted_foundations(NULL); |
| 64 | } |
| 65 | #endif /* CONFIG_TRUSTED_FOUNDATIONS */ |
| 66 | |
| 67 | #endif |