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Based on 3 normalized pattern(s): 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 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 [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] 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 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 [author] [graeme] [gregory] [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i] [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema] [hk] [hemahk]@[ti] [com] 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1105 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (c) 2013, NVIDIA Corporation.
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*/
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/*
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* Support for the Trusted Foundations secure monitor.
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*
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* Trusted Foundation comes active on some ARM consumer devices (most
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* Tegra-based devices sold on the market are concerned). Such devices can only
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* perform some basic operations, like setting the CPU reset vector, through
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* SMC calls to the secure monitor. The calls are completely specific to
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* Trusted Foundations, and do *not* follow the SMC calling convention or the
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* PSCI standard.
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*/
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#ifndef __FIRMWARE_TRUSTED_FOUNDATIONS_H
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#define __FIRMWARE_TRUSTED_FOUNDATIONS_H
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#include <linux/printk.h>
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#include <linux/bug.h>
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#include <linux/of.h>
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#include <linux/cpu.h>
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#include <linux/smp.h>
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#include <linux/types.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <asm/outercache.h>
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#define TF_PM_MODE_LP0 0
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#define TF_PM_MODE_LP1 1
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#define TF_PM_MODE_LP1_NO_MC_CLK 2
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#define TF_PM_MODE_LP2 3
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#define TF_PM_MODE_LP2_NOFLUSH_L2 4
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struct trusted_foundations_platform_data {
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unsigned int version_major;
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unsigned int version_minor;
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};
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#if IS_ENABLED(CONFIG_TRUSTED_FOUNDATIONS)
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void register_trusted_foundations(struct trusted_foundations_platform_data *pd);
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void of_register_trusted_foundations(void);
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bool trusted_foundations_registered(void);
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#else /* CONFIG_TRUSTED_FOUNDATIONS */
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static inline void tf_dummy_write_sec(unsigned long val, unsigned int reg)
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{
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}
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static inline void register_trusted_foundations(
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struct trusted_foundations_platform_data *pd)
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{
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/*
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* If the system requires TF and we cannot provide it, continue booting
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* but disable features that cannot be provided.
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*/
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pr_err("No support for Trusted Foundations, continuing in degraded mode.\n");
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pr_err("Secondary processors as well as CPU PM will be disabled.\n");
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#if IS_ENABLED(CONFIG_CACHE_L2X0)
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pr_err("L2X0 cache will be kept disabled.\n");
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outer_cache.write_sec = tf_dummy_write_sec;
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#endif
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#if IS_ENABLED(CONFIG_SMP)
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setup_max_cpus = 0;
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#endif
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cpu_idle_poll_ctrl(true);
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}
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static inline void of_register_trusted_foundations(void)
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{
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/*
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* If we find the target should enable TF but does not support it,
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* fail as the system won't be able to do much anyway
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*/
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if (of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations"))
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register_trusted_foundations(NULL);
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}
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static inline bool trusted_foundations_registered(void)
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{
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return false;
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}
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#endif /* CONFIG_TRUSTED_FOUNDATIONS */
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#endif
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