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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293/* SPDX-License-Identifier: GPL-2.0-or-later *//* * Copyright (c) 2013, NVIDIA Corporation. */
/* * 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 __FIRMWARE_TRUSTED_FOUNDATIONS_H#define __FIRMWARE_TRUSTED_FOUNDATIONS_H
#include <linux/printk.h>#include <linux/bug.h>#include <linux/of.h>#include <linux/cpu.h>#include <linux/smp.h>#include <linux/types.h>
#include <asm/hardware/cache-l2x0.h>#include <asm/outercache.h>
#define TF_PM_MODE_LP0 0#define TF_PM_MODE_LP1 1#define TF_PM_MODE_LP1_NO_MC_CLK 2#define TF_PM_MODE_LP2 3#define TF_PM_MODE_LP2_NOFLUSH_L2 4#define TF_PM_MODE_NONE 5
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);bool trusted_foundations_registered(void);
#else /* CONFIG_TRUSTED_FOUNDATIONS */static inline void tf_dummy_write_sec(unsigned long val, unsigned int reg){}
static inline void register_trusted_foundations( struct trusted_foundations_platform_data *pd){ /* * If the system requires TF and we cannot provide it, continue booting * but disable features that cannot be provided. */ pr_err("No support for Trusted Foundations, continuing in degraded mode.\n"); pr_err("Secondary processors as well as CPU PM will be disabled.\n");#if IS_ENABLED(CONFIG_CACHE_L2X0) pr_err("L2X0 cache will be kept disabled.\n"); outer_cache.write_sec = tf_dummy_write_sec;#endif#if IS_ENABLED(CONFIG_SMP) setup_max_cpus = 0;#endif cpu_idle_poll_ctrl(true);}
static inline void of_register_trusted_foundations(void){ struct device_node *np = of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations");
if (!np) return; of_node_put(np); /* * 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 */ register_trusted_foundations(NULL);}
static inline bool trusted_foundations_registered(void){ return false;}#endif /* CONFIG_TRUSTED_FOUNDATIONS */
#endif