/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _AVM_TZ_H
#define _AVM_TZ_H

#include "avm_smc_ids.h"

/*
 * AVM TrustZone feature detection: Use these macros and this function to detect
 * at runtime which TrustZone features are supported by the TZ currently in use.
 */

#define AVM_TZ_IS_AVM_TZ         BIT(0)
#define AVM_TZ_FEAT_FIQ          BIT(1)
#define AVM_TZ_FEAT_FIQ_PREEMPT  BIT(2)
#define AVM_TZ_FEAT_SECURE_WDT   BIT(3)
#define AVM_TZ_FEAT_ATF_LAST_LOG BIT(4)

#ifndef CONFIG_AVM_TZ_EXTENSIONS
static inline uint64_t avm_tz_supported_features(void)
{
	return 0;
};
static inline bool avm_get_tz_version(char *buffer, size_t size)
{
	return false;
};
#else
uint64_t avm_tz_supported_features(void);
bool avm_get_tz_version(char *buffer, size_t size);
#endif

/*
 * The TZ version is a string in the shape
 *
 * v0.v1.v2.v3.v4[-M]
 *
 * where
 *
 * v0-v4 can be any decimal numbers (as long as the entire string fits in 32
 * bytes, including the null terminator),
 *
 * -M is optional and specifies whether the TrustZone contains code changes made
 * since the last tag.
 */
#define AVM_TZ_VERSION_SIZE 32

#ifdef CONFIG_AVM_FASTIRQ_TZ

void avm_tz_set_fiq_handler(void *address, void *reg_save);
void avm_tz_disable_fiq_handling_in_linux(void *unused);
void avm_tz_enable_fiq_handling_in_linux(void *unused);
void avm_secure_wdt_pet(void);
void avm_secure_wdt_config(u32 enable, u32 bark_ms, u32 bite_ms);
#ifdef CONFIG_AVM_TZ_TYPE_ATF_RTE
int avm_get_atf_last_log(void *ker_buf, u32 buf_len);
#else
static inline int avm_get_atf_last_log(void *ker_buf, u32 buf_len) { return 0; };
#endif
#endif /* CONFIG_AVM_FASTIRQ_TZ */

#endif /* _AVM_TZ_H */