// SPDX-License-Identifier: BSD-2-Clause
/*
 * Copyright (c) 2016, Linaro Limited
 * Copyright (c) 2014, STMicroelectronics International N.V.
 */
#include <arm.h>
#include <compiler.h>
#include <kernel/misc.h>
#include <platform_config.h>
#include <sm/optee_smc.h>
#include <sm/sm.h>
#include <sm/std_smc.h>
#include <string.h>
#include "sm_private.h"

bool sm_from_nsec(struct sm_ctx *ctx)
{
	uint32_t *nsec_r0 = (uint32_t *)(&ctx->nsec.r0);

	if (!sm_platform_handler(ctx))
		return false;

#ifdef CFG_PSCI_ARM32
	if (OPTEE_SMC_OWNER_NUM(*nsec_r0) == OPTEE_SMC_OWNER_STANDARD) {
		smc_std_handler((struct thread_smc_args *)nsec_r0, &ctx->nsec);
		return false;	/* Return to non secure state */
	}
#endif

	sm_save_modes_regs(&ctx->nsec.mode_regs);
	sm_restore_modes_regs(&ctx->sec.mode_regs);

	memcpy(&ctx->sec.r0, nsec_r0, sizeof(uint32_t) * 8);
	if (OPTEE_SMC_IS_FAST_CALL(ctx->sec.r0))
		ctx->sec.mon_lr = (uint32_t)&thread_vector_table.fast_smc_entry;
	else
		ctx->sec.mon_lr = (uint32_t)&thread_vector_table.std_smc_entry;
	return true;	/* return into secure state */
}