xref: /rk3399_ARM-atf/plat/arm/board/juno/juno_el3_spmc.c (revision fad88444e30621ec711dedf9ff5b4a3675b2b3a9)

/*
 * Copyright (c) 2022-2025, Arm Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <lib/xlat_tables/xlat_tables_defs.h>
#include <plat/arm/common/plat_arm.h>
#include <services/el3_spmc_ffa_memory.h>

#include <platform_def.h>

__section(".arm_el3_tzc_dram") __unused static uint8_t plat_spmc_shmem_datastore[PAGE_SIZE];

int plat_spmc_shmem_datastore_get(uint8_t **datastore, size_t *size)
{
	*datastore = (uint8_t *)plat_spmc_shmem_datastore;
	*size = PAGE_SIZE;
	return 0;
}

/*
 * Add dummy implementations of memory management related platform hooks.
 * These can be used to implement platform specific functionality to support
 * a memory sharing/lending operation.
 *
 * Note: The hooks must be located as part of the initial share request and
 * final reclaim to prevent order dependencies with operations that may take
 * place in the normal world without visibility of the SPMC.
 */
int plat_spmc_shmem_begin(struct ffa_mtd *desc)
{
	return 0;
}
int plat_spmc_shmem_reclaim(struct ffa_mtd *desc)
{
	return 0;
}

int plat_spmd_handle_group0_interrupt(uint32_t intid)
{
	/*
	 * As of now, there are no sources of Group0 secure interrupt enabled
	 * for Juno.
	 */
	(void)intid;
	return -1;
}