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/*
* Copyright (c) 2022, Arm Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <services/el3_spmc_ffa_memory.h>
#include <platform_def.h>
/*
* On the FVP platform when using the EL3 SPMC implementation allocate the
* datastore for tracking shared memory descriptors in the TZC DRAM section
* to ensure sufficient storage can be allocated.
* Provide an implementation of the accessor method to allow the datastore
* details to be retrieved by the SPMC.
* The SPMC will take care of initializing the memory region.
*/
#define PLAT_SPMC_SHMEM_DATASTORE_SIZE 512 * 1024
__section("arm_el3_tzc_dram") static uint8_t
plat_spmc_shmem_datastore[PLAT_SPMC_SHMEM_DATASTORE_SIZE];
int plat_spmc_shmem_datastore_get(uint8_t **datastore, size_t *size)
{
*datastore = plat_spmc_shmem_datastore;
*size = PLAT_SPMC_SHMEM_DATASTORE_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;
}
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