1 /* 2 * Copyright (c) 2022-2025, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <lib/xlat_tables/xlat_tables_defs.h> 8 #include <plat/arm/common/plat_arm.h> 9 #include <services/el3_spmc_ffa_memory.h> 10 11 #include <platform_def.h> 12 13 __section(".arm_el3_tzc_dram") __unused static uint8_t plat_spmc_shmem_datastore[PAGE_SIZE]; 14 15 int plat_spmc_shmem_datastore_get(uint8_t **datastore, size_t *size) 16 { 17 *datastore = (uint8_t *)plat_spmc_shmem_datastore; 18 *size = PAGE_SIZE; 19 return 0; 20 } 21 22 /* 23 * Add dummy implementations of memory management related platform hooks. 24 * These can be used to implement platform specific functionality to support 25 * a memory sharing/lending operation. 26 * 27 * Note: The hooks must be located as part of the initial share request and 28 * final reclaim to prevent order dependencies with operations that may take 29 * place in the normal world without visibility of the SPMC. 30 */ 31 int plat_spmc_shmem_begin(struct ffa_mtd *desc) 32 { 33 return 0; 34 } 35 int plat_spmc_shmem_reclaim(struct ffa_mtd *desc) 36 { 37 return 0; 38 } 39 40 int plat_spmd_handle_group0_interrupt(uint32_t intid) 41 { 42 /* 43 * As of now, there are no sources of Group0 secure interrupt enabled 44 * for Juno. 45 */ 46 (void)intid; 47 return -1; 48 } 49 50