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