1 /* 2 * Copyright (c) 2022, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stdbool.h> 8 #include <stddef.h> 9 10 #include <drivers/arm/smmu_v3.h> 11 #include <lib/utils_def.h> 12 #include <plat/arm/common/arm_config.h> 13 #include <plat/common/platform.h> 14 15 #include <platform_def.h> 16 17 /** 18 * Array mentioning number of SMMUs supported by FVP 19 */ 20 static const uintptr_t fvp_smmus[] = { 21 PLAT_FVP_SMMUV3_BASE, 22 }; 23 24 bool plat_has_non_host_platforms(void) 25 { 26 /* FVP base platforms typically have GPU, as per FVP Reference guide */ 27 return true; 28 } 29 30 bool plat_has_unmanaged_dma_peripherals(void) 31 { 32 /* 33 * FVP Reference guide does not show devices that are described as 34 * DMA-capable but not managed by an SMMU in the FVP documentation. 35 * However, the SMMU seems to have only been introduced in the RevC 36 * revision. 37 */ 38 return (arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) == 0; 39 } 40 41 unsigned int plat_get_total_smmus(void) 42 { 43 if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) { 44 return ARRAY_SIZE(fvp_smmus); 45 } else { 46 return 0; 47 } 48 } 49 50 void plat_enumerate_smmus(const uintptr_t **smmus_out, 51 size_t *smmu_count_out) 52 { 53 if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) { 54 *smmus_out = fvp_smmus; 55 *smmu_count_out = ARRAY_SIZE(fvp_smmus); 56 } else { 57 *smmus_out = NULL; 58 *smmu_count_out = 0; 59 } 60 } 61