diff options
Diffstat (limited to 'plat/arm/board/fvp/fvp_drtm_dma_prot.c')
-rw-r--r-- | plat/arm/board/fvp/fvp_drtm_dma_prot.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/plat/arm/board/fvp/fvp_drtm_dma_prot.c b/plat/arm/board/fvp/fvp_drtm_dma_prot.c new file mode 100644 index 0000000..38ff7fe --- /dev/null +++ b/plat/arm/board/fvp/fvp_drtm_dma_prot.c @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2022, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <stdbool.h> +#include <stddef.h> + +#include <drivers/arm/smmu_v3.h> +#include <lib/utils_def.h> +#include <plat/arm/common/arm_config.h> +#include <plat/common/platform.h> + +#include <platform_def.h> + +/** + * Array mentioning number of SMMUs supported by FVP + */ +static const uintptr_t fvp_smmus[] = { + PLAT_FVP_SMMUV3_BASE, +}; + +bool plat_has_non_host_platforms(void) +{ + /* FVP base platforms typically have GPU, as per FVP Reference guide */ + return true; +} + +bool plat_has_unmanaged_dma_peripherals(void) +{ + /* + * FVP Reference guide does not show devices that are described as + * DMA-capable but not managed by an SMMU in the FVP documentation. + * However, the SMMU seems to have only been introduced in the RevC + * revision. + */ + return (arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) == 0; +} + +unsigned int plat_get_total_smmus(void) +{ + if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) { + return ARRAY_SIZE(fvp_smmus); + } else { + return 0; + } +} + +void plat_enumerate_smmus(const uintptr_t **smmus_out, + size_t *smmu_count_out) +{ + if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) { + *smmus_out = fvp_smmus; + *smmu_count_out = ARRAY_SIZE(fvp_smmus); + } else { + *smmus_out = NULL; + *smmu_count_out = 0; + } +} + +/* DRTM DMA Protection Features */ +static const plat_drtm_dma_prot_features_t dma_prot_features = { + .max_num_mem_prot_regions = 0, /* No protection regions are present */ + .dma_protection_support = 0x1 /* Complete DMA protection only */ +}; + +const plat_drtm_dma_prot_features_t *plat_drtm_get_dma_prot_features(void) +{ + return &dma_prot_features; +} + +uint64_t plat_drtm_dma_prot_get_max_table_bytes(void) +{ + return 0U; +} |