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| author | Marc Bonnici <marc.bonnici@arm.com> | 2021-12-16 18:31:02 +0000 |
|---|---|---|
| committer | Marc Bonnici <marc.bonnici@arm.com> | 2022-05-19 10:57:37 +0100 |
| commit | 6a0788bc0e704283e52c80990aa2bb6e047a0cc2 (patch) | |
| tree | 41317e73225065c15c06833dd887e885cb01dbb5 | |
| parent | e0b1a6d59e57c0dbe87f5b8f8166f1123664f058 (diff) | |
| download | arm-trusted-firmware-6a0788bc0e704283e52c80990aa2bb6e047a0cc2.tar.gz | |
feat(plat/fvp): introduce accessor function to obtain datastore
In order to provide the EL3 SPMC a sufficient datastore to
record memory descriptors, a accessor function is used.
This allows for the backing memory to be allocated in a
platform defined manner, to accommodate memory constraints
and desired use cases.
Provide an implementation for the Arm FVP platform to
use a default value of 512KB memory allocated in the
TZC RAM section.
Signed-off-by: Marc Bonnici <marc.bonnici@arm.com>
Change-Id: I92bc55ba6e04bdad429eb52f0d2960ceda682804
| -rw-r--r-- | include/plat/common/platform.h | 4 | ||||
| -rw-r--r-- | plat/arm/board/fvp/fvp_el3_spmc.c | 28 | ||||
| -rw-r--r-- | plat/arm/board/fvp/platform.mk | 4 |
3 files changed, 36 insertions, 0 deletions
diff --git a/include/plat/common/platform.h b/include/plat/common/platform.h index 766450901..b62a63158 100644 --- a/include/plat/common/platform.h +++ b/include/plat/common/platform.h @@ -347,6 +347,10 @@ int plat_spm_sp_get_next_address(void **sp_base, size_t *sp_size, int plat_spm_core_manifest_load(spmc_manifest_attribute_t *manifest, const void *pm_addr); #endif +#if defined(SPMC_AT_EL3) +int plat_spmc_shmem_datastore_get(uint8_t **datastore, size_t *size); +#endif + /******************************************************************************* * Mandatory BL image load functions(may be overridden). ******************************************************************************/ diff --git a/plat/arm/board/fvp/fvp_el3_spmc.c b/plat/arm/board/fvp/fvp_el3_spmc.c new file mode 100644 index 000000000..da090c0dc --- /dev/null +++ b/plat/arm/board/fvp/fvp_el3_spmc.c @@ -0,0 +1,28 @@ +/* + * Copyright (c) 2022, Arm Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#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; +} diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk index 89ca18540..54c5e7545 100644 --- a/plat/arm/board/fvp/platform.mk +++ b/plat/arm/board/fvp/platform.mk @@ -425,3 +425,7 @@ ENABLE_SYS_REG_TRACE_FOR_NS := 1 # enable trace filter control registers access to NS by default ENABLE_TRF_FOR_NS := 1 + +ifeq (${SPMC_AT_EL3}, 1) +PLAT_BL_COMMON_SOURCES += plat/arm/board/fvp/fvp_el3_spmc.c +endif |