forked from Mirrors/opensbi
eeab500a65
I/O Coherence Port (IOCP) provides an AXI interface for connecting external non-caching masters, such as DMA controllers. The accesses from IOCP are coherent with D-Caches and L2 Cache. IOCP is a specification option and is disabled on the Renesas RZ/Five SoC (which is based on Andes AX45MP core) due to this reason IP blocks using DMA will fail. As a workaround for SoCs with IOCP disabled CMO needs to be handled by software. Firstly OpenSBI configures the memory region as "Memory, Non-cacheable, Bufferable" and passes this region as a global shared dma pool as a DT node. With DMA_GLOBAL_POOL enabled all DMA allocations happen from this region and synchronization callbacks are implemented to synchronize when doing DMA transactions. SBI_EXT_ANDES_IOCP_SW_WORKAROUND checks if the IOCP errata should be applied to handle cache management. Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Reviewed-by: Anup Patel <anup@brainfault.org> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Reviewed-by: Yu Chien Peter Lin <peterlin@andestech.com>
58 lines
1.0 KiB
Plaintext
58 lines
1.0 KiB
Plaintext
# SPDX-License-Identifier: BSD-2-Clause
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config PLATFORM_GENERIC
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bool
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select FDT
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select FDT_DOMAIN
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select FDT_PMU
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default y
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if PLATFORM_GENERIC
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config PLATFORM_GENERIC_NAME
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string "Platform default name"
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default "Generic"
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config PLATFORM_GENERIC_MAJOR_VER
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int "Platform major version"
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range 0 65535
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default 0
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config PLATFORM_GENERIC_MINOR_VER
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int "Platform minor version"
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range 0 65535
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default 1
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config PLATFORM_ALLWINNER_D1
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bool "Allwinner D1 support"
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depends on FDT_IRQCHIP_PLIC
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default n
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config PLATFORM_ANDES_AE350
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bool "Andes AE350 support"
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select SYS_ATCSMU
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default n
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config PLATFORM_RENESAS_RZFIVE
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bool "Renesas RZ/Five support"
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select ANDES45_PMA
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select ANDES_SBI
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default n
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config PLATFORM_SIFIVE_FU540
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bool "SiFive FU540 support"
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default n
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config PLATFORM_SIFIVE_FU740
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bool "SiFive FU740 support"
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depends on FDT_RESET && FDT_I2C
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default n
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config PLATFORM_STARFIVE_JH7110
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bool "StarFive JH7110 support"
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default n
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source "$(OPENSBI_SRC_DIR)/platform/generic/andes/Kconfig"
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endif
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