Files
opensbi/platform/generic/Kconfig
Lad Prabhakar eeab500a65 platform: generic: andes/renesas: Add SBI EXT to check for enabling IOCP errata
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>
2023-04-14 17:35:04 +05:30

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# SPDX-License-Identifier: BSD-2-Clause
config PLATFORM_GENERIC
bool
select FDT
select FDT_DOMAIN
select FDT_PMU
default y
if PLATFORM_GENERIC
config PLATFORM_GENERIC_NAME
string "Platform default name"
default "Generic"
config PLATFORM_GENERIC_MAJOR_VER
int "Platform major version"
range 0 65535
default 0
config PLATFORM_GENERIC_MINOR_VER
int "Platform minor version"
range 0 65535
default 1
config PLATFORM_ALLWINNER_D1
bool "Allwinner D1 support"
depends on FDT_IRQCHIP_PLIC
default n
config PLATFORM_ANDES_AE350
bool "Andes AE350 support"
select SYS_ATCSMU
default n
config PLATFORM_RENESAS_RZFIVE
bool "Renesas RZ/Five support"
select ANDES45_PMA
select ANDES_SBI
default n
config PLATFORM_SIFIVE_FU540
bool "SiFive FU540 support"
default n
config PLATFORM_SIFIVE_FU740
bool "SiFive FU740 support"
depends on FDT_RESET && FDT_I2C
default n
config PLATFORM_STARFIVE_JH7110
bool "StarFive JH7110 support"
default n
source "$(OPENSBI_SRC_DIR)/platform/generic/andes/Kconfig"
endif