Improve hifive-premier-p550_defconfig distro compatibility

arch/riscv/Kconfig

@@ -14,7 +14,7 @@ config RISCV
 	def_bool y
 	select ACPI_GENERIC_GSI if ACPI
 	select ACPI_REDUCED_HARDWARE_ONLY if ACPI
-	select ARCH_DMA_DEFAULT_COHERENT
+	select ARCH_DMA_DEFAULT_COHERENT if !SOC_SIFIVE_EIC7700
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
 	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
 	select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
@@ -36,9 +36,11 @@ config RISCV
 	select ARCH_HAS_STRICT_KERNEL_RWX if MMU && !XIP_KERNEL
 	select ARCH_HAS_STRICT_MODULE_RWX if MMU && !XIP_KERNEL
 	select ARCH_HAS_SYSCALL_WRAPPER
+	select ARCH_HAS_TEARDOWN_DMA_OPS if IOMMU_SUPPORT && SOC_SIFIVE_EIC7700
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
 	select ARCH_HAS_UBSAN_SANITIZE_ALL
 	select ARCH_HAS_VDSO_DATA
+	select ARCH_KEEP_MEMBLOCK
 	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT
 	select ARCH_STACKWALK
@@ -64,6 +66,7 @@ config RISCV
 	select CLONE_BACKWARDS
 	select COMMON_CLK
 	select CPU_PM if CPU_IDLE || HIBERNATION
+	select DMA_DIRECT_REMAP if SOC_SIFIVE_EIC7700
 	select EDAC_SUPPORT
 	select FRAME_POINTER if PERF_EVENTS || (FUNCTION_TRACER && !DYNAMIC_FTRACE)
 	select GENERIC_ARCH_TOPOLOGY
@@ -141,6 +144,7 @@ config RISCV
 	select HAVE_STACKPROTECTOR
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
+	select IOMMU_DMA if IOMMU_SUPPORT && SOC_SIFIVE_EIC7700
 	select IRQ_DOMAIN
 	select IRQ_FORCED_THREADING
 	select KASAN_VMALLOC if KASAN
@@ -268,12 +272,77 @@ config LOCKDEP_SUPPORT
 
 config RISCV_DMA_NONCOHERENT
 	bool
+	select ARCH_HAS_DMA_CLEAR_UNCACHED if SOC_SIFIVE_EIC7700
 	select ARCH_HAS_DMA_PREP_COHERENT
+	select ARCH_HAS_DMA_SET_UNCACHED if SOC_SIFIVE_EIC7700
 	select ARCH_HAS_SETUP_DMA_OPS
 	select ARCH_HAS_SYNC_DMA_FOR_CPU
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select DMA_BOUNCE_UNALIGNED_KMALLOC if SWIOTLB
 
+config RISCV_DIE0_CACHED_OFFSET
+	hex "DIE0 memory port addr of U84"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0x80000000
+	help
+	  Access to DDR memory through U84 memory port is cached.
+
+config RISCV_DIE0_MEM_MAX_SIZE
+	hex "DIE0 memory size, default 32GB"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0x800000000
+
+config RISCV_DIE0_UNCACHED_OFFSET
+	hex "DIE0 system port addr of U84"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0xc000000000
+	help
+	  Access to DDR memory through U84 system port is uncached.
+	  Add this offset when allocating  memory from memory port(0x80000000~),
+	  then memremap to virtual address.
+
+config RISCV_DIE1_CACHED_OFFSET
+	hex "DIE1 memory port addr of U84"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0x2000000000
+	help
+	  Access to DIE1 DDR memory through U84 memory port is cached.
+
+config RISCV_DIE1_MEM_MAX_SIZE
+	hex "DIE1 memory size, default 32GB"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0x800000000
+
+config RISCV_DIE1_UNCACHED_OFFSET
+	hex "DIE1 system port addr of U84"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0xe000000000
+	help
+	  Access to DIE1 DDR memory through U84 system port is uncached.
+	  Add this offset when allocating  memory from memory port(0x2000000000~),
+	  then memremap to virtual address.
+
+config RISCV_INTERLEAVE_CACHED_OFFSET
+	hex "memory port addr of interleave"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0x4000000000
+	help
+	  Access to DDR memory through U84 memory port with interleave is cached.
+
+config RISCV_INTERLEAVE_MEM_MAX_SIZE
+	hex "Interleaving memory size, default 64GB"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0x1000000000
+
+config RISCV_INTERLEAVE_UNCACHED_OFFSET
+	hex "system port addr of interleave"
+	depends on RISCV && ARCH_HAS_DMA_SET_UNCACHED
+	default 0x10000000000
+	help
+	  Access to DDR memory through U84 system port with interleave is uncached.
+	  Add this offset when allocating  memory from memory port(0x4000000000~),
+	  then memremap to virtual address.
+
 config RISCV_NONSTANDARD_CACHE_OPS
 	bool
 	help
@@ -328,7 +397,7 @@ config ARCH_RV64I
 	bool "RV64I"
 	select 64BIT
 	select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
-	select SWIOTLB if MMU
+	select SWIOTLB if MMU && !SOC_SIFIVE_EIC7700
 
 endchoice
 

arch/riscv/Kconfig.socs

@@ -16,9 +16,16 @@ config ARCH_RENESAS
 config ARCH_SIFIVE
 	def_bool SOC_SIFIVE
 
+config SOC_SIFIVE_EIC7700
+	bool "SiFive eic7700 SoC"
+	select RISCV_NONSTANDARD_CACHE_OPS
+	help
+	  This enables support for SiFive EIC7700 platform hardware.
+
 config SOC_SIFIVE
 	bool "SiFive SoCs"
 	select ERRATA_SIFIVE if !XIP_KERNEL
+	select RISCV_DMA_NONCOHERENT if SOC_SIFIVE_EIC7700
 	help
 	  This enables support for SiFive SoC platform hardware.
 

arch/riscv/boot/dts/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 subdir-y += allwinner
 subdir-y += canaan
+subdir-y += eswin
 subdir-y += microchip
 subdir-y += renesas
 subdir-y += sifive

arch/riscv/boot/dts/eswin/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_SOC_SIFIVE) += hifive-premier-p550.dtb
+obj-$(CONFIG_BUILTIN_DTB) += $(addsuffix .o, $(dtb-y))