add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/riscv/Makefile
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..
@@ -13,10 +13,10 @@
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 ifeq ($(CONFIG_DYNAMIC_FTRACE),y)
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 	LDFLAGS_vmlinux := --no-relax
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 endif
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-KBUILD_AFLAGS_MODULE += -fPIC
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-KBUILD_CFLAGS_MODULE += -fPIC
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-KBUILD_DEFCONFIG = defconfig
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+ifeq ($(CONFIG_CMODEL_MEDLOW),y)
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+KBUILD_CFLAGS_MODULE += -mcmodel=medany
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+endif
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 export BITS
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 ifeq ($(CONFIG_ARCH_RV64I),y)
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@@ -25,10 +25,7 @@
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 	KBUILD_CFLAGS += -mabi=lp64
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 	KBUILD_AFLAGS += -mabi=lp64
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-	
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-	KBUILD_CFLAGS	+= $(call cc-ifversion, -ge, 0500, -DCONFIG_ARCH_SUPPORTS_INT128)
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-	KBUILD_MARCH = rv64im
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 	KBUILD_LDFLAGS += -melf64lriscv
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 else
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 	BITS := 32
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@@ -36,22 +33,36 @@
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 	KBUILD_CFLAGS += -mabi=ilp32
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 	KBUILD_AFLAGS += -mabi=ilp32
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-	KBUILD_MARCH = rv32im
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 	KBUILD_LDFLAGS += -melf32lriscv
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 endif
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-KBUILD_CFLAGS += -Wall
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-
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-ifeq ($(CONFIG_RISCV_ISA_A),y)
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-	KBUILD_ARCH_A = a
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+ifeq ($(CONFIG_LD_IS_LLD),y)
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+ifeq ($(shell test $(CONFIG_LLD_VERSION) -lt 150000; echo $$?),0)
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+	KBUILD_CFLAGS += -mno-relax
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+	KBUILD_AFLAGS += -mno-relax
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+ifndef CONFIG_AS_IS_LLVM
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+	KBUILD_CFLAGS += -Wa,-mno-relax
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+	KBUILD_AFLAGS += -Wa,-mno-relax
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 endif
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-ifeq ($(CONFIG_RISCV_ISA_C),y)
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-	KBUILD_ARCH_C = c
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+endif
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 endif
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-KBUILD_AFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)fd$(KBUILD_ARCH_C)
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+# ISA string setting
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+riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
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+riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima
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+riscv-march-$(CONFIG_FPU)		:= $(riscv-march-y)fd
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+riscv-march-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-y)c
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-KBUILD_CFLAGS += -march=$(KBUILD_MARCH)$(KBUILD_ARCH_A)$(KBUILD_ARCH_C)
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+ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC
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+KBUILD_CFLAGS += -Wa,-misa-spec=2.2
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+KBUILD_AFLAGS += -Wa,-misa-spec=2.2
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+else
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+riscv-march-$(CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI) := $(riscv-march-y)_zicsr_zifencei
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+endif
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+
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+KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
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+KBUILD_AFLAGS += -march=$(riscv-march-y)
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+
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 KBUILD_CFLAGS += -mno-save-restore
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 KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
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..
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@@ -61,11 +72,15 @@
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 ifeq ($(CONFIG_CMODEL_MEDANY),y)
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 	KBUILD_CFLAGS += -mcmodel=medany
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 endif
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-ifeq ($(CONFIG_MODULE_SECTIONS),y)
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-	KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/riscv/kernel/module.lds
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+ifeq ($(CONFIG_PERF_EVENTS),y)
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+        KBUILD_CFLAGS += -fno-omit-frame-pointer
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 endif
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+# Avoid generating .eh_frame sections.
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+KBUILD_CFLAGS += -fno-asynchronous-unwind-tables -fno-unwind-tables
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+
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 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-relax)
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+KBUILD_AFLAGS_MODULE += $(call as-option,-Wa$(comma)-mno-relax)
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 # GCC versions that support the "-mstrict-align" option default to allowing
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 # unaligned accesses.  While unaligned accesses are explicitly allowed in the
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@@ -76,14 +91,33 @@
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 # arch specific predefines for sparse
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 CHECKFLAGS += -D__riscv -D__riscv_xlen=$(BITS)
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+# Default target when executing plain make
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+boot		:= arch/riscv/boot
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+KBUILD_IMAGE	:= $(boot)/Image.gz
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+
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 head-y := arch/riscv/kernel/head.o
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-core-y += arch/riscv/kernel/ arch/riscv/mm/
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+core-y += arch/riscv/
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 libs-y += arch/riscv/lib/
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+libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
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 PHONY += vdso_install
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 vdso_install:
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 	$(Q)$(MAKE) $(build)=arch/riscv/kernel/vdso $@
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-all: vmlinux
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+ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_KENDRYTE),yy)
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+KBUILD_IMAGE := $(boot)/loader.bin
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+else
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+KBUILD_IMAGE := $(boot)/Image.gz
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+endif
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+BOOT_TARGETS := Image Image.gz loader loader.bin
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+
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+all:	$(notdir $(KBUILD_IMAGE))
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+
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+$(BOOT_TARGETS): vmlinux
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+	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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+	@$(kecho) '  Kernel: $(boot)/$@ is ready'
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+
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+zinstall install:
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+	$(Q)$(MAKE) $(build)=$(boot) $@