Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 158 insertions, 0 deletions

diff --git a/arch/loongarch/Makefile b/arch/loongarch/Makefile
new file mode 100644
index 0000000000..d423fba7c4
--- /dev/null
+++ b/arch/loongarch/Makefile
@@ -0,0 +1,158 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Author: Huacai Chen <chenhuacai@loongson.cn>
+# Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+
+boot	:= arch/loongarch/boot
+
+KBUILD_DEFCONFIG := loongson3_defconfig
+
+image-name-y			:= vmlinux
+image-name-$(CONFIG_EFI_ZBOOT)	:= vmlinuz
+
+ifndef CONFIG_EFI_STUB
+KBUILD_IMAGE	:= $(boot)/vmlinux.elf
+else
+KBUILD_IMAGE	:= $(boot)/$(image-name-y).efi
+endif
+
+#
+# Select the object file format to substitute into the linker script.
+#
+64bit-tool-archpref	= loongarch64
+32bit-bfd		= elf32-loongarch
+64bit-bfd		= elf64-loongarch
+32bit-emul		= elf32loongarch
+64bit-emul		= elf64loongarch
+
+ifdef CONFIG_DYNAMIC_FTRACE
+KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
+CC_FLAGS_FTRACE := -fpatchable-function-entry=2
+endif
+
+ifdef CONFIG_64BIT
+tool-archpref		= $(64bit-tool-archpref)
+UTS_MACHINE		:= loongarch64
+endif
+
+ifneq ($(SUBARCH),$(ARCH))
+  ifeq ($(CROSS_COMPILE),)
+    CROSS_COMPILE := $(call cc-cross-prefix, $(tool-archpref)-linux-  $(tool-archpref)-linux-gnu-  $(tool-archpref)-unknown-linux-gnu-)
+  endif
+endif
+
+ifdef CONFIG_64BIT
+ld-emul			= $(64bit-emul)
+cflags-y		+= -mabi=lp64s
+endif
+
+cflags-y			+= -pipe -msoft-float
+LDFLAGS_vmlinux			+= -static -n -nostdlib
+
+# When the assembler supports explicit relocation hint, we must use it.
+# GCC may have -mexplicit-relocs off by default if it was built with an old
+# assembler, so we force it via an option.
+#
+# When the assembler does not supports explicit relocation hint, we can't use
+# it.  Disable it if the compiler supports it.
+#
+# The combination of a "new" assembler and "old" GCC is not supported, given
+# the rarity of this combo and the extra complexity needed to make it work.
+# Either upgrade the compiler or downgrade the assembler; the build will error
+# out if it is the case (by probing for the model attribute; all supported
+# compilers in this case would have support).
+#
+# Also, -mdirect-extern-access is useful in case of building with explicit
+# relocs, for avoiding unnecessary GOT accesses. It is harmless to not have
+# support though.
+ifdef CONFIG_AS_HAS_EXPLICIT_RELOCS
+cflags-y			+= $(call cc-option,-mexplicit-relocs)
+KBUILD_CFLAGS_KERNEL		+= $(call cc-option,-mdirect-extern-access)
+KBUILD_AFLAGS_MODULE		+= $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
+KBUILD_CFLAGS_MODULE		+= $(call cc-option,-mno-relax) $(call cc-option,-Wa$(comma)-mno-relax)
+else
+cflags-y			+= $(call cc-option,-mno-explicit-relocs)
+KBUILD_AFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel
+KBUILD_CFLAGS_KERNEL		+= -Wa,-mla-global-with-pcrel
+KBUILD_AFLAGS_MODULE		+= -Wa,-mla-global-with-abs
+KBUILD_CFLAGS_MODULE		+= -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
+endif
+
+ifeq ($(CONFIG_RELOCATABLE),y)
+KBUILD_CFLAGS_KERNEL		+= -fPIE
+LDFLAGS_vmlinux			+= -static -pie --no-dynamic-linker -z notext $(call ld-option, --apply-dynamic-relocs)
+endif
+
+cflags-y += $(call cc-option, -mno-check-zero-division)
+
+ifndef CONFIG_KASAN
+cflags-y += -fno-builtin-memcpy -fno-builtin-memmove -fno-builtin-memset
+endif
+
+load-y		= 0x9000000000200000
+bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y)
+
+drivers-$(CONFIG_PCI)		+= arch/loongarch/pci/
+
+KBUILD_AFLAGS	+= $(cflags-y)
+KBUILD_CFLAGS	+= $(cflags-y)
+KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)
+
+# This is required to get dwarf unwinding tables into .debug_frame
+# instead of .eh_frame so we don't discard them.
+KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
+
+ifdef CONFIG_ARCH_STRICT_ALIGN
+# Don't emit unaligned accesses.
+# Not all LoongArch cores support unaligned access, and as kernel we can't
+# rely on others to provide emulation for these accesses.
+KBUILD_CFLAGS += $(call cc-option,-mstrict-align)
+else
+# Optimise for performance on hardware supports unaligned access.
+KBUILD_CFLAGS += $(call cc-option,-mno-strict-align)
+endif
+
+KBUILD_CFLAGS += -isystem $(shell $(CC) -print-file-name=include)
+
+KBUILD_LDFLAGS	+= -m $(ld-emul)
+
+ifdef need-compiler
+CHECKFLAGS += $(shell $(CC) $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -dM -E -x c /dev/null | \
+	grep -E -vw '__GNUC_(MINOR_|PATCHLEVEL_)?_' | \
+	sed -e "s/^\#define /-D'/" -e "s/ /'='/" -e "s/$$/'/" -e 's/\$$/&&/g')
+endif
+
+libs-y += arch/loongarch/lib/
+libs-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
+
+drivers-y		+= arch/loongarch/crypto/
+
+# suspend and hibernation support
+drivers-$(CONFIG_PM)	+= arch/loongarch/power/
+
+ifeq ($(KBUILD_EXTMOD),)
+prepare: vdso_prepare
+vdso_prepare: prepare0
+	$(Q)$(MAKE) $(build)=arch/loongarch/vdso include/generated/vdso-offsets.h
+endif
+
+PHONY += vdso_install
+vdso_install:
+	$(Q)$(MAKE) $(build)=arch/loongarch/vdso $@
+
+all:	$(notdir $(KBUILD_IMAGE))
+
+vmlinuz.efi: vmlinux.efi
+
+vmlinux.elf vmlinux.efi vmlinuz.efi: vmlinux
+	$(Q)$(MAKE) $(build)=$(boot) $(bootvars-y) $(boot)/$@
+
+install:
+	$(Q)install -D -m 755 $(KBUILD_IMAGE) $(INSTALL_PATH)/$(image-name-y)-$(KERNELRELEASE)
+	$(Q)install -D -m 644 .config $(INSTALL_PATH)/config-$(KERNELRELEASE)
+	$(Q)install -D -m 644 System.map $(INSTALL_PATH)/System.map-$(KERNELRELEASE)
+
+define archhelp
+	echo '  install              - install kernel into $(INSTALL_PATH)'
+	echo
+endef