arch/xtensa/boot/Makefile

Source file repositories/reference/linux-study-clean/arch/xtensa/boot/Makefile

File Facts

System
Linux kernel
Corpus path
arch/xtensa/boot/Makefile
Extension
[no extension]
Size
1352 bytes
Lines
54
Domain
Architecture Layer
Bucket
arch/xtensa
Inferred role
Architecture Layer: build/configuration rule
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#
# arch/xtensa/boot/Makefile
#
# This file is subject to the terms and conditions of the GNU General Public
# License.  See the file "COPYING" in the main directory of this archive
# for more details.
#
#


# KBUILD_CFLAGS used when building rest of boot (takes effect recursively)
KBUILD_CFLAGS	+= -fno-builtin

subdir-y	:= lib
targets		+= vmlinux.bin vmlinux.bin.gz
targets		+= uImage xipImage

# Subdirs for the boot loader(s)

boot-$(CONFIG_XTENSA_PLATFORM_ISS)    += Image
boot-$(CONFIG_XTENSA_PLATFORM_XT2000) += Image zImage uImage
boot-$(CONFIG_XTENSA_PLATFORM_XTFPGA) += Image zImage uImage

all: $(boot-y)
Image: boot-elf
zImage: boot-redboot
uImage: $(obj)/uImage
xipImage: $(obj)/xipImage

boot-elf boot-redboot: $(addprefix $(obj)/,$(subdir-y))
	$(Q)$(MAKE) $(build)=$(obj)/$@ $(MAKECMDGOALS)

OBJCOPYFLAGS = --strip-all -R .comment -R .notes -O binary

$(obj)/vmlinux.bin: vmlinux FORCE
	$(call if_changed,objcopy)

$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
	$(call if_changed,gzip)

boot-elf: $(obj)/vmlinux.bin
boot-redboot: $(obj)/vmlinux.bin.gz

UIMAGE_LOADADDR = $(CONFIG_KERNEL_LOAD_ADDRESS)
UIMAGE_COMPRESSION = gzip

$(obj)/uImage: $(obj)/vmlinux.bin.gz FORCE
	$(call if_changed,uimage)
	$(Q)$(kecho) '  Kernel: $@ is ready'

$(obj)/xipImage: vmlinux FORCE
	$(call if_changed,objcopy)
	$(Q)$(kecho) '  Kernel: $@ is ready'

Annotation

Implementation Notes