1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for the linux s390-specific parts of the memory manager. 4# 5 6KCOV_INSTRUMENT := n 7GCOV_PROFILE := n 8UBSAN_SANITIZE := n 9KASAN_SANITIZE := n 10 11KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR) 12KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR) 13 14# 15# Use -march=z900 for als.c to be able to print an error 16# message if the kernel is started on a machine which is too old 17# 18ifneq ($(CC_FLAGS_MARCH),-march=z900) 19AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH) 20AFLAGS_head.o += -march=z900 21AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH) 22AFLAGS_mem.o += -march=z900 23CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH) 24CFLAGS_als.o += -march=z900 25CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH) 26CFLAGS_sclp_early_core.o += -march=z900 27endif 28 29CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char 30 31obj-y := head.o als.o startup.o mem_detect.o ipl_parm.o string.o ebcdic.o 32obj-y += sclp_early_core.o mem.o ipl_vmparm.o cmdline.o ctype.o 33targets := bzImage startup.a section_cmp.boot.data $(obj-y) 34subdir- := compressed 35 36OBJECTS := $(addprefix $(obj)/,$(obj-y)) 37 38quiet_cmd_section_cmp = SECTCMP $* 39define cmd_section_cmp 40 s1=`$(OBJDUMP) -t -j "$*" "$<" | sort | \ 41 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \ 42 s2=`$(OBJDUMP) -t -j "$*" "$(word 2,$^)" | sort | \ 43 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \ 44 if [ "$$s1" != "$$s2" ]; then \ 45 echo "error: section $* differs between $< and $(word 2,$^)" >&2; \ 46 exit 1; \ 47 fi; \ 48 touch $@ 49endef 50 51$(obj)/bzImage: $(obj)/compressed/vmlinux $(obj)/section_cmp.boot.data FORCE 52 $(call if_changed,objcopy) 53 54$(obj)/section_cmp%: vmlinux $(obj)/compressed/vmlinux FORCE 55 $(call if_changed,section_cmp) 56 57$(obj)/compressed/vmlinux: $(obj)/startup.a FORCE 58 $(Q)$(MAKE) $(build)=$(obj)/compressed $@ 59 60quiet_cmd_ar = AR $@ 61 cmd_ar = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(real-prereqs) 62 63$(obj)/startup.a: $(OBJECTS) FORCE 64 $(call if_changed,ar) 65 66install: $(CONFIGURE) $(obj)/bzImage 67 sh -x $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \ 68 System.map "$(INSTALL_PATH)" 69 70chkbss := $(obj-y) 71chkbss-target := startup.a 72include $(srctree)/arch/s390/scripts/Makefile.chkbss 73