1 # SPDX-License-Identifier: GPL-2.0
3 # Makefile for the linux s390-specific parts of the memory manager.
12 KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
13 KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
16 # Use minimum architecture for als.c to be able to print an error
17 # message if the kernel is started on a machine which is too old
19 ifndef CONFIG_CC_IS_CLANG
20 CC_FLAGS_MARCH_MINIMUM := -march=z900
22 CC_FLAGS_MARCH_MINIMUM := -march=z10
25 ifneq ($(CC_FLAGS_MARCH),$(CC_FLAGS_MARCH_MINIMUM))
26 AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
27 AFLAGS_head.o += $(CC_FLAGS_MARCH_MINIMUM)
28 AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH)
29 AFLAGS_mem.o += $(CC_FLAGS_MARCH_MINIMUM)
30 CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
31 CFLAGS_als.o += $(CC_FLAGS_MARCH_MINIMUM)
32 CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH)
33 CFLAGS_sclp_early_core.o += $(CC_FLAGS_MARCH_MINIMUM)
36 CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
38 obj-y := head.o als.o startup.o mem_detect.o ipl_parm.o ipl_report.o
39 obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
40 obj-y += version.o pgm_check_info.o ctype.o
41 obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE)) += uv.o
42 obj-$(CONFIG_RELOCATABLE) += machine_kexec_reloc.o
43 obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
44 targets := bzImage startup.a section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y)
47 OBJECTS := $(addprefix $(obj)/,$(obj-y))
49 quiet_cmd_section_cmp = SECTCMP $*
50 define cmd_section_cmp
51 s1=`$(OBJDUMP) -t -j "$*" "$<" | sort | \
52 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
53 s2=`$(OBJDUMP) -t -j "$*" "$(word 2,$^)" | sort | \
54 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
55 if [ "$$s1" != "$$s2" ]; then \
56 echo "error: section $* differs between $< and $(word 2,$^)" >&2; \
62 $(obj)/bzImage: $(obj)/compressed/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
63 $(call if_changed,objcopy)
65 $(obj)/section_cmp%: vmlinux $(obj)/compressed/vmlinux FORCE
66 $(call if_changed,section_cmp)
68 $(obj)/compressed/vmlinux: $(obj)/startup.a FORCE
69 $(Q)$(MAKE) $(build)=$(obj)/compressed $@
71 $(obj)/startup.a: $(OBJECTS) FORCE