1# SPDX-License-Identifier: GPL-2.0
2# This helper makefile is used for creating
3#  - symbolic links (arch/$ARCH/include/asm/arch
4#  - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
5#  - include/config.h
6#
7# When our migration to Kconfig is done
8# (= When we move all CONFIGs from header files to Kconfig)
9# this makefile can be deleted.
10
11__all: include/autoconf.mk include/autoconf.mk.dep
12
13ifeq ($(shell grep -q '^CONFIG_SPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
14__all: spl/include/autoconf.mk
15endif
16
17ifeq ($(shell grep -q '^CONFIG_TPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
18__all: tpl/include/autoconf.mk
19endif
20
21ifeq ($(shell grep -q '^CONFIG_VPL=y' include/config/auto.conf 2>/dev/null && echo y),y)
22__all: vpl/include/autoconf.mk
23endif
24
25include include/config/auto.conf
26
27include scripts/Kbuild.include
28
29# Need to define CC and CPP again here in case the top Makefile did not
30# include config.mk.  Some architectures expect CROSS_COMPILE to be defined
31# in arch/$(ARCH)/config.mk
32CC		= $(CROSS_COMPILE)gcc
33CPP		= $(CC) -E
34
35include config.mk
36
37UBOOTINCLUDE    := \
38		-Iinclude \
39		$(if $(KBUILD_SRC), -I$(srctree)/include) \
40		-I$(srctree)/arch/$(ARCH)/include \
41		-include $(srctree)/include/linux/kconfig.h
42
43c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
44					$(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
45
46quiet_cmd_autoconf_dep = GEN     $@
47      cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
48	-MQ include/config/auto.conf $(srctree)/include/common.h > $@ || {	\
49		rm $@; false;							\
50	}
51include/autoconf.mk.dep: include/config.h FORCE
52	$(call cmd,autoconf_dep)
53
54# We are migrating from board headers to Kconfig little by little.
55# In the interim, we use both of
56#  - include/config/auto.conf (generated by Kconfig)
57#  - include/autoconf.mk      (used in the U-Boot conventional configuration)
58# The following rule creates autoconf.mk
59# include/config/auto.conf is grepped in order to avoid duplication of the
60# same CONFIG macros
61quiet_cmd_autoconf = GEN     $@
62      cmd_autoconf = \
63		sed -n -f $(srctree)/tools/scripts/define2mk.sed $< |			\
64		while read line; do							\
65			if [ -n "${KCONFIG_IGNORE_DUPLICATES}" ] ||			\
66			   ! grep -q "$${line%=*}=" include/config/auto.conf; then	\
67				echo "$$line";						\
68			fi;								\
69		done > $@
70
71quiet_cmd_u_boot_cfg = CFG     $@
72      cmd_u_boot_cfg = \
73	$(CPP) $(c_flags) $2 -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && { \
74		grep 'define CONFIG_' $@.tmp | \
75			sed '/define CONFIG_IS_ENABLED(/d;/define CONFIG_IF_ENABLED_INT(/d;/define CONFIG_VAL(/d;' > $@; \
76		rm $@.tmp;						\
77	} || {								\
78		rm $@.tmp; false;					\
79	}
80
81u-boot.cfg: include/config.h FORCE
82	$(call cmd,u_boot_cfg)
83
84spl/u-boot.cfg: include/config.h FORCE
85	$(Q)mkdir -p $(dir $@)
86	$(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD)
87
88tpl/u-boot.cfg: include/config.h FORCE
89	$(Q)mkdir -p $(dir $@)
90	$(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD -DCONFIG_TPL_BUILD)
91
92vpl/u-boot.cfg: include/config.h FORCE
93	$(Q)mkdir -p $(dir $@)
94	$(call cmd,u_boot_cfg,-DCONFIG_SPL_BUILD -DCONFIG_VPL_BUILD)
95
96include/autoconf.mk: u-boot.cfg
97	$(call cmd,autoconf)
98
99spl/include/autoconf.mk: spl/u-boot.cfg
100	$(Q)mkdir -p $(dir $@)
101	$(call cmd,autoconf)
102
103tpl/include/autoconf.mk: tpl/u-boot.cfg
104	$(Q)mkdir -p $(dir $@)
105	$(call cmd,autoconf)
106
107vpl/include/autoconf.mk: vpl/u-boot.cfg
108	$(Q)mkdir -p $(dir $@)
109	$(call cmd,autoconf)
110
111# include/config.h
112# Prior to Kconfig, it was generated by mkconfig. Now it is created here.
113define filechk_config_h
114	(echo "/* Automatically generated - do not edit */";		\
115	echo \#define CFG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
116	echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>;		\
117	echo \#include \<asm/config.h\>;				\
118	echo \#include \<linux/kconfig.h\>;				\
119	echo \#include \<config_fallbacks.h\>;)
120endef
121
122include/config.h: scripts/Makefile.autoconf create_symlink FORCE
123	$(call filechk,config_h)
124
125# symbolic links
126# If arch/$(ARCH)/mach-$(SOC)/include/mach exists,
127# make a symbolic link to that directory.
128# Otherwise, create a symbolic link to arch/$(ARCH)/include/asm/arch-$(SOC).
129PHONY += create_symlink
130create_symlink:
131ifdef CONFIG_CREATE_ARCH_SYMLINK
132ifneq ($(KBUILD_SRC),)
133	$(Q)mkdir -p include/asm
134	$(Q)if [ -d $(KBUILD_SRC)/arch/$(ARCH)/mach-$(SOC)/include/mach ]; then	\
135		dest=arch/$(ARCH)/mach-$(SOC)/include/mach;			\
136	else									\
137		dest=arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU));	\
138	fi;									\
139	ln -fsn $(KBUILD_SRC)/$$dest include/asm/arch
140else
141	$(Q)if [ -d arch/$(ARCH)/mach-$(SOC)/include/mach ]; then	\
142		dest=../../mach-$(SOC)/include/mach;			\
143	else								\
144		dest=arch-$(if $(SOC),$(SOC),$(CPU));			\
145	fi;								\
146	ln -fsn $$dest arch/$(ARCH)/include/asm/arch
147endif
148endif
149
150PHONY += FORCE
151FORCE:
152
153.PHONY: $(PHONY)
154