Hook up Kconfig Ada spec file

We generate a $(obj)/cb-config.ads once and copy it per stage that uses
it to $(obj)/<stage>/cb-config.ads (to simplify the gnat-bind step). The
Ada package is called `CB.Config`. As there was no `CB` package yet, add
that too.

Change-Id: I963a6517ef4bcf84f2c8e9ae8d24a0d6b971d2b0
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/30584
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

Makefile

@@ -188,6 +188,9 @@ $(KCONFIG_AUTOCONFIG): $(KCONFIG_AUTOHEADER)
 $(KCONFIG_AUTOADS): $(KCONFIG_AUTOCONFIG) $(objutil)/kconfig/toada
 	$(objutil)/kconfig/toada CB.Config <$< >$@
 
+$(obj)/%/$(notdir $(KCONFIG_AUTOADS)): $(KCONFIG_AUTOADS)
+	cp $< $@
+
 # Add a new class of source/object files to the build system
 add-class= \
 	$(eval $(1)-srcs:=) \
@@ -272,6 +275,11 @@ $(eval $(postinclude-hooks))
 # Eliminate duplicate mentions of source files in a class
 $(foreach class,$(classes),$(eval $(class)-srcs:=$(sort $($(class)-srcs))))
 
+# Build Kconfig .ads if necessary
+ifeq ($(CONFIG_RAMSTAGE_ADA),y)
+ramstage-srcs += $(obj)/ramstage/$(notdir $(KCONFIG_AUTOADS))
+endif
+
 # To track dependencies, we need all Ada specification (.ads) files in
 # *-srcs. Extract / filter all specification files that have a matching
 # body (.adb) file here (specifications without a body are valid sources
@@ -320,7 +328,7 @@ define create_cc_template
 ifn$(EMPTY)def $(1)-objs_$(2)_template
 de$(EMPTY)fine $(1)-objs_$(2)_template
 ifn$(EMPTY)eq ($(filter ads adb,$(2)),)
-$$(call src-to-obj,$1,$$(1).$2): $$(1).$2 $$(call create_ada_deps,$1,$$(call src-to-ali,$1,$$(1).$2)) $(KCONFIG_AUTOHEADER) $(4)
+$$(call src-to-obj,$1,$$(1).$2): $$(1).$2 $$(call create_ada_deps,$1,$$(call src-to-ali,$1,$$(1).$2)) $(4)
 	@printf "    GCC        $$$$(subst $$$$(obj)/,,$$$$(@))\n"
 	$(GCC_$(1)) \
 		$$$$(ADAFLAGS_$(1)) $$$$(addprefix -I,$$$$($(1)-ada-dirs)) \

Makefile.inc

@@ -215,7 +215,9 @@ verstage-c-deps:=$$(OPTION_TABLE_H)
 bootblock-c-deps:=$$(OPTION_TABLE_H)
 $(foreach type,ads adb, \
   $(foreach stage,$(COREBOOT_STANDARD_STAGES), \
-    $(eval $(stage)-$(type)-deps := $(obj)/libgnat-$(ARCH-$(stage)-y)/libgnat.a)))
+    $(eval $(stage)-$(type)-deps := \
+	$(obj)/$(stage)/$(notdir $(KCONFIG_AUTOADS)) \
+	$(obj)/libgnat-$(ARCH-$(stage)-y)/libgnat.a)))
 
 # Add handler to copy linker scripts
 define generic-objs_ld_template_gen

src/lib/Makefile.inc

@@ -296,6 +296,8 @@ $(objcbfs)/%.debug.rmod: $(objcbfs)/%.debug | $(RMODTOOL)
 $(obj)/%.elf.rmod: $(obj)/%.elf | $(RMODTOOL)
 	$(RMODTOOL) -i $< -o $@
 
+ramstage-$(CONFIG_RAMSTAGE_ADA) += cb.ads
+
 ifeq ($(CONFIG_RAMSTAGE_LIBHWBASE),y)
 
 to-ada-hex = $(eval $(1) := 16\\\#$(patsubst 0x%,%,$($(1)))\\\#)

src/lib/cb.ads

@@ -0,0 +1,2 @@
+package CB is
+end CB;