sh: Get multiple boards in one image working again.

This tidies up the build rules and permits multiple boards to be
linked in to the same kernel. The earlier Kconfig work ensures that
the CPU configuration is consistent across the boards, as this is
the only thing that we can't do dynamically.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Makefile

@@ -87,39 +87,39 @@ core-y				+= arch/sh/kernel/ arch/sh/mm/
 core-$(CONFIG_SH_FPU_EMU)	+= arch/sh/math-emu/
 
 # Boards
-machdir-$(CONFIG_SH_SOLUTION_ENGINE)		:= se/770x
-machdir-$(CONFIG_SH_7722_SOLUTION_ENGINE)	:= se/7722
-machdir-$(CONFIG_SH_7751_SOLUTION_ENGINE)	:= se/7751
-machdir-$(CONFIG_SH_7780_SOLUTION_ENGINE)	:= se/7780
-machdir-$(CONFIG_SH_7300_SOLUTION_ENGINE)	:= se/7300
-machdir-$(CONFIG_SH_7343_SOLUTION_ENGINE)	:= se/7343
-machdir-$(CONFIG_SH_73180_SOLUTION_ENGINE)	:= se/73180
-machdir-$(CONFIG_SH_HP6XX)			:= hp6xx
-machdir-$(CONFIG_SH_SATURN)			:= saturn
-machdir-$(CONFIG_SH_DREAMCAST)			:= dreamcast
-machdir-$(CONFIG_SH_MPC1211)			:= mpc1211
-machdir-$(CONFIG_SH_SH03)			:= sh03
-machdir-$(CONFIG_SH_SECUREEDGE5410)		:= snapgear
-machdir-$(CONFIG_SH_HS7751RVOIP)		:= renesas/hs7751rvoip
-machdir-$(CONFIG_SH_RTS7751R2D)			:= renesas/rts7751r2d
-machdir-$(CONFIG_SH_7751_SYSTEMH)		:= renesas/systemh
-machdir-$(CONFIG_SH_EDOSK7705)			:= renesas/edosk7705
-machdir-$(CONFIG_SH_HIGHLANDER)			:= renesas/r7780rp
-machdir-$(CONFIG_SH_7710VOIPGW)			:= renesas/sh7710voipgw
-machdir-$(CONFIG_SH_SH4202_MICRODEV)		:= superh/microdev
-machdir-$(CONFIG_SH_LANDISK)			:= landisk
-machdir-$(CONFIG_SH_TITAN)			:= titan
-machdir-$(CONFIG_SH_SHMIN)			:= shmin
-machdir-$(CONFIG_SH_7206_SOLUTION_ENGINE)	:= se/7206
-machdir-$(CONFIG_SH_7619_SOLUTION_ENGINE)	:= se/7619
-machdir-$(CONFIG_SH_LBOX_RE2)			:= lboxre2
-machdir-$(CONFIG_SH_UNKNOWN)			:= unknown
-
-incdir-y			:= $(notdir $(machdir-y))
-incdir-$(CONFIG_SH_HP6XX)			:= hp6xx
+machdir-$(CONFIG_SH_SOLUTION_ENGINE)		+= se/770x
+machdir-$(CONFIG_SH_7722_SOLUTION_ENGINE)	+= se/7722
+machdir-$(CONFIG_SH_7751_SOLUTION_ENGINE)	+= se/7751
+machdir-$(CONFIG_SH_7780_SOLUTION_ENGINE)	+= se/7780
+machdir-$(CONFIG_SH_7300_SOLUTION_ENGINE)	+= se/7300
+machdir-$(CONFIG_SH_7343_SOLUTION_ENGINE)	+= se/7343
+machdir-$(CONFIG_SH_73180_SOLUTION_ENGINE)	+= se/73180
+machdir-$(CONFIG_SH_HP6XX)			+= hp6xx
+machdir-$(CONFIG_SH_SATURN)			+= saturn
+machdir-$(CONFIG_SH_DREAMCAST)			+= dreamcast
+machdir-$(CONFIG_SH_MPC1211)			+= mpc1211
+machdir-$(CONFIG_SH_SH03)			+= sh03
+machdir-$(CONFIG_SH_SECUREEDGE5410)		+= snapgear
+machdir-$(CONFIG_SH_HS7751RVOIP)		+= renesas/hs7751rvoip
+machdir-$(CONFIG_SH_RTS7751R2D)			+= renesas/rts7751r2d
+machdir-$(CONFIG_SH_7751_SYSTEMH)		+= renesas/systemh
+machdir-$(CONFIG_SH_EDOSK7705)			+= renesas/edosk7705
+machdir-$(CONFIG_SH_HIGHLANDER)			+= renesas/r7780rp
+machdir-$(CONFIG_SH_7710VOIPGW)			+= renesas/sh7710voipgw
+machdir-$(CONFIG_SH_SH4202_MICRODEV)		+= superh/microdev
+machdir-$(CONFIG_SH_LANDISK)			+= landisk
+machdir-$(CONFIG_SH_TITAN)			+= titan
+machdir-$(CONFIG_SH_SHMIN)			+= shmin
+machdir-$(CONFIG_SH_7206_SOLUTION_ENGINE)	+= se/7206
+machdir-$(CONFIG_SH_7619_SOLUTION_ENGINE)	+= se/7619
+machdir-$(CONFIG_SH_LBOX_RE2)			+= lboxre2
+machdir-$(CONFIG_SH_UNKNOWN)			+= unknown
+
+incdir-y	:= $(notdir $(machdir-y))
 
 ifneq ($(machdir-y),)
-core-y				+= arch/sh/boards/$(machdir-y)/
+core-y	+= $(addprefix arch/sh/boards/, \
+	     $(filter-out ., $(patsubst %,%/,$(machdir-y))))
 endif
 
 # Companion chips
@@ -157,19 +157,31 @@ include/asm-sh/.cpu: $(wildcard include/config/cpu/*.h) \
 #	Most boards have their own mach directories.  For the ones that
 #	don't, just reference the parent directory so the semantics are
 #	kept roughly the same.
+#
+#	When multiple boards are compiled in at the same time, preference
+#	for the mach link is given to whichever has a directory for its
+#	headers. However, this is only a workaround until platforms that
+#	can live in the same kernel image back away from relying on the
+#	mach link.
 
 include/asm-sh/.mach: $(wildcard include/config/sh/*.h) \
 		      include/config/auto.conf FORCE
-	@echo -n '  SYMLINK include/asm-sh/mach -> '
 	$(Q)if [ ! -d include/asm-sh ]; then mkdir -p include/asm-sh; fi
-	$(Q)if [ -d $(incdir-prefix)$(incdir-y) ]; then \
-		echo -e 'include/asm-sh/$(incdir-y)'; \
-		ln -fsn $(incdir-prefix)$(incdir-y) \
+	$(Q)rm -f include/asm-sh/mach
+	$(Q)for i in $(incdir-y); do \
+	if [ -d $(incdir-prefix)$$i ]; then \
+		echo -n '  SYMLINK include/asm-sh/mach -> '; \
+		echo -e "include/asm-sh/$$i"; \
+		ln -fsn $(incdir-prefix)$$i \
 			include/asm-sh/mach; \
 	else \
-		echo -e 'include/asm-sh'; \
-		ln -fsn $(incdir-prefix) include/asm-sh/mach; \
-	fi
+		if [ ! -d include/asm-sh/mach ]; then \
+			echo -n '  SYMLINK include/asm-sh/mach -> '; \
+			echo -e 'include/asm-sh'; \
+			ln -fsn $(incdir-prefix) include/asm-sh/mach; \
+		fi; \
+	fi; \
+	done
 	@touch $@
 
 archprepare: include/asm-sh/.cpu include/asm-sh/.mach maketools

include/asm-sh/machvec_init.h

@@ -14,6 +14,6 @@
 
 #define __initmv __attribute__((unused,__section__ (".machvec.init")))
 #define ALIAS_MV(system) \
-  asm(".global sh_mv\nsh_mv = mv_"#system );
+  asm(".weak sh_mv\nsh_mv = mv_"#system );
 
 #endif /* __SH_MACHVEC_INIT_H */