[efi] Centralise architecture-independent EFI Makefile and linker script

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/Makefile.efi

@@ -0,0 +1,46 @@
+# -*- makefile -*- : Force emacs to use Makefile mode
+
+# The EFI linker script
+#
+LDSCRIPT	= scripts/efi.lds
+
+# Retain relocation information for elf2efi
+#
+LDFLAGS		+= -q -S
+
+# Media types.
+#
+NON_AUTO_MEDIA	+= efi
+NON_AUTO_MEDIA	+= efidrv
+NON_AUTO_MEDIA	+= drv.efi
+NON_AUTO_MEDIA	+= efirom
+
+# Include SNP driver in the all-drivers build
+#
+DRIVERS_net += snp
+
+# Rules for building EFI files
+#
+$(BIN)/%.efi : $(BIN)/%.efi.tmp $(ELF2EFI)
+	$(QM)$(ECHO) "  [FINISH] $@"
+	$(Q)$(ELF2EFI) --subsystem=10 $< $@
+
+$(BIN)/%.efidrv : $(BIN)/%.efidrv.tmp $(ELF2EFI)
+	$(QM)$(ECHO) "  [FINISH] $@"
+	$(Q)$(ELF2EFI) --subsystem=11 $< $@
+
+$(BIN)/%.drv.efi : $(BIN)/%.efidrv
+	$(QM)$(ECHO) "  [FINISH] $@"
+	$(Q)$(CP) $< $@
+
+$(BIN)/%.efirom : $(BIN)/%.efidrv $(EFIROM)
+	$(QM)$(ECHO) "  [FINISH] $@"
+	$(Q)$(EFIROM) -v $(TGT_PCI_VENDOR) -d $(TGT_PCI_DEVICE) $< $@
+
+$(BIN)/efidrv.cab : $(BIN)/alldrv.efis # $(ALL_drv.efi) is not yet defined
+	$(QM)$(ECHO) "  [CAB] $@"
+	$(Q)$(LCAB) -n -q $(ALL_drv.efi) $@
+
+$(BIN)/%.usb : $(BIN)/%.efi
+	$(QM)$(ECHO) "  [GENEFIDSK] $@"
+	$(Q)bash util/genefidsk -o $@ -b $(EFI_BOOT_FILE) $<

src/arch/x86/Makefile.efi

@@ -1,46 +1,6 @@
 # -*- makefile -*- : Force emacs to use Makefile mode
 
-# The EFI linker script
+# Include generic EFI Makefile
 #
-LDSCRIPT	= arch/x86/scripts/efi.lds
-
-# Retain relocation information for elf2efi
-#
-LDFLAGS		+= -q -S
-
-# Media types.
-#
-NON_AUTO_MEDIA	+= efi
-NON_AUTO_MEDIA	+= efidrv
-NON_AUTO_MEDIA	+= drv.efi
-NON_AUTO_MEDIA	+= efirom
-
-# Include SNP driver in the all-drivers build
-#
-DRIVERS_net += snp
-
-# Rules for building EFI files
-#
-$(BIN)/%.efi : $(BIN)/%.efi.tmp $(ELF2EFI)
-	$(QM)$(ECHO) "  [FINISH] $@"
-	$(Q)$(ELF2EFI) --subsystem=10 $< $@
-
-$(BIN)/%.efidrv : $(BIN)/%.efidrv.tmp $(ELF2EFI)
-	$(QM)$(ECHO) "  [FINISH] $@"
-	$(Q)$(ELF2EFI) --subsystem=11 $< $@
-
-$(BIN)/%.drv.efi : $(BIN)/%.efidrv
-	$(QM)$(ECHO) "  [FINISH] $@"
-	$(Q)$(CP) $< $@
-
-$(BIN)/%.efirom : $(BIN)/%.efidrv $(EFIROM)
-	$(QM)$(ECHO) "  [FINISH] $@"
-	$(Q)$(EFIROM) -v $(TGT_PCI_VENDOR) -d $(TGT_PCI_DEVICE) $< $@
-
-$(BIN)/efidrv.cab : $(BIN)/alldrv.efis # $(ALL_drv.efi) is not yet defined
-	$(QM)$(ECHO) "  [CAB] $@"
-	$(Q)$(LCAB) -n -q $(ALL_drv.efi) $@
-
-$(BIN)/%.usb : $(BIN)/%.efi
-	$(QM)$(ECHO) "  [GENEFIDSK] $@"
-	$(Q)bash util/genefidsk -o $@ -b $(EFI_BOOT_FILE) $<
+MAKEDEPS	+= Makefile.efi
+include Makefile.efi