1 # SPDX-License-Identifier: GPL-2.0 2 # 3 # linux/arch/arm/boot/bootp/Makefile 4 # 5 # This file is included by the global makefile so that you can add your own 6 # architecture-specific flags and dependencies. 7 # 8 9 ifdef PHYS_OFFSET 10 add_hex = $(shell printf 0x%x $$(( $(1) + $(2) )) ) 11 12 # If PHYS_OFFSET is set, INITRD_PHYS and PARAMS_PHYS can be derived, 13 # otherwise they must be passed on the command line. 14 # 15 # Note: the following conditions must always be true: 16 # PARAMS_PHYS must be within 4MB of ZRELADDR 17 # INITRD_PHYS must be in RAM 18 19 PARAMS_PHYS := $(call add_hex, $(PHYS_OFFSET), 0x100) 20 21 # guess an initrd location if possible 22 initrd_offset-$(CONFIG_ARCH_FOOTBRIDGE) += 0x00800000 23 initrd_offset-$(CONFIG_ARCH_SA1100) += 0x00800000 24 initrd_offset-$(CONFIG_ARCH_RPC) += 0x08000000 25 INITRD_OFFSET := $(initrd_offset-y) 26 ifdef INITRD_OFFSET 27 INITRD_PHYS := $(call add_hex, $(PHYS_OFFSET), $(INITRD_OFFSET)) 28 endif 29 30 endif 31 32 PHONY += initrd 33 initrd: 34 @test "$(PARAMS_PHYS)" != "" || \ 35 (echo bootpImage: You must specify PHYS_OFFSET of PARAMS_PHYS ; exit -1) 36 @test "$(INITRD_PHYS)" != "" || \ 37 (echo bootpImage: You must specify INITRD_OFFSET or INITRD_PHYS ; exit -1) 38 @test "$(INITRD)" != "" || \ 39 (echo bootpImage: You must specify INITRD; exit -1) 40 41 LDFLAGS_bootp := --no-undefined -X \ 42 --defsym initrd_phys=$(INITRD_PHYS) \ 43 --defsym params_phys=$(PARAMS_PHYS) -T 44 AFLAGS_initrd.o :=-DINITRD=\"$(INITRD)\" 45 46 targets := bootp init.o kernel.o initrd.o 47 48 # Note that bootp.lds picks up kernel.o and initrd.o 49 $(obj)/bootp: $(src)/bootp.lds $(addprefix $(obj)/,init.o kernel.o initrd.o) FORCE 50 $(call if_changed,ld) 51 52 # kernel.o and initrd.o includes a binary image using 53 # .incbin, a dependency which is not tracked automatically 54 55 $(obj)/kernel.o: arch/arm/boot/zImage FORCE 56 57 $(obj)/initrd.o: initrd $(INITRD) FORCE 58 59 PHONY += $(INITRD)
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