1# Makefile for making ELF bootable images for booting on CHRP 2# using Open Firmware. 3# 4# Geert Uytterhoeven September 1997 5# 6# Based on coffboot by Paul Mackerras 7# Simplified for ppc64 by Todd Inglett 8# 9# NOTE: this code is built for 32 bit in ELF32 format even though 10# it packages a 64 bit kernel. We do this to simplify the 11# bootloader and increase compatibility with OpenFirmware. 12# 13# To this end we need to define BOOTCC, etc, as the tools 14# needed to build the 32 bit image. These are normally HOSTCC, 15# but may be a third compiler if, for example, you are cross 16# compiling from an intel box. Once the 64bit ppc gcc is 17# stable it will probably simply be a compiler switch to 18# compile for 32bit mode. 19# To make it easier to setup a cross compiler, 20# CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE 21# in the toplevel makefile. 22 23CROSS32_COMPILE = 24#CROSS32_COMPILE = /usr/local/ppc/bin/powerpc-linux- 25 26BOOTCC = $(CROSS32_COMPILE)gcc 27BOOTCFLAGS = $(HOSTCFLAGS) -I$(HPATH) 28BOOTLD = $(CROSS32_COMPILE)ld 29BOOTAS = $(CROSS32_COMPILE)as 30BOOTAFLAGS = -D__ASSEMBLY__ $(HOSTCFLAGS) -I$(HPATH) 31 32OBJCOPYFLAGS = contents,alloc,load,readonly,data 33 34.c.o: 35 $(BOOTCC) $(BOOTCFLAGS) -c -o $*.o $< 36.S.o: 37 $(BOOTCC) $(BOOTAFLAGS) -traditional -c -o $*.o $< 38 39CFLAGS = $(CPPFLAGS) -O -fno-builtin -DSTDC_HEADERS 40LD_ARGS = -Ttext 0x00400000 -e _start 41 42OBJS = crt0.o string.o prom.o zImage.o zlib.o imagesize.o 43#LIBS = $(TOPDIR)/lib/lib.a 44LIBS = 45 46ifeq ($(CONFIG_SMP),y) 47TFTPIMAGE=/tftpboot/zImage.chrp.smp 48else 49TFTPIMAGE=/tftpboot/zImage.chrp 50endif 51 52 53ifeq ($(CONFIG_PPC_ISERIES),y) 54all: vmlinux.sm 55else 56all: $(TOPDIR)/zImage 57endif 58 59 60znetboot: zImage 61 cp zImage $(TFTPIMAGE) 62 63 64ifeq ($(CONFIG_PPC_ISERIES),y) 65 66addSystemMap: addSystemMap.c 67 $(HOSTCC) $(HOSTCFLAGS) -o addSystemMap addSystemMap.c 68 69vmlinux.sm: $(TOPDIR)/vmlinux addSystemMap 70 ./addSystemMap $(TOPDIR)/System.map $(TOPDIR)/vmlinux vmlinux.sm 71 72 73addRamDisk: addRamDisk.c 74 $(HOSTCC) $(HOSTCFLAGS) -o addRamDisk addRamDisk.c 75 76vmlinux.initrd: $(TOPDIR)/vmlinux addRamDisk ramdisk.image.gz $(TOPDIR)/System.map 77 ./addRamDisk ramdisk.image.gz $(TOPDIR)/System.map $(TOPDIR)/vmlinux vmlinux.initrd 78 79vmlinux.sminitrd: vmlinux.sm addRamDisk ramdisk.image.gz $(TOPDIR)/System.map 80 ./addRamDisk ramdisk.image.gz $(TOPDIR)/System.map vmlinux.sm vmlinux.sminitrd 81 82endif 83 84 85znetboot.initrd: zImage.initrd 86 cp zImage.initrd $(TFTPIMAGE) 87 88addnote: addnote.c 89 $(HOSTCC) $(HOSTCFLAGS) -o addnote addnote.c 90 91 92imagesize.c: $(TOPDIR)/vmlinux 93 ls -l $(TOPDIR)/vmlinux | awk '{printf "/* generated -- do not edit! */\nunsigned long vmlinux_filesize = %d;\n", $$5}' > imagesize.c 94 $(CROSS_COMPILE)nm -n $(TOPDIR)/vmlinux | tail -1 | awk '{printf "unsigned long vmlinux_memsize = 0x%s;\n", substr($$1,8)}' >> imagesize.c 95 96vmlinux .config System.map: % : $(TOPDIR)/% 97 gzip -cvf9 $(TOPDIR)/$@ > kernel-$@.gz 98 $(OBJCOPY) zImage.o \ 99 --add-section=.kernel:$@=kernel-$@.gz \ 100 --set-section-flags=.kernel:$@=$(OBJCOPYFLAGS) 101 102initrd: ramdisk.image.gz 103 $(OBJCOPY) zImage.o \ 104 --add-section=.kernel:$@=ramdisk.image.gz \ 105 --set-section-flags=.kernel:$@=$(OBJCOPYFLAGS) 106 107zImage: $(OBJS) addnote vmlinux .config System.map 108 $(BOOTLD) $(LD_ARGS) -T zImage.lds -o $@ $(OBJS) $(LIBS) 109 ./addnote $@ 110 111zImage.initrd: $(OBJS) addnote vmlinux .config System.map initrd 112 $(BOOTLD) $(LD_ARGS) -T zImage.lds -o $@ $(OBJS) $(LIBS) 113 ./addnote $@ 114 115clean: 116 rm -f add{note,RamDisk,SystemMap} $(OBJS) initrd.o \ 117 vmlinux.{sm,initrd} zImage{,.initrd} imagesize.c \ 118 kernel-{vmlinux,.config,System.map}.gz 119 120fastdep: 121 $(TOPDIR)/scripts/mkdep *.[Sch] > .depend 122 123dep: 124 $(CPP) $(CPPFLAGS) -M *.S *.c > .depend 125 126