openwrt/package/linux/linux.mk

   1 #############################################################
   2 #
   3 # Linux kernel target for the OpenWRT project
   4 #
   5 # patches are sorted by numbers
   6 # 000   patch between linux-2.4.29 and linux-mips-cvs
   7 # 0xx   linksys patches
   8 # 1xx   OpenWRT patches (diag,compressed,..)
   9 # 2xx   fixes for 2.4.29 integration (wl driver)
  10 # 3xx   kernel feature patches (squashfs,jffs2 compression,..)
  11 # 4xx   patches needed to integrate feature patches
  12 #
  13 #############################################################
  14 ifneq ($(filter $(TARGETS),linux),)
  15
  16 LINUX_FORMAT=zImage
  17 LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
  18         -e 's/mipsel/mips/' \
  19         -e 's/powerpc/ppc/' \
  20         -e 's/sh[234]/sh/' \
  21         )
  22
  23 LINUX_VERSION=2.4.29
  24 LINUX_DIR=$(BUILD_DIR)/linux-$(LINUX_VERSION)
  25 LINUX_SITE=http://www.kernel.org/pub/linux/kernel/v2.4
  26 LINUX_SOURCE=linux-$(LINUX_VERSION).tar.bz2
  27 LINUX_KCONFIG=package/linux/linux.config
  28 LINUX_KERNEL=$(BUILD_DIR)/buildroot-kernel
  29 LINUX_PATCHES=$(PACKAGE_DIR)/linux/kernel-patches
  30 LINUX_BINLOC=arch/$(LINUX_KARCH)/brcm-boards/bcm947xx/compressed/vmlinuz
  31 # Used by pcmcia-cs and others
  32 LINUX_SOURCE_DIR=$(LINUX_DIR)
  33
  34 # kernel stuff extracted from linksys firmware GPL sourcetree
  35 # WRT54GS_3_37_2_1109_US (shared,include,wl,et)
  36 LINKSYS_KERNEL_SITE=http://openwrt.openbsd-geek.de
  37 LINKSYS_KERNEL_TGZ=linksys-kernel.tar.gz
  38
  39 TARGET_MODULES_DIR=$(TARGET_DIR)/lib/modules/$(LINUX_VERSION)
  40
  41 $(DL_DIR)/$(LINKSYS_KERNEL_TGZ):
  42         $(WGET) -P $(DL_DIR) $(LINKSYS_KERNEL_SITE)/$(LINKSYS_KERNEL_TGZ)
  43
  44 $(LINUX_DIR)/.unpacked: $(DL_DIR)/$(LINUX_SOURCE) $(DL_DIR)/$(LINKSYS_KERNEL_TGZ)
  45         -mkdir -p $(BUILD_DIR)
  46         bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
  47         # extract linksys binary kernel stuff and include/shared files
  48         zcat $(DL_DIR)/$(LINKSYS_KERNEL_TGZ) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
  49         touch $(LINUX_DIR)/.unpacked
  50
  51 $(LINUX_DIR)/.patched: $(LINUX_DIR)/.unpacked
  52         $(PATCH) $(LINUX_DIR) $(LINUX_PATCHES)
  53 ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS_LZMA),y)
  54         $(PATCH) $(LINUX_DIR) target/squashfs-lzma/kernel-patch
  55 endif
  56         touch $(LINUX_DIR)/.patched
  57
  58 $(LINUX_DIR)/.configured:  $(LINUX_DIR)/.patched
  59         -cp $(LINUX_KCONFIG) $(LINUX_DIR)/.config
  60         $(SED) "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(KERNEL_CROSS),g;" $(LINUX_DIR)/Makefile
  61         $(SED) "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(KERNEL_CROSS),g;" $(LINUX_DIR)/arch/mips/Makefile
  62         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  63         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) oldconfig include/linux/version.h
  64         touch $(LINUX_DIR)/.configured
  65
  66 $(LINUX_DIR)/.depend_done:  $(LINUX_DIR)/.configured
  67         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) dep
  68         touch $(LINUX_DIR)/.depend_done
  69
  70 $(LINUX_DIR)/$(LINUX_BINLOC): $(LINUX_DIR)/.depend_done
  71         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) $(LINUX_FORMAT)
  72         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) modules
  73
  74 $(LINUX_KERNEL): $(LINUX_DIR)/$(LINUX_BINLOC)
  75         cp -fa $(LINUX_DIR)/$(LINUX_BINLOC) $(LINUX_KERNEL)
  76         touch -c $(LINUX_KERNEL)
  77
  78 $(LINUX_DIR)/.modules_done: $(LINUX_KERNEL)
  79         rm -rf $(BUILD_DIR)/modules
  80         $(MAKE) -C $(LINUX_DIR) DEPMOD=true INSTALL_MOD_PATH=$(BUILD_DIR)/modules modules_install
  81         tar -C $(BUILD_DIR)/modules/lib -cjf openwrt-kmodules.tar.bz2 modules
  82         touch $(LINUX_DIR)/.modules_done
  83
  84 $(STAGING_DIR)/include/linux/version.h: $(LINUX_DIR)/.configured
  85         mkdir -p $(STAGING_DIR)/include
  86         tar -ch -C $(LINUX_DIR)/include -f - linux | tar -xf - -C $(STAGING_DIR)/include/
  87         tar -ch -C $(LINUX_DIR)/include -f - asm | tar -xf - -C $(STAGING_DIR)/include/
  88
  89 $(TARGET_MODULES_DIR):
  90         -mkdir -p $(TARGET_MODULES_DIR)
  91         cp $(LINUX_DIR)/drivers/net/wl/wl.o $(TARGET_MODULES_DIR)
  92         cp $(LINUX_DIR)/drivers/net/et/et.o $(TARGET_MODULES_DIR)
  93         cp $(LINUX_DIR)/drivers/net/diag/diag.o $(TARGET_MODULES_DIR)
  94
  95 linux: $(LINUX_DIR)/.modules_done $(TARGET_MODULES_DIR)
  96
  97 linux-source: $(DL_DIR)/$(LINUX_SOURCE)
  98
  99 # This has been renamed so we do _NOT_ by default run this on 'make clean'
 100 linuxclean: clean
 101         rm -f $(LINUX_KERNEL)
 102         -$(MAKE) -C $(LINUX_DIR) clean
 103
 104 linux-dirclean:
 105         rm -rf $(LINUX_DIR)
 106
 107 endif
 108
 109 #############################################################
 110 #
 111 # Toplevel Makefile options
 112 #
 113 ##############################################################
 114 ifeq ($(strip $(BR2_PACKAGE_LINUX)),y)
 115 TARGETS+=linux
 116 endif