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=$(BUILD_DIR)/buildroot-kernel
  29 LINUX_BINLOC=arch/$(LINUX_KARCH)/brcm-boards/bcm947xx/compressed/vmlinuz
  30 # Used by pcmcia-cs and others
  31 LINUX_SOURCE_DIR=$(LINUX_DIR)
  32
  33 # kernel stuff extracted from linksys firmware GPL sourcetree
  34 # WRT54GS_3_37_2_1109_US (shared,include,wl,et)
  35 LINKSYS_KERNEL_TGZ=linksys-kernel.tar.gz
  36
  37 TARGET_MODULES_DIR=$(TARGET_DIR)/lib/modules/$(LINUX_VERSION)
  38
  39 $(DL_DIR)/$(LINUX_SOURCE):
  40         -mkdir -p $(DL_DIR)
  41         $(WGET) -P $(DL_DIR) $(LINUX_SITE)/$(LINUX_SOURCE)
  42
  43 $(DL_DIR)/$(LINKSYS_KERNEL_TGZ):
  44         $(WGET) -P $(DL_DIR) $(LINKSYS_TGZ_SITE)/$(LINKSYS_KERNEL_TGZ)
  45
  46 $(LINUX_DIR)/.unpacked: $(DL_DIR)/$(LINUX_SOURCE) $(DL_DIR)/$(LINKSYS_KERNEL_TGZ)
  47         -mkdir -p $(BUILD_DIR)
  48         (cd $(BUILD_DIR); tar jxvf $(DL_DIR)/$(LINUX_SOURCE))
  49         -mkdir -p $(TOOL_BUILD_DIR)
  50         -(cd $(TOOL_BUILD_DIR); ln -sf $(LINUX_DIR) linux)
  51         toolchain/patch-kernel.sh $(LINUX_DIR) package/linux/kernel-patches
  52         -cp $(LINUX_KCONFIG) $(LINUX_DIR)/.config
  53         # extract linksys binary kernel stuff and include/shared files
  54         zcat $(DL_DIR)/$(LINKSYS_KERNEL_TGZ) | tar -C $(BUILD_DIR) $(TAR_OPTIONS) -
  55         touch $(LINUX_DIR)/.unpacked
  56
  57 $(LINUX_KCONFIG):
  58         @if [ ! -f "$(LINUX_KCONFIG)" ] ; then \
  59                 echo ""; \
  60                 echo "You should create a .config for your kernel"; \
  61                 echo "and install it as $(LINUX_KCONFIG)"; \
  62                 echo ""; \
  63                 sleep 5; \
  64         fi;
  65
  66 $(LINUX_DIR)/.configured:  $(LINUX_DIR)/.unpacked  $(LINUX_KCONFIG)
  67         $(SED) "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(KERNEL_CROSS),g;" $(LINUX_DIR)/Makefile
  68         $(SED) "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(KERNEL_CROSS),g;" $(LINUX_DIR)/arch/mips/Makefile
  69         $(SED) "s,\-mcpu=,\-mtune=,g;" $(LINUX_DIR)/arch/mips/Makefile
  70         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) oldconfig include/linux/version.h
  71         touch $(LINUX_DIR)/.configured
  72
  73 $(LINUX_DIR)/.depend_done:  $(LINUX_DIR)/.configured
  74         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) dep
  75         touch $(LINUX_DIR)/.depend_done
  76
  77 $(LINUX_DIR)/$(LINUX_BINLOC): $(LINUX_DIR)/.depend_done
  78         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) $(LINUX_FORMAT)
  79         $(MAKE) -C $(LINUX_DIR) ARCH=$(LINUX_KARCH) PATH=$(TARGET_PATH) modules
  80
  81 $(LINUX_KERNEL): $(LINUX_DIR)/$(LINUX_BINLOC)
  82         cp -fa $(LINUX_DIR)/$(LINUX_BINLOC) $(LINUX_KERNEL)
  83         touch -c $(LINUX_KERNEL)
  84
  85 $(LINUX_DIR)/.modules_done: $(LINUX_KERNEL)
  86         rm -rf $(BUILD_DIR)/modules
  87         $(MAKE) -C $(LINUX_DIR) DEPMOD=true INSTALL_MOD_PATH=$(BUILD_DIR)/modules modules_install
  88         tar -C $(BUILD_DIR)/modules/lib -cjf openwrt-kmodules.tar.bz2 modules
  89         touch $(LINUX_DIR)/.modules_done
  90
  91
  92 $(STAGING_DIR)/include/linux/version.h: $(LINUX_DIR)/.configured
  93         mkdir -p $(STAGING_DIR)/include
  94         tar -ch -C $(LINUX_DIR)/include -f - linux | tar -xf - -C $(STAGING_DIR)/include/
  95         tar -ch -C $(LINUX_DIR)/include -f - asm | tar -xf - -C $(STAGING_DIR)/include/
  96
  97 linux: $(LINUX_DIR)/.modules_done $(TARGET_MODULES_DIR)
  98
  99 $(TARGET_MODULES_DIR):
 100         -mkdir -p $(TARGET_MODULES_DIR)
 101         cp $(LINUX_DIR)/drivers/net/wl/wl.o $(TARGET_MODULES_DIR)
 102         cp $(LINUX_DIR)/drivers/net/et/et.o $(TARGET_MODULES_DIR)
 103         cp $(LINUX_DIR)/drivers/net/diag/diag.o $(TARGET_MODULES_DIR)
 104
 105 linux-source: $(DL_DIR)/$(LINUX_SOURCE)
 106
 107 # This has been renamed so we do _NOT_ by default run this on 'make clean'
 108 linuxclean: clean
 109         rm -f $(LINUX_KERNEL)
 110         -$(MAKE) -C $(LINUX_DIR) clean
 111
 112 linux-dirclean:
 113         rm -rf $(LINUX_DIR)
 114
 115 linux-headers: $(LINUX_DIR)/.configured
 116
 117 endif