packages/kernel/kernel.inc

   1 # Common kernel file included by the targets
   2
   3 KERNEL_BASE_DIR ?= linux-$(KERNEL_VERSION)
   4
   5 KERNEL_DIR=$(BUILD_DIR)/kernel
   6 KERNEL_SRC_DIR=$(KERNEL_DIR)/$(KERNEL_BASE_DIR)
   7 KERNEL_STAMP_DIR=$(KERNEL_DIR)/stamps
   8 KERNEL_LOG_DIR=$(KERNEL_DIR)/logs
   9
  10 ifeq ($(CONFIG_TARGET_64BIT),y)
  11 KERNEL_BZIMAGE=$(KERNEL_SRC_DIR)/arch/x86_64/boot/bzImage
  12 KERNEL_BUILD_ARCH=x86_64
  13 else
  14 KERNEL_BZIMAGE=$(KERNEL_SRC_DIR)/arch/i386/boot/bzImage
  15 KERNEL_BUILD_ARCH=i386
  16 endif
  17
  18 ifeq ($(findstring defconfig,$(KERNEL_CONFIG)),defconfig)
  19 ifeq ($(shell if [ -f $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD) ]; then echo 1; fi),1)
  20         KERNEL_CONFIG = $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD)
  21 endif
  22 endif
  23
  24 ifeq ($(CONFIG_VERBOSE),y)
  25 KERNEL_FETCH_LOG=/dev/stdout
  26 KERNEL_BUILD_LOG=/dev/stdout
  27 KERNEL_INSTALL_LOG=/dev/stdout
  28 else
  29 KERNEL_FETCH_LOG=$(KERNEL_LOG_DIR)/fetch.log
  30 KERNEL_BUILD_LOG=$(KERNEL_LOG_DIR)/build.log
  31 KERNEL_INSTALL_LOG=$(KERNEL_LOG_DIR)/install.log
  32 endif
  33
  34 $(KERNEL_STAMP_DIR)/.unpacked-$(KERNEL_VERSION): $(SOURCE_DIR)/$(KERNEL_SOURCE) | $(KERNEL_STAMP_DIR)
  35         @ mkdir -p $(KERNEL_DIR)
  36         @ echo "Unpacking kernel ($(KERNEL_VERSION))..."
  37         @ tar -C $(KERNEL_DIR) -jxf $(SOURCE_DIR)/$(KERNEL_SOURCE)
  38         @ touch $@
  39
  40 $(KERNEL_STAMP_DIR)/.unpacked-tiny: $(SOURCE_DIR)/$(TINY_SOURCE)
  41         @ mkdir -p $(KERNEL_DIR)
  42         @ mkdir -p $(KERNEL_DIR)/tiny
  43         @ echo "Unpacking tiny patches..."
  44         @ tar -C $(KERNEL_DIR)/tiny -xzf $(SOURCE_DIR)/$(TINY_SOURCE)
  45         @ touch $@
  46
  47 ifneq ($(TINY_SOURCE),)
  48 $(KERNEL_STAMP_DIR)/.patched: $(KERNEL_STAMP_DIR)/.unpacked-$(KERNEL_VERSION) $(KERNEL_STAMP_DIR)/.unpacked-tiny
  49 else
  50 $(KERNEL_STAMP_DIR)/.patched: $(KERNEL_STAMP_DIR)/.unpacked-$(KERNEL_VERSION)
  51 endif
  52         @ echo "Patching kernel..."
  53         @ $(BIN_DIR)/doquilt.sh $(KERNEL_SRC_DIR) $(KERNEL_PATCHES)
  54         @ touch $@
  55
  56 $(KERNEL_SRC_DIR)/.config: $(KERNEL_STAMP_DIR)/.patched
  57         @ cat $(KERNEL_CONFIG) | sed -e s:^CONFIG_LOCALVERSION=.*:CONFIG_LOCALVERSION=\"$(ROM_VERSION)\": > $(KERNEL_SRC_DIR)/.config
  58
  59 $(KERNEL_BZIMAGE): $(KERNEL_SRC_DIR)/.config | $(KERNEL_LOG_DIR)
  60         @ echo "Building kernel..."
  61 ifneq ($(findstring defconfig,$(KERNEL_CONFIG)),defconfig)
  62         @ echo "Using custom kernel config $(KERNEL_CONFIG)"
  63 endif
  64         @ $(MAKE) $(PARALLEL_MAKE) -C $(KERNEL_SRC_DIR) ARCH=$(KERNEL_BUILD_ARCH) \
  65         KERNEL_CC="$(CC)" KERNEL_LD="$(LD)" > $(KERNEL_BUILD_LOG) 2>&1
  66         @ mkdir -p $(OUTPUT_DIR)/config/kernel
  67         @ cp $(KERNEL_SRC_DIR)/.config $(OUTPUT_DIR)/config/kernel/
  68
  69 $(OUTPUT_DIR)/bzImage: $(KERNEL_BZIMAGE)
  70         @ install -d $(OUTPUT_DIR)
  71         @ install -m 0644 $< $@
  72
  73 $(OUTPUT_DIR)/vmlinux: $(KERNEL_BZIMAGE)
  74         @ install -d $(OUTPUT_DIR)
  75         @ install -m 0644 $(KERNEL_SRC_DIR)/vmlinux $@
  76
  77 $(KERNEL_STAMP_DIR)/.headers: $(KERNEL_SRC_DIR)/.config $(STAGING_DIR)/host/bin/unifdef | $(KERNEL_LOG_DIR)
  78         @ echo "Installing kernel headers..."
  79         @( export PATH=$(PATH):$(STAGING_DIR)/host/bin; \
  80         $(MAKE) -C $(KERNEL_SRC_DIR) ARCH=$(KERNEL_BUILD_ARCH) \
  81         INSTALL_HDR_PATH=$(STAGING_DIR)/ headers_install > $(KERNEL_INSTALL_LOG) 2>&1)
  82         @ touch $@
  83
  84 $(KERNEL_STAMP_DIR) $(KERNEL_LOG_DIR):
  85         @ mkdir -p $@
  86
  87 generic-kernel: $(OUTPUT_DIR)/bzImage $(OUTPUT_DIR)/vmlinux $(KERNEL_STAMP_DIR)/.headers
  88
  89 generic-kernel-clean:
  90         @ echo "Cleaning kernel..."
  91         @ rm -f $(KERNEL_STAMP_DIR)/.headers
  92 ifneq ($(wildcard $(KERNEL_SRC_DIR)/Makefile),)
  93         $(MAKE) -C $(KERNEL_SRC_DIR) clean > /dev/null 2>&1;
  94 endif
  95
  96 generic-kernel-distclean:
  97         @ rm -rf $(KERNEL_DIR)
  98
  99 kernel-extract: $(KERNEL_STAMP_DIR)/.patched
 100
 101 kernel-config: | $(KERNEL_SRC_DIR)/.config
 102 ifeq ($(shell if [ -f $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD) ]; then echo 1; fi),1)
 103         @ cp -f $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD) $(KERNEL_SRC_DIR)/.config
 104 endif
 105 ifeq (kernel,$(filter kernel,$(PAYLOAD-y)))
 106         @ echo "Configure kernel..."
 107         @ $(MAKE) -C $(KERNEL_SRC_DIR) ARCH=$(KERNEL_BUILD_ARCH) menuconfig
 108         @ echo
 109 ifeq ($(shell if [ -f $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD) ]; then echo 1; fi),1)
 110         @ echo "Found an existing custom configuration file:"
 111         @ echo "  $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD)"
 112         @ echo "I've copied it back to the source directory for modification."
 113         @ echo "Remove the above file and re-run this command if you want to create a new custom configuration from scratch for this payload/board."
 114         @ echo
 115 endif
 116         @ cp -f $(KERNEL_SRC_DIR)/.config $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD)
 117         @ echo "Your custom kernel config file has been saved as $(PACKAGE_DIR)/kernel/conf/customconfig--$(PAYLOAD)--$(KERNEL_BUILD_ARCH)--$(COREBOOT_VENDOR)-$(COREBOOT_BOARD)."
 118         @ echo
 119 else
 120         @ echo "Your payload does not require a kernel."
 121 endif