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1 | 1 | # |
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2 | 2 | # Kernel installation |
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3 | 3 | # |
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4 | 4 | |
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5 | 5 | . ./functions.sh |
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6 | 6 | |
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7 | 7 | # Fetch and build latest raspberry kernel |
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8 | 8 | if [ "$BUILD_KERNEL" = true ] ; then |
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9 | 9 | # Fetch current raspberrypi kernel sources |
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10 | 10 | git -C $R/usr/local/src clone --depth=1 https://github.com/raspberrypi/linux |
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11 | 11 | |
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12 | 12 | # Load default raspberry kernel configuration |
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13 | 13 | make -C $R/usr/local/src/linux ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcm2709_defconfig |
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14 | 14 | |
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15 | 15 | # Cross compile kernel and modules |
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16 | 16 | make -C $R/usr/local/src/linux -j$(grep -c processor /proc/cpuinfo) ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage modules dtbs |
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17 | 17 | |
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18 | 18 | # Install kernel modules |
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19 | 19 | make -C $R/usr/local/src/linux ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=../.. modules_install |
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20 | 20 | |
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21 | 21 | # Install kernel headers |
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22 | 22 | if [ "$KERNEL_HEADERS" = true ]; then |
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23 | 23 | make -C $R/usr/local/src/linux ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_HDR_PATH=../../usr headers_install |
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24 | 24 | fi |
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25 | 25 | |
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26 | 26 | # Copy and rename compiled kernel to boot directory |
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27 | 27 | mkdir $R/boot/firmware/ |
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28 | 28 | $R/usr/local/src/linux/scripts/mkknlimg $R/usr/local/src/linux/arch/arm/boot/zImage $R/boot/firmware/kernel7.img |
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29 | 29 | |
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30 | 30 | # Copy dts and dtb device definitions |
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31 | 31 | mkdir $R/boot/firmware/overlays/ |
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32 | 32 | cp $R/usr/local/src/linux/arch/arm/boot/dts/*.dtb $R/boot/firmware/ |
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33 | 33 | cp $R/usr/local/src/linux/arch/arm/boot/dts/overlays/*.dtb* $R/boot/firmware/overlays/ |
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34 | 34 | cp $R/usr/local/src/linux/arch/arm/boot/dts/overlays/README $R/boot/firmware/overlays/ |
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35 | 35 | |
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36 | 36 | # Install raspberry bootloader and flash-kernel |
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37 | 37 | chroot_exec apt-get -qq -y --no-install-recommends install raspberrypi-bootloader-nokernel |
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38 | 38 | else |
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39 | 39 | # Kernel installation |
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40 | 40 | chroot_exec apt-get -qq -y --no-install-recommends install linux-image-${KERNEL} raspberrypi-bootloader-nokernel |
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41 | 41 | |
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42 | 42 | # Install flash-kernel last so it doesn't try (and fail) to detect the platform in the chroot |
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43 | 43 | chroot_exec apt-get -qq -y install flash-kernel |
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44 | 44 | |
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45 | 45 | VMLINUZ="$(ls -1 $R/boot/vmlinuz-* | sort | tail -n 1)" |
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46 | 46 | [ -z "$VMLINUZ" ] && exit 1 |
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47 | 47 | cp $VMLINUZ $R/boot/firmware/kernel7.img |
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48 | 48 | fi |
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49 | 49 | |
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50 | 50 | # Set up firmware boot cmdline |
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51 | CMDLINE="dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait net.ifnames=1 console=tty1" | |
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51 | CMDLINE="dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait net.ifnames=1 console=tty1 ${CMDLINE}" | |
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52 | 52 | |
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53 | 53 | # Set up serial console support (if requested) |
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54 | 54 | if [ "$ENABLE_CONSOLE" = true ] ; then |
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55 | 55 | CMDLINE="${CMDLINE} console=ttyAMA0,115200 kgdboc=ttyAMA0,115200" |
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56 | 56 | fi |
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57 | 57 | |
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58 | 58 | # Set up IPv6 networking support |
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59 | 59 | if [ "$ENABLE_IPV6" = false ] ; then |
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60 | 60 | CMDLINE="${CMDLINE} ipv6.disable=1" |
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61 | 61 | fi |
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62 | 62 | |
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63 | 63 | echo "${CMDLINE}" >$R/boot/firmware/cmdline.txt |
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64 | 64 | |
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65 | 65 | # Set up firmware config |
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66 | 66 | install -o root -g root -m 644 files/config.txt $R/boot/firmware/config.txt |
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67 | 67 | |
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68 | 68 | # Load snd_bcm2835 kernel module at boot time |
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69 | 69 | if [ "$ENABLE_SOUND" = true ] ; then |
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70 | 70 | echo "snd_bcm2835" >>$R/etc/modules |
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71 | 71 | fi |
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72 | 72 | |
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73 | 73 | # Set smallest possible GPU memory allocation size: 16MB (no X) |
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74 | 74 | if [ "$ENABLE_MINGPU" = true ] ; then |
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75 | 75 | echo "gpu_mem=16" >>$R/boot/firmware/config.txt |
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76 | 76 | fi |
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77 | 77 | |
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78 | 78 | # Create symlinks |
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79 | 79 | ln -sf firmware/config.txt $R/boot/config.txt |
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80 | 80 | ln -sf firmware/cmdline.txt $R/boot/cmdline.txt |
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81 | 81 | |
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82 | 82 | # Prepare modules-load.d directory |
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83 | 83 | mkdir -p $R/lib/modules-load.d/ |
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84 | 84 | |
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85 | 85 | # Load random module on boot |
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86 | 86 | if [ "$ENABLE_HWRANDOM" = true ] ; then |
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87 | 87 | cat <<EOM >$R/lib/modules-load.d/rpi2.conf |
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88 | 88 | bcm2708_rng |
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89 | 89 | EOM |
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90 | 90 | fi |
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91 | 91 | |
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92 | 92 | # Prepare modprobe.d directory |
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93 | 93 | mkdir -p $R/etc/modprobe.d/ |
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94 | 94 | |
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95 | 95 | # Blacklist sound modules |
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96 | 96 | install -o root -g root -m 644 files/modprobe.d/raspi-blacklist.conf $R/etc/modprobe.d/raspi-blacklist.conf |
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97 | 97 | |
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98 | 98 | # Create default fstab |
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99 | 99 | install -o root -g root -m 644 files/fstab $R/etc/fstab |
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100 | 100 | |
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101 | 101 | # Avoid swapping and increase cache sizes |
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102 | 102 | install -o root -g root -m 644 files/sysctl.d/81-rpi-vm.conf $R/etc/sysctl.d/81-rpi-vm.conf |
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