aboutsummaryrefslogtreecommitdiff
path: root/board/raspberrypi
diff options
context:
space:
mode:
authorGravatar Gustavo Zacarias <gustavo@zacarias.com.ar>2015-12-31 10:28:08 -0300
committerGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2015-12-31 15:22:48 +0100
commit8dd797a05498692b89841c570b97b9d10467399a (patch)
tree6c41822fbea3f25d80be3641524c60a29a5bd391 /board/raspberrypi
parent217171565fe7c1d8b3bdfe538da11ed190f46b28 (diff)
downloadbuildroot-8dd797a05498692b89841c570b97b9d10467399a.tar.gz
buildroot-8dd797a05498692b89841c570b97b9d10467399a.tar.bz2
configs/raspberrypi*: update them to use genimage
Update the raspberrypi and raspberrypi2 configs to use genimage directly to build the image. Update the documentation to reflect this, and drop the volatile rootfs option since it doesn't make much sense and it's not easily integrated with the genimage configurations. Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'board/raspberrypi')
-rw-r--r--board/raspberrypi/genimage-raspberrypi.cfg31
-rw-r--r--board/raspberrypi/genimage-raspberrypi2.cfg30
-rwxr-xr-xboard/raspberrypi/post-image.sh22
-rw-r--r--board/raspberrypi/readme.txt110
4 files changed, 100 insertions, 93 deletions
diff --git a/board/raspberrypi/genimage-raspberrypi.cfg b/board/raspberrypi/genimage-raspberrypi.cfg
new file mode 100644
index 0000000000..45be4d0123
--- /dev/null
+++ b/board/raspberrypi/genimage-raspberrypi.cfg
@@ -0,0 +1,31 @@
+image boot.vfat {
+ vfat {
+ files = {
+ "bcm2708-rpi-b.dtb",
+ "bcm2708-rpi-b-plus.dtb",
+ "rpi-firmware/bootcode.bin",
+ "rpi-firmware/cmdline.txt",
+ "rpi-firmware/config.txt",
+ "rpi-firmware/fixup.dat",
+ "rpi-firmware/start.elf",
+ "kernel-marked/zImage"
+ }
+ }
+ size = 32M
+}
+
+image sdcard.img {
+ hdimage {
+ }
+
+ partition boot {
+ partition-type = 0xC
+ bootable = "true"
+ image = "boot.vfat"
+ }
+
+ partition rootfs {
+ partition-type = 0x83
+ image = "rootfs.ext4"
+ }
+}
diff --git a/board/raspberrypi/genimage-raspberrypi2.cfg b/board/raspberrypi/genimage-raspberrypi2.cfg
new file mode 100644
index 0000000000..443c821872
--- /dev/null
+++ b/board/raspberrypi/genimage-raspberrypi2.cfg
@@ -0,0 +1,30 @@
+image boot.vfat {
+ vfat {
+ files = {
+ "bcm2709-rpi-2-b.dtb",
+ "rpi-firmware/bootcode.bin",
+ "rpi-firmware/cmdline.txt",
+ "rpi-firmware/config.txt",
+ "rpi-firmware/fixup.dat",
+ "rpi-firmware/start.elf",
+ "kernel-marked/zImage"
+ }
+ }
+ size = 32M
+}
+
+image sdcard.img {
+ hdimage {
+ }
+
+ partition boot {
+ partition-type = 0xC
+ bootable = "true"
+ image = "boot.vfat"
+ }
+
+ partition rootfs {
+ partition-type = 0x83
+ image = "rootfs.ext4"
+ }
+}
diff --git a/board/raspberrypi/post-image.sh b/board/raspberrypi/post-image.sh
new file mode 100755
index 0000000000..73ffd658e7
--- /dev/null
+++ b/board/raspberrypi/post-image.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+
+BOARD_DIR="$(dirname $0)"
+BOARD_NAME="$(basename ${BOARD_DIR})"
+GENIMAGE_CFG="${BOARD_DIR}/genimage-${BOARD_NAME}.cfg"
+GENIMAGE_TMP="${BUILD_DIR}/genimage.tmp"
+
+# Mark the kernel as DT-enabled
+mkdir -p "${BINARIES_DIR}/kernel-marked"
+${HOST_DIR}/usr/bin/mkknlimg "${BINARIES_DIR}/zImage" \
+ "${BINARIES_DIR}/kernel-marked/zImage"
+
+rm -rf "${GENIMAGE_TMP}"
+
+genimage \
+ --rootpath "${TARGET_DIR}" \
+ --tmppath "${GENIMAGE_TMP}" \
+ --inputpath "${BINARIES_DIR}" \
+ --outputpath "${BINARIES_DIR}" \
+ --config "${GENIMAGE_CFG}"
+
+exit $?
diff --git a/board/raspberrypi/readme.txt b/board/raspberrypi/readme.txt
index cf9587997f..b21a75a6ee 100644
--- a/board/raspberrypi/readme.txt
+++ b/board/raspberrypi/readme.txt
@@ -8,14 +8,6 @@ These instructions apply to all models of the Raspberry Pi:
- the "enhanced" models A+ and B+,
- the model B2 (aka Raspberry Pi 2).
-To be able to use your Raspberry Pi board with the images generated by
-Buildroot, you have to choose whether you will use:
-
- * Volatile rootfs in RAM (the rootfs is an initramfs) or
- * Persistent rootfs on the SDCard
-
-Also, a good source of information is http://elinux.org/R-Pi_Hub
-
How to build it
===============
@@ -33,16 +25,6 @@ And for model 2 B:
$ make raspberrypi2_defconfig
-If you want to use a persistent rootfs, skip to "Build the rootfs", below.
-
-For a volatile rootfs, you have to slightly adjust the configuration:
-
- $ make menuconfig
- * Select "Filesystem images"
- * Select "initial RAM filesystem linked into linux kernel"
-
-You may also deselect "tar the root filesystem".
-
Build the rootfs
----------------
@@ -53,7 +35,7 @@ You may now build your rootfs with:
$ make
-(This may take a while; consider getting yourself a coffee ;-) )
+(This may take a while, consider getting yourself a coffee ;-) )
Result of the build
-------------------
@@ -61,93 +43,35 @@ Result of the build
After building, you should obtain this tree:
output/images/
- +-- rootfs.tar [0]
+ +-- bcm2708-rpi-b.dtb [1]
+ +-- bcm2708-rpi-b-plus.dtb [1]
+ +-- bcm2709-rpi-2-b.dtb [1]
+ +-- boot.vfat
+ +-- kernel-marked/zImage [2]
+ +-- rootfs.ext4
+-- rpi-firmware/
| +-- bootcode.bin
+ | +-- cmdline.txt
| +-- config.txt
| +-- fixup.dat
| `-- start.elf
- +-- bcm2708-rpi-b.dtb [1]
- +-- bcm2708-rpi-b-plus.dtb [1]
- +-- bcm2709-rpi-2-b.dtb [1]
+ +-- sdcard.img
`-- zImage
-[0] Note for Volatile: rootfs.tar will only be there if you kept
- "tar the root filesystem" option selected in "Filesystem images".
-
[1] Not all of them will be present, depending on the RaspberryPi
model you are using.
-Prepare you SDCard
-==================
-
-For more information, visit
-http://elinux.org/RPi_Advanced_Setup#Advanced_SD_card_setup
-
-In summary, your SDCard must have first partition in fat32 and marked bootable.
-
-Create the required partitions:
- - for a persistent rootfs, 10MiB is enough memory for the boot fat32
- partition, and a second partition is required for the root filesystem
- - for a volatile rootfs, 50MiB is required for the boot fat32 partition
-
-Note: You can create any number of partitions you desire, the only requirement
-is that the first partition must be using fat32 and be bootable.
-
-Mount the partitions (adjust 'sdX' to match your SDcard device):
-
- $ sudo mount /dev/sdX1 /mnt/mountpointboot
- $ sudo mount /dev/sdX2 /mnt/mountpointroot (only for persistent rootfs)
-
-Install the binaries to the SDCard
-----------------------------------
-
-At the root of the boot partition, the Raspberry Pi must find the following
-files:
-
- * bcm2708-rpi-b.dtb [2]
- * bcm2708-rpi-b-plus.dtb [3]
- * bcm2709-rpi-2-b.dtb [4]
- * bootcode.bin
- * config.txt
- * fixup.dat
- * start.elf
- * zImage
-
-[2] For models A and B
-[3] For models A+ and B+
-[4] For model 2
-
-For example:
-
- $ cp output/images/rpi-firmware/* /mnt/mountpointboot
- $ cp output/images/*.dtb /mnt/mountpointboot
-
-The kernel image must be marked with a special header so that the
-bootloader of the RaspberryPi knows it supports Device Tree:
-
- $ ./output/host/usr/bin/mkknlimg output/images/zImage /mnt/mountpointboot/zImage
-
-Note: The kernel image file name is defined in config.txt like this:
-kernel=zImage
-
-If you use a volatile rootfs, Skip to "Finish", below. For a persistent
-rootfs, there are further steps to do.
-
-Extract (as root!) the contents of the rootfs.tar archive into the second
-partition you created above:
-
- $ sudo tar xf ./output/images/rootfs.tar -C /mnt/mountpointroot
+[2] This is the mkknlimg DT-marked kernel.
-Finish
-======
+How to write the SD card
+========================
-Unmount all the partitions:
+Once the build process is finished you will have an image called "sdcard.img"
+in the output/images/ directory.
- $ sudo umount /mnt/mountpointboot
- $ sudo umount /mnt/mountpointroot (only for persistent rootfs)
+Copy the bootable "sdcard.img" onto an SD card with "dd":
-And eject your SDcard from your computer SDcard reader.
+ $ sudo dd if=output/images/sdcard.img of=/dev/sdX
Insert the SDcard into your Raspberry Pi, and power it up. Your new system
-should come up, now.
+should come up now.