File in this directory:
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File in this directory:
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initrd A disk image needed if you want to build the
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initrd A disk image needed if you want to build the
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Amber Linux kernel from sources
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Amber Linux kernel from sources
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patch-2.4.27-amber2.bz2 Amber Linux patch file
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patch-2.4.27-amber2.bz2 Amber Linux patch file
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patch-2.4.27-vrs1.bz2 ARM Linux patch file
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patch-2.4.27-vrs1.bz2 ARM Linux patch file
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README.txt This file
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README.txt This file
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vmlinux Kernel executable file
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vmlinux Kernel executable file
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vmlinux.dis Kernel disassembly file
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vmlinux.dis.bz2 Kernel disassembly file, bzip2 compressed
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vmlinux.mem Kernel .mem file for Verilog simulations
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vmlinux.mem.bz2 Kernel .mem file for Verilog simulations, bzip2 compressed
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If you build the kernal from source these 2 files
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If you build the kernal from source these 2 files
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get replaced.
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get replaced.
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# +++++++++++++++++++++++++++++++++++++++++++
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# +++++++++++++++++++++++++++++++++++++++++++
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# How to run Amber Linux kernel on a development board
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# How to run Amber Linux kernel on a development board
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# +++++++++++++++++++++++++++++++++++++++++++
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# +++++++++++++++++++++++++++++++++++++++++++
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1. Download the bitfile to configure the FPGA using Impact ir Chipscope
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1. Download the bitfile to configure the FPGA using Impact ir Chipscope
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2. Connect HyperTerminal to the serial port on the FPGA to connect to the boot loader
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2. Connect HyperTerminal to the serial port on the FPGA to connect to the boot loader
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3. Download the disk image
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3. Download the disk image
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> b 800000
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> b 800000
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Then select the file $AMBER_BASE/sw/vmlinux/initrd to transfer
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Then select the file $AMBER_BASE/sw/vmlinux/initrd to transfer
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4. Download the kernel image
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4. Download the kernel image
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> l
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> l
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Then select the file $AMBER_BASE/sw/vmlinux/vmlinux to transfer
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Then select the file $AMBER_BASE/sw/vmlinux/vmlinux to transfer
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5. Execute th ekernel
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5. Execute th ekernel
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> j
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> j
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# +++++++++++++++++++++++++++++++++++++++++++
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# +++++++++++++++++++++++++++++++++++++++++++
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# How to build Amber Linux kernel from source
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# How to build Amber Linux kernel from source
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# +++++++++++++++++++++++++++++++++++++++++++
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# +++++++++++++++++++++++++++++++++++++++++++
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# If you also want to create your own initrd disk image,
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# If you also want to create your own initrd disk image,
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# then follow that procedure (below) first.
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# then follow that procedure (below) first.
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# Set the location on your system where the Amber project is located
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# Set the location on your system where the Amber project is located
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export AMBER_BASE=/proj/opencores-svn/trunk
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export AMBER_BASE=/proj/opencores-svn/trunk
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# Pick a directory on your system where you want to build Linux
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# Pick a directory on your system where you want to build Linux
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export LINUX_WORK_DIR=/proj/amber2-linux
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export LINUX_WORK_DIR=/proj/amber2-linux
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export AMBER_CROSSTOOL=arm-none-linux-gnueabi
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export AMBER_CROSSTOOL=arm-none-linux-gnueabi
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# Create the Linux build directory
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# Create the Linux build directory
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test -e ${LINUX_WORK_DIR} || mkdir ${LINUX_WORK_DIR}
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test -e ${LINUX_WORK_DIR} || mkdir ${LINUX_WORK_DIR}
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cd ${LINUX_WORK_DIR}
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cd ${LINUX_WORK_DIR}
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# Download the kernel source
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# Download the kernel source
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wget http://www.kernel.org/pub/linux/kernel/v2.4/linux-2.4.27.tar.gz
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wget http://www.kernel.org/pub/linux/kernel/v2.4/linux-2.4.27.tar.gz
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tar zxf linux-2.4.27.tar.gz
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tar zxf linux-2.4.27.tar.gz
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ln -s linux-2.4.27 linux
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ln -s linux-2.4.27 linux
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cd linux
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cd linux
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#Apply 2 patch files
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#Apply 2 patch files
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cp ${AMBER_BASE}/sw/vmlinux/patch-2.4.27-vrs1.bz2 .
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cp ${AMBER_BASE}/sw/vmlinux/patch-2.4.27-vrs1.bz2 .
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cp ${AMBER_BASE}/sw/vmlinux/patch-2.4.27-amber2.bz2 .
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cp ${AMBER_BASE}/sw/vmlinux/patch-2.4.27-amber2.bz2 .
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bzip2 -d patch-2.4.27-vrs1.bz2
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bzip2 -d patch-2.4.27-vrs1.bz2
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bzip2 -d patch-2.4.27-amber2.bz2
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bzip2 -d patch-2.4.27-amber2.bz2
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patch -p1 < patch-2.4.27-vrs1
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patch -p1 < patch-2.4.27-vrs1
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patch -p1 < patch-2.4.27-amber2
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patch -p1 < patch-2.4.27-amber2
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# Build the kernel and create a .mem file for simulations
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# Build the kernel and create a .mem file for simulations
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make dep
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make dep
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make vmlinux
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make vmlinux
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cp vmlinux vmlinux_unstripped
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cp vmlinux vmlinux_unstripped
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${AMBER_CROSSTOOL}-objcopy -R .comment -R .note vmlinux
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${AMBER_CROSSTOOL}-objcopy -R .comment -R .note vmlinux
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${AMBER_CROSSTOOL}-objcopy --change-addresses -0x02000000 vmlinux
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${AMBER_CROSSTOOL}-objcopy --change-addresses -0x02000000 vmlinux
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$AMBER_BASE/sw/tools/amber-elfsplitter vmlinux > vmlinux.mem
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$AMBER_BASE/sw/tools/amber-elfsplitter vmlinux > vmlinux.mem
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# Add the ram disk image to the .mem file
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# Add the ram disk image to the .mem file
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$AMBER_BASE/sw/tools/amber-bin2mem ${AMBER_BASE}/sw/vmlinux/initrd 800000 >> vmlinux.mem
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$AMBER_BASE/sw/tools/amber-bin2mem ${AMBER_BASE}/sw/vmlinux/initrd 800000 >> vmlinux.mem
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${AMBER_CROSSTOOL}-objdump -C -S -EL vmlinux_unstripped > vmlinux.dis
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${AMBER_CROSSTOOL}-objdump -C -S -EL vmlinux_unstripped > vmlinux.dis
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cp vmlinux.mem $AMBER_BASE/sw/vmlinux/vmlinux.mem
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cp vmlinux.mem $AMBER_BASE/sw/vmlinux/vmlinux.mem
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cp vmlinux.dis $AMBER_BASE/sw/vmlinux/vmlinux.dis
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cp vmlinux.dis $AMBER_BASE/sw/vmlinux/vmlinux.dis
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# Run the Linux simulation to verify that you have a good kernel image
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# Run the Linux simulation to verify that you have a good kernel image
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cd $AMBER_BASE/hw/sim
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cd $AMBER_BASE/hw/sim
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run vmlinux
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run vmlinux
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# +++++++++++++++++++++++++++++++++++++++++++
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# +++++++++++++++++++++++++++++++++++++++++++
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# How to create your own initrd file
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# How to create your own initrd file
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# +++++++++++++++++++++++++++++++++++++++++++
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# +++++++++++++++++++++++++++++++++++++++++++
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This file is the disk image that Linux mounts as
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This file is the disk image that Linux mounts as
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part of the boot process. It contains a bare bones Linux directory
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part of the boot process. It contains a bare bones Linux directory
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structure and an init file (which is just hello-world renamed).
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structure and an init file (which is just hello-world renamed).
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# Set the location on your system where the Amber project is located
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# Set the location on your system where the Amber project is located
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export AMBER_BASE=/proj/opencores-svn/trunk
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export AMBER_BASE=/proj/opencores-svn/trunk
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# Pick a directory on your system where you want to build Linux
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# Pick a directory on your system where you want to build Linux
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export LINUX_WORK_DIR=/proj/amber2-linux
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export LINUX_WORK_DIR=/proj/amber2-linux
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cd ${LINUX_WORK_DIR}
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cd ${LINUX_WORK_DIR}
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# Need root permissions to mount disks
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# Need root permissions to mount disks
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su root
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su root
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dd if=/dev/zero of=initrd bs=200k count=1
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dd if=/dev/zero of=initrd bs=200k count=1
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mke2fs -F -m0 -b 1024 initrd
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mke2fs -F -m0 -b 1024 initrd
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mkdir mnt
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mkdir mnt
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mount -t ext2 -o loop initrd ${LINUX_WORK_DIR}/mnt
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mount -t ext2 -o loop initrd ${LINUX_WORK_DIR}/mnt
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# Add files
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# Add files
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mkdir ${LINUX_WORK_DIR}/mnt/sbin
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mkdir ${LINUX_WORK_DIR}/mnt/sbin
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mkdir ${LINUX_WORK_DIR}/mnt/dev
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mkdir ${LINUX_WORK_DIR}/mnt/dev
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mkdir ${LINUX_WORK_DIR}/mnt/bin
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mkdir ${LINUX_WORK_DIR}/mnt/bin
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mkdir ${LINUX_WORK_DIR}/mnt/etc
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mkdir ${LINUX_WORK_DIR}/mnt/etc
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mkdir ${LINUX_WORK_DIR}/mnt/proc
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mkdir ${LINUX_WORK_DIR}/mnt/proc
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mkdir ${LINUX_WORK_DIR}/mnt/lib
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mkdir ${LINUX_WORK_DIR}/mnt/lib
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mknod ${LINUX_WORK_DIR}/mnt/dev/console c 5 1
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mknod ${LINUX_WORK_DIR}/mnt/dev/console c 5 1
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mknod ${LINUX_WORK_DIR}/mnt/dev/tty2 c 4 2
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mknod ${LINUX_WORK_DIR}/mnt/dev/tty2 c 4 2
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mknod ${LINUX_WORK_DIR}/mnt/dev/null c 1 3
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mknod ${LINUX_WORK_DIR}/mnt/dev/null c 1 3
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mknod ${LINUX_WORK_DIR}/mnt/dev/loop0 b 7 0
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mknod ${LINUX_WORK_DIR}/mnt/dev/loop0 b 7 0
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chmod 600 ${LINUX_WORK_DIR}/mnt/dev/*
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chmod 600 ${LINUX_WORK_DIR}/mnt/dev/*
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cp $AMBER_BASE/sw/hello-world/hello-world.flt ${LINUX_WORK_DIR}/mnt/sbin/init
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cp $AMBER_BASE/sw/hello-world/hello-world.flt ${LINUX_WORK_DIR}/mnt/sbin/init
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chmod +x ${LINUX_WORK_DIR}/mnt/sbin/init
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chmod +x ${LINUX_WORK_DIR}/mnt/sbin/init
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# Check
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# Check
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df ${LINUX_WORK_DIR}/mnt
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df ${LINUX_WORK_DIR}/mnt
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# Unmount
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# Unmount
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umount ${LINUX_WORK_DIR}/mnt
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umount ${LINUX_WORK_DIR}/mnt
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rm -rf ${LINUX_WORK_DIR}/mnt
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rm -rf ${LINUX_WORK_DIR}/mnt
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exit
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exit
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cp initrd $AMBER_BASE/sw/vmlinux
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cp initrd $AMBER_BASE/sw/vmlinux
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