?? wrote:

HI, friends.

I want to update my linux version from 2.6.11 to 2.6.22 on MPC8360 board, I always fail when the linux version is about 2.6.11. Someone told me that I need to build the Flat Device Tree. I see that the U-boot-1.2.0 has one FDT command, but I did not know how to use this command and how to use the Flat Device Tree. I once see a document from freescale that the FDT file need tftp download to DDR memory first then bootm the linux. What's that FDT file? how can i get it? which DDR address that I need to tftp download? What is the FDT? Could someone teach me? Thanks.

Hi ??,

u-boot 1.2.0's support of FDT is crude. Upgrade to the tip o' the tree (1.3.2rc3), or at least to 1.3.1.

The flattened device tree (FDT) is a method of passing hardware configuration information to the kernel. It is described in the kernel documentation directory/file: ./Documentation/powerpc/booting-without-of.txt

You need a recent kernel, 2.6.22 probably is OK. I'm running 2.6.25rc3 (tip 'o the tree as of a week or so ago).

I have a mpc8360emds eval board, so I configure the kernel: $ make mpc836x_mds_defconfig and build it $ make

You can find example device tree source (.dts) files for the device trees in the kernel directory: ./arch/powerpc/boot/dts

You need to compile your .dts (source) file into a .dtb (binary) using the dtc (device tree compiler). After building the kernel, you will find dtc in: ./arch/powerpc/boot/dtc

Copy your kernel, *.dtb, and ramdisk (as appropriate). I'm using the ramdisk from ELDK eldk/ppc_6xx/images/uRamdisk ...and boot away. Addresses are fairly arbitrary, just have to make sure you don't overwrite things.

Boot log: --------- => set serverip 192.168.47.8 ; set ipaddr 192.168.47.214

=> setenv fdtaddr 400000 ; setenv fdtfile mpc8360emds/mpc836x_mds.dtb ; setenv loadaddr 200000 ; setenv uboot mpc8360emds/u-boot.bin ; setenv bootfile mpc8360emds/uImage ; setenv ramdiskaddr 1000000 ; setenv ramdiskfile mpc8360emds/uRamdisk

=> tftp $ramdiskaddr $ramdiskfile ; tftp $fdtaddr $fdtfile ; tftp $loadaddr $bootfile

UEC: PHY is Marvell 88E11x1 (1410cc2) FSL UEC0: Full Duplex switching to rgmii 100 FSL UEC0: Speed 100BT FSL UEC0: Link is up Using FSL UEC0 device TFTP from server 192.168.47.8; our IP address is 192.168.47.214 Filename 'mpc8360emds/uRamdisk'. Load address: 0x1000000 Loading: T ################################################################# ##################################################### done Bytes transferred = 1731966 (1a6d7e hex) Using FSL UEC0 device TFTP from server 192.168.47.8; our IP address is 192.168.47.214 Filename 'mpc8360emds/mpc836x_mds.dtb'. Load address: 0x400000 Loading: # done Bytes transferred = 12288 (3000 hex) Using FSL UEC0 device TFTP from server 192.168.47.8; our IP address is 192.168.47.214 Filename 'mpc8360emds/uImage'. Load address: 0x200000 Loading: ################################################################# ########################## done Bytes transferred = 1329289 (144889 hex) => bootm $loadaddr $ramdiskaddr $fdtaddr ## Booting image at 00200000 ... Image Name: Linux-2.6.25-rc3-00001-g5fb74e4- Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1329225 Bytes = 1.3 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK ## Loading RAMDisk Image at 01000000 ... Image Name: Simple Embedded Linux Framework Image Type: PowerPC Linux RAMDisk Image (gzip compressed) Data Size: 1731902 Bytes = 1.7 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Booting using the fdt at 0x400000 Loading Ramdisk to 0fdfa000, end 0ffa0d3e ... OK Using MPC836x MDS machine description Linux version 2.6.25-rc3-00001-g5fb74e4-dirty (vanbaren@dellserver) (gcc version 4.0.0 (DENX ELDK 4.1 4.0.0)) #1 Mon Feb 25 20:38:46 EST 2008 Found initrd at 0xcfdfa000:0xcffa0d3e console [udbg0] enabled setup_arch: bootmem mpc836x_mds_setup_arch() Found MPC83xx PCI host bridge at 0x00000000e0008500. Firmware bus number: 0->0 PCI host bridge /pci@e0008500 (primary) ranges: MEM 0x00000000a0000000..0x00000000afffffff -> 0x00000000a0000000 MEM 0x0000000080000000..0x000000008fffffff -> 0x0000000080000000 Prefetch IO 0x00000000e2000000..0x00000000e20fffff -> 0x0000000000000000 arch: exit Zone PFN ranges: DMA 0 -> 65536 Normal 65536 -> 65536 Movable zone start PFN for each node early_node_map[1] active PFN ranges 0: 0 -> 65536 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024 Kernel command line: IPIC (128 IRQ sources) at fddf3700 PID hash table entries: 1024 (order: 10, 4096 bytes) clocksource: timebase mult[3c9b26d] shift[22] registered Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) Memory: 254968k/262144k available (2628k kernel code, 6832k reserved, 116k data, 92k bss, 148k init) SLUB: Genslabs=12, HWalign=32, Order=0-1, MinObjects=4, CPUs=1, Nodes=1 Mount-cache hash table entries: 512 net_namespace: 156 bytes NET: Registered protocol family 16

PCI: Probing PCI hardware SCSI subsystem initialized NET: Registered protocol family 2 Time: timebase clocksource has been installed. IP route cache hash table entries: 2048 (order: 1, 8192 bytes) TCP established hash table entries: 8192 (order: 4, 65536 bytes) TCP bind hash table entries: 8192 (order: 3, 32768 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP reno registered checking if image is initramfs...it isn't (no cpio magic); looks like an initrd Freeing initrd memory: 1691k freed io scheduler noop registered io scheduler anticipatory registered (default) io scheduler deadline registered io scheduler cfq registered Generic RTC Driver v1.07 Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing disabled serial8250.0: ttyS0 at MMIO 0xe0004500 (irq = 18) is a 16550A console handover: b oot [udbg0] -> real [ttyS0] serial8250.0: ttyS1 at MMIO 0xe0004600 (irq = 19) is a 16550A brd: module loaded loop: module loaded UCC Ethernet Controller MII Bus: probed ucc_geth: QE UCC Gigabit Ethernet Controller ucc_geth: UCC1 at 0xe0102000 (irq = 22) ucc_geth: UCC2 at 0xe0103000 (irq = 23) i2c /dev entries driver proc_dir_entry 'rtc' already registered Call Trace: [snip a traceback] rtc-ds1374 0-0068: rtc core: registered rtc-ds1374 as rtc0 WDT driver for MPC83xx initialized. mode:reset timeout=65535 (16 seconds) TCP cubic registered NET: Registered protocol family 1 NET: Registered protocol family 17 RPC: Registered udp transport module. RPC: Registered tcp transport module. rtc-ds1374 0-0068: setting system clock to 1971-09-14 13:42:23 UTC (53703743) RAMDISK: Compressed image found at block 0 VFS: Mounted root (ext2 filesystem) readonly. Freeing unused kernel memory: 148k init init started: BusyBox v1.7.1 (2008-02-21 07:55:43 CET) starting pid 732, tty '': '/etc/rc.sh' /etc/rc.sh: line 5: cannot create /etc/mtab: Read-only file system starting pid 737, tty '': '/bin/application' ### Application running ... starting pid 739, tty '': '/bin/sh' ~ #

HTH, gvb