[U-Boot] Problem booting CRAMFS with flattened device tree

[hendrik <hendrik.vastech@gmail.com>]

Greetings  all,

I have been able to port to U-boot 2009 successfully and am able to boot 
Linux 2.6.27 via NFS using a flattened device tree. I am now stuck 
trying to boot a CRAMFS version from flash (AMD nor). I found that 
U-boot1.2 used a MTD map that is compiled for the board. Is this still 
the way to mount and map the flash in U-Boot 2009?

I have defined the flash partitions in the device tree source, but it 
does not seem to get used. am I missing a step or a config setting?

Even though Im trying to boot CRAMFS, the console output keeps refering 
to NFS as mounting point.
my  Kernel command line is:
    root=/dev/mtdblock0 ro console=ttyS0,115200
 
In the console output i dont see ant CFI interaction. I have been throug 
my board's default_config basing it closely on tqm8548_defconfig but 
coulf not get the CFI interface to work.

a would appreciate any help,
thanks Hendrik van der Kolf

My console output is:

U-Boot 2009.01-00226-g6c6e042-dirty-svn1216 (Feb 10 2009 - 15:36:40)

CPU:   8548E, Version: 1.1, (0x80390011)
Core:  E500, Version: 1.0, (0x80210010)
Clock Configuration:
       CPU0:990  MHz, CCB:396  MHz,
       DDR:198  MHz (396 MT/s data rate), LBC:49.500 MHz
L1:    D-cache 32 kB enabled
       I-cache 32 kB enabled
Board: qps8548 MPC8548
    PCI1: 64 bit, 66 MHz, sync
I2C:   ready
DRAM:  Initializing
    DDR: 512 MB
FLASH: 128 MB
L2:    512 KB already enabled
*** Warning - bad CRC, using default environment
PCI: 64 bit, 66 MHz, sync, host, arbiter
               Scanning PCI bus 00
PCI1 on bus 00 - 00
In:    serial
Out:   serial
Err:   serial
Net:   eTSEC0, eTSEC1, eTSEC2

partition changed to nor0,0
Speed: 100, full duplex
Using eTSEC0 device
TFTP from server 10.0.0.1; our IP address is 10.0.0.200
Filename 'test.dtb'.
Load address: 0x2000000
Loading: #
done
Bytes transferred = 9551 (254f hex)
### CRAMFS loading '/boot/uImage' to 0x1000000
### CRAMFS load complete: 1515729 bytes loaded to 0x1000000
WARNING: adjusting available memory to 10000000
## Booting kernel from Legacy Image at 01000000 ...
   Image Name:   Linux-2.6.27-01163-g809d437-dirt
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1515665 Bytes =  1.4 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
## Flattened Device Tree blob at 02000000
   Booting using the fdt blob at 0x2000000
   Uncompressing Kernel Image ... OK
   Loading Device Tree to 007fa000, end 007ff54e ... OK

[    0.000000] Using qps8548 machine description
[    0.000000] Memory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb 
residual: 0Mb
[    0.000000] Linux version 2.6.27-01163-g809d437-dirty (root at sdh-ts2) 
(gcc version 4.2.2) #1
Tue Feb 10 15:42:11 SAST 2009
[    0.000000] Found legacy serial port 0 for /soc8548 at e0000000/serial at 4500
[    0.000000]   mem=e0004500, taddr=e0004500, irq=0, clk=396000000, 
speed=115200
[    0.000000] Found legacy serial port 1 for /soc8548 at e0000000/serial at 4600
[    0.000000]   mem=e0004600, taddr=e0004600, irq=0, clk=396000000, 
speed=115200
[    0.000000] console [udbg0] enabled
setup_arch: bootmem
qps8548_setup_arch()
arch: exit
[    0.000000] Top of RAM: 0x20000000, Total RAM: 0x20000000
[    0.000000] Memory hole size: 0MB
[    0.000000] Zone PFN ranges:
[    0.000000]   DMA      0x00000000 -> 0x00020000
[    0.000000]   Normal   0x00020000 -> 0x00020000
[    0.000000]   HighMem  0x00020000 -> 0x00020000
[    0.000000] Movable zone start PFN for each node
[    0.000000] early_node_map[1] active PFN ranges
[    0.000000]     0: 0x00000000 -> 0x00020000
[    0.000000] On node 0 totalpages: 131072
[    0.000000] free_area_init_node: node 0, pgdat c0338f2c, node_mem_map 
c0390000
[    0.000000]   DMA zone: 130048 pages, LIFO batch:31
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  
Total pages: 130048
[    0.000000] Kernel command line: root=/dev/mtdblock0 ro 
console=ttyS0,115200
[    0.000000] mpic: Setting up MPIC " OpenPIC  " version 1.2 at 
e0040000, max 1 CPUs
[    0.000000] mpic: ISU size: 80, shift: 7, mask: 7f
[    0.000000] mpic: Initializing for 80 sources
[    0.000000] PID hash table entries: 2048 (order: 11, 8192 bytes)
[    0.000000] time_init: decrementer frequency = 49.500000 MHz
[    0.000000] time_init: processor frequency   = 990.000000 MHz
[    0.000000] clocksource: timebase mult[50cede6] shift[22] registered
[    0.000000] clockevent: decrementer mult[cac] shift[16] cpu[0]
[    0.012180] Console: colour dummy device 80x25
[    0.017138] Dentry cache hash table entries: 65536 (order: 6, 262144 
bytes)
[    0.024979] Inode-cache hash table entries: 32768 (order: 5, 131072 
bytes)
[    0.067828] High memory: 0k
[    0.070447] Memory: 515968k/524288k available (3188k kernel code, 
8196k reserved, 120k data,
 299k bss, 160k init)
[    0.080744] SLUB: Genslabs=12, HWalign=32, Order=0-3, MinObjects=0, 
CPUs=1, Nodes=1
[    0.088262] Calibrating delay loop... 98.81 BogoMIPS (lpj=49408)
[    0.113198] Mount-cache hash table entries: 512
[    0.119930] net_namespace: 288 bytes
[    0.124468] NET: Registered protocol family 16
            
[    0.134073] PCI: Probing PCI hardware
[    0.147819] Switched to high resolution mode on CPU 0
[    0.153707] tracer: 772 pages allocated for 65536 entries of 48 bytes
[    0.159981]    actual entries 65620
[    0.167572] NET: Registered protocol family 2
[    0.181069] IP route cache hash table entries: 16384 (order: 4, 65536 
bytes)
[    0.189644] TCP established hash table entries: 65536 (order: 7, 
524288 bytes)
[    0.198032] TCP bind hash table entries: 65536 (order: 6, 262144 bytes)
[    0.205394] TCP: Hash tables configured (established 65536 bind 65536)
[    0.211766] TCP reno registered
[    0.218091] NET: Registered protocol family 1
[    0.226106] of-fsl-dma e0021300.dma: Probe the Freescale DMA driver 
for fsl,eloplus-dma cont
roller at e0021300...
[    0.242882] of-fsl-dma-channel e0021100.dma-channe: #0 
(fsl,eloplus-dma-channel), irq 20
[    0.256880] of-fsl-dma-channel e0021180.dma-channe: #1 
(fsl,eloplus-dma-channel), irq 21
[    0.270880] of-fsl-dma-channel e0021200.dma-channe: #2 
(fsl,eloplus-dma-channel), irq 22
[    0.284882] of-fsl-dma-channel e0021280.dma-channe: #3 
(fsl,eloplus-dma-channel), irq 23
[    0.299174] audit: initializing netlink socket (disabled)
[    0.304512] type=2000 audit(0.241:1): initialized
[    0.309235] Testing tracer sched_switch: PASSED
[    0.425411] Testing tracer ftrace: PASSED
[    0.542691] Testing dynamic ftrace: PASSED
[    0.777926] JFFS2 version 2.2. (NAND) ? 2001-2006 Red Hat, Inc.
[    0.785281] msgmni has been set to 1007
[    0.789566] io scheduler noop registered
[    0.793335] io scheduler anticipatory registered
[    0.797918] io scheduler deadline registered
[    0.802212] io scheduler cfq registered (default)
[    1.042223] Serial: 8250/16550 driver4 ports, IRQ sharing enabled
[    1.051724] serial8250.0: ttyS0 at MMIO 0xe0004500 (irq = 42) is a 16550A
                                                                            
[    1.058386] cons
ole handover: boot [udbg0] -> real [ttyS0]
[    1.065142] serial8250.0: ttyS1 at MMIO 0xe0004600 (irq = 42) is a 16550A
[    1.080974] brd: module loaded
[    1.088121] loop: module loaded
[    1.097505] Gianfar MII Bus: probed
[    1.102306] eth0: Gianfar Ethernet Controller Version 1.2, 
00:50:c2:52:50:fc
[    1.109393] eth0: Running with NAPI enabled
[    1.113589] eth0: 256/256 RX/TX BD ring size
[    1.119004] eth1: Gianfar Ethernet Controller Version 1.2, 
00:50:c2:52:50:fd
[    1.126105] eth1: Running with NAPI enabled
[    1.130305] eth1: 256/256 RX/TX BD ring size
[    1.135764] eth2: Gianfar Ethernet Controller Version 1.2, 
00:50:c2:52:50:fe
[    1.142867] eth2: Running with NAPI enabled
[    1.147077] eth2: 256/256 RX/TX BD ring size
[    1.154504] Initializing XFRM netlink socket
[    1.158840] NET: Registered protocol family 17
[    1.164038] RPC: Registered udp transport module.
[    1.168799] RPC: Registered tcp transport module.
[    1.175097] Root-NFS: No NFS server available, giving up.
[    1.180586] VFS: Unable to mount root fs via NFS, trying floppy.
[    1.187149] VFS: Cannot open root device "mtdblock0" or 
unknown-block(2,0)
[    1.194076] Please append a correct "root=" boot option; here are the 
available partitions:
[    1.202491] Kernel panic - not syncing: VFS: Unable to mount root fs 
on unknown-block(2,0)
[    1.210790] Rebooting in 180 seconds..