Mikhail Zaturenskiy wrote: > Hi guys, I've been working off your suggestions and here's my update > on where I'm at now. > > For reference, attached are my current > "linux-2.6-denx/arch/powerpc/boot/dts/ep88xc.dts" and > "u-boot-2009.03/include/configs/EP88x.h". > >> I might be able to help out. Scott's right. According to U-Boots >> include/configs/EP88x.h, >> CONFIG_SYS_IMMR is 0xf0000000, but the Linux the ep88xc.dts is >> referring to an IMMR set >> to 0xfa200000. Replace every instance of 0xfa20 with 0xf000, and it may work. > I did notice the IMMR discrepancy and as Frank suggested adjusted the > 0xfa20xxxx values to 0xf000xxxx in my DTS, though I'm wondering if it > would be better to have just set my CONFIG_SYS_IMMR to 0xfa200000? Not > sure if that would break more than it would fix. Anyways, I have not > noticed any difference in output after changing this in the DTS, but > I'll leave it this way as it seems more correct. > >>>> Also, make sure u-boot is properly updating the memory size in the device >>>> tree. Can you dump the post-fixup device tree in u-boot? >>> Not sure, but I'll try to find out if that's possible. It'd certainly >>> answer a lot of questions... > While I have not yet figured out how to dump the post-fixup tree... I > can see that U-Boot doesn't seem to be doing proper fixup because > after manually setting all the DTS fields that U-Boot was supposed to > fill in (clock frequency, RAM start/end, etc.), the kernel seems to be > going through a fairly normal boot sequence. Without me manually > setting those fields, they remain initialized to 0. The only issue is > that no output goes to the console. > > Here is my current output. >>From U-Boot: > > U-Boot 2009.03-svn8591 (Jun 29 2009 - 11:25:23) > > CPU: MPC885ZPnn at 100 MHz [40.0...133.0 MHz] > 8 kB I-Cache 8 kB D-Cache FEC present > Board: EP88xC 1.1 CPLD revision 2 > DRAM: 64 MB > FLASH: 32 MB > In: serial > Out: serial > Err: serial > Net: FEC ETHERNET, FEC2 ETHERNET > Hit any key to stop autoboot: 0 > => tftp ep88x_uimage2 > Using FEC ETHERNET device > TFTP from server 10.0.54.129; our IP address is 10.0.54.150 > Filename 'ep88x_uimage2'. > Load address: 0x400000 > Loading: ################################################################# > ######## > done > Bytes transferred = 1057419 (10228b hex) > => tftp 750000 ep88x_dtb2 > Using FEC ETHERNET device > TFTP from server 10.0.54.129; our IP address is 10.0.54.150 > Filename 'ep88x_dtb2'. > Load address: 0x750000 > Loading: # > done > Bytes transferred = 7725 (1e2d hex) > => bootm 400000 - 750000 > ## Booting kernel from Legacy Image at 00400000 ... > Image Name: Linux-2.6.30-rc2-01402-gd4e2f68- > Image Type: PowerPC Linux Kernel Image (gzip compressed) > Data Size: 1057355 Bytes = 1 MB > Load Address: 00000000 > Entry Point: 00000000 > Verifying Checksum ... OK > ## Flattened Device Tree blob at 00750000 > Booting using the fdt blob at 0x750000 > Uncompressing Kernel Image ... OK > > >>From Kernel via postmortem analysis - sorry it's a little messy, my > debugger ICDPPCZ is not that great at producing memory dumps so I had > to do some cleanup/conversion to make the results at least somewhat > legible: > > <6>Using Embedded Planet EP88xC machine description? > <5>Linux version 2.6.30-rc2-??1402-gd4e2f68-dirty > (dev...@localhost.localdomain) (gcc version 4.2.2) #1 Mon J??n 29 > 11:35:28 CDT 2009? > <7>Top of RAM: 0x4000000' Total RAM: 0x4000000? > <7>Memory??hole size: 0MB? > <4>Zone PFN ranges:? > <4> DMA 0x00000000 -> 0x00004000? > <4> ??ormal 0x00004000 -> 0x00004000? > <4>Movable zone start PFN for each node? > <4>ear??y_node_map[1] active PFN ranges? > <4> 0: 0x00000000 -> 0x00004000? > <7>On node 0??totalpages: 16384? > <7>free_area_init_node: node 0' pgdat c021bf7c' node_mem_map ??023f000? > <7> DMA zone: 128 pages used for memmap? > <7> DMA zone: 0 pages reserve??? > <7> DMA zone: 16256 pages' LIFO batch:3? > <6>MMU: Allocated 72 bytes of context??maps for 16 contexts? > <4>Built 1 zonelists in Zone order' mobility grouping on. ??Total pages: > 16256? > <5>Kernel command line: console=ttyS0'9600n8 loglevel=7? > <6>N??_IRQS:512? > <7>irq: irq 5 on host /s...@f0000000/interrupt-control...@0 mapped to > ??irtual irq 16? > <7>irq: irq 0 on host /s...@f0000000/c...@9c0/interrupt-control...@??30 > mapped to virtual irq 17? > <4>PID hash table entries: 256 (order: 8' 1024 byte??)? > <4>Decrementer Frequency = 0x7bfa48? > <7>irq: irq 15 on host /s...@f0000000/inte??rupt-control...@0 mapped to > virtual irq 18? > <7>time_init: decrementer frequency ?? 8.125000 MHz? > <7>time_init: processor frequency = 130.000000 MHz? > <6>clocksour??e: timebase mult[1ec4ec4f] shift[22] registered? > <7>clockevent: decrementer mult??214] shift[16] cpu[0]? > <6>Dentry cache hash table entries: 8192 (order: 3' 32768??bytes)? > <6>Inode-cache hash table entries: 4096 (order: 2' 16384 bytes)? > <6>Memor??: 62532k/65536k available (2064k kernel code' 2940k > reserved' 100k data' 99k bs??' 96k init)? > <6>SLUB: Genslabs=12' HWalign=16' Order=0-3' MinObjects=0' CPUs=1' ??odes=1? > <6>Calibrating delay loop... 16.12 BogoMIPS (lpj=80640)? > <4>Mount-cache h??sh table entries: 512? > <6>net_namespace: 296 bytes? > <6>NET: Registered protocol f??mily 16? > <4>bio: create slab <bio-0> at 0? > <7>Switched to high resolution mode on??CPU 0? > <6>NET: Registered protocol family 2? > <6>IP route cache hash table entries?? 1024 (order: 0' 4096 bytes)? > <6>TCP established hash table entries: 2048 (order?? 2' 16384 bytes)? > <6>TCP bind hash table entries: 2048 (order: 1' 8192 bytes)? > <6??TCP: Hash tables configured (established 2048 bind 2048)? > <6>TCP reno registered?? > <6>NET: Registered protocol family 1? > <6>msgmni has been set to 122? > <6>io schedu??er noop registered? > <6>io scheduler deadline registered (default)? > <6>Generic RTC??Driver v1.07? > <7>irq: irq 4 on host /s...@f0000000/c...@9c0/interrupt-control...@9??0 > mapped to virtual irq 19? > <6>f0000a80.serial: ttyCPM0 at MMIO 0xc500ea80 (irq ?? 19) is a CPM UART? > <7>irq: irq 29 on host /s...@f0000000/c...@9c0/interrupt-contr??l...@930 > mapped to virtual irq 29? > <6>f0000a20.serial: ttyCPM1 at MMIO 0xc501aa2?? (irq = 29) is a CPM UART? > <7>irq: irq 3 on host /s...@f0000000/interrupt-control?...@0 mapped to > virtual irq 20? > <6>eth0: fs_enet: 00:00:00:00:00:00? > <7>irq: irq 7??on host /s...@f0000000/interrupt-control...@0 mapped to > virtual irq 21? > <6>eth1: ??s_enet: 00:00:00:00:00:00? > <6>FEC MII Bus: probed? > <6>fe000000.flash: Found 2 x16??devices at 0x0 in 32-bit bank? > <4> Amd/Fujitsu Extended Query Table at 0x0040? > <4??fe000000.flash: CFI does not contain boot bank location. Assuming top.? > <5>numbe?? of CFI chips: 1? > <5>cfi_cmdset_0002: Disabling erase-suspend-program due to cod?? brokenness.? > <6>TCP cubic registered? > <6>NET: Registered protocol family 17? > <6>R??C: Registered udp transport module.? > <6>RPC: Registered tcp transport module.? > <3??Root-NFS: No NFS server available' giving up.? > <3>VFS: Unable to mount root fs v??a NFS' trying floppy.? > <4>VFS: Cannot open root device "<NULL>" or unknown-block??2'0)? > <4>Please append a correct "root=" boot option; here are the available > par??itions:? > <4>1f00 32768 mtdblock0 driver: of-flash? > <0>Kernel panic - no?? syncing: VFS: Unable to mount root fs on > unknown-block(2'0)? > <4>Call Trace:? > <4>??c381fed0] [c00069e0] show_stack+0x44/0x16c (unreliable)? > <4>[c381ff10] [c001bc6c?? panic+0x8c/0x168? > <4>[c381ff60] [c01ecb80] mount_block_root+0x12c/0x244? > <4>[c38??ffb0] [c01ecdf4] prepare_namespace+0x4c/0x1c4? > <4>[c381ffd0] [c01ec1b0] kernel_i??it+0xd0/0xfc? > <4>[c381fff0] [c000da60] kernel_thread+0x4c/0x68? > <0>Rebooting in 1??0 seconds..????????????????????????????????? > > At this point, my primary goal is to get console output working before > I do anything else. I've tried different "console=x" boot arguments > and I've added the "chosen" section to my DTS, but still no output. > Anyone have suggestions about this? Is something else messed up in my > DTS?
Did you try 'root=ttyCPM0,9600'? -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------ _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
