[yocto] Unable to get serial console login prompt - PowerPC 440 Virtex 5 processor

[Elvis Dowson]

Hi Khem,

On Aug 13, 2012, at 9:01 PM, Khem Raj wrote:

>> Success, at last!! :-) I switch to eglib 2.13, and everything works fine!!
>> The problem was with eglibc 2.16. It is broken for powerpc 440 soft float,
>> not sure if the same situation manifests for other target architectures as
>> well.
> 
> OK good. Now we should find what broke eglibc. Did you try 2.15 as
> well ? Want to make sure how far back it goes.

I tried with eglibc-2.15 and it's broken for PowerPC 440 soft-float.

zImage starting: loaded at 0x00800000 (sp: 0x017e4fa0)                     
Allocating 0x54cf4c bytes for kernel ...                                   
gunzipping (0x00000000 <- 0x0080f000:0x00a1aee0)...done 0x42f600 bytes
Attached initrd image at 0x00a1b000-0x017e33c3
initrd head: 0x1f8b0808

Linux/PowerPC load: console=ttyS0,9600n8 ip=off root=/dev/ram rw rootwait init=/bin/sh
Finalizing device tree... flat tree at 0x17f10e0
 PM: Adding info for No Bus:ttyv9
[    0.582882] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
[    0.588508] 83e00000.serial: ttyS0 at MMIO 0x83e01003 (irq = 20) is a 16550
[    0.784008] console [ttyS0] enabled
[    0.829401] brd: module loaded
[    0.876027] loop: module loaded
[    0.913302] xsysace 83600000.sysace: Xilinx SystemACE revision 1.0.12
[    0.990015] xsysace 83600000.sysace: No CF in slot
[    1.049035] Xilinx SystemACE device driver, major=254
[    1.109979] xilinx_emaclite 81000000.ethernet: Device Tree Probing
[    1.183493] xilinx_emaclite 81000000.ethernet: error registering MDIO bus
[    1.264571] xilinx_emaclite 81000000.ethernet: MAC address is now 00:0a:35:b7:78:00
[    1.358238] xilinx_emaclite 81000000.ethernet: Xilinx EmacLite at 0x81000000 mapped to 0xD10A0000, irq=17
[    1.473224] xilinx_ps2 81480000.ps2: Device Tree Probing 'ps2'
[    1.542456] xilinx_ps2 81480000.ps2: Xilinx PS2 at 0x81480000 mapped to 0xd1036000, irq=22
[    1.641839] xilinx_ps2 81481000.ps2: Device Tree Probing 'ps2'
[    1.711543] xilinx_ps2 81481000.ps2: Xilinx PS2 at 0x81481000 mapped to 0xd1038000, irq=23
[    1.812133] mousedev: PS/2 mouse device common for all mice
[    1.879716] i2c /dev entries driver
[    1.921305] Device Tree Probing 'i2c'
[    1.965584] xilinx-iic #0 at 0x81600000 mapped to 0xD10C0000, irq=18
[    2.043255] TCP cubic registered
[    2.081065] NET: Registered protocol family 17
[    2.875069] atkbd serio0: keyboard reset failed on xilinxps2/serio at 81480000
[    3.359365] RAMDISK: gzip image found at block 0
[    3.883298] input: AT Raw Set 2 keyboard as /devices/plb.0/xps-ps2.1/81481000.ps2/serio1/input/input0
[    6.351431] EXT2-fs (ram0): warning: mounting unchecked fs, running e2fsck is recommended
[    6.448811] VFS: Mounted root (ext2 filesystem) on device 1:0.
[    6.519375] Freeing unused kernel memory: 160k freed


I get no login prompt. Therefore, both eglibc-2.15 and 2.16 are broken for PowerPC. 

At the moment, only eglibc-2.13 works. 

Has anyone else reported issues with getting a boot or login prompt for other 
architectures, like ARM Cortex-A8, etc?

How do you plan on isolating the cause for this issue, for eglibc-2.15?

Best regards,

Elvis Dowson
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