Hi,
thanks for your response.
Sylvain Joyeau wrote:
Residual memory size is what Linux couldn't map with its three CAM
entries. The main figure you can check is the sum of the three first
CAMs plus residual is what you specified (CAM0+CAM1+CAM2+residuak ==
'mem'). It's not weird to get a residual != 0 when specified memory
size isn't a good combination of power of 2.
Again I tried mem=508M together with initrd_high @ 10000000. This time
the kernel booted.
Shown mapping is: CAM0=256Mb, CAM1=64Mb, CAM2=64Mb residual: 124Mb,
which is == 'mem'.
Available system memory is only 384 MB (CAM0+CAM1+CAM2), which explains
why Linux "removed" the ramdisk, when it has been copied right below
508M by U-Boot. Because at that time I was using initrd_high @ 1FC00000,
which is outside of mapped RAM.
Is there an option to map less than 64M by a CAM entry?
Stupid question: have you tried mem=512M and a correct RAM disk address ?
No more comments...
I just did that (I don't get what you wanted to achieve with these
settings, since this the default):
=> setenv bootargs console=ttyS0,115200 mem=512M
=> setenv initrd_high 20000000
=> bootm 0x02100000
## Booting image at 02100000 ...
Image Name: Linux 2.6.15
Image Type: PowerPC Linux Multi-File Image (gzip compressed)
Data Size: 6965022 Bytes = 6.6 MB
Load Address: 00000000
Entry Point: 00000000
Contents:
Image 0: 1099550 Bytes = 1 MB
Image 1: 5865458 Bytes = 5.6 MB
Verifying Checksum ... OK
Uncompressing Multi-File Image ... OK
## Current stack ends at 0x1FFAECB8 => set upper limit to 0x00800000
[...]
## initrd at 0x0220C76C ... 0x027A475D (len=5865458=0x597FF2)
Loading Ramdisk to 1fa16000, end 1ffadff2 ... OK
## Transferring control to Linux (at address 00000000) ...
Memory CAM mapping: CAM0=256Mb, CAM1=256Mb, CAM2=0Mb residual: 0Mb
Linux version 2.6.15 ([EMAIL PROTECTED]) (gcc version 3.4.3) #21 PREEMPT Fri
Nov 30 16:47:32 CET 2007
[...]
Have a nice weekend,
Florian
_______________________________________________
Linuxppc-embedded mailing list
Linuxppc-embedded@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
