Boot up & soft reboot Problems enabling & disabling MMU Discontiguous Memory

[Ricardo Martínez]

Hi all
 
We have an ARM926ej based custom board with 32MB of discontiguous DDRII RAM.
Memory MAP is 0 to 8M, 16 to 24M, 32 to 40M and 48 to 56Megabytes.
 
Everything works perfectly (Linux boot) but sometimes, when we soft reboot
(kernel_restart()) system hangs in two different places randomly:
-   Switching off MMU in cpu_arm926_reset() in proc-arm926.S
-   Switching ON MMU in head.S __turn_mmu_on.
 
Linux version is 2.6.18 (I know it is quite out-of-date, but can't upgrade
due to some annoying & not linux issues). I was wondering if someone has
experienced this problems and mainly if this can be caused because of
DISCONTIGUOUS memory map.
 
Thanks in advance
Ricardo

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