ARM926ej s context save and restore, Trying to power off arm after saving context and restoring it back.
- From: Deva <r.devaraj@xxxxxxxxx>
- Date: Thu, 30 Aug 2007 17:00:50 -0000
Hi,
In ARM926EJ-S,
step1 - save arm context (registers, CP15 register set, banked
registers) to external memory
step2 - power down (on WFI - MPU ss is powered down)
step3 - power on and start restoring the context so to continue from
where you entered step1.
in step3, while restoring CP15 context,
coprocessor control register is configured last.
(after restoring TTBR, and all other settings).
But as and when MMU bit is enabled at C1 register, memory accesses
were corrupted..
How this can be avoided?
Apart from blind restore of copied value of coprocessor control
register (restoring all fields at a time), is some other sequence
required??
Thanks for the help.
-Deva
.
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