Hi Rongrong,
The ones in exec_context.hh eventually calls the translation function
in arch/alpha/tlb.* which are used to simulate the system TLB. The
functions in vtophys.* are used for the simulator "back door access."
It's used to initially load files, and do other such translation. For
example the m5 utility application that is on the disk image is uses
a special opcode with a virtual address in a register to read the rcS
files off disk. A vtophys() call is then done on this address to turn
it into a physical address so the simulator can the rcS file into the
application space buffer.
Ali
On May 23, 2006, at 4:10 PM, lairongrong wrote:
Hi,
I found there are two sets of virtual ot physical address
translation in
M5.
One is defined in exec_context.hh :
translateInstReq(..),translateDataReadReq(..) and
translateDataWriteReq(..).
The other one is defined in vtophys.cc : vtophys(..) etc.
Does anyone know the functionality for each of them? What is the
major
difference between them?
Thanks!
Rongrong Lai
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