On Thu, Dec 1, 2011 at 9:52 PM, Ching-Tsun Chou <[email protected]>wrote:
> What does the "internal" in Context::store_internal and Context::loadphys > mean? > > These internal memory access functions are used to update CPU Context registers like segment register or some MSR registers. The address generated for such registers doesn't need to translate so their access functions are separate. - Avadh > Thanks in advance! > - Ching Tsun > > On Tue, Nov 29, 2011 at 4:21 PM, avadh patel <[email protected]> wrote: > >> Following are couple of functions used for reading/writing: >> >> - Context::loadvirt - Load max 64bit data from given virtual address >> - Context::loadphys - Load max 64bit data from given physical address >> - Context::storemask_virt - Store max 64bit data to given virtual address >> and it uses mask to write selected bytes >> - Context::copy_from_user - Load instructions from given virtual address >> (only used for instructions) >> >> All VM's memory is handled by QEMU and simulator uses QEMU's API's to >> read/write to VM's RAM, IO and MMIO. >> >> - Avadh >> >> >> On Tue, Nov 29, 2011 at 4:03 PM, DRAM Ninjas <[email protected]>wrote: >> >>> It reads QEMU's memory. I believe it doesn't write to QEMU's memory >>> since QEMU will do that on its own. >>> >>> As far as reading the memory, I think it uses Context::copy_from_user() >>> in ptlsim/sim/ptl-qemu.cpp:662 >>> >>> On Tue, Nov 29, 2011 at 5:54 PM, Ching-Tsun Chou < >>> [email protected]> wrote: >>> >>>> Does the PTLsim part of MARSS have its own memory (i.e., RAM), or it >>>> uses QEMU's memory? >>>> >>>> Where is the PTLsim code that actually reads and writes that memory? >>>> >>>> Thanks in advance! >>>> - Ching Tsun >>>> >>>> >>>> _______________________________________________ >>>> http://www.marss86.org >>>> Marss86-Devel mailing list >>>> [email protected] >>>> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >>>> >>>> >>> >>> _______________________________________________ >>> http://www.marss86.org >>> Marss86-Devel mailing list >>> [email protected] >>> https://www.cs.binghamton.edu/mailman/listinfo/marss86-devel >>> >>> >> >
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