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Subversion Repositories
HelenOS
(root)
/
tags
/
0.2.0
/
kernel
/
arch
/
sparc64
/
include
/
mm
/
mmu.h
– Rev 1968
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1968
6513 d 7 h
jermar
/tags/
Canonize pre-0.2.0.3 tags: remove inner branches, tags and trunk directories.
The change now should reflect how those releases looked like after checkout.
1964
6513 d 7 h
jermar
/tags/0.2.0/
Tagging release 0.2.0
758
6781 d 6 h
jermar
/kernel/trunk/arch/
sparc64 bugfix.
When disabling IMMU and DMMU the kernel has to perform synchronization operation
(e.g flush %r or membar #Sync instruction). There is no guarantee that the address
contained in %r is in DTLB and therefore the flush instruction can fault. Normally
this would be recognized and fixed by the OpenFirmware Fast Data MMU fault handler.
However, this handler lives in virtually mapped memory and an attempt to execute
there while the MMUs are disabled would result in a nested trap leading to error state.
Replacing flush %r instruction with membar #Sync, wich is sufficient in this case,
fixes this problem.
658
6822 d 18 h
jermar
/kernel/trunk/arch/sparc64/include/
sparc64 work.
Add functions to read and write TICK and TICK_compare registers.
Add types describing TICK and TICK_compare registers.
619
6831 d 3 h
jermar
/kernel/trunk/arch/sparc64/
sparc64 work.
Functions for disabling/enabling MMU.
TLB initialization.
Identity mapping of first 4M for kernel.
Switch to kernel copy of trap table.