HelenOS-historic – /kernel/trunk/arch/sparc64/include/mm/mmu.h

Rev 758 – sparc64 bugfix. When disabling IMMU and DMMU the kernel has ...

jermar — Thu, 02 Feb 2006 00:06:10 +0100

jermar – 4 file(s) modified
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.

~ /kernel/trunk/arch/ia64/src/mm/frame.c
~ /kernel/trunk/arch/sparc64/include/barrier.h
~ /kernel/trunk/arch/sparc64/include/mm/mmu.h
~ /kernel/trunk/arch/sparc64/include/mm/page.h

Rev 658 – sparc64 work. Add functions to read and write TICK and ...

jermar — Thu, 22 Dec 2005 12:09:02 +0100

jermar – 4 file(s) modified
sparc64 work.
Add functions to read and write TICK and TICK_compare registers.
Add types describing TICK and TICK_compare registers.

~ /kernel/trunk/arch/sparc64/include/asm.h
~ /kernel/trunk/arch/sparc64/include/mm/mmu.h
~ /kernel/trunk/arch/sparc64/include/mm/tlb.h
~ /kernel/trunk/arch/sparc64/include/register.h

Rev 619 – sparc64 work. Functions for disabling/enabling MMU. TLB initialization. Identity mapping ...

jermar — Wed, 14 Dec 2005 02:52:19 +0100

jermar – 8 file(s) modified
sparc64 work.
Functions for disabling/enabling MMU.
TLB initialization.
Identity mapping of first 4M for kernel.
Switch to kernel copy of trap table.

~ /kernel/trunk/arch/sparc64/include/mm/frame.h
+ /kernel/trunk/arch/sparc64/include/mm/mmu.h
~ /kernel/trunk/arch/sparc64/include/mm/tlb.h
+ /kernel/trunk/arch/sparc64/include/trap.h
~ /kernel/trunk/arch/sparc64/Makefile.inc
~ /kernel/trunk/arch/sparc64/src/mm/tlb.c
~ /kernel/trunk/arch/sparc64/src/sparc64.c
+ /kernel/trunk/arch/sparc64/src/trap.c