Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/sparc64/kernel/dtlb_prot.S b/arch/sparc64/kernel/dtlb_prot.S
new file mode 100644
index 0000000..d848bb7
--- /dev/null
+++ b/arch/sparc64/kernel/dtlb_prot.S
@@ -0,0 +1,54 @@
+/* $Id: dtlb_prot.S,v 1.22 2001/04/11 23:40:32 davem Exp $
+ * dtlb_prot.S: DTLB protection trap strategy.
+ * This is included directly into the trap table.
+ *
+ * Copyright (C) 1996,1998 David S. Miller (davem@redhat.com)
+ * Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+
+/* Ways we can get here:
+ *
+ * [TL == 0] 1) User stores to readonly pages.
+ * [TL == 0] 2) Nucleus stores to user readonly pages.
+ * [TL > 0] 3) Nucleus stores to user readonly stack frame.
+ */
+
+/* PROT ** ICACHE line 1: User DTLB protection trap */
+ stxa %g0, [%g1] ASI_DMMU ! Clear SFSR FaultValid bit
+ membar #Sync ! Synchronize ASI stores
+ rdpr %pstate, %g5 ! Move into alternate globals
+ wrpr %g5, PSTATE_AG|PSTATE_MG, %pstate
+ rdpr %tl, %g1 ! Need to do a winfixup?
+ cmp %g1, 1 ! Trap level >1?
+ mov TLB_TAG_ACCESS, %g4 ! Prepare reload of vaddr
+ nop
+
+/* PROT ** ICACHE line 2: More real fault processing */
+ bgu,pn %xcc, winfix_trampoline ! Yes, perform winfixup
+ ldxa [%g4] ASI_DMMU, %g5 ! Put tagaccess in %g5
+ ba,pt %xcc, sparc64_realfault_common ! Nope, normal fault
+ mov FAULT_CODE_DTLB | FAULT_CODE_WRITE, %g4
+ nop
+ nop
+ nop
+ nop
+
+/* PROT ** ICACHE line 3: Unused... */
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+
+/* PROT ** ICACHE line 4: Unused... */
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop
+ nop