Module Name: src
Committed By: palle
Date: Thu Jul 18 18:21:45 UTC 2019
Modified Files:
src/sys/arch/sparc64/sparc64: locore.s
Log Message:
sun4v: added some missing comments to the code in pcbspill
To generate a diff of this commit:
cvs rdiff -u -r1.420 -r1.421 src/sys/arch/sparc64/sparc64/locore.s
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/sparc64/sparc64/locore.s
diff -u src/sys/arch/sparc64/sparc64/locore.s:1.420 src/sys/arch/sparc64/sparc64/locore.s:1.421
--- src/sys/arch/sparc64/sparc64/locore.s:1.420 Sun Apr 7 19:31:38 2019
+++ src/sys/arch/sparc64/sparc64/locore.s Thu Jul 18 18:21:45 2019
@@ -1,4 +1,4 @@
-/* $NetBSD: locore.s,v 1.420 2019/04/07 19:31:38 mrg Exp $ */
+/* $NetBSD: locore.s,v 1.421 2019/07/18 18:21:45 palle Exp $ */
/*
* Copyright (c) 2006-2010 Matthew R. Green
@@ -3463,11 +3463,11 @@ pcbspill:
or %g7, %g6, %g6 ! Then combine them to form PA
wr %g0, ASI_PHYS_CACHED, %asi ! Use ASI_PHYS_CACHED to prevent possible page faults
-
- lduba [%g6 + PCB_NSAVED] %asi, %g7
- sllx %g7, 7, %g5
- add %g6, %g5, %g5
- SPILL stxa, %g5 + PCB_RW, 8, %asi
+
+ lduba [%g6 + PCB_NSAVED] %asi, %g7 ! Fetch current nsaved from the pcb
+ sllx %g7, 7, %g5 ! 8+8 registers each 8 bytes = 128 bytes (2^7)
+ add %g6, %g5, %g5 ! Offset into pcb_rw
+ SPILL stxa, %g5 + PCB_RW, 8, %asi ! Store the locals and ins
saved
sllx %g7, 3, %g5
@@ -5089,7 +5089,7 @@ rft_user:
* to exceede the maximum trap level on sun4v, so a manual fill
* may be necessary.
*/
-
+
#ifdef SUN4V
sethi %hi(cputyp), %g5
ld [%g5 + %lo(cputyp)], %g5
