[src/trunk]: src/sys/arch/sparc64/include Use TSO memory model for 32-bit use...

[eeh <eeh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/70ce7e96e558
branches:  trunk
changeset: 494637:70ce7e96e558
user:      eeh <eeh%NetBSD.org@localhost>
date:      Sun Jul 09 22:02:32 2000 +0000

description:
Use TSO memory model for 32-bit userland.

diffstat:

 sys/arch/sparc64/include/psl.h |  22 ++++++++++++++++------
 1 files changed, 16 insertions(+), 6 deletions(-)

diffs (54 lines):

diff -r 2c9a94ec905a -r 70ce7e96e558 sys/arch/sparc64/include/psl.h
--- a/sys/arch/sparc64/include/psl.h    Sun Jul 09 21:58:43 2000 +0000
+++ b/sys/arch/sparc64/include/psl.h    Sun Jul 09 22:02:32 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: psl.h,v 1.11 1999/08/05 18:28:01 thorpej Exp $ */
+/*     $NetBSD: psl.h,v 1.12 2000/07/09 22:02:32 eeh Exp $ */
 
 /*
  * Copyright (c) 1992, 1993
@@ -136,20 +136,31 @@
 
 #define        PSTATE_BITS "\20\14IG\13MG\12CLE\11TLE\10\7MM\6RED\5PEF\4AM\3PRIV\2IE\1AG"
 
+
+/*
+ * 32-bit code requires TSO or at best PSO since that's what's supported on
+ * SPARC V8 and earlier machines.
+ *
+ * 64-bit code sets the memory model in the ELF header.
+ *
+ * We're running kernel code in TSO for the moment so we don't need to worry
+ * about possible memory barrier bugs.
+ */
+
 #ifdef __arch64__
 #define PSTATE_PROM    (PSTATE_MM_TSO|PSTATE_PRIV)
 #define PSTATE_NUCLEUS (PSTATE_MM_TSO|PSTATE_PRIV|PSTATE_AG)
 #define PSTATE_KERN    (PSTATE_MM_TSO|PSTATE_PRIV)
 #define PSTATE_INTR    (PSTATE_KERN|PSTATE_IE)
-#define PSTATE_USER32  (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE)     /* It's easier to debug */
+#define PSTATE_USER32  (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE)
 #define PSTATE_USER    (PSTATE_MM_RMO|PSTATE_AM|PSTATE_IE)
 #else
 #define PSTATE_PROM    (PSTATE_MM_TSO|PSTATE_PRIV)
 #define PSTATE_NUCLEUS (PSTATE_MM_TSO|PSTATE_AM|PSTATE_PRIV|PSTATE_AG)
 #define PSTATE_KERN    (PSTATE_MM_TSO|PSTATE_AM|PSTATE_PRIV)
 #define PSTATE_INTR    (PSTATE_KERN|PSTATE_IE)
-#define PSTATE_USER32  (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE)     /* It's easier to debug */
-#define PSTATE_USER    (PSTATE_MM_RMO|PSTATE_AM|PSTATE_IE)
+#define PSTATE_USER32  (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE)
+#define PSTATE_USER    (PSTATE_MM_TSO|PSTATE_AM|PSTATE_IE)
 #endif
 
 /*
@@ -159,8 +170,7 @@
  *  +-----+-----+-----+--------+---+-----+
  *  | CCR | ASI |  -  | PSTATE | - | CWP |
  *  +-----+-----+-----+--------+---+-----+
- *
- */
+ * */
 
 #define TSTATE_CWP             0x01f
 #define TSTATE_PSTATE          0x6ff00