[src/netbsd-1-4]: src/sys/arch/macppc/macppc Pull up revision 1.19 (requested...

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

details:   https://anonhg.NetBSD.org/src/rev/22bdd3ce2636
branches:  netbsd-1-4
changeset: 470106:22bdd3ce2636
user:      he <he%NetBSD.org@localhost>
date:      Thu Jan 20 21:23:57 2000 +0000

description:
Pull up revision 1.19 (requested by danw):
  Add (the beginnings of) an unaligned access handler for the
  powerpc, to get around the fact that gcc currently generates bad
  floating point copies sometimes, which breaks various things,

diffstat:

 sys/arch/macppc/macppc/locore.S |  29 ++++++++++++++++++++++++++---
 1 files changed, 26 insertions(+), 3 deletions(-)

diffs (50 lines):

diff -r d4bcb073b4ba -r 22bdd3ce2636 sys/arch/macppc/macppc/locore.S
--- a/sys/arch/macppc/macppc/locore.S   Thu Jan 20 21:22:51 2000 +0000
+++ b/sys/arch/macppc/macppc/locore.S   Thu Jan 20 21:23:57 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: locore.S,v 1.13 1999/03/25 00:41:47 mrg Exp $  */
+/*     $NetBSD: locore.S,v 1.13.2.1 2000/01/20 21:23:57 he Exp $       */
 
 /*
  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -508,8 +508,8 @@
 
 /*
  * This code gets copied to all the trap vectors
- * (except ISI/DSI, the interrupts, and possibly the debugging traps when
- * using IPKDB).
+ * (except ISI/DSI, ALI, the interrupts, and possibly the debugging 
+ * traps when using IPKDB).
  */
        .text
        .globl  _C_LABEL(trapcode),_C_LABEL(trapsize)
@@ -530,6 +530,29 @@
 _C_LABEL(trapsize) = .-_C_LABEL(trapcode)
 
 /*
+ * For ALI: has to save DSISR and DAR
+ */
+       .globl  _C_LABEL(alitrap),_C_LABEL(alisize)
+_C_LABEL(alitrap):
+       mtsprg  1,1                     /* save SP */
+       stmw    28,tempsave(0)          /* free r28-r31 */
+       mfdar   30
+       mfdsisr 31
+       stmw    30,tempsave+16(0)
+       mflr    28                      /* save LR */
+       mfcr    29                      /* save CR */
+/* Test whether we already had PR set */
+       mfsrr1  31
+       mtcr    31
+       bc      4,17,1f                 /* branch if PSL_PR is clear */
+       lis     1,_C_LABEL(curpcb)@ha
+       lwz     1,_C_LABEL(curpcb)@l(1)
+       addi    1,1,USPACE              /* stack is top of user struct */
+1:
+       bla     s_trap
+_C_LABEL(alisize) = .-_C_LABEL(alitrap)
+
+/*
  * Similar to the above for DSI
  * Has to handle BAT spills
  * and standard pagetable spills