From: Alan Cox <alan@linux.intel.com>
Date: Tue, 30 Aug 2016 20:08:38 +0000 (+0100)
Subject: v68: load the uarea shadow when needed
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=e5165f2db15287021aaff34fca95a8d4cdb9a884;p=FUZIX.git

v68: load the uarea shadow when needed
---

diff --git a/Kernel/platform-v68/p68000.S b/Kernel/platform-v68/p68000.S
index 87b52f3e..88a06cd3 100644
--- a/Kernel/platform-v68/p68000.S
+++ b/Kernel/platform-v68/p68000.S
@@ -18,6 +18,7 @@ trap_monitor:
 
 init_early:
 	    lea.l uarea_block,a5	; udata ptr
+	    move.l a5,uarea_shadow	; shadow copy for entry/exit
             rts
 
 ;
@@ -62,13 +63,18 @@ trapset:
 	    move.l #spurious,$60(a0)
 	    move.l #timer_irq,$78(a0)
 	    move.l #mmu_fault,$7C(a0)
+
+	    moveq #100,d0			; Timer on (but slow)
+	    move.b d0,$00F04000
             rts
 
 timer_irq:
 	    movem.l a0-a6/d0-d7,-(a7)
 	    move.l #intmsg,a0
 	    bsr outstring
+	    move.l uarea_shadow,a5	; set up the register global
 	    bsr platform_interrupt
+	    move.b $00F04000,d0		; Re-enable
 	    movem.l (a7)+,a0-a6/d0-d7
 	    rte