ppc4xx: Fix dflush() to restore DVLIM register

Signed-off-by: Larry Johnson <lrj@acm.org>

diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index a730604367d3d94635ad5d34b8dbb8ae9d1937e5..77c2aa4117845b479878ba327825bb19143122c4 100644 (file)
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -1700,6 +1700,7 @@ trap_reloc:
        rlwinm  r8,r9,0,15,13
        rlwinm  r8,r8,0,17,15
        mtmsr   r8
+       mfspr   r8,dvlim
        addi    r3,r0,0x0000
        mtspr   dvlim,r3
        mfspr   r3,ivpr
@@ -1714,6 +1715,7 @@ trap_reloc:
 ..ag:  dcbf    r0,r3
        addi    r3,r3,-32
        bdnz    ..ag
+       mtspr   dvlim,r8
        sync
        mtmsr   r9
        blr