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authorChristophe Leroy <christophe.leroy@c-s.fr>2019-01-09 23:30:07 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2019-01-11 15:45:00 +0300
commitfb0bdec51a4901b7dd088de0a1e365e1b9f5cd21 (patch)
treeebf43fa694fbcf8e95b3a5b451ac672afb1dc0b9 /arch
parentd7b6cc199b2dea602b4a2a681cf6d3223a61e2be (diff)
downloadlinux-fb0bdec51a4901b7dd088de0a1e365e1b9f5cd21.tar.xz
powerpc/8xx: fix setting of pagetable for Abatron BDI debug tool.
Commit 8c8c10b90d88 ("powerpc/8xx: fix handling of early NULL pointer dereference") moved the loading of r6 earlier in the code. As some functions are called inbetween, r6 needs to be loaded again with the address of swapper_pg_dir in order to set PTE pointers for the Abatron BDI. Fixes: 8c8c10b90d88 ("powerpc/8xx: fix handling of early NULL pointer dereference") Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kernel/head_8xx.S3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 57deb1e9ffea..20cc816b3508 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -852,11 +852,12 @@ start_here:
/* set up the PTE pointers for the Abatron bdiGDB.
*/
- tovirt(r6,r6)
lis r5, abatron_pteptrs@h
ori r5, r5, abatron_pteptrs@l
stw r5, 0xf0(0) /* Must match your Abatron config file */
tophys(r5,r5)
+ lis r6, swapper_pg_dir@h
+ ori r6, r6, swapper_pg_dir@l
stw r6, 0(r5)
/* Now turn on the MMU for real! */