# HG changeset patch
# User Jimi Xenidis <[EMAIL PROTECTED]>
# Node ID 28adc79fe774f9811e7f98f225327d777664be6a
# Parent c2f25eb27f246a16df21367fad993ee91732f680
[LINUX][XEN][POWERPC] Use Domain Foreign Map
This patch allows for the SLB logic to recognize the Domain Foreign
Map and insert SLBs for it. The base is currently hard-coded in but
the logic is disabled by default and only turned on when needed by
replacing a branch with a NOP.
Signed-off-by: Jimi Xenidis <[EMAIL PROTECTED]>
---
arch/powerpc/mm/slb_low.S | 17 +++++++++++++++++
1 files changed, 17 insertions(+)
diff -r c2f25eb27f24 -r 28adc79fe774 arch/powerpc/mm/slb_low.S
--- a/arch/powerpc/mm/slb_low.S Sat Oct 07 17:57:56 2006 -0400
+++ b/arch/powerpc/mm/slb_low.S Sun Oct 08 12:21:35 2006 -0400
@@ -52,6 +52,23 @@ _GLOBAL(slb_allocate_realmode)
*/
bne cr7,1f
+#ifdef CONFIG_PPC_XEN
+_GLOBAL(slb_miss_kernel_load_xen_nop)
+ b 3f
+ /* Need to check if it is in the part of our XEN Foreign Map */
+ rldicl r9,r3,30,63 /* get Xen region */
+ cmpldi cr7,r9,1 /* cmp this bit set to 1 */
+ bne cr7,3f
+ /* Xen Linear mapping encoding bits, the "li" instruction below
+ * could be patched below (like the other pages of the linear map)
+ * if we ever wish to map anything other that 4K pages in
+ * this region, right now it is fine as zero.
+ */
+_GLOBAL(slb_miss_kernel_load_xen_linear)
+ li r11,0
+ b slb_finish_load
+3:
+#endif
/* Linear mapping encoding bits, the "li" instruction below will
* be patched by the kernel at boot
*/
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