powerpc/mm: Increase the slice range to 64TB
This patch makes the high psizes mask as an unsigned char array
so that we can have more than 16TB. Currently we support upto
64TB
Reviewed-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/mm/slb_low.S b/arch/powerpc/mm/slb_low.S
index b9ee79ce..e132dc6 100644
--- a/arch/powerpc/mm/slb_low.S
+++ b/arch/powerpc/mm/slb_low.S
@@ -108,17 +108,31 @@
* between 4k and 64k standard page size
*/
#ifdef CONFIG_PPC_MM_SLICES
+ /* r10 have esid */
cmpldi r10,16
-
- /* Get the slice index * 4 in r11 and matching slice size mask in r9 */
- ld r9,PACALOWSLICESPSIZE(r13)
- sldi r11,r10,2
+ /* below SLICE_LOW_TOP */
blt 5f
- ld r9,PACAHIGHSLICEPSIZE(r13)
- srdi r11,r10,(SLICE_HIGH_SHIFT - SLICE_LOW_SHIFT - 2)
- andi. r11,r11,0x3c
+ /*
+ * Handle hpsizes,
+ * r9 is get_paca()->context.high_slices_psize[index], r11 is mask_index
+ */
+ srdi r11,r10,(SLICE_HIGH_SHIFT - SLICE_LOW_SHIFT + 1) /* index */
+ addi r9,r11,PACAHIGHSLICEPSIZE
+ lbzx r9,r13,r9 /* r9 is hpsizes[r11] */
+ /* r11 = (r10 >> (SLICE_HIGH_SHIFT - SLICE_LOW_SHIFT)) & 0x1 */
+ rldicl r11,r10,(64 - (SLICE_HIGH_SHIFT - SLICE_LOW_SHIFT)),63
+ b 6f
-5: /* Extract the psize and multiply to get an array offset */
+5:
+ /*
+ * Handle lpsizes
+ * r9 is get_paca()->context.low_slices_psize, r11 is index
+ */
+ ld r9,PACALOWSLICESPSIZE(r13)
+ mr r11,r10
+6:
+ sldi r11,r11,2 /* index * 4 */
+ /* Extract the psize and multiply to get an array offset */
srd r9,r9,r11
andi. r9,r9,0xf
mulli r9,r9,MMUPSIZEDEFSIZE