powerpc/iommu: Add it_page_shift field to determine iommu page size

This patch adds a it_page_shift field to struct iommu_table and
initiliases it to 4K for all platforms.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/pasemi/iommu.c b/arch/powerpc/platforms/pasemi/iommu.c
index 7d2d036754b5..2e576f2ae442 100644
--- a/arch/powerpc/platforms/pasemi/iommu.c
+++ b/arch/powerpc/platforms/pasemi/iommu.c
@@ -138,8 +138,11 @@ static void iommu_table_iobmap_setup(void)
         pr_debug(" -> %s\n", __func__);
         iommu_table_iobmap.it_busno = 0;
         iommu_table_iobmap.it_offset = 0;
+        iommu_table_iobmap.it_page_shift = IOBMAP_PAGE_SHIFT;
+
         /* it_size is in number of entries */
-        iommu_table_iobmap.it_size = 0x80000000 >> IOBMAP_PAGE_SHIFT;
+        iommu_table_iobmap.it_size =
+                0x80000000 >> iommu_table_iobmap.it_page_shift;
 
         /* Initialize the common IOMMU code */
         iommu_table_iobmap.it_base = (unsigned long)iob_l2_base;