[ARM] 3859/1: Fix devicemaps_init() XIP_KERNEL odd 1MiB XIP_PHYS_ADDR translation error
The ARM XIP_KERNEL map created in devicemaps_init() is wrong.
The map.pfn is rounded down to an even 1MiB section boundary
which results in va/pa translations errors when XIP_PHYS_ADDR
starts on an odd 1MiB boundary and this causes the kernel to
hang. This patch fixes ARM XIP_KERNEL translation errors for
the odd 1MiB XIP_PHYS_ADDR boundary case.
Signed-off-by: George G. Davis <gdavis@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index 8d3919c..38b2b55 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -136,6 +136,13 @@
#define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR)
/*
+ * section address mask and size definitions.
+ */
+#define SECTION_SHIFT 20
+#define SECTION_SIZE (1UL << SECTION_SHIFT)
+#define SECTION_MASK (~(SECTION_SIZE-1))
+
+/*
* ARMv6 supersection address mask and size definitions.
*/
#define SUPERSECTION_SHIFT 24