powerpc: allow ioremap within reserved memory regions

Add a flag to let a platform ioremap memory regions marked as reserved.

This flag will be used later by the Nintendo Wii support code to allow
ioremapping the I/O region sitting between MEM1 and MEM2 and marked
as reserved RAM in the patch "wii: use both mem1 and mem2 as ram".

This will no longer be needed when proper discontig memory support
for 32-bit PowerPC is added to the kernel.

Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/lmb.h b/include/linux/lmb.h
index 2442e3f3d033..ef82b8fcbddb 100644
--- a/include/linux/lmb.h
+++ b/include/linux/lmb.h
@@ -54,6 +54,7 @@ extern u64 __init lmb_phys_mem_size(void);
 extern u64 lmb_end_of_DRAM(void);
 extern void __init lmb_enforce_memory_limit(u64 memory_limit);
 extern int __init lmb_is_reserved(u64 addr);
+extern int lmb_is_region_reserved(u64 base, u64 size);
 extern int lmb_find(struct lmb_property *res);
 
 extern void lmb_dump_all(void);