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authorAlbert Herranz <albert_herranz@yahoo.es>2009-12-12 06:31:54 +0000
committerGrant Likely <grant.likely@secretlab.ca>2009-12-12 22:24:32 -0700
commitc5df7f775148723de39274537a886e9502eef336 (patch)
tree548acbcef58b1d60308f7e7cd894d514583895a2 /arch/powerpc/mm/pgtable_32.c
parentde32400dd26e743c5d500aa42d8d6818b79edb73 (diff)
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>
Diffstat (limited to 'arch/powerpc/mm/pgtable_32.c')
-rw-r--r--arch/powerpc/mm/pgtable_32.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index b55bbe87acb..177e4038b43 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -26,6 +26,7 @@
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/highmem.h>
+#include <linux/lmb.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
@@ -191,7 +192,8 @@ __ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
* Don't allow anybody to remap normal RAM that we're using.
* mem_init() sets high_memory so only do the check after that.
*/
- if (mem_init_done && (p < virt_to_phys(high_memory))) {
+ if (mem_init_done && (p < virt_to_phys(high_memory)) &&
+ !(__allow_ioremap_reserved && lmb_is_region_reserved(p, size))) {
printk("__ioremap(): phys addr 0x%llx is RAM lr %p\n",
(unsigned long long)p, __builtin_return_address(0));
return NULL;