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powerpc: allow ioremap within reserved memory regions

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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>
This commit is contained in:
Albert Herranz
2009-12-12 06:31:54 +00:00
committed by Grant Likely
parent de32400dd2
commit c5df7f7751
5 changed files with 16 additions and 2 deletions
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1
arch/powerpc/mm/mmu_decl.h
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@@ -115,6 +115,7 @@ extern void settlbcam(int index, unsigned long virt, phys_addr_t phys,
extern void invalidate_tlbcam_entry(int index);
extern int __map_without_bats;
extern int __allow_ioremap_reserved;
extern unsigned long ioremap_base;
extern unsigned int rtas_data, rtas_size;