[POWERPC] ps3: add lpar addressing
Adds some needed bits for a config option PS3_USE_LPAR_ADDR that disables
the PS3 lpar address translation mechanism. This is a currently needed
workaround for limitations in the design of the generic cell spu support.
Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
index f023719..451bfcd 100644
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -29,4 +29,15 @@
This support is mainly for Linux kernel development. If unsure,
say N.
+config PS3_USE_LPAR_ADDR
+ depends on PPC_PS3 && EXPERIMENTAL
+ bool "PS3 use lpar address space"
+ default y
+ help
+ This option is solely for experimentation by experts. Disables
+ translation of lpar addresses. SPE support currently won't work
+ without this set to y.
+
+ If you have any doubt, choose the default y.
+
endmenu
diff --git a/include/asm-powerpc/sparsemem.h b/include/asm-powerpc/sparsemem.h
index 38b1ea3..48ad807 100644
--- a/include/asm-powerpc/sparsemem.h
+++ b/include/asm-powerpc/sparsemem.h
@@ -9,8 +9,14 @@
* MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space
*/
#define SECTION_SIZE_BITS 24
+
+#if defined(CONFIG_PS3_USE_LPAR_ADDR)
+#define MAX_PHYSADDR_BITS 47
+#define MAX_PHYSMEM_BITS 47
+#else
#define MAX_PHYSADDR_BITS 44
#define MAX_PHYSMEM_BITS 44
+#endif
#ifdef CONFIG_MEMORY_HOTPLUG
extern void create_section_mapping(unsigned long start, unsigned long end);