* [PATCH 10/14] powerpc: add ps3 platform lpar addressing
@ 2006-11-22 4:20 Geoff Levand
0 siblings, 0 replies; only message in thread
From: Geoff Levand @ 2006-11-22 4:20 UTC (permalink / raw)
To: Paul Mackerras; +Cc: linuxppc-dev
From: Geoff Levand <geoffrey.levand@am•sony.com>
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: Arnd Bergmann <arnd.bergmann@de•ibm.com>
Signed-off-by: Geoff Levand <geoffrey.levand@am•sony.com>
---
arch/powerpc/platforms/ps3/Kconfig | 11 +++++++++++
include/asm-powerpc/sparsemem.h | 6 ++++++
2 files changed, 17 insertions(+)
Index: cell--common--6/arch/powerpc/platforms/ps3/Kconfig
===================================================================
--- cell--common--6.orig/arch/powerpc/platforms/ps3/Kconfig
+++ cell--common--6/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 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
Index: cell--common--6/include/asm-powerpc/sparsemem.h
===================================================================
--- cell--common--6.orig/include/asm-powerpc/sparsemem.h
+++ cell--common--6/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);
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