sparc64: Probe cpu page size support more portably.
On sun4v, interrogate the machine description. This code is extremely
defensive in nature, and a lot of the checks can probably be removed.
On sun4u things are a lot simpler. There are the page sizes all chips
support, and then Panther adds 32MB and 256MB pages.
Report the probed value in /proc/cpuinfo
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/mdesc.h b/arch/sparc/include/asm/mdesc.h
index 9faa046..139097f 100644
--- a/arch/sparc/include/asm/mdesc.h
+++ b/arch/sparc/include/asm/mdesc.h
@@ -73,6 +73,7 @@
extern void mdesc_fill_in_cpu_data(cpumask_t *mask);
extern void mdesc_populate_present_mask(cpumask_t *mask);
+extern void mdesc_get_page_sizes(cpumask_t *mask, unsigned long *pgsz_mask);
extern void sun4v_mdesc_init(void);