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authorNishanth Aravamudan <nacc@us.ibm.com>2010-10-26 17:35:12 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2010-11-29 15:48:21 +1100
commitcd34206e949b66d3c5fa3e4d2905aa4af29d1b85 (patch)
tree361054eb08328d8d9f5ceaba4d8a90ba52244c58 /arch/powerpc/include
parentf6aedd8606ae673f8e1f4d972fc86c451fbc8ba7 (diff)
powerpc: Add memory_hotplug_max()
Add a function to get the maximum address that can be hotplug added. This is needed to calculate the size of the tce table needed to cover all memory in 1:1 mode. Signed-off-by: Milton Miller <miltonm@bga.com> Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
-rw-r--r--arch/powerpc/include/asm/mmzone.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mmzone.h b/arch/powerpc/include/asm/mmzone.h
index aac87cbceb57..fd3fd58bad84 100644
--- a/arch/powerpc/include/asm/mmzone.h
+++ b/arch/powerpc/include/asm/mmzone.h
@@ -33,6 +33,9 @@ extern int numa_cpu_lookup_table[];
extern cpumask_var_t node_to_cpumask_map[];
#ifdef CONFIG_MEMORY_HOTPLUG
extern unsigned long max_pfn;
+u64 memory_hotplug_max(void);
+#else
+#define memory_hotplug_max() memblock_end_of_DRAM()
#endif
/*
@@ -42,6 +45,8 @@ extern unsigned long max_pfn;
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) (NODE_DATA(nid)->node_end_pfn)
+#else
+#define memory_hotplug_max() memblock_end_of_DRAM()
#endif /* CONFIG_NEED_MULTIPLE_NODES */
#endif /* __KERNEL__ */