linux/arch/powerpc/include/asm/mmzone.h
Nishanth Aravamudan cd34206e94 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>
2010-11-29 15:48:21 +11:00

53 lines
1.2 KiB
C

/*
* Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
*
* PowerPC64 port:
* Copyright (C) 2002 Anton Blanchard, IBM Corp.
*/
#ifndef _ASM_MMZONE_H_
#define _ASM_MMZONE_H_
#ifdef __KERNEL__
#include <linux/cpumask.h>
/*
* generic non-linear memory support:
*
* 1) we will not split memory into more chunks than will fit into the
* flags field of the struct page
*/
#ifdef CONFIG_NEED_MULTIPLE_NODES
extern struct pglist_data *node_data[];
/*
* Return a pointer to the node data for node n.
*/
#define NODE_DATA(nid) (node_data[nid])
/*
* Following are specific to this numa platform.
*/
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
/*
* Following are macros that each numa implmentation must define.
*/
#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__ */
#endif /* _ASM_MMZONE_H_ */