134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/*
|
|
* Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
|
|
*
|
|
*/
|
|
|
|
#ifndef ASM_X86__MMZONE_32_H
|
|
#define ASM_X86__MMZONE_32_H
|
|
|
|
#include <asm/smp.h>
|
|
|
|
#ifdef CONFIG_NUMA
|
|
extern struct pglist_data *node_data[];
|
|
#define NODE_DATA(nid) (node_data[nid])
|
|
|
|
#include <asm/numaq.h>
|
|
/* summit or generic arch */
|
|
#include <asm/srat.h>
|
|
|
|
extern int get_memcfg_numa_flat(void);
|
|
/*
|
|
* This allows any one NUMA architecture to be compiled
|
|
* for, and still fall back to the flat function if it
|
|
* fails.
|
|
*/
|
|
static inline void get_memcfg_numa(void)
|
|
{
|
|
|
|
if (get_memcfg_numaq())
|
|
return;
|
|
if (get_memcfg_from_srat())
|
|
return;
|
|
get_memcfg_numa_flat();
|
|
}
|
|
|
|
extern int early_pfn_to_nid(unsigned long pfn);
|
|
|
|
#else /* !CONFIG_NUMA */
|
|
|
|
#define get_memcfg_numa get_memcfg_numa_flat
|
|
|
|
#endif /* CONFIG_NUMA */
|
|
|
|
#ifdef CONFIG_DISCONTIGMEM
|
|
|
|
/*
|
|
* generic node memory support, the following assumptions apply:
|
|
*
|
|
* 1) memory comes in 64Mb contigious chunks which are either present or not
|
|
* 2) we will not have more than 64Gb in total
|
|
*
|
|
* for now assume that 64Gb is max amount of RAM for whole system
|
|
* 64Gb / 4096bytes/page = 16777216 pages
|
|
*/
|
|
#define MAX_NR_PAGES 16777216
|
|
#define MAX_ELEMENTS 1024
|
|
#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
|
|
|
|
extern s8 physnode_map[];
|
|
|
|
static inline int pfn_to_nid(unsigned long pfn)
|
|
{
|
|
#ifdef CONFIG_NUMA
|
|
return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
|
|
#else
|
|
return 0;
|
|
#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) \
|
|
({ \
|
|
pg_data_t *__pgdat = NODE_DATA(nid); \
|
|
__pgdat->node_start_pfn + __pgdat->node_spanned_pages; \
|
|
})
|
|
|
|
static inline int pfn_valid(int pfn)
|
|
{
|
|
int nid = pfn_to_nid(pfn);
|
|
|
|
if (nid >= 0)
|
|
return (pfn < node_end_pfn(nid));
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_DISCONTIGMEM */
|
|
|
|
#ifdef CONFIG_NEED_MULTIPLE_NODES
|
|
|
|
/*
|
|
* Following are macros that are specific to this numa platform.
|
|
*/
|
|
#define reserve_bootmem(addr, size, flags) \
|
|
reserve_bootmem_node(NODE_DATA(0), (addr), (size), (flags))
|
|
#define alloc_bootmem(x) \
|
|
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_nopanic(x) \
|
|
__alloc_bootmem_node_nopanic(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
|
|
__pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_low(x) \
|
|
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
|
|
#define alloc_bootmem_pages(x) \
|
|
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_pages_nopanic(x) \
|
|
__alloc_bootmem_node_nopanic(NODE_DATA(0), (x), PAGE_SIZE, \
|
|
__pa(MAX_DMA_ADDRESS))
|
|
#define alloc_bootmem_low_pages(x) \
|
|
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
|
|
#define alloc_bootmem_node(pgdat, x) \
|
|
({ \
|
|
struct pglist_data __maybe_unused \
|
|
*__alloc_bootmem_node__pgdat = (pgdat); \
|
|
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, \
|
|
__pa(MAX_DMA_ADDRESS)); \
|
|
})
|
|
#define alloc_bootmem_pages_node(pgdat, x) \
|
|
({ \
|
|
struct pglist_data __maybe_unused \
|
|
*__alloc_bootmem_node__pgdat = (pgdat); \
|
|
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, \
|
|
__pa(MAX_DMA_ADDRESS)); \
|
|
})
|
|
#define alloc_bootmem_low_pages_node(pgdat, x) \
|
|
({ \
|
|
struct pglist_data __maybe_unused \
|
|
*__alloc_bootmem_node__pgdat = (pgdat); \
|
|
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0); \
|
|
})
|
|
#endif /* CONFIG_NEED_MULTIPLE_NODES */
|
|
|
|
#endif /* ASM_X86__MMZONE_32_H */
|