diff options
| author | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
|---|---|---|
| committer | Yuval Adam <_@yuv.al> | 2017-08-30 08:25:59 +0000 |
| commit | 8e4bff4cab0ddac6060645b0715210484d02ff40 (patch) | |
| tree | 3a5c3024371a04692a3a6d9974d001cdff8ebf84 /arch/x86/include/asm/mmzone_32.h | |
Diffstat (limited to 'arch/x86/include/asm/mmzone_32.h')
| -rw-r--r-- | arch/x86/include/asm/mmzone_32.h | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mmzone_32.h b/arch/x86/include/asm/mmzone_32.h new file mode 100644 index 00000000..8a9b3e28 --- /dev/null +++ b/arch/x86/include/asm/mmzone_32.h @@ -0,0 +1,58 @@ +/* + * 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> + +#endif /* CONFIG_NUMA */ + +#ifdef CONFIG_DISCONTIGMEM + +/* + * generic node memory support, the following assumptions apply: + * + * 1) memory comes in 64Mb contiguous 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_SECTIONS 1024 +#define PAGES_PER_SECTION (MAX_NR_PAGES/MAX_SECTIONS) + +extern s8 physnode_map[]; + +static inline int pfn_to_nid(unsigned long pfn) +{ +#ifdef CONFIG_NUMA + return((int) physnode_map[(pfn) / PAGES_PER_SECTION]); +#else + return 0; +#endif +} + +static inline int pfn_valid(int pfn) +{ + int nid = pfn_to_nid(pfn); + + if (nid >= 0) + return (pfn < node_end_pfn(nid)); + return 0; +} + +#define early_pfn_valid(pfn) pfn_valid((pfn)) + +#endif /* CONFIG_DISCONTIGMEM */ + +#endif /* _ASM_X86_MMZONE_32_H */ |