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author | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
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committer | Srikant Patnaik | 2015-01-13 15:08:24 +0530 |
commit | 97327692361306d1e6259021bc425e32832fdb50 (patch) | |
tree | fe9088f3248ec61e24f404f21b9793cb644b7f01 /arch/parisc/include/asm/mmzone.h | |
parent | 2d05a8f663478a44e088d122e0d62109bbc801d0 (diff) | |
parent | a3a8b90b61e21be3dde9101c4e86c881e0f06210 (diff) | |
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dirty fix to merging
Diffstat (limited to 'arch/parisc/include/asm/mmzone.h')
-rw-r--r-- | arch/parisc/include/asm/mmzone.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/parisc/include/asm/mmzone.h b/arch/parisc/include/asm/mmzone.h new file mode 100644 index 00000000..e67eb9c3 --- /dev/null +++ b/arch/parisc/include/asm/mmzone.h @@ -0,0 +1,66 @@ +#ifndef _PARISC_MMZONE_H +#define _PARISC_MMZONE_H + +#ifdef CONFIG_DISCONTIGMEM + +#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ +extern int npmem_ranges; + +struct node_map_data { + pg_data_t pg_data; +}; + +extern struct node_map_data node_data[]; + +#define NODE_DATA(nid) (&node_data[nid].pg_data) + +/* We have these possible memory map layouts: + * Astro: 0-3.75, 67.75-68, 4-64 + * zx1: 0-1, 257-260, 4-256 + * Stretch (N-class): 0-2, 4-32, 34-xxx + */ + +/* Since each 1GB can only belong to one region (node), we can create + * an index table for pfn to nid lookup; each entry in pfnnid_map + * represents 1GB, and contains the node that the memory belongs to. */ + +#define PFNNID_SHIFT (30 - PAGE_SHIFT) +#define PFNNID_MAP_MAX 512 /* support 512GB */ +extern unsigned char pfnnid_map[PFNNID_MAP_MAX]; + +#ifndef CONFIG_64BIT +#define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) +#else +/* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ +#define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) +#endif + +static inline int pfn_to_nid(unsigned long pfn) +{ + unsigned int i; + unsigned char r; + + if (unlikely(pfn_is_io(pfn))) + return 0; + + i = pfn >> PFNNID_SHIFT; + BUG_ON(i >= sizeof(pfnnid_map) / sizeof(pfnnid_map[0])); + r = pfnnid_map[i]; + BUG_ON(r == 0xff); + + return (int)r; +} + +static inline int pfn_valid(int pfn) +{ + int nid = pfn_to_nid(pfn); + + if (nid >= 0) + return (pfn < node_end_pfn(nid)); + return 0; +} + +#else /* !CONFIG_DISCONTIGMEM */ +#define MAX_PHYSMEM_RANGES 1 +#endif +#endif /* _PARISC_MMZONE_H */ |