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author | 2005-04-16 15:20:36 -0700 | |
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committer | 2005-04-16 15:20:36 -0700 | |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-parisc/mmzone.h | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-parisc/mmzone.h')
-rw-r--r-- | include/asm-parisc/mmzone.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/include/asm-parisc/mmzone.h b/include/asm-parisc/mmzone.h new file mode 100644 index 000000000000..928bf50c4693 --- /dev/null +++ b/include/asm-parisc/mmzone.h @@ -0,0 +1,102 @@ +#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) + +/* + * Given a kernel address, find the home node of the underlying memory. + */ +#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT) + +#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map) +#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; \ +}) +#define node_localnr(pfn, nid) ((pfn) - node_start_pfn(nid)) + +#define local_mapnr(kvaddr) \ +({ \ + unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT; \ + (__pfn - node_start_pfn(pfn_to_nid(__pfn))); \ +}) + +#define pfn_to_page(pfn) \ +({ \ + unsigned long __pfn = (pfn); \ + int __node = pfn_to_nid(__pfn); \ + &node_mem_map(__node)[node_localnr(__pfn,__node)]; \ +}) + +#define page_to_pfn(pg) \ +({ \ + struct page *__page = pg; \ + struct zone *__zone = page_zone(__page); \ + BUG_ON(__zone == NULL); \ + (unsigned long)(__page - __zone->zone_mem_map) \ + + __zone->zone_start_pfn; \ +}) + +/* 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 __LP64__ +#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 */ |