diff options
Diffstat (limited to 'arch/sparc64/mm/init.c')
| -rw-r--r-- | arch/sparc64/mm/init.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c index f0ab9aab308..69538d1aa0a 100644 --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -1645,6 +1645,58 @@ EXPORT_SYMBOL(_PAGE_E); unsigned long _PAGE_CACHE __read_mostly; EXPORT_SYMBOL(_PAGE_CACHE); +#ifdef CONFIG_SPARSEMEM_VMEMMAP + +#define VMEMMAP_CHUNK_SHIFT 22 +#define VMEMMAP_CHUNK (1UL << VMEMMAP_CHUNK_SHIFT) +#define VMEMMAP_CHUNK_MASK ~(VMEMMAP_CHUNK - 1UL) +#define VMEMMAP_ALIGN(x) (((x)+VMEMMAP_CHUNK-1UL)&VMEMMAP_CHUNK_MASK) + +#define VMEMMAP_SIZE ((((1UL << MAX_PHYSADDR_BITS) >> PAGE_SHIFT) * \ + sizeof(struct page *)) >> VMEMMAP_CHUNK_SHIFT) +unsigned long vmemmap_table[VMEMMAP_SIZE]; + +int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node) +{ + unsigned long vstart = (unsigned long) start; + unsigned long vend = (unsigned long) (start + nr); + unsigned long phys_start = (vstart - VMEMMAP_BASE); + unsigned long phys_end = (vend - VMEMMAP_BASE); + unsigned long addr = phys_start & VMEMMAP_CHUNK_MASK; + unsigned long end = VMEMMAP_ALIGN(phys_end); + unsigned long pte_base; + + pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U | + _PAGE_CP_4U | _PAGE_CV_4U | + _PAGE_P_4U | _PAGE_W_4U); + if (tlb_type == hypervisor) + pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V | + _PAGE_CP_4V | _PAGE_CV_4V | + _PAGE_P_4V | _PAGE_W_4V); + + for (; addr < end; addr += VMEMMAP_CHUNK) { + unsigned long *vmem_pp = + vmemmap_table + (addr >> VMEMMAP_CHUNK_SHIFT); + void *block; + + if (!(*vmem_pp & _PAGE_VALID)) { + block = vmemmap_alloc_block(1UL << 22, node); + if (!block) + return -ENOMEM; + + *vmem_pp = pte_base | __pa(block); + + printk(KERN_INFO "[%p-%p] page_structs=%lu " + "node=%d entry=%lu/%lu\n", start, block, nr, + node, + addr >> VMEMMAP_CHUNK_SHIFT, + VMEMMAP_SIZE >> VMEMMAP_CHUNK_SHIFT); + } + } + return 0; +} +#endif /* CONFIG_SPARSEMEM_VMEMMAP */ + static void prot_init_common(unsigned long page_none, unsigned long page_shared, unsigned long page_copy, |