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-rw-r--r--arch/sparc64/mm/init.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index f0ab9aab308f..69538d1aa0ad 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -1645,6 +1645,58 @@ EXPORT_SYMBOL(_PAGE_E);
1645unsigned long _PAGE_CACHE __read_mostly; 1645unsigned long _PAGE_CACHE __read_mostly;
1646EXPORT_SYMBOL(_PAGE_CACHE); 1646EXPORT_SYMBOL(_PAGE_CACHE);
1647 1647
1648#ifdef CONFIG_SPARSEMEM_VMEMMAP
1649
1650#define VMEMMAP_CHUNK_SHIFT 22
1651#define VMEMMAP_CHUNK (1UL << VMEMMAP_CHUNK_SHIFT)
1652#define VMEMMAP_CHUNK_MASK ~(VMEMMAP_CHUNK - 1UL)
1653#define VMEMMAP_ALIGN(x) (((x)+VMEMMAP_CHUNK-1UL)&VMEMMAP_CHUNK_MASK)
1654
1655#define VMEMMAP_SIZE ((((1UL << MAX_PHYSADDR_BITS) >> PAGE_SHIFT) * \
1656 sizeof(struct page *)) >> VMEMMAP_CHUNK_SHIFT)
1657unsigned long vmemmap_table[VMEMMAP_SIZE];
1658
1659int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
1660{
1661 unsigned long vstart = (unsigned long) start;
1662 unsigned long vend = (unsigned long) (start + nr);
1663 unsigned long phys_start = (vstart - VMEMMAP_BASE);
1664 unsigned long phys_end = (vend - VMEMMAP_BASE);
1665 unsigned long addr = phys_start & VMEMMAP_CHUNK_MASK;
1666 unsigned long end = VMEMMAP_ALIGN(phys_end);
1667 unsigned long pte_base;
1668
1669 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U |
1670 _PAGE_CP_4U | _PAGE_CV_4U |
1671 _PAGE_P_4U | _PAGE_W_4U);
1672 if (tlb_type == hypervisor)
1673 pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V |
1674 _PAGE_CP_4V | _PAGE_CV_4V |
1675 _PAGE_P_4V | _PAGE_W_4V);
1676
1677 for (; addr < end; addr += VMEMMAP_CHUNK) {
1678 unsigned long *vmem_pp =
1679 vmemmap_table + (addr >> VMEMMAP_CHUNK_SHIFT);
1680 void *block;
1681
1682 if (!(*vmem_pp & _PAGE_VALID)) {
1683 block = vmemmap_alloc_block(1UL << 22, node);
1684 if (!block)
1685 return -ENOMEM;
1686
1687 *vmem_pp = pte_base | __pa(block);
1688
1689 printk(KERN_INFO "[%p-%p] page_structs=%lu "
1690 "node=%d entry=%lu/%lu\n", start, block, nr,
1691 node,
1692 addr >> VMEMMAP_CHUNK_SHIFT,
1693 VMEMMAP_SIZE >> VMEMMAP_CHUNK_SHIFT);
1694 }
1695 }
1696 return 0;
1697}
1698#endif /* CONFIG_SPARSEMEM_VMEMMAP */
1699
1648static void prot_init_common(unsigned long page_none, 1700static void prot_init_common(unsigned long page_none,
1649 unsigned long page_shared, 1701 unsigned long page_shared,
1650 unsigned long page_copy, 1702 unsigned long page_copy,