Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

[pandora-kernel.git] / arch / sparc64 / mm / init.c

diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index f0ab9aa..100c445 100644 (file)
--- 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,
@@ -1909,9 +1961,4 @@ void online_page(struct page *page)
        num_physpages++;
 }
 
-int remove_memory(u64 start, u64 size)
-{
-       return -EINVAL;
-}
-
 #endif /* CONFIG_MEMORY_HOTPLUG */