* Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
* and Cort Dougan (PReP) (cort@cs.nmt.edu)
* Copyright (C) 1996 Paul Mackerras
- * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
*
* Derived from "arch/i386/mm/init.c"
* Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
}
#endif
+#ifdef CONFIG_PROC_KCORE
static struct kcore_list kcore_vmem;
static int __init setup_kcore(void)
return 0;
}
module_init(setup_kcore);
+#endif
static void zero_ctor(void *addr, struct kmem_cache *cache, unsigned long flags)
{
memset(addr, 0, kmem_cache_size(cache));
}
-#ifdef CONFIG_PPC_64K_PAGES
-static const unsigned int pgtable_cache_size[3] = {
- PTE_TABLE_SIZE, PMD_TABLE_SIZE, PGD_TABLE_SIZE
-};
-static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = {
- "pte_pmd_cache", "pmd_cache", "pgd_cache",
-};
-#else
static const unsigned int pgtable_cache_size[2] = {
- PTE_TABLE_SIZE, PMD_TABLE_SIZE
+ PGD_TABLE_SIZE, PMD_TABLE_SIZE
};
static const char *pgtable_cache_name[ARRAY_SIZE(pgtable_cache_size)] = {
- "pgd_pte_cache", "pud_pmd_cache",
-};
+#ifdef CONFIG_PPC_64K_PAGES
+ "pgd_cache", "pmd_cache",
+#else
+ "pgd_cache", "pud_pmd_cache",
#endif /* CONFIG_PPC_64K_PAGES */
+};
#ifdef CONFIG_HUGETLB_PAGE
/* Hugepages need one extra cache, initialized in hugetlbpage.c. We
pgtable_cache[i] = kmem_cache_create(name,
size, size,
SLAB_PANIC,
- zero_ctor,
- NULL);
+ zero_ctor);
+ }
+}
+
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+/*
+ * Given an address within the vmemmap, determine the pfn of the page that
+ * represents the start of the section it is within. Note that we have to
+ * do this by hand as the proffered address may not be correctly aligned.
+ * Subtraction of non-aligned pointers produces undefined results.
+ */
+unsigned long __meminit vmemmap_section_start(unsigned long page)
+{
+ unsigned long offset = page - ((unsigned long)(vmemmap));
+
+ /* Return the pfn of the start of the section. */
+ return (offset / sizeof(struct page)) & PAGE_SECTION_MASK;
+}
+
+/*
+ * Check if this vmemmap page is already initialised. If any section
+ * which overlaps this vmemmap page is initialised then this page is
+ * initialised already.
+ */
+int __meminit vmemmap_populated(unsigned long start, int page_size)
+{
+ unsigned long end = start + page_size;
+
+ for (; start < end; start += (PAGES_PER_SECTION * sizeof(struct page)))
+ if (pfn_valid(vmemmap_section_start(start)))
+ return 1;
+
+ return 0;
+}
+
+int __meminit vmemmap_populate(struct page *start_page,
+ unsigned long nr_pages, int node)
+{
+ unsigned long mode_rw;
+ unsigned long start = (unsigned long)start_page;
+ unsigned long end = (unsigned long)(start_page + nr_pages);
+ unsigned long page_size = 1 << mmu_psize_defs[mmu_linear_psize].shift;
+
+ mode_rw = _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_COHERENT | PP_RWXX;
+
+ /* Align to the page size of the linear mapping. */
+ start = _ALIGN_DOWN(start, page_size);
+
+ for (; start < end; start += page_size) {
+ int mapped;
+ void *p;
+
+ if (vmemmap_populated(start, page_size))
+ continue;
+
+ p = vmemmap_alloc_block(page_size, node);
+ if (!p)
+ return -ENOMEM;
+
+ printk(KERN_WARNING "vmemmap %08lx allocated at %p, "
+ "physical %08lx.\n", start, p, __pa(p));
+
+ mapped = htab_bolt_mapping(start, start + page_size,
+ __pa(p), mode_rw, mmu_linear_psize,
+ mmu_kernel_ssize);
+ BUG_ON(mapped < 0);
}
+
+ return 0;
}
+#endif