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authorPaul Mackerras <paulus@samba.org>2008-05-16 23:13:42 +1000
committerPaul Mackerras <paulus@samba.org>2008-05-16 23:13:42 +1000
commitfcff474ea5cb17ff015aa40e92ed86fede41f1e2 (patch)
treea99c0e14daaf31cb078812fb2fbc6abadfcd738f /arch/powerpc/mm/hash_utils_64.c
parent541b2755c2ef7dd2242ac606c115daa11e43ef69 (diff)
parentf26a3988917913b3d11b2bd741601a2c64ab9204 (diff)
Merge branch 'linux-2.6' into powerpc-next
Diffstat (limited to 'arch/powerpc/mm/hash_utils_64.c')
-rw-r--r--arch/powerpc/mm/hash_utils_64.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 05f955f8df3..bf5b6d7ed30 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -94,6 +94,9 @@ unsigned long htab_hash_mask;
int mmu_linear_psize = MMU_PAGE_4K;
int mmu_virtual_psize = MMU_PAGE_4K;
int mmu_vmalloc_psize = MMU_PAGE_4K;
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+int mmu_vmemmap_psize = MMU_PAGE_4K;
+#endif
int mmu_io_psize = MMU_PAGE_4K;
int mmu_kernel_ssize = MMU_SEGSIZE_256M;
int mmu_highuser_ssize = MMU_SEGSIZE_256M;
@@ -387,11 +390,32 @@ static void __init htab_init_page_sizes(void)
}
#endif /* CONFIG_PPC_64K_PAGES */
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+ /* We try to use 16M pages for vmemmap if that is supported
+ * and we have at least 1G of RAM at boot
+ */
+ if (mmu_psize_defs[MMU_PAGE_16M].shift &&
+ lmb_phys_mem_size() >= 0x40000000)
+ mmu_vmemmap_psize = MMU_PAGE_16M;
+ else if (mmu_psize_defs[MMU_PAGE_64K].shift)
+ mmu_vmemmap_psize = MMU_PAGE_64K;
+ else
+ mmu_vmemmap_psize = MMU_PAGE_4K;
+#endif /* CONFIG_SPARSEMEM_VMEMMAP */
+
printk(KERN_DEBUG "Page orders: linear mapping = %d, "
- "virtual = %d, io = %d\n",
+ "virtual = %d, io = %d"
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+ ", vmemmap = %d"
+#endif
+ "\n",
mmu_psize_defs[mmu_linear_psize].shift,
mmu_psize_defs[mmu_virtual_psize].shift,
- mmu_psize_defs[mmu_io_psize].shift);
+ mmu_psize_defs[mmu_io_psize].shift
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+ ,mmu_psize_defs[mmu_vmemmap_psize].shift
+#endif
+ );
#ifdef CONFIG_HUGETLB_PAGE
/* Init large page size. Currently, we pick 16M or 1M depending