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authorJeremy Fitzhardinge <jeremy@goop.org>2008-06-25 00:19:03 -0400
committerIngo Molnar <mingo@elte.hu>2008-07-08 13:10:28 +0200
commit4583ed514ea9ac844a6eb02d33120beaedf6837f (patch)
tree9df2d1e1a5d1726303f761954593defc483e2d20 /include/asm-x86/fixmap_64.h
parentbb23e403e5162765dabe3dc78646724753d6359b (diff)
x86, 64-bit: unify early_ioremap
The 32-bit early_ioremap will work equally well for 64-bit, so just use it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/fixmap_64.h')
-rw-r--r--include/asm-x86/fixmap_64.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-x86/fixmap_64.h b/include/asm-x86/fixmap_64.h
index 626098823a0..c7dcc365f47 100644
--- a/include/asm-x86/fixmap_64.h
+++ b/include/asm-x86/fixmap_64.h
@@ -49,6 +49,19 @@ enum fixed_addresses {
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
FIX_OHCI1394_BASE,
#endif
+ __end_of_permanent_fixed_addresses,
+ /*
+ * 256 temporary boot-time mappings, used by early_ioremap(),
+ * before ioremap() is functional.
+ *
+ * We round it up to the next 512 pages boundary so that we
+ * can have a single pgd entry and a single pte table:
+ */
+#define NR_FIX_BTMAPS 64
+#define FIX_BTMAPS_NESTING 4
+ FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
+ (__end_of_permanent_fixed_addresses & 511),
+ FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
__end_of_fixed_addresses
};