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authorAndi Kleen <ak@suse.de>2006-03-25 16:30:22 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 18:10:55 +0100
commitf2d3efedbecc04dc348d723e4c90b46731b3bb48 (patch)
tree982c7838a97a5c2420de392e5a36f49eaa1778b0 /include/asm-x86_64
parent[PATCH] x86_64: Clean up and tweak ACPI blacklist year code (diff)
downloadlinux-f2d3efedbecc04dc348d723e4c90b46731b3bb48.tar.xz
linux-f2d3efedbecc04dc348d723e4c90b46731b3bb48.zip
[PATCH] x86_64: Implement early DMI scanning
There are more and more cases where we need to know DMI information early to work around bugs. i386 already had early DMI scanning, but x86-64 didn't. Implement this now. This required some cleanup in the i386 code. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/dmi.h27
-rw-r--r--include/asm-x86_64/io.h8
2 files changed, 30 insertions, 5 deletions
diff --git a/include/asm-x86_64/dmi.h b/include/asm-x86_64/dmi.h
new file mode 100644
index 000000000000..93b2b15d4325
--- /dev/null
+++ b/include/asm-x86_64/dmi.h
@@ -0,0 +1,27 @@
+#ifndef _ASM_DMI_H
+#define _ASM_DMI_H 1
+
+#include <asm/io.h>
+
+extern void *dmi_ioremap(unsigned long addr, unsigned long size);
+extern void dmi_iounmap(void *addr, unsigned long size);
+
+#define DMI_MAX_DATA 2048
+
+extern int dmi_alloc_index;
+extern char dmi_alloc_data[DMI_MAX_DATA];
+
+/* This is so early that there is no good way to allocate dynamic memory.
+ Allocate data in an BSS array. */
+static inline void *dmi_alloc(unsigned len)
+{
+ int idx = dmi_alloc_index;
+ if ((dmi_alloc_index += len) > DMI_MAX_DATA)
+ return NULL;
+ return dmi_alloc_data + idx;
+}
+
+#define dmi_ioremap early_ioremap
+#define dmi_iounmap early_iounmap
+
+#endif
diff --git a/include/asm-x86_64/io.h b/include/asm-x86_64/io.h
index a85fe8370820..ac12bda3bb1f 100644
--- a/include/asm-x86_64/io.h
+++ b/include/asm-x86_64/io.h
@@ -135,6 +135,9 @@ static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
return __ioremap(offset, size, 0);
}
+extern void *early_ioremap(unsigned long addr, unsigned long size);
+extern void early_iounmap(void *addr, unsigned long size);
+
/*
* This one maps high address device memory and turns off caching for that area.
* it's useful if some control registers are in such an area and write combining
@@ -143,11 +146,6 @@ static inline void __iomem * ioremap (unsigned long offset, unsigned long size)
extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
extern void iounmap(volatile void __iomem *addr);
-/* Use normal IO mappings for DMI */
-#define dmi_ioremap ioremap
-#define dmi_iounmap(x,l) iounmap(x)
-#define dmi_alloc(l) kmalloc(l, GFP_ATOMIC)
-
/*
* ISA I/O bus memory addresses are 1:1 with the physical address.
*/