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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2005-05-03 12:20:29 +0100
committerRussell King <rmk@dyn-67.arm.linux.org.uk>2005-05-03 12:20:29 +0100
commit5c3073e691b56dabbdec60dda4258b4e50d64872 (patch)
tree073b46c9cb83d8e2a8e73e18849e79d193108ad2 /include/asm-arm
parent5cd0c3442021fbf39c7152b341a952aa24054be9 (diff)
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[PATCH] ARM: cleanup vmalloc start/offset macros
VMALLOC_START and VMALLOC_OFFSET are common between all ARM machine classes. Move them into include/asm-arm/pgtable.h, but allow a machine class to override them if required. Signed-off-by: Russell King <rmk@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm')
-rw-r--r--include/asm-arm/arch-cl7500/vmalloc.h11
-rw-r--r--include/asm-arm/arch-clps711x/vmalloc.h11
-rw-r--r--include/asm-arm/arch-ebsa110/vmalloc.h11
-rw-r--r--include/asm-arm/arch-ebsa285/vmalloc.h11
-rw-r--r--include/asm-arm/arch-epxa10db/vmalloc.h11
-rw-r--r--include/asm-arm/arch-h720x/vmalloc.h11
-rw-r--r--include/asm-arm/arch-imx/vmalloc.h12
-rw-r--r--include/asm-arm/arch-integrator/vmalloc.h11
-rw-r--r--include/asm-arm/arch-iop3xx/vmalloc.h3
-rw-r--r--include/asm-arm/arch-ixp2000/vmalloc.h3
-rw-r--r--include/asm-arm/arch-ixp4xx/vmalloc.h12
-rw-r--r--include/asm-arm/arch-l7200/vmalloc.h11
-rw-r--r--include/asm-arm/arch-lh7a40x/vmalloc.h11
-rw-r--r--include/asm-arm/arch-omap/vmalloc.h12
-rw-r--r--include/asm-arm/arch-pxa/vmalloc.h11
-rw-r--r--include/asm-arm/arch-rpc/vmalloc.h11
-rw-r--r--include/asm-arm/arch-s3c2410/vmalloc.h12
-rw-r--r--include/asm-arm/arch-sa1100/vmalloc.h11
-rw-r--r--include/asm-arm/arch-shark/vmalloc.h11
-rw-r--r--include/asm-arm/arch-versatile/vmalloc.h12
-rw-r--r--include/asm-arm/pgtable.h17
21 files changed, 17 insertions, 209 deletions
diff --git a/include/asm-arm/arch-cl7500/vmalloc.h b/include/asm-arm/arch-cl7500/vmalloc.h
index 91883def4889..ba8d7a84456a 100644
--- a/include/asm-arm/arch-cl7500/vmalloc.h
+++ b/include/asm-arm/arch-cl7500/vmalloc.h
@@ -1,15 +1,4 @@
/*
* linux/include/asm-arm/arch-cl7500/vmalloc.h
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x1c000000)
diff --git a/include/asm-arm/arch-clps711x/vmalloc.h b/include/asm-arm/arch-clps711x/vmalloc.h
index 42571ed5e493..a5dfe96abc96 100644
--- a/include/asm-arm/arch-clps711x/vmalloc.h
+++ b/include/asm-arm/arch-clps711x/vmalloc.h
@@ -17,15 +17,4 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
diff --git a/include/asm-arm/arch-ebsa110/vmalloc.h b/include/asm-arm/arch-ebsa110/vmalloc.h
index 759659be109f..26674ba4683c 100644
--- a/include/asm-arm/arch-ebsa110/vmalloc.h
+++ b/include/asm-arm/arch-ebsa110/vmalloc.h
@@ -7,15 +7,4 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x1f000000)
diff --git a/include/asm-arm/arch-ebsa285/vmalloc.h b/include/asm-arm/arch-ebsa285/vmalloc.h
index def705a3c209..d1ca955ce434 100644
--- a/include/asm-arm/arch-ebsa285/vmalloc.h
+++ b/include/asm-arm/arch-ebsa285/vmalloc.h
@@ -8,17 +8,6 @@
#include <linux/config.h>
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-
#ifdef CONFIG_ARCH_FOOTBRIDGE
#define VMALLOC_END (PAGE_OFFSET + 0x30000000)
#else
diff --git a/include/asm-arm/arch-epxa10db/vmalloc.h b/include/asm-arm/arch-epxa10db/vmalloc.h
index d31ef8584760..546fb7d2b6ad 100644
--- a/include/asm-arm/arch-epxa10db/vmalloc.h
+++ b/include/asm-arm/arch-epxa10db/vmalloc.h
@@ -17,15 +17,4 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
diff --git a/include/asm-arm/arch-h720x/vmalloc.h b/include/asm-arm/arch-h720x/vmalloc.h
index 4af523a5e189..b4693cb821ef 100644
--- a/include/asm-arm/arch-h720x/vmalloc.h
+++ b/include/asm-arm/arch-h720x/vmalloc.h
@@ -5,17 +5,6 @@
#ifndef __ARCH_ARM_VMALLOC_H
#define __ARCH_ARM_VMALLOC_H
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
#endif
diff --git a/include/asm-arm/arch-imx/vmalloc.h b/include/asm-arm/arch-imx/vmalloc.h
index 252038f48163..cb6169127068 100644
--- a/include/asm-arm/arch-imx/vmalloc.h
+++ b/include/asm-arm/arch-imx/vmalloc.h
@@ -17,16 +17,4 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
diff --git a/include/asm-arm/arch-integrator/vmalloc.h b/include/asm-arm/arch-integrator/vmalloc.h
index 50e9aee79486..170cccece523 100644
--- a/include/asm-arm/arch-integrator/vmalloc.h
+++ b/include/asm-arm/arch-integrator/vmalloc.h
@@ -17,15 +17,4 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
diff --git a/include/asm-arm/arch-iop3xx/vmalloc.h b/include/asm-arm/arch-iop3xx/vmalloc.h
index dc1d2a957164..0f2f6847f93c 100644
--- a/include/asm-arm/arch-iop3xx/vmalloc.h
+++ b/include/asm-arm/arch-iop3xx/vmalloc.h
@@ -10,9 +10,6 @@
* The vmalloc() routines leaves a hole of 4kB between each vmalloced
* area for the same reason. ;)
*/
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
//#define VMALLOC_END (0xe8000000)
/* increase usable physical RAM to ~992M per RMK */
#define VMALLOC_END (0xfe000000)
diff --git a/include/asm-arm/arch-ixp2000/vmalloc.h b/include/asm-arm/arch-ixp2000/vmalloc.h
index 2e4bcbcf31f0..473dff4ec561 100644
--- a/include/asm-arm/arch-ixp2000/vmalloc.h
+++ b/include/asm-arm/arch-ixp2000/vmalloc.h
@@ -17,7 +17,4 @@
* The vmalloc() routines leaves a hole of 4kB between each vmalloced
* area for the same reason. ;)
*/
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END 0xfaffefff
diff --git a/include/asm-arm/arch-ixp4xx/vmalloc.h b/include/asm-arm/arch-ixp4xx/vmalloc.h
index da46e560ad6f..050d46e6b126 100644
--- a/include/asm-arm/arch-ixp4xx/vmalloc.h
+++ b/include/asm-arm/arch-ixp4xx/vmalloc.h
@@ -1,17 +1,5 @@
/*
* linux/include/asm-arm/arch-ixp4xx/vmalloc.h
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END (0xFF000000)
diff --git a/include/asm-arm/arch-l7200/vmalloc.h b/include/asm-arm/arch-l7200/vmalloc.h
index edeaebe1f14a..816231eedaac 100644
--- a/include/asm-arm/arch-l7200/vmalloc.h
+++ b/include/asm-arm/arch-l7200/vmalloc.h
@@ -1,15 +1,4 @@
/*
* linux/include/asm-arm/arch-l7200/vmalloc.h
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
diff --git a/include/asm-arm/arch-lh7a40x/vmalloc.h b/include/asm-arm/arch-lh7a40x/vmalloc.h
index 5ac607925bea..8163e45109b9 100644
--- a/include/asm-arm/arch-lh7a40x/vmalloc.h
+++ b/include/asm-arm/arch-lh7a40x/vmalloc.h
@@ -7,15 +7,4 @@
* version 2 as published by the Free Software Foundation.
*
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after
- * the physical memory until the kernel virtual memory starts. That
- * means that any out-of-bounds memory accesses will hopefully be
- * caught. The vmalloc() routines leaves a hole of 4kB (one page)
- * between each vmalloced area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (0xe8000000)
diff --git a/include/asm-arm/arch-omap/vmalloc.h b/include/asm-arm/arch-omap/vmalloc.h
index c6a83581a2fc..5b8bd8dae8be 100644
--- a/include/asm-arm/arch-omap/vmalloc.h
+++ b/include/asm-arm/arch-omap/vmalloc.h
@@ -17,17 +17,5 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
diff --git a/include/asm-arm/arch-pxa/vmalloc.h b/include/asm-arm/arch-pxa/vmalloc.h
index 3381af6ddb0d..5bb450c7aa2c 100644
--- a/include/asm-arm/arch-pxa/vmalloc.h
+++ b/include/asm-arm/arch-pxa/vmalloc.h
@@ -8,15 +8,4 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (0xe8000000)
diff --git a/include/asm-arm/arch-rpc/vmalloc.h b/include/asm-arm/arch-rpc/vmalloc.h
index a13c27f37d71..077046bb2f36 100644
--- a/include/asm-arm/arch-rpc/vmalloc.h
+++ b/include/asm-arm/arch-rpc/vmalloc.h
@@ -7,15 +7,4 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x1c000000)
diff --git a/include/asm-arm/arch-s3c2410/vmalloc.h b/include/asm-arm/arch-s3c2410/vmalloc.h
index 5fe72ad70904..33963cd5461b 100644
--- a/include/asm-arm/arch-s3c2410/vmalloc.h
+++ b/include/asm-arm/arch-s3c2410/vmalloc.h
@@ -19,18 +19,6 @@
#ifndef __ASM_ARCH_VMALLOC_H
#define __ASM_ARCH_VMALLOC_H
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END (0xE0000000)
#endif /* __ASM_ARCH_VMALLOC_H */
diff --git a/include/asm-arm/arch-sa1100/vmalloc.h b/include/asm-arm/arch-sa1100/vmalloc.h
index 135bc9493c06..2fb1c6f3aa1b 100644
--- a/include/asm-arm/arch-sa1100/vmalloc.h
+++ b/include/asm-arm/arch-sa1100/vmalloc.h
@@ -1,15 +1,4 @@
/*
* linux/include/asm-arm/arch-sa1100/vmalloc.h
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (0xe8000000)
diff --git a/include/asm-arm/arch-shark/vmalloc.h b/include/asm-arm/arch-shark/vmalloc.h
index 1cc20098f690..10db5d188231 100644
--- a/include/asm-arm/arch-shark/vmalloc.h
+++ b/include/asm-arm/arch-shark/vmalloc.h
@@ -1,15 +1,4 @@
/*
* linux/include/asm-arm/arch-rpc/vmalloc.h
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
#define VMALLOC_END (PAGE_OFFSET + 0x10000000)
diff --git a/include/asm-arm/arch-versatile/vmalloc.h b/include/asm-arm/arch-versatile/vmalloc.h
index adfb34829bfc..ac780df62156 100644
--- a/include/asm-arm/arch-versatile/vmalloc.h
+++ b/include/asm-arm/arch-versatile/vmalloc.h
@@ -18,16 +18,4 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
-/*
- * Just any arbitrary offset to the start of the vmalloc VM area: the
- * current 8MB value just means that there will be a 8MB "hole" after the
- * physical memory until the kernel virtual memory starts. That means that
- * any out-of-bounds memory accesses will hopefully be caught.
- * The vmalloc() routines leaves a hole of 4kB between each vmalloced
- * area for the same reason. ;)
- */
-#define VMALLOC_OFFSET (8*1024*1024)
-#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
-#define VMALLOC_VMADDR(x) ((unsigned long)(x))
#define VMALLOC_END (PAGE_OFFSET + 0x18000000)
diff --git a/include/asm-arm/pgtable.h b/include/asm-arm/pgtable.h
index 2df4eacf4fa9..a9892eb42a23 100644
--- a/include/asm-arm/pgtable.h
+++ b/include/asm-arm/pgtable.h
@@ -17,6 +17,23 @@
#include <asm/arch/vmalloc.h>
/*
+ * Just any arbitrary offset to the start of the vmalloc VM area: the
+ * current 8MB value just means that there will be a 8MB "hole" after the
+ * physical memory until the kernel virtual memory starts. That means that
+ * any out-of-bounds memory accesses will hopefully be caught.
+ * The vmalloc() routines leaves a hole of 4kB between each vmalloced
+ * area for the same reason. ;)
+ *
+ * Note that platforms may override VMALLOC_START, but they must provide
+ * VMALLOC_END. VMALLOC_END defines the (exclusive) limit of this space,
+ * which may not overlap IO space.
+ */
+#ifndef VMALLOC_START
+#define VMALLOC_OFFSET (8*1024*1024)
+#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
+#endif
+
+/*
* Hardware-wise, we have a two level page table structure, where the first
* level has 4096 entries, and the second level has 256 entries. Each entry
* is one 32-bit word. Most of the bits in the second level entry are used