[PATCH] ARM: ixp4xx: move fixed mapping of internal devices into vmalloc region

gerg at snapgear.com gerg at snapgear.com
Fri Sep 7 01:40:00 EDT 2012

From: Greg Ungerer <gerg at uclinux.org>

The current fixed physical/virtual mappings for the internal peripherals
of the ixp4xx SoC devices is using a virtual address outside of the vmalloc
region. This results in kernel warnings like this on the boot console:

  BUG: mapping for 0xc8000000 at 0xffbeb000 out of vmalloc space
  BUG: mapping for 0xc4000000 at 0xffbfe000 out of vmalloc space
  BUG: mapping for 0xc0000000 at 0xffbff000 out of vmalloc space

The virtual kernel memory layout lists this for the vmalloc region:

    vmalloc : 0xc2800000 - 0xff000000   ( 968 MB)

With a little adjustment to the virtual address used we can map these
internal devices in the vmalloc region.

Signed-off-by: Greg Ungerer <gerg at uclinux.org>
 arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
index 97c530f..ad66605 100644
--- a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
+++ b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
@@ -32,11 +32,11 @@
  * 0x6000000	0x00004000	ioremap'd	QMgr
- * 0xC0000000	0x00001000	0xffbff000	PCI CFG
+ * 0xC0000000	0x00001000	0xfebff000	PCI CFG
- * 0xC4000000	0x00001000	0xffbfe000	EXP CFG
+ * 0xC4000000	0x00001000	0xfebfe000	EXP CFG
- * 0xC8000000	0x00013000	0xffbeb000	On-Chip Peripherals
+ * 0xC8000000	0x00013000	0xfebeb000	On-Chip Peripherals
@@ -49,21 +49,21 @@
  * Expansion BUS Configuration registers
 #define IXP4XX_EXP_CFG_BASE_PHYS	(0xC4000000)
 #define IXP4XX_EXP_CFG_REGION_SIZE	(0x00001000)
  * PCI Config registers
 #define IXP4XX_PCI_CFG_BASE_PHYS	(0xC0000000)
 #define IXP4XX_PCI_CFG_REGION_SIZE	(0x00001000)
  * Peripheral space
 #define IXP4XX_PERIPHERAL_BASE_PHYS	(0xC8000000)
 #define IXP4XX_PERIPHERAL_REGION_SIZE	(0x00013000)
@@ -73,7 +73,7 @@
  * aligned so that it * can be used with the low-level debug code.
 #define	IXP4XX_DEBUG_UART_BASE_PHYS	(0xC8000000)
-#define	IXP4XX_DEBUG_UART_BASE_VIRT	(0xffb00000)
+#define	IXP4XX_DEBUG_UART_BASE_VIRT	(0xfeb00000)
 #define	IXP4XX_DEBUG_UART_REGION_SIZE	(0x00001000)
 #define IXP4XX_EXP_CS0_OFFSET	0x00

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