[PATCH 06/15] ARM: footbridge: use fixed PCI i/o mapping
Rob Herring
robherring2 at gmail.com
Fri Jul 6 14:40:31 EDT 2012
From: Rob Herring <rob.herring at calxeda.com>
Move footbridge PCI to fixed i/o mapping. io.h is still needed for the
!MMU case.
Signed-off-by: Rob Herring <rob.herring at calxeda.com>
Cc: Russell King <linux at arm.linux.org.uk>
---
arch/arm/Kconfig | 2 +-
arch/arm/mach-footbridge/common.c | 10 ++++------
.../arm/mach-footbridge/include/mach/debug-macro.S | 3 ++-
arch/arm/mach-footbridge/include/mach/io.h | 12 ++----------
4 files changed, 9 insertions(+), 18 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3dfc555..7215ebf 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -431,7 +431,7 @@ config ARCH_FOOTBRIDGE
select FOOTBRIDGE
select GENERIC_CLOCKEVENTS
select HAVE_IDE
- select NEED_MACH_IO_H
+ select NEED_MACH_IO_H if !MMU
select NEED_MACH_MEMORY_H
help
Support for systems based on the DC21285 companion chip
diff --git a/arch/arm/mach-footbridge/common.c b/arch/arm/mach-footbridge/common.c
index 3e6aaa6..8a739e0 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -26,6 +26,7 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
+#include <asm/mach/pci.h>
#include "common.h"
@@ -175,11 +176,6 @@ static struct map_desc ebsa285_host_io_desc[] __initdata = {
.pfn = __phys_to_pfn(DC21285_PCI_IACK),
.length = PCIIACK_SIZE,
.type = MT_DEVICE,
- }, {
- .virtual = PCIO_BASE,
- .pfn = __phys_to_pfn(DC21285_PCI_IO),
- .length = PCIO_SIZE,
- .type = MT_DEVICE,
},
#endif
};
@@ -196,8 +192,10 @@ void __init footbridge_map_io(void)
* Now, work out what we've got to map in addition on this
* platform.
*/
- if (footbridge_cfn_mode())
+ if (footbridge_cfn_mode()) {
+ pci_map_io_single(DC21285_PCI_IO);
iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
+ }
}
void footbridge_restart(char mode, const char *cmd)
diff --git a/arch/arm/mach-footbridge/include/mach/debug-macro.S b/arch/arm/mach-footbridge/include/mach/debug-macro.S
index e5acde2..c169f0c 100644
--- a/arch/arm/mach-footbridge/include/mach/debug-macro.S
+++ b/arch/arm/mach-footbridge/include/mach/debug-macro.S
@@ -17,7 +17,8 @@
/* For NetWinder debugging */
.macro addruart, rp, rv, tmp
mov \rp, #0x000003f8
- orr \rv, \rp, #0xff000000 @ virtual
+ orr \rv, \rp, #0xfe000000 @ virtual
+ orr \rv, \rv, #0x00e00000 @ virtual
orr \rp, \rp, #0x7c000000 @ physical
.endm
diff --git a/arch/arm/mach-footbridge/include/mach/io.h b/arch/arm/mach-footbridge/include/mach/io.h
index aba531ee..aba4638 100644
--- a/arch/arm/mach-footbridge/include/mach/io.h
+++ b/arch/arm/mach-footbridge/include/mach/io.h
@@ -14,18 +14,10 @@
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
-#ifdef CONFIG_MMU
-#define MMU_IO(a, b) (a)
-#else
-#define MMU_IO(a, b) (b)
-#endif
-
-#define PCIO_SIZE 0x00100000
-#define PCIO_BASE MMU_IO(0xff000000, 0x7c000000)
-
/*
- * Translation of various region addresses to virtual addresses
+ * Translation of various i/o addresses to host addresses for !CONFIG_MMU
*/
+#define PCIO_BASE 0x7c000000
#define __io(a) ((void __iomem *)(PCIO_BASE + (a)))
#endif
--
1.7.9.5
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