From d286a43aa248cb657e0876b5aa4fe0034170d05c Mon Sep 17 00:00:00 2001
From: =?utf8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
Date: Sat, 2 Apr 2011 00:15:49 +0200
Subject: [PATCH] ARM: mx3: make ioremap quirk ready for multi-SoC kernels
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To be able to compile e.g. i.MX31 and i.MX51 in a single kernel image
the ioremap quirk needs a runtime check.
While touching this code make the comment more understandable by adding
a sentence from the commit log that introduced it
(eadefef ([ARM] MX3: Use ioremap wrapper to map SoC devices nonshared)).
As mach/io.h now uses cpu_is_ some header reshuffling in mach/hardware.h
was necessary. (mach/mx27.h and mach/mx31.h #include <linux/io.h> which
#includes <mach/io.h>. So mach/mxc.h which provides the cpu_is_ macros
needs to be included before mach/mx27.h and mach/mx31.h.)
LAKML-Reference: 1302464943-20721-5-git-send-email-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
arch/arm/plat-mxc/include/mach/hardware.h | 4 ++--
arch/arm/plat-mxc/include/mach/io.h | 23 +++++++++++++++--------
2 files changed, 17 insertions(+), 10 deletions(-)
diff --git a/arch/arm/plat-mxc/include/mach/hardware.h b/arch/arm/plat-mxc/include/mach/hardware.h
index a881db5c395e..67d3e2bed065 100644
--- a/arch/arm/plat-mxc/include/mach/hardware.h
+++ b/arch/arm/plat-mxc/include/mach/hardware.h
@@ -95,6 +95,8 @@
#define IMX_IO_ADDRESS(x) IOMEM(IMX_IO_P2V(x))
+#include <mach/mxc.h>
+
#ifdef CONFIG_ARCH_MX5
#include <mach/mx50.h>
#include <mach/mx51.h>
@@ -125,8 +127,6 @@
# include <mach/mx25.h>
#endif
-#include <mach/mxc.h>
-
#define imx_map_entry(soc, name, _type) { \
.virtual = soc ## _IO_P2V(soc ## _ ## name ## _BASE_ADDR), \
.pfn = __phys_to_pfn(soc ## _ ## name ## _BASE_ADDR), \
diff --git a/arch/arm/plat-mxc/include/mach/io.h b/arch/arm/plat-mxc/include/mach/io.h
index b4f2de769466..4347a87d2bb0 100644
--- a/arch/arm/plat-mxc/include/mach/io.h
+++ b/arch/arm/plat-mxc/include/mach/io.h
@@ -14,19 +14,26 @@
/* Allow IO space to be anywhere in the memory */
#define IO_SPACE_LIMIT 0xffffffff
-#ifdef CONFIG_ARCH_MX3
-#define __arch_ioremap __mx3_ioremap
+#if defined(CONFIG_SOC_IMX31) || defined(CONFIG_SOC_IMX35)
+#include <mach/hardware.h>
+
+#define __arch_ioremap __imx_ioremap
#define __arch_iounmap __iounmap
+#define addr_in_module(addr, mod) \
+ ((unsigned long)(addr) - mod ## _BASE_ADDR < mod ## _SIZE)
+
static inline void __iomem *
-__mx3_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
+__imx_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
{
- if (mtype == MT_DEVICE) {
- /* Access all peripherals below 0x80000000 as nonshared device
- * but leave l2cc alone.
+ if (mtype == MT_DEVICE && (cpu_is_mx31() || cpu_is_mx35())) {
+ /*
+ * Access all peripherals below 0x80000000 as nonshared device
+ * on mx3, but leave l2cc alone. Otherwise cache corruptions
+ * can occur.
*/
- if ((phys_addr < 0x80000000) && ((phys_addr < 0x30000000) ||
- (phys_addr >= 0x30000000 + SZ_1M)))
+ if (phys_addr < 0x80000000 &&
+ !addr_in_module(phys_addr, MX3x_L2CC))
mtype = MT_DEVICE_NONSHARED;
}
--
2.34.1