ARM: imx: change static io mapping to use a function

Now only the virtual addresses [0xf4000000, 0xf5ffffff] are used for
static per-SoC mappings.  The few mappings of whole chip selects are
moved accordingly.

The now wrong defines for virtual base addresses are removed.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 67 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/include/mach/hardware.h b/arch/arm/plat-mxc/include/mach/hardware.h
index 409cec6223df..dde777c10176 100644
--- a/arch/arm/plat-mxc/include/mach/hardware.h
+++ b/arch/arm/plat-mxc/include/mach/hardware.h
@@ -32,6 +32,73 @@
 	(((addr) - module ## _BASE_ADDR) < module ## _SIZE ?		\
 	 (addr) - (module ## _BASE_ADDR) + (module ## _BASE_ADDR_VIRT) : 0)
 
+/*
+ * This is rather complicated for humans and ugly to verify, but for a machine
+ * it's OK.  Still more as it is usually only applied to constants.  The upsides
+ * on using this approach are:
+ *
+ *  - same mapping on all i.MX machines
+ *  - works for assembler, too
+ *  - no need to nurture #defines for virtual addresses
+ *
+ * The downside it, it's hard to verify (but I have a script for that).
+ *
+ * Obviously this needs to be injective for each SoC.  In general it maps the
+ * whole address space to [0xf4000000, 0xf5ffffff].  So [0xf6000000,0xfeffffff]
+ * is free for per-machine use (e.g. KZM_ARM11_01 uses 64MiB there).
+ *
+ * It applies the following mappings for the different SoCs:
+ *
+ * mx1:
+ *	IO	0x00200000+0x100000	->	0xf4000000+0x100000
+ * mx21:
+ *	AIPI	0x10000000+0x100000	->	0xf4400000+0x100000
+ *	SAHB1	0x80000000+0x100000	->	0xf4000000+0x100000
+ *	X_MEMC	0xdf000000+0x004000	->	0xf5f00000+0x004000
+ * mx25:
+ *	AIPS1	0x43f00000+0x100000	->	0xf5300000+0x100000
+ *	AIPS2	0x53f00000+0x100000	->	0xf5700000+0x100000
+ *	AVIC	0x68000000+0x100000	->	0xf5800000+0x100000
+ * mx27:
+ *	AIPI	0x10000000+0x100000	->	0xf4400000+0x100000
+ *	SAHB1	0x80000000+0x100000	->	0xf4000000+0x100000
+ *	X_MEMC	0xd8000000+0x100000	->	0xf5c00000+0x100000
+ * mx31:
+ *	AIPS1	0x43f00000+0x100000	->	0xf5300000+0x100000
+ *	AIPS2	0x53f00000+0x100000	->	0xf5700000+0x100000
+ *	AVIC	0x68000000+0x100000	->	0xf5800000+0x100000
+ *	X_MEMC	0xb8000000+0x010000	->	0xf4c00000+0x010000
+ *	SPBA0	0x50000000+0x100000	->	0xf5400000+0x100000
+ * mx35:
+ *	AIPS1	0x43f00000+0x100000	->	0xf5300000+0x100000
+ *	AIPS2	0x53f00000+0x100000	->	0xf5700000+0x100000
+ *	AVIC	0x68000000+0x100000	->	0xf5800000+0x100000
+ *	X_MEMC	0xb8000000+0x010000	->	0xf4c00000+0x010000
+ *	SPBA0	0x50000000+0x100000	->	0xf5400000+0x100000
+ * mx51:
+ *	IRAM	0x1ffe0000+0x020000	->	0xf4fe0000+0x020000
+ *	DEBUG	0x60000000+0x100000	->	0xf5000000+0x100000
+ *	SPBA0	0x70000000+0x100000	->	0xf5400000+0x100000
+ *	AIPS1	0x73f00000+0x100000	->	0xf5700000+0x100000
+ *	AIPS2	0x83f00000+0x100000	->	0xf4300000+0x100000
+ * mxc91231:
+ *	L2CC	0x30000000+0x010000	->	0xf4400000+0x010000
+ *	X_MEMC	0xb8000000+0x010000	->	0xf4c00000+0x010000
+ *	ROMP	0x60000000+0x010000	->	0xf5000000+0x010000
+ *	AVIC	0x68000000+0x010000	->	0xf5800000+0x010000
+ *	AIPS1	0x43f00000+0x100000	->	0xf5300000+0x100000
+ *	SPBA0	0x50000000+0x100000	->	0xf5400000+0x100000
+ *	SPBA1	0x52000000+0x100000	->	0xf5600000+0x100000
+ *	AIPS2	0x53f00000+0x100000	->	0xf5700000+0x100000
+ */
+#define IMX_IO_P2V(x)	(						\
+			0xf4000000 +					\
+			(((x) & 0x50000000) >> 6) +			\
+			(((x) & 0x0b000000) >> 4) +			\
+			(((x) & 0x000fffff)))
+
+#define IMX_IO_ADDRESS(x)	IOMEM(IMX_IO_P2V(x))
+
 #ifdef CONFIG_ARCH_MX5
 #include <mach/mx51.h>
 #endif