1 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa-regs.h b/arch/arm/mach-pxa/pxa-regs.h
new file mode 100644
index 000000000..ba5120c06
--- /dev/null
+++ b/arch/arm/mach-pxa/pxa-regs.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ *  Author:	Nicolas Pitre
+ *  Created:	Jun 15, 2001
+ *  Copyright:	MontaVista Software Inc.
+ */
+#ifndef __ASM_MACH_PXA_REGS_H
+#define __ASM_MACH_PXA_REGS_H
+
+/*
+ * Workarounds for at least 2 errata so far require this.
+ * The mapping is set in mach-pxa/generic.c.
+ */
+#define UNCACHED_PHYS_0		0xfe000000
+#define UNCACHED_PHYS_0_SIZE	0x00100000
+
+/*
+ * Intel PXA2xx internal register mapping:
+ *
+ * 0x40000000 - 0x41ffffff <--> 0xf2000000 - 0xf3ffffff
+ * 0x44000000 - 0x45ffffff <--> 0xf4000000 - 0xf5ffffff
+ * 0x48000000 - 0x49ffffff <--> 0xf6000000 - 0xf7ffffff
+ * 0x4c000000 - 0x4dffffff <--> 0xf8000000 - 0xf9ffffff
+ * 0x50000000 - 0x51ffffff <--> 0xfa000000 - 0xfbffffff
+ * 0x54000000 - 0x55ffffff <--> 0xfc000000 - 0xfdffffff
+ * 0x58000000 - 0x59ffffff <--> 0xfe000000 - 0xffffffff
+ *
+ * Note that not all PXA2xx chips implement all those addresses, and the
+ * kernel only maps the minimum needed range of this mapping.
+ */
+#define io_v2p(x) (0x3c000000 + ((x) & 0x01ffffff) + (((x) & 0x0e000000) << 1))
+#define io_p2v(x) IOMEM(0xf2000000 + ((x) & 0x01ffffff) + (((x) & 0x1c000000) >> 1))
+
+#ifndef __ASSEMBLY__
+# define __REG(x)	(*((volatile u32 __iomem *)io_p2v(x)))
+
+/* With indexed regs we don't want to feed the index through io_p2v()
+   especially if it is a variable, otherwise horrible code will result. */
+# define __REG2(x,y)	\
+	(*(volatile u32 __iomem*)((u32)&__REG(x) + (y)))
+
+# define __PREG(x)	(io_v2p((u32)&(x)))
+
+#else
+
+# define __REG(x)	io_p2v(x)
+# define __PREG(x)	io_v2p(x)
+
+#endif
+
+
+#endif