1 files changed, 53 insertions, 0 deletions
diff --git a/arch/sh/include/asm/addrspace.h b/arch/sh/include/asm/addrspace.h
new file mode 100644
index 000000000000..2702d81bfc0d
--- /dev/null
+++ b/arch/sh/include/asm/addrspace.h
@@ -0,0 +1,53 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1999 by Kaz Kojima
+ *
+ * Defitions for the address spaces of the SH CPUs.
+ */
+#ifndef __ASM_SH_ADDRSPACE_H
+#define __ASM_SH_ADDRSPACE_H
+
+#ifdef __KERNEL__
+
+#include <cpu/addrspace.h>
+
+/* If this CPU supports segmentation, hook up the helpers */
+#ifdef P1SEG
+
+/*
+   [ P0/U0 (virtual) ]		0x00000000     <------ User space
+   [ P1 (fixed)   cached ]	0x80000000     <------ Kernel space
+   [ P2 (fixed)  non-cachable]	0xA0000000     <------ Physical access
+   [ P3 (virtual) cached]	0xC0000000     <------ vmalloced area
+   [ P4 control   ]		0xE0000000
+ */
+
+/* Returns the privileged segment base of a given address  */
+#define PXSEG(a)	(((unsigned long)(a)) & 0xe0000000)
+
+/* Returns the physical address of a PnSEG (n=1,2) address   */
+#define PHYSADDR(a)	(((unsigned long)(a)) & 0x1fffffff)
+
+#ifdef CONFIG_29BIT
+/*
+ * Map an address to a certain privileged segment
+ */
+#define P1SEGADDR(a)	\
+	((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P1SEG))
+#define P2SEGADDR(a)	\
+	((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P2SEG))
+#define P3SEGADDR(a)	\
+	((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P3SEG))
+#define P4SEGADDR(a)	\
+	((__typeof__(a))(((unsigned long)(a) & 0x1fffffff) | P4SEG))
+#endif /* 29BIT */
+#endif /* P1SEG */
+
+/* Check if an address can be reached in 29 bits */
+#define IS_29BIT(a)	(((unsigned long)(a)) < 0x20000000)
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_SH_ADDRSPACE_H */