sh: Provide common CPU headers, prune the SH-2 and SH-2A directories.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/Makefile

@@ -91,7 +91,6 @@ LDFLAGS_vmlinux		+= --defsym 'jiffies=jiffies_64+4'
 LDFLAGS			+= -EB
 endif
 
-
 head-y			:= arch/sh/kernel/init_task.o
 head-$(CONFIG_SUPERH32)	+= arch/sh/kernel/head_32.o
 head-$(CONFIG_SUPERH64)	+= arch/sh/kernel/head_64.o
@@ -134,11 +133,22 @@ endif
 # Companion chips
 core-$(CONFIG_HD6446X_SERIES)	+= arch/sh/cchips/hd6446x/
 
-cpuincdir-$(CONFIG_CPU_SH2)	:= cpu-sh2
-cpuincdir-$(CONFIG_CPU_SH2A)	:= cpu-sh2a
-cpuincdir-$(CONFIG_CPU_SH3)	:= cpu-sh3
-cpuincdir-$(CONFIG_CPU_SH4)	:= cpu-sh4
-cpuincdir-$(CONFIG_CPU_SH5)	:= cpu-sh5
+#
+# CPU header paths
+#
+# These are ordered by optimization level. A CPU family that is a subset
+# of another (ie, SH-2A / SH-2), is picked up first, with increasing
+# levels of genericness if nothing more suitable is situated in the
+# hierarchy.
+#
+# As an example, in order of preference, SH-2A > SH-2 > common definitions.
+#
+cpuincdir-$(CONFIG_CPU_SH2A)	+= cpu-sh2a
+cpuincdir-$(CONFIG_CPU_SH2)	+= cpu-sh2
+cpuincdir-$(CONFIG_CPU_SH3)	+= cpu-sh3
+cpuincdir-$(CONFIG_CPU_SH4)	+= cpu-sh4
+cpuincdir-$(CONFIG_CPU_SH5)	+= cpu-sh5
+cpuincdir-y			+= cpu-common	# Must be last
 
 libs-$(CONFIG_SUPERH32)		:= arch/sh/lib/	$(libs-y)
 libs-$(CONFIG_SUPERH64)		:= arch/sh/lib64/ $(libs-y)
@@ -149,8 +159,8 @@ drivers-$(CONFIG_OPROFILE)	+= arch/sh/oprofile/
 
 boot := arch/sh/boot
 
-cflags-y	+= -Iarch/sh/include/$(cpuincdir-y)
-cflags-y	+= $(foreach d, $(machdir-y), -Iarch/sh/include/$(d))
+cflags-y	+= $(foreach d, $(cpuincdir-y), -Iarch/sh/include/$(d)) \
+		   $(foreach d, $(machdir-y), -Iarch/sh/include/$(d))
 
 KBUILD_CFLAGS		+= -pipe $(cflags-y)
 KBUILD_CPPFLAGS		+= $(cflags-y)

arch/sh/include/cpu-sh2/cpu/cacheflush.h → arch/sh/include/cpu-common/cpu/cacheflush.h

@@ -10,7 +10,7 @@
 #ifndef __ASM_CPU_SH2_CACHEFLUSH_H
 #define __ASM_CPU_SH2_CACHEFLUSH_H
 
-/* 
+/*
  * Cache flushing:
  *
  *  - flush_cache_all() flushes entire cache
@@ -40,5 +40,5 @@
 #define flush_cache_sigtramp(vaddr)		do { } while (0)
 
 #define p3_cache_init()				do { } while (0)
-#endif /* __ASM_CPU_SH2_CACHEFLUSH_H */
 
+#endif /* __ASM_CPU_SH2_CACHEFLUSH_H */

arch/sh/include/cpu-sh2a/cpu/dma.h

@@ -1,23 +1 @@
-/*
- * Definitions for the SH-2 DMAC.
- *
- * Copyright (C) 2003  Paul Mundt
- *
- * 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.
- */
-#ifndef __ASM_CPU_SH2_DMA_H
-#define __ASM_CPU_SH2_DMA_H
-
-#define SH_MAX_DMA_CHANNELS	2
-
-#define SAR	((unsigned long[]){ 0xffffff80, 0xffffff90 })
-#define DAR	((unsigned long[]){ 0xffffff84, 0xffffff94 })
-#define DMATCR	((unsigned long[]){ 0xffffff88, 0xffffff98 })
-#define CHCR	((unsigned long[]){ 0xfffffffc, 0xffffff9c })
-
-#define DMAOR	0xffffffb0
-
-#endif /* __ASM_CPU_SH2_DMA_H */
-
+#include <cpu-sh2/cpu/dma.h>

arch/sh/include/cpu-sh2a/cpu/ubc.h

@@ -1,32 +1 @@
-/*
- * include/asm-sh/cpu-sh2/ubc.h
- *
- * Copyright (C) 2003 Paul Mundt
- *
- * 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.
- */
-#ifndef __ASM_CPU_SH2_UBC_H
-#define __ASM_CPU_SH2_UBC_H
-
-#define UBC_BARA                0xffffff40
-#define UBC_BAMRA               0xffffff44
-#define UBC_BBRA                0xffffff48
-#define UBC_BARB                0xffffff60
-#define UBC_BAMRB               0xffffff64
-#define UBC_BBRB                0xffffff68
-#define UBC_BDRB                0xffffff70
-#define UBC_BDMRB               0xffffff74
-#define UBC_BRCR                0xffffff78
-
-/*
- * We don't have any ASID changes to make in the UBC on the SH-2.
- *
- * Make these purposely invalid to track misuse.
- */
-#define UBC_BASRA		0x00000000
-#define UBC_BASRB		0x00000000
-
-#endif /* __ASM_CPU_SH2_UBC_H */
-
+#include <cpu-sh2/cpu/ubc.h>

arch/sh/include/cpu-sh2a/cpu/watchdog.h

@@ -1,69 +1 @@
-/*
- * include/asm-sh/cpu-sh2/watchdog.h
- *
- * Copyright (C) 2002, 2003 Paul Mundt
- *
- * 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.
- */
-#ifndef __ASM_CPU_SH2_WATCHDOG_H
-#define __ASM_CPU_SH2_WATCHDOG_H
-
-/*
- * More SH-2 brilliance .. its not good enough that we can't read
- * and write the same sizes to WTCNT, now we have to read and write
- * with different sizes at different addresses for WTCNT _and_ RSTCSR.
- *
- * At least on the bright side no one has managed to screw over WTCSR
- * in this fashion .. yet.
- */
-/* Register definitions */
-#define WTCNT		0xfffffe80
-#define WTCSR		0xfffffe80
-#define RSTCSR		0xfffffe82
-
-#define WTCNT_R		(WTCNT + 1)
-#define RSTCSR_R	(RSTCSR + 1)
-
-/* Bit definitions */
-#define WTCSR_IOVF	0x80
-#define WTCSR_WT	0x40
-#define WTCSR_TME	0x20
-#define WTCSR_RSTS	0x00
-
-#define RSTCSR_RSTS	0x20
-
-/**
- * 	sh_wdt_read_rstcsr - Read from Reset Control/Status Register
- *
- *	Reads back the RSTCSR value.
- */
-static inline __u8 sh_wdt_read_rstcsr(void)
-{
-	/*
-	 * Same read/write brain-damage as for WTCNT here..
-	 */
-	return ctrl_inb(RSTCSR_R);
-}
-
-/**
- * 	sh_wdt_write_csr - Write to Reset Control/Status Register
- *
- * 	@val: Value to write
- *
- * 	Writes the given value @val to the lower byte of the control/status
- * 	register. The upper byte is set manually on each write.
- */
-static inline void sh_wdt_write_rstcsr(__u8 val)
-{
-	/*
-	 * Note: Due to the brain-damaged nature of this register,
-	 * we can't presently touch the WOVF bit, since the upper byte
-	 * has to be swapped for this. So just leave it alone..
-	 */
-	ctrl_outw((WTCNT_HIGH << 8) | (__u16)val, RSTCSR);
-}
-
-#endif /* __ASM_CPU_SH2_WATCHDOG_H */
-
+#include <cpu-sh2/cpu/watchdog.h>