sh: Split out system.h in to _32 and _64 variants.

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

3 files changed, 144 insertions, 89 deletions

diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index 288abeb..0cfa96a 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -12,60 +12,9 @@
 #include <asm/types.h>
 #include <asm/ptrace.h>
 
-struct task_struct *__switch_to(struct task_struct *prev,
-				struct task_struct *next);
-
 #define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */
-/*
- *	switch_to() should switch tasks to task nr n, first
- */
-
-#define switch_to(prev, next, last) do {				\
- struct task_struct *__last;						\
- register unsigned long *__ts1 __asm__ ("r1") = &prev->thread.sp;	\
- register unsigned long *__ts2 __asm__ ("r2") = &prev->thread.pc;	\
- register unsigned long *__ts4 __asm__ ("r4") = (unsigned long *)prev;	\
- register unsigned long *__ts5 __asm__ ("r5") = (unsigned long *)next;	\
- register unsigned long *__ts6 __asm__ ("r6") = &next->thread.sp;	\
- register unsigned long __ts7 __asm__ ("r7") = next->thread.pc;		\
- __asm__ __volatile__ (".balign 4\n\t" 					\
-		       "stc.l	gbr, @-r15\n\t" 			\
-		       "sts.l	pr, @-r15\n\t" 				\
-		       "mov.l	r8, @-r15\n\t" 				\
-		       "mov.l	r9, @-r15\n\t" 				\
-		       "mov.l	r10, @-r15\n\t" 			\
-		       "mov.l	r11, @-r15\n\t" 			\
-		       "mov.l	r12, @-r15\n\t" 			\
-		       "mov.l	r13, @-r15\n\t" 			\
-		       "mov.l	r14, @-r15\n\t" 			\
-		       "mov.l	r15, @r1	! save SP\n\t"		\
-		       "mov.l	@r6, r15	! change to new stack\n\t" \
-		       "mova	1f, %0\n\t" 				\
-		       "mov.l	%0, @r2		! save PC\n\t" 		\
-		       "mov.l	2f, %0\n\t" 				\
-		       "jmp	@%0		! call __switch_to\n\t" \
-		       " lds	r7, pr		!  with return to new PC\n\t" \
-		       ".balign	4\n"					\
-		       "2:\n\t"						\
-		       ".long	__switch_to\n"				\
-		       "1:\n\t"						\
-		       "mov.l	@r15+, r14\n\t"				\
-		       "mov.l	@r15+, r13\n\t"				\
-		       "mov.l	@r15+, r12\n\t"				\
-		       "mov.l	@r15+, r11\n\t"				\
-		       "mov.l	@r15+, r10\n\t"				\
-		       "mov.l	@r15+, r9\n\t"				\
-		       "mov.l	@r15+, r8\n\t"				\
-		       "lds.l	@r15+, pr\n\t"				\
-		       "ldc.l	@r15+, gbr\n\t"				\
-		       : "=z" (__last)					\
-		       : "r" (__ts1), "r" (__ts2), "r" (__ts4), 	\
-			 "r" (__ts5), "r" (__ts6), "r" (__ts7) 		\
-		       : "r3", "t");					\
-	last = __last;							\
-} while (0)
 
-#ifdef CONFIG_CPU_SH4A
+#if defined(CONFIG_CPU_SH4A) || defined(CONFIG_CPU_SH5)
 #define __icbi()			\
 {					\
 	unsigned long __addr;		\
@@ -91,7 +40,7 @@ struct task_struct *__switch_to(struct task_struct *prev,
  * Historically we have only done this type of barrier for the MMUCR, but
  * it's also necessary for the CCR, so we make it generic here instead.
  */
-#ifdef CONFIG_CPU_SH4A
+#if defined(CONFIG_CPU_SH4A) || defined(CONFIG_CPU_SH5)
 #define mb()		__asm__ __volatile__ ("synco": : :"memory")
 #define rmb()		mb()
 #define wmb()		__asm__ __volatile__ ("synco": : :"memory")
@@ -119,42 +68,6 @@ struct task_struct *__switch_to(struct task_struct *prev,
 
 #define set_mb(var, value) do { (void)xchg(&var, value); } while (0)
 
-/*
- * Jump to P2 area.
- * When handling TLB or caches, we need to do it from P2 area.
- */
-#define jump_to_P2()			\
-do {					\
-	unsigned long __dummy;		\
-	__asm__ __volatile__(		\
-		"mov.l	1f, %0\n\t"	\
-		"or	%1, %0\n\t"	\
-		"jmp	@%0\n\t"	\
-		" nop\n\t" 		\
-		".balign 4\n"		\
-		"1:	.long 2f\n"	\
-		"2:"			\
-		: "=&r" (__dummy)	\
-		: "r" (0x20000000));	\
-} while (0)
-
-/*
- * Back to P1 area.
- */
-#define back_to_P1()					\
-do {							\
-	unsigned long __dummy;				\
-	ctrl_barrier();					\
-	__asm__ __volatile__(				\
-		"mov.l	1f, %0\n\t"			\
-		"jmp	@%0\n\t"			\
-		" nop\n\t"				\
-		".balign 4\n"				\
-		"1:	.long 2f\n"			\
-		"2:"					\
-		: "=&r" (__dummy));			\
-} while (0)
-
 static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
 {
 	unsigned long flags, retval;
@@ -281,4 +194,10 @@ asmlinkage void bug_trap_handler(unsigned long r4, unsigned long r5,
 
 #define arch_align_stack(x) (x)
 
+#ifdef CONFIG_SUPERH32
+# include "system_32.h"
+#else
+# include "system_64.h"
+#endif
+
 #endif
diff --git a/include/asm-sh/system_32.h b/include/asm-sh/system_32.h
new file mode 100644
index 0000000..ad37e8d
--- /dev/null
+++ b/include/asm-sh/system_32.h
@@ -0,0 +1,97 @@
+#ifndef __ASM_SH_SYSTEM_32_H
+#define __ASM_SH_SYSTEM_32_H
+
+#include <linux/types.h>
+
+struct task_struct *__switch_to(struct task_struct *prev,
+				struct task_struct *next);
+
+/*
+ *	switch_to() should switch tasks to task nr n, first
+ */
+#define switch_to(prev, next, last)				\
+do {								\
+	register u32 *__ts1 __asm__ ("r1") = &prev->thread.sp;	\
+	register u32 *__ts2 __asm__ ("r2") = &prev->thread.pc;	\
+	register u32 *__ts4 __asm__ ("r4") = (u32 *)prev;	\
+	register u32 *__ts5 __asm__ ("r5") = (u32 *)next;	\
+	register u32 *__ts6 __asm__ ("r6") = &next->thread.sp;	\
+	register u32 __ts7 __asm__ ("r7") = next->thread.pc;	\
+	struct task_struct *__last;				\
+								\
+	__asm__ __volatile__ (					\
+		".balign 4\n\t"					\
+		"stc.l	gbr, @-r15\n\t"				\
+		"sts.l	pr, @-r15\n\t"				\
+		"mov.l	r8, @-r15\n\t"				\
+		"mov.l	r9, @-r15\n\t"				\
+		"mov.l	r10, @-r15\n\t"				\
+		"mov.l	r11, @-r15\n\t"				\
+		"mov.l	r12, @-r15\n\t"				\
+		"mov.l	r13, @-r15\n\t"				\
+		"mov.l	r14, @-r15\n\t"				\
+		"mov.l	r15, @r1\t! save SP\n\t"		\
+		"mov.l	@r6, r15\t! change to new stack\n\t"	\
+		"mova	1f, %0\n\t"				\
+		"mov.l	%0, @r2\t! save PC\n\t"			\
+		"mov.l	2f, %0\n\t"				\
+		"jmp	@%0\t! call __switch_to\n\t"		\
+		" lds	r7, pr\t!  with return to new PC\n\t"	\
+		".balign	4\n"				\
+		"2:\n\t"					\
+		".long	__switch_to\n"				\
+		"1:\n\t"					\
+		"mov.l	@r15+, r14\n\t"				\
+		"mov.l	@r15+, r13\n\t"				\
+		"mov.l	@r15+, r12\n\t"				\
+		"mov.l	@r15+, r11\n\t"				\
+		"mov.l	@r15+, r10\n\t"				\
+		"mov.l	@r15+, r9\n\t"				\
+		"mov.l	@r15+, r8\n\t"				\
+		"lds.l	@r15+, pr\n\t"				\
+		"ldc.l	@r15+, gbr\n\t"				\
+		: "=z" (__last)					\
+		: "r" (__ts1), "r" (__ts2), "r" (__ts4),	\
+		  "r" (__ts5), "r" (__ts6), "r" (__ts7)		\
+		: "r3", "t");					\
+								\
+	last = __last;						\
+} while (0)
+
+/*
+ * Jump to P2 area.
+ * When handling TLB or caches, we need to do it from P2 area.
+ */
+#define jump_to_P2()			\
+do {					\
+	unsigned long __dummy;		\
+	__asm__ __volatile__(		\
+		"mov.l	1f, %0\n\t"	\
+		"or	%1, %0\n\t"	\
+		"jmp	@%0\n\t"	\
+		" nop\n\t"		\
+		".balign 4\n"		\
+		"1:	.long 2f\n"	\
+		"2:"			\
+		: "=&r" (__dummy)	\
+		: "r" (0x20000000));	\
+} while (0)
+
+/*
+ * Back to P1 area.
+ */
+#define back_to_P1()					\
+do {							\
+	unsigned long __dummy;				\
+	ctrl_barrier();					\
+	__asm__ __volatile__(				\
+		"mov.l	1f, %0\n\t"			\
+		"jmp	@%0\n\t"			\
+		" nop\n\t"				\
+		".balign 4\n"				\
+		"1:	.long 2f\n"			\
+		"2:"					\
+		: "=&r" (__dummy));			\
+} while (0)
+
+#endif /* __ASM_SH_SYSTEM_32_H */
diff --git a/include/asm-sh/system_64.h b/include/asm-sh/system_64.h
new file mode 100644
index 0000000..0e466e9
--- /dev/null
+++ b/include/asm-sh/system_64.h
@@ -0,0 +1,39 @@
+#ifndef __ASM_SH_SYSTEM_64_H
+#define __ASM_SH_SYSTEM_64_H
+
+/*
+ * include/asm-sh/system_64.h
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003  Paul Mundt
+ * Copyright (C) 2004  Richard Curnow
+ *
+ * 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.
+ */
+#include <asm/processor.h>
+
+/*
+ *	switch_to() should switch tasks to task nr n, first
+ */
+struct task_struct *sh64_switch_to(struct task_struct *prev,
+				   struct thread_struct *prev_thread,
+				   struct task_struct *next,
+				   struct thread_struct *next_thread);
+
+#define switch_to(prev,next,last)				\
+do {								\
+	if (last_task_used_math != next) {			\
+		struct pt_regs *regs = next->thread.uregs;	\
+		if (regs) regs->sr |= SR_FD;			\
+	}							\
+	last = sh64_switch_to(prev, &prev->thread, next,	\
+			      &next->thread);			\
+} while (0)
+
+/* No segmentation.. */
+#define jump_to_P2()	do { } while (0)
+#define back_to_P1()	do { } while (0)
+
+#endif /* __ASM_SH_SYSTEM_64_H */