sh: Convert to asm-generic/irqflags.h.

This simplifies the irqflags support by switching over to the asm-generic
version. The necessary support functions are brought out-of-line for both
SHcompact and SHmedia instruction sets.

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

arch/sh/include/asm/irqflags.h

@@ -1,34 +1,9 @@
 #ifndef __ASM_SH_IRQFLAGS_H
 #define __ASM_SH_IRQFLAGS_H
 
-#ifdef CONFIG_SUPERH32
-#include "irqflags_32.h"
-#else
-#include "irqflags_64.h"
-#endif
+#define RAW_IRQ_DISABLED	0xf0
+#define RAW_IRQ_ENABLED		0x00
 
-#define raw_local_save_flags(flags) \
-		do { (flags) = __raw_local_save_flags(); } while (0)
-
-static inline int raw_irqs_disabled_flags(unsigned long flags)
-{
-	return (flags != 0);
-}
-
-static inline int raw_irqs_disabled(void)
-{
-	unsigned long flags = __raw_local_save_flags();
-
-	return raw_irqs_disabled_flags(flags);
-}
-
-#define raw_local_irq_save(flags) \
-		do { (flags) = __raw_local_irq_save(); } while (0)
-
-static inline void raw_local_irq_restore(unsigned long flags)
-{
-	if ((flags & 0xf0) != 0xf0)
-		raw_local_irq_enable();
-}
+#include <asm-generic/irqflags.h>
 
 #endif /* __ASM_SH_IRQFLAGS_H */

arch/sh/include/asm/system_32.h

@@ -232,4 +232,33 @@ asmlinkage void do_exception_error(unsigned long r4, unsigned long r5,
 				   unsigned long r6, unsigned long r7,
 				   struct pt_regs __regs);
 
+static inline void set_bl_bit(void)
+{
+	unsigned long __dummy0, __dummy1;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"or	%2, %0\n\t"
+		"and	%3, %0\n\t"
+		"ldc	%0, sr\n\t"
+		: "=&r" (__dummy0), "=r" (__dummy1)
+		: "r" (0x10000000), "r" (0xffffff0f)
+		: "memory"
+	);
+}
+
+static inline void clear_bl_bit(void)
+{
+	unsigned long __dummy0, __dummy1;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"and	%2, %0\n\t"
+		"ldc	%0, sr\n\t"
+		: "=&r" (__dummy0), "=r" (__dummy1)
+		: "1" (~0x10000000)
+		: "memory"
+	);
+}
+
 #endif /* __ASM_SH_SYSTEM_32_H */

arch/sh/include/asm/system_64.h

@@ -12,6 +12,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+#include <cpu/registers.h>
 #include <asm/processor.h>
 
 /*
@@ -47,4 +48,29 @@ static inline reg_size_t register_align(void *val)
 	return (unsigned long long)(signed long long)(signed long)val;
 }
 
+#define SR_BL_LL	0x0000000010000000LL
+
+static inline void set_bl_bit(void)
+{
+	unsigned long long __dummy0, __dummy1 = SR_BL_LL;
+
+	__asm__ __volatile__("getcon	" __SR ", %0\n\t"
+			     "or	%0, %1, %0\n\t"
+			     "putcon	%0, " __SR "\n\t"
+			     : "=&r" (__dummy0)
+			     : "r" (__dummy1));
+
+}
+
+static inline void clear_bl_bit(void)
+{
+	unsigned long long __dummy0, __dummy1 = ~SR_BL_LL;
+
+	__asm__ __volatile__("getcon	" __SR ", %0\n\t"
+			     "and	%0, %1, %0\n\t"
+			     "putcon	%0, " __SR "\n\t"
+			     : "=&r" (__dummy0)
+			     : "r" (__dummy1));
+}
+
 #endif /* __ASM_SH_SYSTEM_64_H */

arch/sh/kernel/Makefile

@@ -12,8 +12,8 @@ endif
 CFLAGS_REMOVE_return_address.o = -pg
 
 obj-y	:= debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o	\
-	   machvec.o nmi_debug.o process_$(BITS).o ptrace_$(BITS).o	\
-	   return_address.o						\
+	   irq_$(BITS).o machvec.o nmi_debug.o process_$(BITS).o 	\
+	   ptrace_$(BITS).o return_address.o				\
 	   setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o		\
 	   syscalls_$(BITS).o time.o topology.o traps.o			\
 	   traps_$(BITS).o unwinder.o

arch/sh/kernel/irq_32.c

@@ -0,0 +1,57 @@
+/*
+ * SHcompact irqflags support
+ *
+ * Copyright (C) 2006 - 2009 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.
+ */
+#include <linux/irqflags.h>
+#include <linux/module.h>
+
+void raw_local_irq_restore(unsigned long flags)
+{
+	unsigned long __dummy0, __dummy1;
+
+	if (flags == RAW_IRQ_DISABLED) {
+		__asm__ __volatile__ (
+			"stc	sr, %0\n\t"
+			"or	#0xf0, %0\n\t"
+			"ldc	%0, sr\n\t"
+			: "=&z" (__dummy0)
+			: /* no inputs */
+			: "memory"
+		);
+	} else {
+		__asm__ __volatile__ (
+			"stc	sr, %0\n\t"
+			"and	%1, %0\n\t"
+#ifdef CONFIG_CPU_HAS_SR_RB
+			"stc	r6_bank, %1\n\t"
+			"or	%1, %0\n\t"
+#endif
+			"ldc	%0, sr\n\t"
+			: "=&r" (__dummy0), "=r" (__dummy1)
+			: "1" (~RAW_IRQ_DISABLED)
+			: "memory"
+		);
+	}
+}
+EXPORT_SYMBOL(raw_local_irq_restore);
+
+unsigned long __raw_local_save_flags(void)
+{
+	unsigned long flags;
+
+	__asm__ __volatile__ (
+		"stc	sr, %0\n\t"
+		"and	#0xf0, %0\n\t"
+		: "=&z" (flags)
+		: /* no inputs */
+		: "memory"
+	);
+
+	return flags;
+}
+EXPORT_SYMBOL(__raw_local_save_flags);