From f1517494407b1f1ca0063a756cc30d75e96d433c Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 27 Sep 2006 16:01:12 +0900 Subject: sh: Cleanup and document register bank usage. Initial register bank cleanup. Make SR.RB configurable, and add some preliminary documentation on register bank usage within the kernel. Signed-off-by: Paul Mundt --- include/asm-sh/system.h | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'include/asm-sh/system.h') diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h index 1630a5411e5..198d17e3069 100644 --- a/include/asm-sh/system.h +++ b/include/asm-sh/system.h @@ -136,7 +136,8 @@ extern void __xchg_called_with_bad_pointer(void); #define set_mb(var, value) do { xchg(&var, value); } while (0) /* Interrupt Control */ -static __inline__ void local_irq_enable(void) +#ifdef CONFIG_CPU_HAS_SR_RB +static inline void local_irq_enable(void) { unsigned long __dummy0, __dummy1; @@ -149,6 +150,20 @@ static __inline__ void local_irq_enable(void) : "1" (~0x000000f0) : "memory"); } +#else +static inline void local_irq_enable(void) +{ + unsigned long __dummy0, __dummy1; + + __asm__ __volatile__ ( + "stc sr, %0\n\t" + "and %1, %0\n\t" + "ldc %0, sr\n\t" + : "=&r" (__dummy0), "=r" (__dummy1) + : "1" (~0x000000f0) + : "memory"); +} +#endif static __inline__ void local_irq_disable(void) { -- cgit v1.2.3