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| author | Paul Mundt | 2006-09-27 09:01:12 +0200 |
|---|---|---|
| committer | Paul Mundt | 2006-09-27 09:01:12 +0200 |
| commit | f1517494407b1f1ca0063a756cc30d75e96d433c (patch) | |
| tree | fe7827210e76750687de601e6b0695a4e4e16fa7 /include/asm-sh/system.h | |
| parent | sh: Add support for R7780RP and R7780MP boards. (diff) | |
| download | kernel-qcow2-linux-f1517494407b1f1ca0063a756cc30d75e96d433c.tar.gz kernel-qcow2-linux-f1517494407b1f1ca0063a756cc30d75e96d433c.tar.xz kernel-qcow2-linux-f1517494407b1f1ca0063a756cc30d75e96d433c.zip | |
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 <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/system.h')
| -rw-r--r-- | include/asm-sh/system.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h index 1630a5411e5f..198d17e3069a 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) { |