diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-01 09:51:51 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-01 09:51:51 -0700 |
commit | 0242909a6135e10a28822c64f9ad50fdad52757c (patch) | |
tree | c5f9c8abe95a65433e6ac356871f2379c02488fe /arch/cris/include/arch-v32/arch/system.h | |
parent | 0a6d2fac615972142715d736289abeeb7382e81d (diff) | |
parent | 556dcee7b829e5c350c3ffdbdb87a8b15aa3c5d3 (diff) |
Merge branch 'cris_move' of git://www.jni.nu/cris
* 'cris_move' of git://www.jni.nu/cris:
[CRIS] Move header files from include to arch/cris/include.
[CRISv32] Remove warning in io.h
Diffstat (limited to 'arch/cris/include/arch-v32/arch/system.h')
-rw-r--r-- | arch/cris/include/arch-v32/arch/system.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/cris/include/arch-v32/arch/system.h b/arch/cris/include/arch-v32/arch/system.h new file mode 100644 index 00000000000..6ca90f1f110 --- /dev/null +++ b/arch/cris/include/arch-v32/arch/system.h @@ -0,0 +1,69 @@ +#ifndef _ASM_CRIS_ARCH_SYSTEM_H +#define _ASM_CRIS_ARCH_SYSTEM_H + + +/* Read the CPU version register. */ +static inline unsigned long rdvr(void) +{ + unsigned char vr; + + __asm__ __volatile__ ("move $vr, %0" : "=rm" (vr)); + return vr; +} + +#define cris_machine_name "crisv32" + +/* Read the user-mode stack pointer. */ +static inline unsigned long rdusp(void) +{ + unsigned long usp; + + __asm__ __volatile__ ("move $usp, %0" : "=rm" (usp)); + return usp; +} + +/* Read the current stack pointer. */ +static inline unsigned long rdsp(void) +{ + unsigned long sp; + + __asm__ __volatile__ ("move.d $sp, %0" : "=rm" (sp)); + return sp; +} + +/* Write the user-mode stack pointer. */ +#define wrusp(usp) __asm__ __volatile__ ("move %0, $usp" : : "rm" (usp)) + +#define nop() __asm__ __volatile__ ("nop"); + +#define xchg(ptr,x) \ + ((__typeof__(*(ptr)))__xchg((unsigned long) (x),(ptr),sizeof(*(ptr)))) + +#define tas(ptr) (xchg((ptr),1)) + +struct __xchg_dummy { unsigned long a[100]; }; +#define __xg(x) ((struct __xchg_dummy *)(x)) + +/* Used for interrupt control. */ +#define local_save_flags(x) \ + __asm__ __volatile__ ("move $ccs, %0" : "=rm" (x) : : "memory"); + +#define local_irq_restore(x) \ + __asm__ __volatile__ ("move %0, $ccs" : : "rm" (x) : "memory"); + +#define local_irq_disable() __asm__ __volatile__ ("di" : : : "memory"); +#define local_irq_enable() __asm__ __volatile__ ("ei" : : : "memory"); + +#define irqs_disabled() \ +({ \ + unsigned long flags; \ + \ + local_save_flags(flags);\ + !(flags & (1 << I_CCS_BITNR)); \ +}) + +/* Used for spinlocks, etc. */ +#define local_irq_save(x) \ + __asm__ __volatile__ ("move $ccs, %0\n\tdi" : "=rm" (x) : : "memory"); + +#endif /* _ASM_CRIS_ARCH_SYSTEM_H */ |