include/asm-cris/arch-v32/system.h

   1 #ifndef _ASM_CRIS_ARCH_SYSTEM_H
   2 #define _ASM_CRIS_ARCH_SYSTEM_H
   3
   4 #include <linux/config.h>
   5
   6 /* Read the CPU version register. */
   7 static inline unsigned long rdvr(void)
   8 {
   9         unsigned char vr;
  10
  11         __asm__ __volatile__ ("move $vr, %0" : "=rm" (vr));
  12         return vr;
  13 }
  14
  15 #define cris_machine_name "crisv32"
  16
  17 /* Read the user-mode stack pointer. */
  18 static inline unsigned long rdusp(void)
  19 {
  20         unsigned long usp;
  21
  22         __asm__ __volatile__ ("move $usp, %0" : "=rm" (usp));
  23         return usp;
  24 }
  25
  26 /* Read the current stack pointer. */
  27 static inline unsigned long rdsp(void)
  28 {
  29         unsigned long sp;
  30
  31         __asm__ __volatile__ ("move.d $sp, %0" : "=rm" (sp));
  32         return sp;
  33 }
  34
  35 /* Write the user-mode stack pointer. */
  36 #define wrusp(usp) __asm__ __volatile__ ("move %0, $usp" : : "rm" (usp))
  37
  38 #define nop() __asm__ __volatile__ ("nop");
  39
  40 #define xchg(ptr,x) \
  41         ((__typeof__(*(ptr)))__xchg((unsigned long) (x),(ptr),sizeof(*(ptr))))
  42
  43 #define tas(ptr) (xchg((ptr),1))
  44
  45 struct __xchg_dummy { unsigned long a[100]; };
  46 #define __xg(x) ((struct __xchg_dummy *)(x))
  47
  48 /* Used for interrupt control. */
  49 #define local_save_flags(x) \
  50         __asm__ __volatile__ ("move $ccs, %0" : "=rm" (x) : : "memory");
  51
  52 #define local_irq_restore(x) \
  53         __asm__ __volatile__ ("move %0, $ccs" : : "rm" (x) : "memory");
  54
  55 #define local_irq_disable()  __asm__ __volatile__ ("di" : : : "memory");
  56 #define local_irq_enable()   __asm__ __volatile__ ("ei" : : : "memory");
  57
  58 #define irqs_disabled()         \
  59 ({                              \
  60         unsigned long flags;    \
  61                                 \
  62         local_save_flags(flags);\
  63         !(flags & (1 << I_CCS_BITNR));  \
  64 })
  65
  66 /* Used for spinlocks, etc. */
  67 #define local_irq_save(x) \
  68         __asm__ __volatile__ ("move $ccs, %0\n\tdi" : "=rm" (x) : : "memory");
  69
  70 #ifdef CONFIG_SMP
  71 typedef struct {
  72         volatile unsigned int lock __attribute__ ((aligned(4)));
  73 #ifdef CONFIG_PREEMPT
  74         unsigned int break_lock;
  75 #endif
  76 } spinlock_t;
  77 #endif
  78
  79 #endif /* _ASM_CRIS_ARCH_SYSTEM_H */