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https://github.com/torvalds/linux
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78 lines
1.8 KiB
C
78 lines
1.8 KiB
C
#ifndef _ASM_CRIS_ARCH_SYSTEM_H
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#define _ASM_CRIS_ARCH_SYSTEM_H
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/* Read the CPU version register. */
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static inline unsigned long rdvr(void)
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{
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unsigned char vr;
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__asm__ __volatile__ ("move $vr, %0" : "=rm" (vr));
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return vr;
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}
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#define cris_machine_name "crisv32"
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/* Read the user-mode stack pointer. */
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static inline unsigned long rdusp(void)
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{
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unsigned long usp;
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__asm__ __volatile__ ("move $usp, %0" : "=rm" (usp));
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return usp;
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}
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/* Read the current stack pointer. */
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static inline unsigned long rdsp(void)
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{
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unsigned long sp;
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__asm__ __volatile__ ("move.d $sp, %0" : "=rm" (sp));
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return sp;
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}
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/* Write the user-mode stack pointer. */
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#define wrusp(usp) __asm__ __volatile__ ("move %0, $usp" : : "rm" (usp))
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#define nop() __asm__ __volatile__ ("nop");
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#define xchg(ptr,x) \
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((__typeof__(*(ptr)))__xchg((unsigned long) (x),(ptr),sizeof(*(ptr))))
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#define tas(ptr) (xchg((ptr),1))
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struct __xchg_dummy { unsigned long a[100]; };
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#define __xg(x) ((struct __xchg_dummy *)(x))
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/* Used for interrupt control. */
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#define local_save_flags(x) \
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__asm__ __volatile__ ("move $ccs, %0" : "=rm" (x) : : "memory");
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#define local_irq_restore(x) \
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__asm__ __volatile__ ("move %0, $ccs" : : "rm" (x) : "memory");
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#define local_irq_disable() __asm__ __volatile__ ("di" : : : "memory");
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#define local_irq_enable() __asm__ __volatile__ ("ei" : : : "memory");
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#define irqs_disabled() \
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({ \
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unsigned long flags; \
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\
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local_save_flags(flags);\
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!(flags & (1 << I_CCS_BITNR)); \
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})
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/* Used for spinlocks, etc. */
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#define local_irq_save(x) \
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__asm__ __volatile__ ("move $ccs, %0\n\tdi" : "=rm" (x) : : "memory");
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#ifdef CONFIG_SMP
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typedef struct {
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volatile unsigned int lock __attribute__ ((aligned(4)));
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#ifdef CONFIG_PREEMPT
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unsigned int break_lock;
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#endif
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} spinlock_t;
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#endif
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#endif /* _ASM_CRIS_ARCH_SYSTEM_H */
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