#ifndef __ASM_SH64_SYSTEM_H#define __ASM_SH64_SYSTEM_H /* * This file is subject to the terms and conditions of the GNU General Public * License.  See the file "COPYING" in the main directory of this archive * for more details. * * include/asm-sh64/system.h * * Copyright (C) 2000, 2001  Paolo Alberelli * Copyright (C) 2003  Paul Mundt * Copyright (C) 2004  Richard Curnow * */ #include <asm/registers.h>#include <asm/processor.h> /* *	switch_to() should switch tasks to task nr n, first */ typedef struct {	unsigned long seg;} mm_segment_t; extern struct task_struct *sh64_switch_to(struct task_struct *prev,					  struct thread_struct *prev_thread,					  struct task_struct *next,					  struct thread_struct *next_thread); #define switch_to(prev,next,last) \	do {\		if (last_task_used_math != next) {\			struct pt_regs *regs = next->thread.uregs;\			if (regs) regs->sr |= SR_FD;\		}\		last = sh64_switch_to(prev, &prev->thread, next, &next->thread);\	} while(0) #define nop() __asm__ __volatile__ ("nop") #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) #define tas(ptr) (xchg((ptr), 1)) extern void __xchg_called_with_bad_pointer(void); #define mb()	__asm__ __volatile__ ("synco": : :"memory")#define rmb()	mb()#define wmb()	__asm__ __volatile__ ("synco": : :"memory")#define read_barrier_depends()	do { } while (0) #ifdef CONFIG_SMP#define smp_mb()	mb()#define smp_rmb()	rmb()#define smp_wmb()	wmb()#define smp_read_barrier_depends()	read_barrier_depends()#else#define smp_mb()	barrier()#define smp_rmb()	barrier()#define smp_wmb()	barrier()#define smp_read_barrier_depends()	do { } while (0)#endif /* CONFIG_SMP */ #define set_rmb(var, value) do { xchg(&var, value); } while (0)#define set_mb(var, value) set_rmb(var, value)#define set_wmb(var, value) do { var = value; wmb(); } while (0) /* Interrupt Control */#ifndef HARD_CLI#define SR_MASK_L 0x000000f0L#define SR_MASK_LL 0x00000000000000f0LL#else#define SR_MASK_L 0x10000000L#define SR_MASK_LL 0x0000000010000000LL#endif static __inline__ void local_irq_enable(void){	/* cli/sti based on SR.BL */	unsigned long long __dummy0, __dummy1=~SR_MASK_LL; 	__asm__ __volatile__("getcon	" __SR ", %0\n\t"			     "and	%0, %1, %0\n\t"			     "putcon	%0, " __SR "\n\t"			     : "=&r" (__dummy0)			     : "r" (__dummy1));} static __inline__ void local_irq_disable(void){	/* cli/sti based on SR.BL */	unsigned long long __dummy0, __dummy1=SR_MASK_LL;	__asm__ __volatile__("getcon	" __SR ", %0\n\t"			     "or	%0, %1, %0\n\t"			     "putcon	%0, " __SR "\n\t"			     : "=&r" (__dummy0)			     : "r" (__dummy1));} #define local_save_flags(x) 						\(__extension__ ({	unsigned long long __dummy=SR_MASK_LL;		\	__asm__ __volatile__(						\		"getcon	" __SR ", %0\n\t"				\		"and	%0, %1, %0"					\		: "=&r" (x)						\		: "r" (__dummy));})) #define local_irq_save(x)						\(__extension__ ({	unsigned long long __d2=SR_MASK_LL, __d1;	\	__asm__ __volatile__(          	         			\		"getcon	" __SR ", %1\n\t" 				\		"or	%1, r63, %0\n\t"				\		"or	%1, %2, %1\n\t"					\		"putcon	%1, " __SR "\n\t"    				\		"and	%0, %2, %0"    					\		: "=&r" (x), "=&r" (__d1)				\		: "r" (__d2));})); #define local_irq_restore(x) do { 					\	if ( ((x) & SR_MASK_L) == 0 )		/* dropping to 0 ? */	\		local_irq_enable();		/* yes...re-enable */	\} while (0) #define irqs_disabled()			\({					\	unsigned long flags;		\	local_save_flags(flags);	\	(flags != 0);			\}) static inline unsigned long xchg_u32(volatile int * m, unsigned long val){	unsigned long flags, retval; 	local_irq_save(flags);	retval = *m;	*m = val;	local_irq_restore(flags);	return retval;} static inline unsigned long xchg_u8(volatile unsigned char * m, unsigned long val){	unsigned long flags, retval; 	local_irq_save(flags);	retval = *m;	*m = val & 0xff;	local_irq_restore(flags);	return retval;} static __inline__ unsigned long __xchg(unsigned long x, volatile void * ptr, int size){	switch (size) {	case 4:		return xchg_u32(ptr, x);		break;	case 1:		return xchg_u8(ptr, x);		break;	}	__xchg_called_with_bad_pointer();	return x;} /* XXX * disable hlt during certain critical i/o operations */#define HAVE_DISABLE_HLTvoid disable_hlt(void);void enable_hlt(void);  #define smp_mb()        barrier()#define smp_rmb()       barrier()#define smp_wmb()       barrier() #ifdef CONFIG_SH_ALPHANUMERIC/* This is only used for debugging. */extern void print_seg(char *file,int line);#define PLS() print_seg(__FILE__,__LINE__)#else	/* CONFIG_SH_ALPHANUMERIC */#define PLS()#endif	/* CONFIG_SH_ALPHANUMERIC */ #define PL() printk("@ <%s,%s:%d>\n",__FILE__,__FUNCTION__,__LINE__) #define arch_align_stack(x) (x) #endif /* __ASM_SH64_SYSTEM_H */