/* * Copyright 2004-2009 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ #ifndef __ASM_BFIN_PROCESSOR_H#define __ASM_BFIN_PROCESSOR_H /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr() ({ __label__ _l; _l: &&_l;}) #include <asm/ptrace.h>#include <mach/blackfin.h> static inline unsigned long rdusp(void){	unsigned long usp; 	__asm__ __volatile__("%0 = usp;\n\t":"=da"(usp));	return usp;} static inline void wrusp(unsigned long usp){	__asm__ __volatile__("usp = %0;\n\t"::"da"(usp));} static inline unsigned long __get_SP(void){	unsigned long sp; 	__asm__ __volatile__("%0 = sp;\n\t" : "=da"(sp));	return sp;} /* * User space process size: 1st byte beyond user address space. * Fairly meaningless on nommu.  Parts of user programs can be scattered * in a lot of places, so just disable this by setting it to 0xFFFFFFFF. */#define TASK_SIZE	0xFFFFFFFF #ifdef __KERNEL__#define STACK_TOP	TASK_SIZE#endif #define TASK_UNMAPPED_BASE	0 struct thread_struct {	unsigned long ksp;	/* kernel stack pointer */	unsigned long usp;	/* user stack pointer */	unsigned short seqstat;	/* saved status register */	unsigned long esp0;	/* points to SR of stack frame pt_regs */	unsigned long pc;	/* instruction pointer */	void *        debuggerinfo;}; #define INIT_THREAD  {						\	sizeof(init_stack) + (unsigned long) init_stack, 0,	\	PS_S, 0, 0						\} extern void start_thread(struct pt_regs *regs, unsigned long new_ip,					       unsigned long new_sp); /* Forward declaration, a strange C thing */struct task_struct; /* Free all resources held by a thread. */static inline void release_thread(struct task_struct *dead_task){} /* * Free current thread data structures etc.. */static inline void exit_thread(void){} /* * Return saved PC of a blocked thread. */#define thread_saved_pc(tsk)	(tsk->thread.pc) unsigned long get_wchan(struct task_struct *p); #define	KSTK_EIP(tsk)							\    ({									\	unsigned long eip = 0;						\	if ((tsk)->thread.esp0 > PAGE_SIZE &&				\	    MAP_NR((tsk)->thread.esp0) < max_mapnr)			\	      eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc;	\	eip; })#define	KSTK_ESP(tsk)	((tsk) == current ? rdusp() : (tsk)->thread.usp) #define cpu_relax()    	smp_mb()  /* Get the Silicon Revision of the chip */static inline uint32_t __pure bfin_revid(void){	/* Always use CHIPID, to work around ANOMALY_05000234 */	uint32_t revid = (bfin_read_CHIPID() & CHIPID_VERSION) >> 28; #ifdef _BOOTROM_GET_DXE_ADDRESS_TWI	/*	 * ANOMALY_05000364	 * Incorrect Revision Number in DSPID Register	 */	if (ANOMALY_05000364 &&	    bfin_read16(_BOOTROM_GET_DXE_ADDRESS_TWI) == 0x2796)		revid = 1;#endif 	return revid;} static inline uint16_t __pure bfin_cpuid(void){	return (bfin_read_CHIPID() & CHIPID_FAMILY) >> 12;} static inline uint32_t __pure bfin_dspid(void){	return bfin_read_DSPID();} #define blackfin_core_id() (bfin_dspid() & 0xff) static inline uint32_t __pure bfin_compiled_revid(void){#if defined(CONFIG_BF_REV_0_0)	return 0;#elif defined(CONFIG_BF_REV_0_1)	return 1;#elif defined(CONFIG_BF_REV_0_2)	return 2;#elif defined(CONFIG_BF_REV_0_3)	return 3;#elif defined(CONFIG_BF_REV_0_4)	return 4;#elif defined(CONFIG_BF_REV_0_5)	return 5;#elif defined(CONFIG_BF_REV_0_6)	return 6;#elif defined(CONFIG_BF_REV_ANY)	return 0xffff;#else	return -1;#endif} #endif