/* *  arch/arm/include/asm/processor.h * *  Copyright (C) 1995-1999 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #ifndef __ASM_ARM_PROCESSOR_H#define __ASM_ARM_PROCESSOR_H /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr() ({ __label__ _l; _l: &&_l;}) #ifdef __KERNEL__ #include <asm/hw_breakpoint.h>#include <asm/ptrace.h>#include <asm/types.h>#include <asm/system.h> #ifdef __KERNEL__#define STACK_TOP	((current->personality & ADDR_LIMIT_32BIT) ? \			 TASK_SIZE : TASK_SIZE_26)#define STACK_TOP_MAX	TASK_SIZE#endif struct debug_info {#ifdef CONFIG_HAVE_HW_BREAKPOINT	struct perf_event	*hbp[ARM_MAX_HBP_SLOTS];#endif}; struct thread_struct {							/* fault info	  */	unsigned long		address;	unsigned long		trap_no;	unsigned long		error_code;							/* debugging	  */	struct debug_info	debug;}; #define INIT_THREAD  {	} #ifdef CONFIG_MMU#define nommu_start_thread(regs) do { } while (0)#else#define nommu_start_thread(regs) regs->ARM_r10 = current->mm->start_data#endif #define start_thread(regs,pc,sp)					\({									\	unsigned long *stack = (unsigned long *)sp;			\	set_fs(USER_DS);						\	memset(regs->uregs, 0, sizeof(regs->uregs));			\	if (current->personality & ADDR_LIMIT_32BIT)			\		regs->ARM_cpsr = USR_MODE;				\	else								\		regs->ARM_cpsr = USR26_MODE;				\	if (elf_hwcap & HWCAP_THUMB && pc & 1)				\		regs->ARM_cpsr |= PSR_T_BIT;				\	regs->ARM_cpsr |= PSR_ENDSTATE;					\	regs->ARM_pc = pc & ~1;		/* pc */			\	regs->ARM_sp = sp;		/* sp */			\	regs->ARM_r2 = stack[2];	/* r2 (envp) */			\	regs->ARM_r1 = stack[1];	/* r1 (argv) */			\	regs->ARM_r0 = stack[0];	/* r0 (argc) */			\	nommu_start_thread(regs);					\}) /* Forward declaration, a strange C thing */struct task_struct; /* Free all resources held by a thread. */extern void release_thread(struct task_struct *); /* Prepare to copy thread state - unlazy all lazy status */#define prepare_to_copy(tsk)	do { } while (0) unsigned long get_wchan(struct task_struct *p); #if __LINUX_ARM_ARCH__ == 6 || defined(CONFIG_ARM_ERRATA_754327)#define cpu_relax()			smp_mb()#else#define cpu_relax()			barrier()#endif /* * Create a new kernel thread */extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); #define task_pt_regs(p) \	((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1) #define KSTK_EIP(tsk)	task_pt_regs(tsk)->ARM_pc#define KSTK_ESP(tsk)	task_pt_regs(tsk)->ARM_sp /* * Prefetching support - only ARMv5. */#if __LINUX_ARM_ARCH__ >= 5 #define ARCH_HAS_PREFETCHstatic inline void prefetch(const void *ptr){	__asm__ __volatile__(		"pld\t%a0"		:		: "p" (ptr)		: "cc");} #define ARCH_HAS_PREFETCHW#define prefetchw(ptr)	prefetch(ptr) #define ARCH_HAS_SPINLOCK_PREFETCH#define spin_lock_prefetch(x) do { } while (0) #endif #define HAVE_ARCH_PICK_MMAP_LAYOUT #endif #endif /* __ASM_ARM_PROCESSOR_H */