/* * include/asm-h8300/processor.h * * Copyright (C) 2002 Yoshinori Sato * * Based on: linux/asm-m68nommu/processor.h * * Copyright (C) 1995 Hamish Macdonald */ #ifndef __ASM_H8300_PROCESSOR_H#define __ASM_H8300_PROCESSOR_H /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr() ({ __label__ _l; _l: &&_l; }) #include <linux/compiler.h>#include <asm/segment.h>#include <asm/ptrace.h>#include <asm/current.h> static inline unsigned long rdusp(void){	extern unsigned int	_sw_usp; 	return _sw_usp;} static inline void wrusp(unsigned long usp){	extern unsigned int	_sw_usp; 	_sw_usp = usp;} /* * User space process size: 3.75GB. This is hardcoded into a few places, * so don't change it unless you know what you are doing. */#define TASK_SIZE	(0xFFFFFFFFUL) #ifdef __KERNEL__#define STACK_TOP	TASK_SIZE#define STACK_TOP_MAX	STACK_TOP#endif /* * This decides where the kernel will search for a free chunk of vm * space during mmap's. We won't be using it */#define TASK_UNMAPPED_BASE	0 struct thread_struct {	unsigned long  ksp;		/* kernel stack pointer */	unsigned long  usp;		/* user stack pointer */	unsigned long  ccr;		/* saved status register */	unsigned long  esp0;            /* points to SR of stack frame */	struct {		unsigned short *addr;		unsigned short inst;	} breakinfo;}; #define INIT_THREAD  {						\	.ksp  = sizeof(init_stack) + (unsigned long)init_stack, \	.usp  = 0,						\	.ccr  = PS_S,						\	.esp0 = 0,						\	.breakinfo = {						\		.addr = (unsigned short *)-1,			\		.inst = 0					\	}							\} /* * Do necessary setup to start up a newly executed thread. * * pass the data segment into user programs if it exists, * it can't hurt anything as far as I can tell */#if defined(CONFIG_CPU_H8300H)#define start_thread(_regs, _pc, _usp)				\do {								\	(_regs)->pc = (_pc);					\	(_regs)->ccr = 0x00;	   /* clear all flags */	\	(_regs)->er5 = current->mm->start_data;	/* GOT base */	\	(_regs)->sp = ((unsigned long)(_usp)) - sizeof(unsigned long) * 3; \} while (0)#endif#if defined(CONFIG_CPU_H8S)#define start_thread(_regs, _pc, _usp)				\do {								\	(_regs)->pc = (_pc);					\	(_regs)->ccr = 0x00;	   /* clear kernel flag */	\	(_regs)->exr = 0x78;	   /* enable all interrupts */	\	(_regs)->er5 = current->mm->start_data;	/* GOT base */	\	/* 14 = space for retaddr(4), vector(4), er0(4) and exr(2) on stack */ \	(_regs)->sp = ((unsigned long)(_usp)) - 14;		\} while (0)#endif /* 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){} 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()    barrier() #define HARD_RESET_NOW() ({		\	local_irq_disable();		\	asm("jmp @@0");			\}) #endif