text: /*
   * linux/arch/unicore32/include/asm/processor.h
   *
   * Code specific to PKUnity SoC and UniCore ISA
   *
   * Copyright (C) 2001-2010 GUAN Xue-tao
   *
   * 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 __UNICORE_PROCESSOR_H__
  #define __UNICORE_PROCESSOR_H__
  
  #ifdef __KERNEL__
  
  #include <asm/ptrace.h>
  #include <asm/types.h>
  
  #ifdef __KERNEL__
  #define STACK_TOP	TASK_SIZE
  #define STACK_TOP_MAX	TASK_SIZE
  #endif
  
  struct debug_entry {
  	u32			address;
  	u32			insn;
  };
  
  struct debug_info {
  	int			nsaved;
  	struct debug_entry	bp[2];
  };
  
  struct thread_struct {
  							/* fault info	  */
  	unsigned long		address;
  	unsigned long		trap_no;
  	unsigned long		error_code;
  							/* debugging	  */
  	struct debug_info	debug;
  };
  
  #define INIT_THREAD  {	}
  
  #define start_thread(regs, pc, sp)					\
  ({									\
  	unsigned long *stack = (unsigned long *)sp;			\
  	memset(regs->uregs, 0, sizeof(regs->uregs));			\
  	regs->UCreg_asr = USER_MODE;					\
  	regs->UCreg_pc = pc & ~1;	/* pc */                        \
  	regs->UCreg_sp = sp;		/* sp */                        \
  	regs->UCreg_02 = stack[2];	/* r2 (envp) */                 \
  	regs->UCreg_01 = stack[1];	/* r1 (argv) */                 \
  	regs->UCreg_00 = stack[0];	/* r0 (argc) */                 \
  })
  
  /* Forward declaration, a strange C thing */
  struct task_struct;
  
  /* Free all resources held by a thread. */
  extern void release_thread(struct task_struct *);
  
  unsigned long get_wchan(struct task_struct *p);
  
  #define cpu_relax()			barrier()
  
  #define task_pt_regs(p) \
  	((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1)
  
  #define KSTK_EIP(tsk)	(task_pt_regs(tsk)->UCreg_pc)
  #define KSTK_ESP(tsk)	(task_pt_regs(tsk)->UCreg_sp)
  
  #endif
  
  #endif /* __UNICORE_PROCESSOR_H__ */
  