/* MN10300 Processor specifics * * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd. * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #ifndef _ASM_PROCESSOR_H#define _ASM_PROCESSOR_H #include <linux/threads.h>#include <linux/thread_info.h>#include <asm/page.h>#include <asm/ptrace.h>#include <asm/cpu-regs.h>#include <asm/uaccess.h>#include <asm/current.h> /* Forward declaration, a strange C thing */struct task_struct;struct mm_struct; /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#define current_text_addr()			\({						\	void *__pc;				\	asm("mov pc,%0" : "=a"(__pc));		\	__pc;					\}) extern void get_mem_info(unsigned long *mem_base, unsigned long *mem_size); extern void show_registers(struct pt_regs *regs); /* *  CPU type and hardware bug flags. Kept separately for each CPU. *  Members of this structure are referenced in head.S, so think twice *  before touching them. [mj] */ struct mn10300_cpuinfo {	int		type;	unsigned long	loops_per_jiffy;	char		hard_math;}; extern struct mn10300_cpuinfo boot_cpu_data; #ifdef CONFIG_SMP#if CONFIG_NR_CPUS < 2 || CONFIG_NR_CPUS > 8# error Sorry, NR_CPUS should be 2 to 8#endifextern struct mn10300_cpuinfo cpu_data[];#define current_cpu_data cpu_data[smp_processor_id()]#else  /* CONFIG_SMP */#define cpu_data &boot_cpu_data#define current_cpu_data boot_cpu_data#endif /* CONFIG_SMP */ extern void identify_cpu(struct mn10300_cpuinfo *);extern void print_cpu_info(struct mn10300_cpuinfo *);extern void dodgy_tsc(void);#define cpu_relax() barrier() /* * User space process size: 1.75GB (default). */#define TASK_SIZE		0x70000000 /* * Where to put the userspace stack by default */#define STACK_TOP		0x70000000#define STACK_TOP_MAX		STACK_TOP /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */#define TASK_UNMAPPED_BASE	0x30000000 struct fpu_state_struct {	unsigned long	fs[32];		/* fpu registers */	unsigned long	fpcr;		/* fpu control register */}; struct thread_struct {	struct pt_regs		*uregs;		/* userspace register frame */	unsigned long		pc;		/* kernel PC */	unsigned long		sp;		/* kernel SP */	unsigned long		a3;		/* kernel FP */	unsigned long		wchan;	unsigned long		usp;	unsigned long		fpu_flags;#define THREAD_USING_FPU	0x00000001	/* T if this task is using the FPU */#define THREAD_HAS_FPU		0x00000002	/* T if this task owns the FPU right now */	struct fpu_state_struct	fpu_state;}; #define INIT_THREAD		\{				\	.uregs	= init_uregs,	\	.pc	= 0,		\	.sp	= 0,		\	.a3	= 0,		\	.wchan	= 0,		\} #define INIT_MMAP \{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \  NULL, NULL } /* * do necessary setup to start up a newly executed thread * - need to discard the frame stacked by the kernel thread invoking the execve *   syscall (see RESTORE_ALL macro) */static inline void start_thread(struct pt_regs *regs,				unsigned long new_pc, unsigned long new_sp){	struct thread_info *ti = current_thread_info();	struct pt_regs *frame0; 	frame0 = thread_info_to_uregs(ti);	frame0->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;	frame0->pc = new_pc;	frame0->sp = new_sp;	ti->frame = frame0;}  /* Free all resources held by a thread. */extern void release_thread(struct task_struct *); /* * create a kernel thread without removing it from tasklists */extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); /* * Return saved PC of a blocked thread. */extern unsigned long thread_saved_pc(struct task_struct *tsk); unsigned long get_wchan(struct task_struct *p); #define task_pt_regs(task) ((task)->thread.uregs)#define KSTK_EIP(task) (task_pt_regs(task)->pc)#define KSTK_ESP(task) (task_pt_regs(task)->sp) #define KSTK_TOP(info)				\({						\	(unsigned long)(info) + THREAD_SIZE;	\}) #define ARCH_HAS_PREFETCH#define ARCH_HAS_PREFETCHW static inline void prefetch(const void *x){#ifdef CONFIG_MN10300_CACHE_ENABLED#ifdef CONFIG_MN10300_PROC_MN103E010	asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));#else	asm volatile ("dcpf (%0)" : : "r"(x));#endif#endif} static inline void prefetchw(const void *x){#ifdef CONFIG_MN10300_CACHE_ENABLED#ifdef CONFIG_MN10300_PROC_MN103E010	asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));#else	asm volatile ("dcpf (%0)" : : "r"(x));#endif#endif} #endif /* _ASM_PROCESSOR_H */