/* * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> * Copyright (C) 2008-2009 PetaLogix * Copyright (C) 2006 Atmark Techno, Inc. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #ifndef _ASM_MICROBLAZE_PROCESSOR_H#define _ASM_MICROBLAZE_PROCESSOR_H #include <asm/ptrace.h>#include <asm/setup.h>#include <asm/registers.h>#include <asm/entry.h>#include <asm/current.h> # ifndef __ASSEMBLY__/* from kernel/cpu/mb.c */extern const struct seq_operations cpuinfo_op; # define cpu_relax()		barrier()# define cpu_sleep()		do {} while (0) #define task_pt_regs(tsk) \		(((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) /* Do necessary setup to start up a newly executed thread. */void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp); extern void ret_from_fork(void);extern void ret_from_kernel_thread(void); # endif /* __ASSEMBLY__ */ # ifndef CONFIG_MMU/* * User space process size: memory size * * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both * user processes and the kernel is on the same memory region. They * both share the memory space and that is limited by the amount of * physical memory. thus, we set TASK_SIZE == amount of total memory. */# define TASK_SIZE	(0x81000000 - 0x80000000) /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */# define current_text_addr() ({ __label__ _l; _l: &&_l; }) /* * 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 /* definition in include/linux/sched.h */struct task_struct; /* thread_struct is gone. use thread_info instead. */struct thread_struct { };# define INIT_THREAD	{ } /* Free all resources held by a thread. */static inline void release_thread(struct task_struct *dead_task){} /* Free all resources held by a thread. */static inline void exit_thread(void){} extern unsigned long thread_saved_pc(struct task_struct *t); extern unsigned long get_wchan(struct task_struct *p); # define KSTK_EIP(tsk)	(0)# define KSTK_ESP(tsk)	(0) # else /* CONFIG_MMU */ /* * This is used to define STACK_TOP, and with MMU it must be below * kernel base to select the correct PGD when handling MMU exceptions. */# define TASK_SIZE	(CONFIG_KERNEL_START) /* * This decides where the kernel will search for a free chunk of vm * space during mmap's. */# define TASK_UNMAPPED_BASE	(TASK_SIZE / 8 * 3) # define THREAD_KSP	0 #  ifndef __ASSEMBLY__ /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */#  define current_text_addr()	({ __label__ _l; _l: &&_l; }) /* If you change this, you must change the associated assembly-languages * constants defined below, THREAD_*. */struct thread_struct {	/* kernel stack pointer (must be first field in structure) */	unsigned long	ksp;	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */	void		*pgdir;		/* root of page-table tree */	struct pt_regs	*regs;		/* Pointer to saved register state */}; #  define INIT_THREAD { \	.ksp   = sizeof init_stack + (unsigned long)init_stack, \	.pgdir = swapper_pg_dir, \} /* Free all resources held by a thread. */extern inline void release_thread(struct task_struct *dead_task){} /* Free current thread data structures etc.  */static inline void exit_thread(void){} /* Return saved (kernel) PC of a blocked thread.  */#  define thread_saved_pc(tsk)	\	((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0) unsigned long get_wchan(struct task_struct *p); /* The size allocated for kernel stacks. This _must_ be a power of two! */# define KERNEL_STACK_SIZE	0x2000 /* Return some info about the user process TASK.  */#  define task_tos(task)	((unsigned long)(task) + KERNEL_STACK_SIZE)#  define task_regs(task) ((struct pt_regs *)task_tos(task) - 1) #  define task_pt_regs_plus_args(tsk) \	((void *)task_pt_regs(tsk)) #  define task_sp(task)	(task_regs(task)->r1)#  define task_pc(task)	(task_regs(task)->pc)/* Grotty old names for some.  */#  define KSTK_EIP(task)	(task_pc(task))#  define KSTK_ESP(task)	(task_sp(task)) /* FIXME */#  define deactivate_mm(tsk, mm)	do { } while (0) #  define STACK_TOP	TASK_SIZE#  define STACK_TOP_MAX	STACK_TOP void disable_hlt(void);void enable_hlt(void);void default_idle(void); #ifdef CONFIG_DEBUG_FSextern struct dentry *of_debugfs_root;#endif #  endif /* __ASSEMBLY__ */# endif /* CONFIG_MMU */#endif /* _ASM_MICROBLAZE_PROCESSOR_H */