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/*
* Copyright (C) 2008 Michal Simek
* Copyright (C) 2008 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/segment.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 prepare_to_copy(tsk) do {} while (0)
# endif /* __ASSEMBLY__ */
/*
* 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 { }
/* Do necessary setup to start up a newly executed thread. */
static inline void start_thread(struct pt_regs *regs,
unsigned long pc,
unsigned long usp)
{
regs->pc = pc;
regs->r1 = usp;
regs->pt_mode = 0;
}
/* 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);
/*
* create a kernel thread without removing it from tasklists
*/
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
# define task_pt_regs(tsk) \
(((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)
# define KSTK_EIP(tsk) (0)
# define KSTK_ESP(tsk) (0)
#endif /* _ASM_MICROBLAZE_PROCESSOR_H */
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