2 * Copyright (C) 2008 Michal Simek
3 * Copyright (C) 2008 PetaLogix
4 * Copyright (C) 2006 Atmark Techno, Inc.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
11 #ifndef _ASM_MICROBLAZE_PROCESSOR_H
12 #define _ASM_MICROBLAZE_PROCESSOR_H
14 #include <asm/ptrace.h>
15 #include <asm/setup.h>
16 #include <asm/registers.h>
17 #include <asm/segment.h>
20 /* from kernel/cpu/mb.c */
21 extern const struct seq_operations cpuinfo_op;
23 # define cpu_relax() barrier()
24 # define cpu_sleep() do {} while (0)
25 # define prepare_to_copy(tsk) do {} while (0)
27 # endif /* __ASSEMBLY__ */
30 * User space process size: memory size
32 * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both
33 * user processes and the kernel is on the same memory region. They
34 * both share the memory space and that is limited by the amount of
35 * physical memory. thus, we set TASK_SIZE == amount of total memory.
37 # define TASK_SIZE (0x81000000 - 0x80000000)
40 * Default implementation of macro that returns current
41 * instruction pointer ("program counter").
43 # define current_text_addr() ({ __label__ _l; _l: &&_l; })
46 * This decides where the kernel will search for a free chunk of vm
47 * space during mmap's. We won't be using it
49 # define TASK_UNMAPPED_BASE 0
51 /* definition in include/linux/sched.h */
54 /* thread_struct is gone. use thread_info instead. */
55 struct thread_struct { };
56 # define INIT_THREAD { }
58 /* Do necessary setup to start up a newly executed thread. */
59 static inline void start_thread(struct pt_regs *regs,
65 regs->kernel_mode = 0;
68 /* Free all resources held by a thread. */
69 static inline void release_thread(struct task_struct *dead_task)
73 /* Free all resources held by a thread. */
74 static inline void exit_thread(void)
78 extern unsigned long thread_saved_pc(struct task_struct *t);
80 extern unsigned long get_wchan(struct task_struct *p);
83 * create a kernel thread without removing it from tasklists
85 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
87 # define task_pt_regs(tsk) \
88 (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)
90 # define KSTK_EIP(tsk) (0)
91 # define KSTK_ESP(tsk) (0)
93 #endif /* _ASM_MICROBLAZE_PROCESSOR_H */