1 /* 2 * Copyright (C) 2008 Michal Simek 3 * Copyright (C) 2008 PetaLogix 4 * Copyright (C) 2006 Atmark Techno, Inc. 5 * 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 8 * for more details. 9 */ 10 11 #ifndef _ASM_MICROBLAZE_PROCESSOR_H 12 #define _ASM_MICROBLAZE_PROCESSOR_H 13 14 #include <asm/ptrace.h> 15 #include <asm/setup.h> 16 #include <asm/registers.h> 17 #include <asm/segment.h> 18 19 # ifndef __ASSEMBLY__ 20 /* from kernel/cpu/mb.c */ 21 extern const struct seq_operations cpuinfo_op; 22 23 # define cpu_relax() barrier() 24 # define cpu_sleep() do {} while (0) 25 # define prepare_to_copy(tsk) do {} while (0) 26 27 # endif /* __ASSEMBLY__ */ 28 29 #define task_pt_regs(tsk) \ 30 (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) 31 32 /* Do necessary setup to start up a newly executed thread. */ 33 void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp); 34 35 /* 36 * User space process size: memory size 37 * 38 * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both 39 * user processes and the kernel is on the same memory region. They 40 * both share the memory space and that is limited by the amount of 41 * physical memory. thus, we set TASK_SIZE == amount of total memory. 42 */ 43 # define TASK_SIZE (0x81000000 - 0x80000000) 44 45 /* 46 * Default implementation of macro that returns current 47 * instruction pointer ("program counter"). 48 */ 49 # define current_text_addr() ({ __label__ _l; _l: &&_l; }) 50 51 /* 52 * This decides where the kernel will search for a free chunk of vm 53 * space during mmap's. We won't be using it 54 */ 55 # define TASK_UNMAPPED_BASE 0 56 57 /* definition in include/linux/sched.h */ 58 struct task_struct; 59 60 /* thread_struct is gone. use thread_info instead. */ 61 struct thread_struct { }; 62 # define INIT_THREAD { } 63 64 /* Free all resources held by a thread. */ 65 static inline void release_thread(struct task_struct *dead_task) 66 { 67 } 68 69 /* Free all resources held by a thread. */ 70 static inline void exit_thread(void) 71 { 72 } 73 74 extern unsigned long thread_saved_pc(struct task_struct *t); 75 76 extern unsigned long get_wchan(struct task_struct *p); 77 78 /* 79 * create a kernel thread without removing it from tasklists 80 */ 81 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); 82 83 # define KSTK_EIP(tsk) (0) 84 # define KSTK_ESP(tsk) (0) 85 86 #endif /* _ASM_MICROBLAZE_PROCESSOR_H */ 87