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 #include <asm/entry.h> 19 #include <asm/current.h> 20 21 # ifndef __ASSEMBLY__ 22 /* from kernel/cpu/mb.c */ 23 extern const struct seq_operations cpuinfo_op; 24 25 # define cpu_relax() barrier() 26 # define cpu_sleep() do {} while (0) 27 # define prepare_to_copy(tsk) do {} while (0) 28 29 # endif /* __ASSEMBLY__ */ 30 31 #define task_pt_regs(tsk) \ 32 (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) 33 34 /* Do necessary setup to start up a newly executed thread. */ 35 void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp); 36 37 /* 38 * User space process size: memory size 39 * 40 * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both 41 * user processes and the kernel is on the same memory region. They 42 * both share the memory space and that is limited by the amount of 43 * physical memory. thus, we set TASK_SIZE == amount of total memory. 44 */ 45 # define TASK_SIZE (0x81000000 - 0x80000000) 46 47 /* 48 * Default implementation of macro that returns current 49 * instruction pointer ("program counter"). 50 */ 51 # define current_text_addr() ({ __label__ _l; _l: &&_l; }) 52 53 /* 54 * This decides where the kernel will search for a free chunk of vm 55 * space during mmap's. We won't be using it 56 */ 57 # define TASK_UNMAPPED_BASE 0 58 59 /* definition in include/linux/sched.h */ 60 struct task_struct; 61 62 /* thread_struct is gone. use thread_info instead. */ 63 struct thread_struct { }; 64 # define INIT_THREAD { } 65 66 /* Free all resources held by a thread. */ 67 static inline void release_thread(struct task_struct *dead_task) 68 { 69 } 70 71 /* Free all resources held by a thread. */ 72 static inline void exit_thread(void) 73 { 74 } 75 76 extern unsigned long thread_saved_pc(struct task_struct *t); 77 78 extern unsigned long get_wchan(struct task_struct *p); 79 80 /* 81 * create a kernel thread without removing it from tasklists 82 */ 83 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); 84 85 # define KSTK_EIP(tsk) (0) 86 # define KSTK_ESP(tsk) (0) 87 88 #endif /* _ASM_MICROBLAZE_PROCESSOR_H */ 89