| Ley Foon Tan | 71995e4 | 2014-11-06 15:19:47 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 Altera Corporation |
| 3 | * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> |
| 4 | * Copyright (C) 2004 Microtronix Datacom Ltd |
| 5 | * Copyright (C) 2001 Ken Hill (khill@microtronix.com) |
| 6 | * Vic Phillips (vic@microtronix.com) |
| 7 | * |
| 8 | * based on SPARC asm/processor_32.h which is: |
| 9 | * |
| 10 | * Copyright (C) 1994 David S. Miller |
| 11 | * |
| 12 | * This file is subject to the terms and conditions of the GNU General Public |
| 13 | * License. See the file "COPYING" in the main directory of this archive |
| 14 | * for more details. |
| 15 | */ |
| 16 | |
| 17 | #ifndef _ASM_NIOS2_PROCESSOR_H |
| 18 | #define _ASM_NIOS2_PROCESSOR_H |
| 19 | |
| 20 | #include <asm/ptrace.h> |
| 21 | #include <asm/registers.h> |
| 22 | #include <asm/page.h> |
| 23 | |
| 24 | #define NIOS2_FLAG_KTHREAD 0x00000001 /* task is a kernel thread */ |
| 25 | |
| 26 | #define NIOS2_OP_NOP 0x1883a |
| 27 | #define NIOS2_OP_BREAK 0x3da03a |
| 28 | |
| 29 | #ifdef __KERNEL__ |
| 30 | |
| 31 | #define STACK_TOP TASK_SIZE |
| 32 | #define STACK_TOP_MAX STACK_TOP |
| 33 | |
| 34 | #endif /* __KERNEL__ */ |
| 35 | |
| 36 | /* Kuser helpers is mapped to this user space address */ |
| 37 | #define KUSER_BASE 0x1000 |
| 38 | #define KUSER_SIZE (PAGE_SIZE) |
| 39 | #ifndef __ASSEMBLY__ |
| 40 | |
| 41 | /* |
| 42 | * Default implementation of macro that returns current |
| 43 | * instruction pointer ("program counter"). |
| 44 | */ |
| 45 | #define current_text_addr() ({ __label__ _l; _l: &&_l; }) |
| 46 | |
| 47 | # define TASK_SIZE 0x7FFF0000UL |
| 48 | # define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) |
| 49 | |
| 50 | /* The Nios processor specific thread struct. */ |
| 51 | struct thread_struct { |
| 52 | struct pt_regs *kregs; |
| 53 | |
| 54 | /* Context switch saved kernel state. */ |
| 55 | unsigned long ksp; |
| 56 | unsigned long kpsr; |
| 57 | }; |
| 58 | |
| 59 | #define INIT_MMAP \ |
| 60 | { &init_mm, (0), (0), __pgprot(0x0), VM_READ | VM_WRITE | VM_EXEC } |
| 61 | |
| 62 | # define INIT_THREAD { \ |
| 63 | .kregs = NULL, \ |
| 64 | .ksp = 0, \ |
| 65 | .kpsr = 0, \ |
| 66 | } |
| 67 | |
| 68 | extern void start_thread(struct pt_regs *regs, unsigned long pc, |
| 69 | unsigned long sp); |
| 70 | |
| 71 | struct task_struct; |
| 72 | |
| 73 | /* Free all resources held by a thread. */ |
| 74 | static inline void release_thread(struct task_struct *dead_task) |
| 75 | { |
| 76 | } |
| 77 | |
| Ley Foon Tan | 71995e4 | 2014-11-06 15:19:47 +0800 | [diff] [blame] | 78 | extern unsigned long get_wchan(struct task_struct *p); |
| 79 | |
| Ley Foon Tan | 71995e4 | 2014-11-06 15:19:47 +0800 | [diff] [blame] | 80 | #define task_pt_regs(p) \ |
| 81 | ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1) |
| 82 | |
| 83 | /* Used by procfs */ |
| 84 | #define KSTK_EIP(tsk) ((tsk)->thread.kregs->ea) |
| 85 | #define KSTK_ESP(tsk) ((tsk)->thread.kregs->sp) |
| 86 | |
| 87 | #define cpu_relax() barrier() |
| Ley Foon Tan | 71995e4 | 2014-11-06 15:19:47 +0800 | [diff] [blame] | 88 | |
| 89 | #endif /* __ASSEMBLY__ */ |
| 90 | |
| 91 | #endif /* _ASM_NIOS2_PROCESSOR_H */ |