1 /* 2 * Copyright 2003-2011, Haiku Inc. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Axel Dörfler <axeld@pinc-software.de> 7 * Ingo Weinhold <bonefish@cs.tu-berlin.de> 8 */ 9 #ifndef _KERNEL_ARCH_M68K_THREAD_H 10 #define _KERNEL_ARCH_M68K_THREAD_H 11 12 #include <arch/cpu.h> 13 #include <arch/thread.h> 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 void m68k_push_iframe(struct iframe_stack *stack, struct iframe *frame); 20 void m68k_pop_iframe(struct iframe_stack *stack); 21 struct iframe *m68k_get_user_iframe(void); 22 23 /* as we won't support SMP on m68k (yet?) we can use a global here */ 24 extern Thread *gCurrentThread; 25 26 extern inline Thread * 27 arch_thread_get_current_thread(void) 28 { 29 return gCurrentThread; 30 } 31 32 33 extern inline void 34 arch_thread_set_current_thread(Thread *t) 35 { 36 gCurrentThread = t; 37 } 38 39 #if 0 40 /* this would only work on 030... */ 41 42 extern inline Thread * 43 arch_thread_get_current_thread(void) 44 { 45 uint64 v = 0; 46 asm volatile("pmove %%srp,(%0)" : : "a"(&v)); 47 return (Thread *)(uint32)(v & 0xffffffff); 48 } 49 50 51 extern inline void 52 arch_thread_set_current_thread(Thread *t) 53 { 54 uint64 v; 55 asm volatile("pmove %%srp,(%0)\n" \ 56 "move %1,(4,%0)\n" \ 57 "pmove (%0),%%srp" : : "a"(&v), "d"(t)); 58 } 59 #endif 60 61 #ifdef __cplusplus 62 } 63 #endif 64 65 66 #endif /* _KERNEL_ARCH_M68K_THREAD_H */ 67