1 /* 2 * Copyright 2010, Ingo Weinhold, ingo_weinhold@gmx.de. 3 * Copyright 2005-2009, Axel Dörfler, axeld@pinc-software.de. 4 * Distributed under the terms of the MIT License. 5 * 6 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 7 * Distributed under the terms of the NewOS License. 8 */ 9 #ifndef KERNEL_ARCH_ARM_PAGING_ARM_PAGING_STRUCTURES_H 10 #define KERNEL_ARCH_ARM_PAGING_ARM_PAGING_STRUCTURES_H 11 12 13 #include <SupportDefs.h> 14 15 #include <heap.h> 16 17 18 struct ARMPagingStructures : DeferredDeletable { 19 uint32 pgdir_phys; 20 vint32 ref_count; 21 vint32 active_on_cpus; 22 // mask indicating on which CPUs the map is currently used 23 24 ARMPagingStructures(); 25 virtual ~ARMPagingStructures(); 26 27 inline void AddReference(); 28 inline void RemoveReference(); 29 30 virtual void Delete() = 0; 31 }; 32 33 34 inline void 35 ARMPagingStructures::AddReference() 36 { 37 atomic_add(&ref_count, 1); 38 } 39 40 41 inline void 42 ARMPagingStructures::RemoveReference() 43 { 44 if (atomic_add(&ref_count, -1) == 1) 45 Delete(); 46 } 47 48 49 #endif // KERNEL_ARCH_ARM_PAGING_ARM_PAGING_STRUCTURES_H 50