49 lines
2.0 KiB
C
49 lines
2.0 KiB
C
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/*
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** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
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** Distributed under the terms of the NewOS License.
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*/
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#ifndef _NEWOS_KERNEL_ARCH_VM_TRANSLATION_MAP_H
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#define _NEWOS_KERNEL_ARCH_VM_TRANSLATION_MAP_H
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#include <kernel.h>
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#include <stage2.h>
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#include <lock.h>
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typedef struct vm_translation_map_struct {
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struct vm_translation_map_struct *next;
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struct vm_translation_map_ops_struct *ops;
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recursive_lock lock;
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int map_count;
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struct vm_translation_map_arch_info_struct *arch_data;
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} vm_translation_map;
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// table of operations the vm may want to do to this mapping
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typedef struct vm_translation_map_ops_struct {
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void (*destroy)(vm_translation_map *);
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int (*lock)(vm_translation_map*);
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int (*unlock)(vm_translation_map*);
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int (*map)(vm_translation_map *map, addr va, addr pa, unsigned int attributes);
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int (*unmap)(vm_translation_map *map, addr start, addr end);
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int (*query)(vm_translation_map *map, addr va, addr *out_physical, unsigned int *out_flags);
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addr (*get_mapped_size)(vm_translation_map*);
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int (*protect)(vm_translation_map *map, addr base, addr top, unsigned int attributes);
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int (*clear_flags)(vm_translation_map *map, addr va, unsigned int flags);
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void (*flush)(vm_translation_map *map);
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int (*get_physical_page)(addr physical_address, addr *out_virtual_address, int flags);
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int (*put_physical_page)(addr virtual_address);
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} vm_translation_map_ops;
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int vm_translation_map_create(vm_translation_map *new_map, bool kernel);
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int vm_translation_map_module_init(kernel_args *ka);
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int vm_translation_map_module_init2(kernel_args *ka);
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void vm_translation_map_module_init_post_sem(kernel_args *ka);
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// quick function to map a page in regardless of map context. Used in VM initialization,
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// before most vm data structures exist
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int vm_translation_map_quick_map(kernel_args *ka, addr va, addr pa, unsigned int attributes, addr (*get_free_page)(kernel_args *));
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// quick function to return the physical pgdir of a mapping, needed for a context switch
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addr vm_translation_map_get_pgdir(vm_translation_map *map);
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#endif
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