163 lines
4.2 KiB
C
Executable File
163 lines
4.2 KiB
C
Executable File
/**
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* @file map.c
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* @author ATShining (1358745329@qq.com)
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* @brief
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* @version 0.1
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* @date 2023-09-29
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*
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* @copyright Copyright (c) 2023
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*
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*/
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#include "map.h"
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#include "types.h"
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#include "obj_space.h"
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#include "kobject.h"
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#include "assert.h"
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#include "cpulock.h"
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bool_t obj_map_root(kobject_t *kobj, obj_space_t *obj_space, ram_limit_t *ram, vpage_t page)
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{
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kobj_del_list_t kobj_list;
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kobj_del_list_init(&kobj_list);
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if (obj_space_lookup_kobj(obj_space, vpage_get_obj_handler(page)))
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{ //!< 已经存在则删除
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obj_unmap(obj_space, page, &kobj_list);
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}
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umword_t status = cpulock_lock();
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kobj_del_list_to_do(&kobj_list);
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cpulock_set(status);
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obj_map_entry_t *map = obj_space_insert(obj_space, ram, kobj, vpage_get_obj_handler(page), vpage_get_attrs(page));
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if (!map)
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{
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return FALSE;
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}
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kobj->mappable.map_cnt++;
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slist_add(&kobj->mappable.node, &map->node);
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return TRUE;
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}
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/**
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* @brief 从源映射到目的，如果目的中已经存在，则先解除目的映射然后在影视
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*
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* @param dst_space
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* @param src_space
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* @param dst_inx
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* @param src_inx
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* @param ram
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* @param del_attrs
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* @return int
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*/
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int obj_map_src_dst(obj_space_t *dst_space, obj_space_t *src_space,
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obj_handler_t dst_inx, obj_handler_t src_inx,
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ram_limit_t *ram, uint8_t del_attrs, kobj_del_list_t *del_list)
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{
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obj_map_entry_t *entry_obj =
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obj_space_lookup(src_space, src_inx);
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if (!entry_obj)
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{
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return -ENOENT;
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}
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if (!entry_obj->obj)
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{
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return -ENOENT;
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}
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if (obj_space_lookup_kobj(dst_space, dst_inx))
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{ //!< 已经存在则解除注释
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obj_unmap(dst_space, vpage_create3(0, 0, dst_inx), del_list);
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printk("unmap:%d \n", dst_inx);
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}
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return obj_map(dst_space, dst_inx, obj_map_entry_kobj_get(entry_obj),
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ram, obj_map_entry_get_attr(entry_obj) & (~(del_attrs & 0x3UL)));
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}
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int obj_map(obj_space_t *obj_space, obj_handler_t inx, kobject_t *insert_kobj, ram_limit_t *ram, uint8_t attrs)
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{
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obj_map_entry_t *entry = NULL;
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entry = obj_space_lookup(obj_space, inx);
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if (entry)
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{
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if (obj_map_kobj_get(entry->obj))
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{
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return -EACCES;
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}
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}
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obj_map_entry_t *map = obj_space_insert(obj_space, ram, insert_kobj, inx, attrs);
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if (!map)
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{
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return -ENOMEM;
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}
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insert_kobj->mappable.map_cnt++;
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slist_add(&insert_kobj->mappable.node, &map->node);
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return 0;
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}
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void obj_unmap(obj_space_t *obj_space, vpage_t vpage, kobj_del_list_t *del_list)
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{
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obj_map_entry_t *entry = NULL;
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entry = obj_space_lookup(obj_space, vpage_get_obj_handler(vpage));
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if (!entry)
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{
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return;
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}
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kobject_t *kobj = obj_map_entry_kobj_get(entry);
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if (!kobj)
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{
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return;
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}
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if (kobj->unmap_func)
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{
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kobj->unmap_func(obj_space, kobj);
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}
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if ((vpage.attrs & KOBJ_DELETE_RIGHT) &&
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(obj_map_entry_get_attr(entry) & KOBJ_DELETE_RIGHT))
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{
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//!< 代表删除所有
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obj_map_entry_t *pos;
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slist_foreach_not_next(pos, &kobj->mappable.node, node)
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{
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obj_map_entry_t *next = slist_next_entry(pos, &kobj->mappable.node, node);
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slist_del(&pos->node);
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pos->obj = NULL;
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// 删除一个
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kobj->mappable.map_cnt--;
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if (kobj->mappable.map_cnt <= 0)
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{
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if (del_list)
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{
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kobj_del_list_add(del_list, &kobj->del_node);
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}
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}
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pos = next;
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}
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}
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else
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{
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assert(!slist_is_empty(&entry->node));
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slist_del(&entry->node);
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entry->obj = NULL;
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// 删除一个
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kobj->mappable.map_cnt--;
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if (kobj->mappable.map_cnt <= 0)
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{
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if (del_list)
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{
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kobj_del_list_add(del_list, &kobj->del_node);
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}
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}
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}
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}
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void obj_unmap_all(obj_space_t *obj_space, kobj_del_list_t *del_list)
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{
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assert(obj_space);
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for (umword_t i = 0; i < OBJ_MAP_MAX_ADDR; i++)
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{
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obj_unmap(obj_space, vpage_create3(KOBJ_DELETE_RIGHT /*执行删除操作*/, 0, i), del_list);
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}
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}
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