32 …struct scm_buffer_info_t *buf = (struct scm_buffer_info_t *)kmalloc(sizeof(struct scm_buffer_info_…  in __create_buffer()  local
33     if (buf == NULL)  in __create_buffer()
35     memset(buf, 0, sizeof(struct scm_buffer_info_t));  in __create_buffer()
36     buf->bit_depth = video_frame_buffer_info.bit_depth;  in __create_buffer()
37     buf->flags = SCM_BF_DB;  in __create_buffer()
40         buf->flags |= SCM_BF_PIXEL;  in __create_buffer()
42         buf->flags |= SCM_BF_TEXT;  in __create_buffer()
43     buf->height = video_frame_buffer_info.height;  in __create_buffer()
44     buf->width = video_frame_buffer_info.width;  in __create_buffer()
45     buf->size = video_frame_buffer_info.size;  in __create_buffer()
50     buf->vaddr = (uint64_t)phys_2_virt(p->addr_phys);  in __create_buffer()
51     return buf;  in __create_buffer()
53     kfree(buf);  in __create_buffer()
63 static int __destroy_buffer(struct scm_buffer_info_t *buf)  in __destroy_buffer()  argument
66     if (unlikely(buf == &video_frame_buffer_info || buf == NULL))  in __destroy_buffer()
68     if (unlikely(buf->vaddr == NULL))  in __destroy_buffer()
70     if (unlikely(verify_area(buf->vaddr, buf->size) == true))  in __destroy_buffer()
73     if (buf->flags & SCM_BF_FB)  in __destroy_buffer()
77 …free_pages(Phy_to_2M_Page(virt_2_phys(buf->vaddr)), PAGE_2M_ALIGN(video_frame_buffer_info.size) / …  in __destroy_buffer()
148     ui->buf = __create_buffer(ui->type);  in scm_register_alloc()
149     if ((uint64_t)(ui->buf) == (uint64_t)-ENOMEM)  in scm_register_alloc()
158     ui->ui_ops->install(ui->buf);  in scm_register_alloc()
183     ui->buf = __create_buffer(ui->type);  in scm_register()
185     if ((uint64_t)(ui->buf) == (uint64_t)-ENOMEM)  in scm_register()
192     ui->ui_ops->install(ui->buf);  in scm_register()
252         if (ptr->buf == &video_frame_buffer_info)  in scm_enable_double_buffer()
255             struct scm_buffer_info_t *buf = __create_buffer(SCM_BF_DB | SCM_BF_PIXEL);  in scm_enable_double_buffer()  local
256             if ((uint64_t)(buf) == (uint64_t)-ENOMEM)  in scm_enable_double_buffer()
260             if (ptr->ui_ops->change(buf) != 0) // 这里的change回调函数不会是空指针吗 问题2  in scm_enable_double_buffer()
263                 __destroy_buffer(buf);  in scm_enable_double_buffer()
264                 kfree(buf);  in scm_enable_double_buffer()
271     video_set_refresh_target(__current_framework->buf);  in scm_enable_double_buffer()
286     if (ui->buf->vaddr == NULL)  in scm_framework_enable()
293         retval = video_set_refresh_target(ui->buf);  in scm_framework_enable()
318         if (ptr->buf == &video_frame_buffer_info)  in scm_reinit()