实现屏幕管理器大致的框架

.vscode/settings.json

@@ -116,7 +116,8 @@
         "apic_timer.h": "c",
         "sched.h": "c",
         "preempt.h": "c",
-        "softirq.h": "c"
+        "softirq.h": "c",
+        "screen_manager.h": "c"
     },
     "C_Cpp.errorSquiggles": "Enabled",
     "esbonio.sphinx.confDir": ""

Makefile

@@ -7,7 +7,7 @@ export ARCH=__x86_64__
 export ROOT_PATH=$(shell pwd)
 
 export DEBUG=DEBUG
-export GLOBAL_CFLAGS := -mcmodel=large -fno-builtin -m64  -fno-stack-protector -D $(ARCH) -O1
+export GLOBAL_CFLAGS := -mcmodel=large -fno-builtin -m64  -fno-stack-protector -D $(ARCH) -O0
 
 ifeq ($(DEBUG), DEBUG)
 GLOBAL_CFLAGS += -g 

kernel/common/printk.c

@@ -103,38 +103,17 @@ int printk_init(const int char_size_x, const int char_size_y)
     // 初始化自旋锁
     spin_init(&printk_lock);
 
-    // ======== 临时的将物理地址填写到0x0000000003000000处 之后会在mm内将帧缓存区重新映射=====
-
-    ul global_CR3 = (ul)get_CR3();
-    ul fb_virt_addr = (ul)pos.FB_address;
-    ul fb_phys_addr = VBE_FB_phys_addr;
-
-    // 计算帧缓冲区的线性地址对应的pml4页表项的地址
-    ul *tmp = phys_2_virt((ul *)((ul)global_CR3 & (~0xfffUL)) + ((fb_virt_addr >> PAGE_GDT_SHIFT) & 0x1ff));
-
-    tmp = phys_2_virt((ul *)(*tmp & (~0xfffUL)) + ((fb_virt_addr >> PAGE_1G_SHIFT) & 0x1ff));
-
-    ul *tmp1;
-    // 初始化2M物理页
-    for (ul i = 0; i < (pos.FB_length << 2); i += PAGE_2M_SIZE)
-    {
-        // 计算当前2M物理页对应的pdt的页表项的物理地址
-        tmp1 = phys_2_virt((ul *)(*tmp & (~0xfffUL)) + (((fb_virt_addr + i) >> PAGE_2M_SHIFT) & 0x1ff));
-
-        // 页面写穿，禁止缓存
-        set_pdt(tmp1, mk_pdt((ul)fb_phys_addr + i, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD));
-    }
-
-    flush_tlb();
-
     pos.x = 0;
     pos.y = 0;
 
     cls();
     
+    io_mfence();
     kdebug("width=%d\theight=%d", pos.width, pos.height);
     // 由于此时系统并未启用双缓冲，因此关闭滚动动画
     printk_disable_animation();
+
+    io_mfence();
     return 0;
 }
 
@@ -960,4 +939,3 @@ int sprintk(char *buf, const char *fmt, ...)
 
     return count;
 }
-

kernel/driver/video/video.c

@@ -8,62 +8,37 @@
 #include <mm/slab.h>
 #include <common/spinlock.h>
 #include <exception/softirq.h>
+#include <driver/uart/uart.h>
+#include <common/time.h>
+
 
-// 每个时刻只能有1个进程新增定时任务
-spinlock_t video_timer_func_add_lock;
 
 uint64_t video_refresh_expire_jiffies = 0;
 uint64_t video_last_refresh_pid = -1;
 
+struct scm_buffer_info_t video_frame_buffer_info = {0};
+static struct multiboot_tag_framebuffer_info_t __fb_info;
+static struct scm_buffer_info_t *video_refresh_target = NULL;
+
 #define REFRESH_INTERVAL 15UL // 启动刷新帧缓冲区任务的时间间隔
 
 ul VBE_FB_phys_addr; // 由bootloader传来的帧缓存区的物理地址
-struct screen_info_t
-{
-    int width, height;
-    uint64_t length;
-    uint64_t fb_vaddr, fb_paddr;
-    uint64_t double_fb_vaddr;
-} sc_info;
 
 /**
  * @brief VBE帧缓存区的地址重新映射
  * 将帧缓存区映射到地址SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE处
  */
-void init_frame_buffer(bool level)
+void init_frame_buffer()
 {
     kinfo("Re-mapping VBE frame buffer...");
 
     uint64_t global_CR3 = (uint64_t)get_CR3();
 
-    if (level == false)
-    {
     struct multiboot_tag_framebuffer_info_t info;
     int reserved;
 
-        multiboot2_iter(multiboot2_get_Framebuffer_info, &info, &reserved);
+    video_frame_buffer_info.vaddr = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + FRAME_BUFFER_MAPPING_OFFSET;
-
+    mm_map_proc_page_table(global_CR3, true, video_frame_buffer_info.vaddr, __fb_info.framebuffer_addr, video_frame_buffer_info.size, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false, true, false);
-        sc_info.fb_vaddr = SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE + FRAME_BUFFER_MAPPING_OFFSET;
-
-        sc_info.fb_paddr = info.framebuffer_addr;
-        sc_info.width = info.framebuffer_width;
-        sc_info.height = info.framebuffer_height;
-
-        sc_info.length = 1UL * sc_info.width * sc_info.height;
-        mm_map_proc_page_table(global_CR3, true, sc_info.fb_vaddr, sc_info.fb_paddr, get_VBE_FB_length() << 2, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false, true, false);
-        set_pos_VBE_FB_addr((uint *)sc_info.fb_vaddr);
-    }
-    else // 高级初始化，增加双缓冲区的支持
-    {
-        // 申请双重缓冲区
-        struct Page *p = alloc_pages(ZONE_NORMAL, PAGE_2M_ALIGN(sc_info.length << 2) / PAGE_2M_SIZE, 0);
-        sc_info.double_fb_vaddr = (uint64_t)phys_2_virt(p->addr_phys);
-        mm_map_proc_page_table(global_CR3, true, sc_info.double_fb_vaddr, p->addr_phys, PAGE_2M_ALIGN(sc_info.length << 2), PAGE_KERNEL_PAGE, false, true, false);
-
-        // 将原有的数据拷贝到double buffer里面
-        memcpy((void *)sc_info.double_fb_vaddr, (void *)sc_info.fb_vaddr, sc_info.length << 2);
-        set_pos_VBE_FB_addr((uint *)sc_info.double_fb_vaddr);
-    }
 
     flush_tlb();
     kinfo("VBE frame buffer successfully Re-mapped!");
@@ -76,7 +51,9 @@ void init_frame_buffer(bool level)
 void video_refresh_framebuffer(void *data)
 {
     video_refresh_expire_jiffies = cal_next_n_ms_jiffies(REFRESH_INTERVAL << 1);
-    memcpy((void *)sc_info.fb_vaddr, (void *)sc_info.double_fb_vaddr, (sc_info.length << 2));
+    if (unlikely(video_refresh_target == NULL))
+        return;
+    memcpy((void *)video_frame_buffer_info.vaddr, (void *)video_refresh_target->vaddr, video_refresh_target->size);
 }
 
 /**
@@ -86,22 +63,86 @@ void video_refresh_framebuffer(void *data)
  * true ->高级初始化：增加double buffer的支持
  * @return int
  */
-int video_init(bool level)
+int video_reinitialize(bool level)
 {
-    init_frame_buffer(level);
+    if (level == false)
-    if (level)
+        init_frame_buffer();
+    else
     {
-        spin_init(&video_timer_func_add_lock);
+        // 启用屏幕刷新软中断
-        // 启用双缓冲后，使能printk滚动动画
-        // printk_enable_animation();
-        // 初始化第一个屏幕刷新任务
-        // struct timer_func_list_t *tmp = (struct timer_func_list_t *)kmalloc(sizeof(struct timer_func_list_t), 0);
-        // timer_func_init(tmp, &video_refresh_framebuffer, NULL, 10*REFRESH_INTERVAL);
-        // timer_func_add(tmp);
         register_softirq(VIDEO_REFRESH_SIRQ, &video_refresh_framebuffer, NULL);
 
         video_refresh_expire_jiffies = cal_next_n_ms_jiffies(10 * REFRESH_INTERVAL);
 
         raise_softirq(VIDEO_REFRESH_SIRQ);
     }
+    return 0;
+}
+
+/**
+ * @brief 设置帧缓冲区刷新目标
+ *
+ * @param buf
+ * @return int
+ */
+int video_set_refresh_target(struct scm_buffer_info_t *buf)
+{
+
+    unregister_softirq(VIDEO_REFRESH_SIRQ);
+    int counter = 100;
+    while ((get_softirq_pending() & (1 << VIDEO_REFRESH_SIRQ)) && counter > 0)
+    {
+        --counter;
+        usleep(1000);
+    }
+    video_refresh_target = buf;
+    register_softirq(VIDEO_REFRESH_SIRQ, &video_refresh_framebuffer, NULL);
+    raise_softirq(VIDEO_REFRESH_SIRQ);
+}
+
+/**
+ * @brief 初始化显示驱动
+ *
+ * @return int
+ */
+int video_init()
+{
+
+    memset(&video_frame_buffer_info, 0, sizeof(struct scm_buffer_info_t));
+    memset(&__fb_info, 0, sizeof(struct multiboot_tag_framebuffer_info_t));
+    video_refresh_target = NULL;
+
+    io_mfence();
+    // 从multiboot2获取帧缓冲区信息
+    int reserved;
+    multiboot2_iter(multiboot2_get_Framebuffer_info, &__fb_info, &reserved);
+    io_mfence();
+
+    // 初始化帧缓冲区信息结构体
+    if (__fb_info.framebuffer_type == 2)
+    {
+        video_frame_buffer_info.bit_depth = 8; // type=2时，width和height是按照字符数来表示的，因此depth=8
+        video_frame_buffer_info.flags |= SCM_BF_TEXT;
+    }
+    else
+    {
+        video_frame_buffer_info.bit_depth = __fb_info.framebuffer_bpp;
+        video_frame_buffer_info.flags |= SCM_BF_PIXEL;
+    }
+
+    video_frame_buffer_info.flags |= SCM_BF_FB;
+    video_frame_buffer_info.width = __fb_info.framebuffer_width;
+    video_frame_buffer_info.height = __fb_info.framebuffer_height;
+    io_mfence();
+
+    video_frame_buffer_info.size = video_frame_buffer_info.width * video_frame_buffer_info.height * ((video_frame_buffer_info.bit_depth + 7) / 8);
+    // 先临时映射到该地址，稍后再重新映射
+    video_frame_buffer_info.vaddr = 0xffff800003000000;
+    mm_map_phys_addr(video_frame_buffer_info.vaddr, __fb_info.framebuffer_addr, video_frame_buffer_info.size, PAGE_KERNEL_PAGE | PAGE_PWT | PAGE_PCD, false);
+
+    io_mfence();
+    char init_text2[] = "Video driver initialized.";
+    for (int i = 0; i < sizeof(init_text2) - 1; ++i)
+        uart_send(COM1, init_text2[i]);
+    return 0;
 }

kernel/driver/video/video.h

@@ -1,15 +1,31 @@
 #pragma once
 #include <common/glib.h>
 #include <stdbool.h>
+#include <lib/libUI/screen_manager.h>
 
 /**
- * @brief 初始化显示模块，需先低级初始化才能高级初始化
+ * @brief 重新初始化显示驱动，需先低级初始化才能高级初始化
  * @param level 初始化等级
  * false -> 低级初始化：不使用double buffer
  * true ->高级初始化：增加double buffer的支持
  * @return int
  */
-int video_init(bool level);
+int video_reinitialize(bool level);
+
+/**
+ * @brief 初始化显示驱动
+ *
+ * @return int
+ */
+int video_init();
+
+/**
+ * @brief 设置帧缓冲区刷新目标
+ * 
+ * @param buf 
+ * @return int 
+ */
+int video_set_refresh_target(struct scm_buffer_info_t *buf);
 
 extern uint64_t video_refresh_expire_jiffies;
 extern uint64_t video_last_refresh_pid;

kernel/lib/libUI/screen_manager.c

@@ -1 +1,268 @@
 #include "screen_manager.h"
+#include <driver/multiboot2/multiboot2.h>
+#include <common/kprint.h>
+#include <common/spinlock.h>
+#include <mm/mm.h>
+#include <mm/slab.h>
+#include <driver/uart/uart.h>
+#include <driver/video/video.h>
+
+extern const struct scm_buffer_info_t video_frame_buffer_info;
+static struct List scm_framework_list;
+static spinlock_t scm_register_lock; // 框架注册锁
+static uint32_t scm_ui_max_id = 0;
+static bool __scm_alloc_enabled = false;         // 允许动态申请内存的标志位
+static bool __scm_double_buffer_enabled = false; // 允许双缓冲的标志位
+
+/**
+ * @brief 初始化屏幕管理模块
+ *
+ */
+#pragma GCC push_options
+#pragma GCC optimize("O0")
+
+/**
+ * @brief 创建新的帧缓冲区
+ *
+ * @param type 帧缓冲区类型
+ * @return struct scm_buffer_info_t* 新的帧缓冲区结构体
+ */
+static struct scm_buffer_info_t *__create_buffer(uint64_t type)
+{
+    // 若未启用双缓冲，则直接返回帧缓冲区
+    if (unlikely(__scm_double_buffer_enabled == false))
+        return &video_frame_buffer_info;
+
+    struct scm_buffer_info_t *buf = (struct scm_buffer_info_t *)kmalloc(sizeof(struct scm_buffer_info_t), 0);
+    if (buf == NULL)
+        return -ENOMEM;
+    memset(buf, 0, sizeof(struct scm_buffer_info_t));
+    buf->bit_depth = video_frame_buffer_info.bit_depth;
+    buf->flags = SCM_BF_DB;
+
+    if (type & SCM_BF_PIXEL)
+        buf->flags |= SCM_BF_PIXEL;
+    else
+        buf->flags |= SCM_BF_TEXT;
+    buf->height = video_frame_buffer_info.height;
+    buf->width = video_frame_buffer_info.width;
+    buf->size = video_frame_buffer_info.size;
+
+    struct Page *p = alloc_pages(ZONE_NORMAL, PAGE_2M_ALIGN(video_frame_buffer_info.size) / PAGE_2M_SIZE, 0);
+    if (p == NULL)
+        goto failed;
+    buf->vaddr = (uint64_t)phys_2_virt(p->addr_phys);
+    return buf;
+failed:;
+    kfree(buf);
+    return -ENOMEM;
+}
+
+/**
+ * @brief 销毁双缓冲区
+ *
+ * @param buf
+ * @return int
+ */
+static int __destroy_buffer(struct scm_buffer_info_t *buf)
+{
+    // 不能销毁帧缓冲区对象
+    if (unlikely(buf == &video_frame_buffer_info || buf == NULL))
+        return -EINVAL;
+    if (unlikely(buf->vaddr == NULL))
+        return -EINVAL;
+    if (unlikely(verify_area(buf->vaddr, buf->size) == true))
+        return -EINVAL;
+    // 是否双缓冲区
+    if (buf->flags & SCM_BF_FB)
+        return -EINVAL;
+
+    // 释放内存页
+    free_pages(Phy_to_2M_Page(virt_2_phys(buf->vaddr)), PAGE_2M_ALIGN(video_frame_buffer_info.size) / PAGE_2M_SIZE);
+    return 0;
+}
+
+void scm_init()
+{
+    list_init(&scm_framework_list);
+    spin_init(&scm_register_lock);
+    scm_ui_max_id = 0;
+    __scm_alloc_enabled = false;         // 禁用动态申请内存
+    __scm_double_buffer_enabled = false; // 禁用双缓冲
+}
+/**
+ * @brief 检查ui框架结构体中的参数设置是否合法
+ *
+ * @param name 框架名称
+ * @param type 框架类型
+ * @param ops 框架的操作
+ * @return int
+ */
+static int __check_ui_param(const char *name, const uint8_t type, const struct scm_ui_framework_operations_t *ops)
+{
+    if (name == NULL)
+        return -EINVAL;
+    if (type != SCM_FRAMWORK_TYPE_GUI || type != SCM_FRAMWORK_TYPE_TEXT)
+        return -EINVAL;
+    if (ops == NULL)
+        return -EINVAL;
+    if (ops->install == NULL || ops->uninstall == NULL || ops->enable == NULL || ops->disable == NULL || ops->change == NULL)
+        return -EINVAL;
+
+    return 0;
+}
+/**
+ * @brief 向屏幕管理器注册UI框架（动态获取框架对象结构体）
+ *
+ * @param name 框架名
+ * @param type 类型
+ * @param ops 框架操作方法
+ * @return int
+ */
+int scm_register_alloc(const char *name, const uint8_t type, struct scm_ui_framework_operations_t *ops)
+{
+    // 若未启用动态申请，则返回。
+    if (unlikely(__scm_alloc_enabled == false))
+        return -EAGAIN;
+
+    // 检查参数合法性
+    if (__check_ui_param(name, type, ops) != 0)
+        return -EINVAL;
+
+    struct scm_ui_framework_t *ui = (struct scm_ui_framework_t *)kmalloc(sizeof(struct scm_ui_framework_t *), 0);
+    memset(ui, 0, sizeof(struct scm_ui_framework_t));
+    strncpy(ui->name, name, 15);
+    ui->type = type;
+    ui->ui_ops = ops;
+    list_init(&ui->list);
+
+    spin_lock(&scm_register_lock);
+    ui->id = scm_ui_max_id++;
+    spin_unlock(&scm_register_lock);
+
+    // 创建帧缓冲区
+    ui->buf = __create_buffer(ui->type);
+    if ((uint64_t)(ui->buf) == (uint64_t)-ENOMEM)
+    {
+        kfree(ui);
+        return -ENOMEM;
+    }
+    // 把ui框架加入链表
+    list_add(&scm_framework_list, &ui->list);
+
+    // 调用ui框架的回调函数以安装ui框架，并将其激活
+    ui->ui_ops->install(ui->buf);
+    ui->ui_ops->enable(NULL);
+    return 0;
+}
+
+/**
+ * @brief 向屏幕管理器注册UI框架（静态设置的框架对象）
+ *
+ * @param ui 框架结构体指针
+ * @return int 错误码
+ */
+int scm_register(struct scm_ui_framework_t *ui)
+{
+    if (ui == NULL)
+        return -EINVAL;
+    if (__check_ui_param(ui->name, ui->type, ui->ui_ops) != 0)
+        return -EINVAL;
+
+    list_init(&ui->list);
+    spin_lock(&video_frame_buffer_info);
+    ui->id = scm_ui_max_id++;
+    spin_unlock(&video_frame_buffer_info);
+
+    ui->buf = __create_buffer(ui->type);
+    if ((uint64_t)(ui->buf) == (uint64_t)-ENOMEM)
+        return -ENOMEM;
+
+    // 把ui框架加入链表
+    list_add(&scm_framework_list, &ui->list);
+
+    // 调用ui框架的回调函数以安装ui框架，并将其激活
+    ui->ui_ops->install(ui->buf);
+    ui->ui_ops->enable(NULL);
+    return 0;
+}
+
+/**
+ * @brief 向屏幕管理器卸载UI框架
+ *
+ * @param ui ui框架结构体
+ * @return int
+ */
+int scm_unregister(struct scm_ui_framework_t *ui)
+{
+}
+
+/**
+ * @brief 向屏幕管理器卸载动态创建的UI框架
+ *
+ * @param ui ui框架结构体
+ * @return int
+ */
+int scm_unregister_alloc(struct scm_ui_framework_t *ui)
+{
+}
+
+/**
+ * @brief 允许动态申请内存
+ *
+ * @return int
+ */
+int scm_enable_alloc()
+{
+    __scm_alloc_enabled = true;
+    return 0;
+}
+
+/**
+ * @brief 允许双缓冲区
+ *
+ * @return int
+ */
+int scm_enable_double_buffer()
+{
+    __scm_double_buffer_enabled = true;
+    if (list_empty(&scm_framework_list))
+        return 0;
+
+    // 逐个检查已经注册了的ui框架，将其缓冲区更改为双缓冲
+    struct scm_ui_framework_t *ptr = container_of(list_next(&scm_framework_list), struct scm_ui_framework_t, list);
+    do
+    {
+        if (ptr->buf == &video_frame_buffer_info)
+        {
+            struct scm_buffer_info_t *buf = __create_buffer(SCM_BF_DB | SCM_BF_PIXEL);
+            if ((uint64_t)(buf) == (uint64_t)-ENOMEM)
+                return -ENOMEM;
+            if (ptr->ui_ops->change(buf) != 0)
+            {
+                __destroy_buffer(buf);
+                kfree(buf);
+            }
+        }
+    } while (list_next(&ptr->list) != &scm_framework_list);
+
+    // 通知显示驱动，启动双缓冲
+    video_reinitialize(true);
+    return 0;
+}
+
+/**
+ * @brief 启用某个ui框架，将它的帧缓冲区渲染到屏幕上
+ *
+ * @param ui 要启动的ui框架
+ * @return int 返回码
+ */
+int scm_framework_enable(struct scm_ui_framework_t *ui)
+{
+    if (ui->buf->vaddr == NULL)
+        return -EINVAL;
+
+    return video_set_refresh_target(ui->buf);
+}
+
+#pragma GCC pop_options

kernel/lib/libUI/screen_manager.h

@@ -1 +1,112 @@
 #pragma once
+#include <common/sys/types.h>
+#include <common/glib.h>
+
+// 帧缓冲区标志位
+#define SCM_BF_FB (1 << 0)    // 当前buffer是设备显存中的帧缓冲区
+#define SCM_BF_DB (1 << 1)    // 当前buffer是双缓冲
+#define SCM_BF_TEXT (1 << 2)  // 使用文本模式
+#define SCM_BF_PIXEL (1 << 3) // 使用图像模式
+
+// ui框架类型
+#define SCM_FRAMWORK_TYPE_TEXT 0
+#define SCM_FRAMWORK_TYPE_GUI 1
+
+/**
+ * @brief 帧缓冲区信息结构体
+ *
+ */
+struct scm_buffer_info_t
+{
+    uint32_t width;     // 帧缓冲区宽度（pixel或columns）
+    uint32_t height;    // 帧缓冲区高度（pixel或lines）
+    uint32_t size;      // 帧缓冲区大小（bytes）
+    uint32_t bit_depth; // 像素点位深度
+
+    uint64_t vaddr; // 帧缓冲区的地址
+    uint64_t flags; // 帧缓冲区标志位
+};
+
+/**
+ * @brief 上层ui框架应当实现的接口
+ *
+ */
+struct scm_ui_framework_operations_t
+{
+    int (*install)(struct scm_buffer_info_t *buf);
+    int (*uninstall)(void *args);
+    int (*enable)(void *args);
+    int (*disable)(void *args);
+    int (*change)(struct scm_buffer_info_t *buf);
+};
+struct scm_ui_framework_t
+{
+    struct List list;
+    uint16_t id;
+    char name[16];
+    uint8_t type;
+    struct scm_ui_framework_operations_t *ui_ops;
+    struct scm_buffer_info_t *buf;
+}__attribute__((aligned(sizeof(uint64_t))));
+
+/**
+ * @brief 初始化屏幕管理模块
+ *
+ */
+void scm_init();
+
+/**
+ * @brief 向屏幕管理器注册UI框架（动态获取框架对象结构体）
+ * 
+ * @param name 框架名
+ * @param type 类型
+ * @param ops 框架操作方法
+ * @return int 
+ */
+int scm_register_alloc(const char* name, const uint8_t type, struct scm_ui_framework_operations_t * ops);
+
+/**
+ * @brief 向屏幕管理器注册UI框架（静态设置的框架对象）
+ * 
+ * @param ui 框架结构体指针
+ * @return int 错误码
+ */
+int scm_register(struct scm_ui_framework_t*ui);
+
+/**
+ * @brief 向屏幕管理器卸载UI框架
+ * 
+ * @param ui ui框架结构体
+ * @return int 
+ */
+int scm_unregister(struct scm_ui_framework_t*ui);
+
+/**
+ * @brief 向屏幕管理器卸载动态创建的UI框架
+ * 
+ * @param ui ui框架结构体
+ * @return int 
+ */
+int scm_unregister_alloc(struct scm_ui_framework_t*ui);
+
+/**
+ * @brief 允许动态申请内存
+ * 
+ * @return int 
+ */
+int scm_enable_alloc();
+
+/**
+ * @brief 允许双缓冲区
+ * 
+ * @return int 
+ */
+int scm_enable_double_buffer();
+
+/**
+ * @brief 启用某个ui框架，将它的帧缓冲区渲染到屏幕上
+ * 
+ * @param ui 要启动的ui框架
+ * @return int 返回码
+ */
+int scm_framework_enable(struct scm_ui_framework_t*ui);

kernel/main.c

@@ -9,6 +9,7 @@
 #include "exception/trap.h"
 #include "exception/irq.h"
 #include <exception/softirq.h>
+#include <lib/libUI/screen_manager.h>
 #include "mm/mm.h"
 #include "mm/slab.h"
 #include "process/process.h"
@@ -34,12 +35,10 @@
 #include <driver/video/video.h>
 
 #include <driver/interrupt/apic/apic_timer.h>
-#pragma GCC push_options
+
-#pragma GCC optimize("O3")
 unsigned int *FR_address = (unsigned int *)0xb8000; //帧缓存区的地址
 ul bsp_idt_size, bsp_gdt_size;
 
-
 // struct Global_Memory_Descriptor memory_management_struct = {{0}, 0};
 void test_slab();
 
@@ -71,12 +70,17 @@ void reload_idt()
 void system_initialize()
 {
 
+    uart_init(COM1, 115200);
+    video_init();
+
+    // scm_init();
     // 初始化printk
     printk_init(8, 16);
     //#ifdef DEBUG
-    uart_init(COM1, 115200);
     //#endif
     kinfo("Kernel Starting...");
+    while (1)
+        pause();
     // 重新加载gdt和idt
 
     ul tss_item_addr = (ul)phys_2_virt(0x7c00);
@@ -98,9 +102,12 @@ void system_initialize()
 
     //  初始化内存管理单元
     mm_init();
-
+    // 内存管理单元初始化完毕后，需要立即重新初始化显示驱动。
+    // 原因是，系统启动初期，framebuffer被映射到48M地址处，
+    // mm初始化完毕后，若不重新初始化显示驱动，将会导致错误的数据写入内存，从而造成其他模块崩溃
     // 对显示模块进行低级初始化，不启用double buffer
-    video_init(false);
+    video_reinitialize(false);
+
 
     // =========== 重新设置initial_tss[0]的ist
     uchar *ptr = (uchar *)kmalloc(STACK_SIZE, 0) + STACK_SIZE;
@@ -139,7 +146,6 @@ void system_initialize()
     smp_init();
     io_mfence();
 
-    
     cpu_init();
     ps2_keyboard_init();
     // ps2_mouse_init();
@@ -160,7 +166,7 @@ void system_initialize()
 
     process_init();
     // 对显示模块进行高级初始化，启用double buffer
-    video_init(true);
+    video_reinitialize(true);
     io_mfence();
 
     // fat32_init();
@@ -207,4 +213,3 @@ void ignore_int()
     while (1)
         ;
 }
-#pragma GCC pop_options

kernel/mm/mm.c

@@ -164,7 +164,6 @@ void mm_init()
 
     // ==== 遍历e820数组，完成成员变量初始化工作 ===
 
-    kdebug("ddd");
     for (int i = 0; i < memory_management_struct.len_e820; ++i)
     {
         io_mfence();
@@ -229,12 +228,10 @@ void mm_init()
     ZONE_NORMAL_INDEX = 0;
     ZONE_UNMAPPED_INDEX = 0;
 
-    
     // kdebug("ZONE_DMA_INDEX=%d\tZONE_NORMAL_INDEX=%d\tZONE_UNMAPPED_INDEX=%d", ZONE_DMA_INDEX, ZONE_NORMAL_INDEX, ZONE_UNMAPPED_INDEX);
     //  设置内存页管理结构的地址，预留了一段空间，防止内存越界。
     memory_management_struct.end_of_struct = (ul)((ul)memory_management_struct.zones_struct + memory_management_struct.zones_struct_len + sizeof(long) * 32) & (~(sizeof(long) - 1));
 
-    
     // 初始化内存管理单元结构所占的物理页的结构体
     ul mms_max_page = (virt_2_phys(memory_management_struct.end_of_struct) >> PAGE_2M_SHIFT); // 内存管理单元所占据的序号最大的物理页
     // kdebug("mms_max_page=%ld", mms_max_page);
@@ -256,10 +253,10 @@ void mm_init()
     kinfo("Memory management unit initialize complete!");
 
     flush_tlb();
+    // todo: 在这里增加代码，暂时停止视频输出，否则可能会导致图像数据写入slab的区域，从而造成异常
     // 初始化slab内存池
     slab_init();
     page_table_init();
-    // init_frame_buffer();
 }
 
 /**
@@ -640,9 +637,8 @@ int mm_map_proc_page_table(ul proc_page_table_addr, bool is_phys, ul virt_addr_s
                 {
                     if (unlikely(*pde_ptr != 0 && user))
                     {
-                        // kwarn("page already mapped!");
                         // 如果是用户态可访问的页，则释放当前新获取的物理页
-                        if (likely(((ul)phys_addr_start + length_mapped) < total_2M_pages)) // 校验是否为内存中的物理页
+                        if (likely((((ul)phys_addr_start + length_mapped) >> PAGE_2M_SHIFT) < total_2M_pages)) // 校验是否为内存中的物理页
                             free_pages(Phy_to_2M_Page((ul)phys_addr_start + length_mapped), 1);
                         length_mapped += PAGE_2M_SIZE;
                         continue;
@@ -974,8 +970,9 @@ bool mm_check_mapped(ul page_table_phys_addr, uint64_t virt_addr)
  */
 int8_t mm_is_2M_page(uint64_t paddr)
 {
-    if(likely((paddr >> PAGE_2M_SHIFT)<total_2M_pages))
+    if (likely((paddr >> PAGE_2M_SHIFT) < total_2M_pages))
         return 1;
-    else return 0;
+    else
+        return 0;
 }
 // #pragma GCC pop_options