mini6410 看门狗源码分析
来源:互联网 发布:硬件防火墙设置端口 编辑:程序博客网 时间:2024/05/23 23:59
转自:http://blog.csdn.net/muge0913/article/details/7067072
mini6410 看门狗源码分析
- 看门狗代码放在linux/drivers/char/watchdog/s3c2410_wdt.c中分析如下:
- 仅供技术参考,转载请注明出处:http://write.blog.csdn.net/postedit/7067072
- /* linux/drivers/char/watchdog/s3c2410_wdt.c
- *
- * Copyright (c) 2004 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2410 Watchdog Timer Support
- *
- * Based on, softdog.c by Alan Cox,
- * (c) Copyright 1996 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
- #include <linux/module.h>
- #include <linux/moduleparam.h>
- #include <linux/types.h>
- #include <linux/timer.h>
- #include <linux/miscdevice.h>
- #include <linux/watchdog.h>
- #include <linux/fs.h>
- #include <linux/init.h>
- #include <linux/platform_device.h>
- #include <linux/interrupt.h>
- #include <linux/clk.h>
- #include <linux/uaccess.h>
- #include <linux/io.h>
- #include <linux/cpufreq.h>
- #include <linux/slab.h>
- #include <mach/map.h>
- #undef S3C_VA_WATCHDOG
- #define S3C_VA_WATCHDOG (0)
- #include <plat/regs-watchdog.h>
- #define PFX "s3c2410-wdt: "
- #define CONFIG_S3C2410_WATCHDOG_ATBOOT (0)
- #define CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME (15)
- /*
- *nowayout表示决不允许看门狗关闭,为1表示不允许关闭,为0表示允许关闭;
- *tmr_margin表示默认的看门狗喂狗时间为15s;
- *tmr_atboot表示系统启动时就使能看门狗,为1表示使能,为0表示关闭;
- *soft_noboot表示看门狗工作的方式,看门狗可以作为定时器使用也可作为复位硬件使用,
- *soft_noboot为1表示看门狗作为定时器使用,不发送复位信号;
- *debug表示是否使用调试模式来调试代码,该模式中,会打印调试信息。
- */
- static int nowayout = WATCHDOG_NOWAYOUT;
- static int tmr_margin = CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME;
- static int tmr_atboot = CONFIG_S3C2410_WATCHDOG_ATBOOT;
- static int soft_noboot;
- static int debug;
- module_param(tmr_margin, int, 0);
- module_param(tmr_atboot, int, 0);
- module_param(nowayout, int, 0);
- module_param(soft_noboot, int, 0);
- module_param(debug, int, 0);
- MODULE_PARM_DESC(tmr_margin, "Watchdog tmr_margin in seconds. (default="
- __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME) ")");
- MODULE_PARM_DESC(tmr_atboot,
- "Watchdog is started at boot time if set to 1, default="
- __MODULE_STRING(CONFIG_S3C2410_WATCHDOG_ATBOOT));
- MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default="
- __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
- MODULE_PARM_DESC(soft_noboot, "Watchdog action, set to 1 to ignore reboots, "
- "0 to reboot (default 0)");
- MODULE_PARM_DESC(debug, "Watchdog debug, set to >1 for debug (default 0)");
- static unsigned long open_lock;
- static struct device *wdt_dev; /* platform device attached to */
- static struct resource *wdt_mem;
- static struct resource *wdt_irq;
- static struct clk *wdt_clock;
- static void __iomem *wdt_base;
- static unsigned int wdt_count;
- static char expect_close;
- static DEFINE_SPINLOCK(wdt_lock);
- /* watchdog control routines */
- #define DBG(msg...) do { \
- if (debug) \
- printk(KERN_INFO msg); \
- } while (0)
- /* functions */
- static void s3c2410wdt_keepalive(void)
- {
- spin_lock(&wdt_lock);
- writel(wdt_count, wdt_base + S3C2410_WTCNT);
- spin_unlock(&wdt_lock);
- }
- static void __s3c2410wdt_stop(void)
- {
- unsigned long wtcon;
- wtcon = readl(wdt_base + S3C2410_WTCON);
- wtcon &= ~(S3C2410_WTCON_ENABLE | S3C2410_WTCON_RSTEN);
- writel(wtcon, wdt_base + S3C2410_WTCON);
- }
- static void s3c2410wdt_stop(void)
- {
- spin_lock(&wdt_lock);
- __s3c2410wdt_stop();
- spin_unlock(&wdt_lock);
- }
- static void s3c2410wdt_start(void)
- {
- unsigned long wtcon;
- spin_lock(&wdt_lock);
- /*首先停止看门狗*/
- __s3c2410wdt_stop();
- /*读看门狗的控制寄存器*/
- wtcon = readl(wdt_base + S3C2410_WTCON);
- /*使能看门狗,设置时钟分频值为128*/
- wtcon |= S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128;
- /*上边说过看门狗一个作为一个正常的16位内部定时器也可作为复位硬件*/
- if (soft_noboot) {//如果作为内部定时器
- wtcon |= S3C2410_WTCON_INTEN;//开中断使能
- wtcon &= ~S3C2410_WTCON_RSTEN;//关闭复位使能
- } else {//如果作为复位硬件
- wtcon &= ~S3C2410_WTCON_INTEN;//关闭中断使能
- wtcon |= S3C2410_WTCON_RSTEN;//开复位使能
- }
- DBG("%s: wdt_count=0x%08x, wtcon=%08lx\n",
- __func__, wdt_count, wtcon);
- /*这里为什么要设置WTCNT的值,不是WTDAT中的值自动载入WTCNT吗?看看datasheet就知道了,看门狗定时器最初
- *使能的时候,WTDAT寄存器的值不会自动载入时 间计数器,所以WTCNT寄存器必须在使能它之前设置一个初始值
- */
- writel(wdt_count, wdt_base + S3C2410_WTDAT);
- writel(wdt_count, wdt_base + S3C2410_WTCNT);
- writel(wtcon, wdt_base + S3C2410_WTCON);
- spin_unlock(&wdt_lock);
- }
- static inline int s3c2410wdt_is_running(void)
- {
- return readl(wdt_base + S3C2410_WTCON) & S3C2410_WTCON_ENABLE;
- }
- static int s3c2410wdt_set_heartbeat(int timeout)
- {
- /*首先获得看门狗的时钟*/
- unsigned long freq = clk_get_rate(wdt_clock);
- unsigned int count;
- unsigned int divisor = 1;
- unsigned long wtcon;
- if (timeout < 1)
- return -EINVAL;
- freq /= 128;
- /*秒数乘以每秒的时间滴答等于计数值*/
- count = timeout * freq;
- DBG("%s: count=%d, timeout=%d, freq=%lu\n",
- __func__, count, timeout, freq);
- /* if the count is bigger than the watchdog register,
- then work out what we need to do (and if) we can
- actually make this value
- */
- /*计数值不能大于WTCNT的最大范围,WTCNT是一个16位的计数器,最大值是0x10000*/
- if (count >= 0x10000) {
- for (divisor = 1; divisor <= 0x100; divisor++) {
- if ((count / divisor) < 0x10000)
- break;
- }
- /*未找到返回错误*/
- if ((count / divisor) >= 0x10000) {
- dev_err(wdt_dev, "timeout %d too big\n", timeout);
- return -EINVAL;
- }
- }
- /*看门狗的喂狗时间*/
- tmr_margin = timeout;
- DBG("%s: timeout=%d, divisor=%d, count=%d (%08x)\n",
- __func__, timeout, divisor, count, count/divisor);
- count /= divisor;
- wdt_count = count;
- /* update the pre-scaler */
- //读看门狗的控制寄存器
- wtcon = readl(wdt_base + S3C2410_WTCON);
- //看门狗控制器高8位清零,也就是预分频部分清零
- wtcon &= ~S3C2410_WTCON_PRESCALE_MASK;
- //填入预分频系数
- wtcon |= S3C2410_WTCON_PRESCALE(divisor-1);
- //填入计数值
- writel(count, wdt_base + S3C2410_WTDAT);
- //填入控制寄存器的值
- writel(wtcon, wdt_base + S3C2410_WTCON);
- return 0;
- }
- /*
- * /dev/watchdog handling
- */
- static int s3c2410wdt_open(struct inode *inode, struct file *file)
- {
- /*检查open_lock的第0位,如果open_lock的第0位为0,则表示test_and_set_bit的返回值为0,
- 表示wdt设备没有被其他进程打开,如果为1,表示被其他进程打开,返回EBUSY*/
- if (test_and_set_bit(0, &open_lock))
- return -EBUSY;
- /*如果决不允许关闭看门狗,增加引用计数*/
- if (nowayout)
- __module_get(THIS_MODULE);
- /*设为不允许关闭*/
- expect_close = 0;
- /* start the timer */
- /*开启看门狗*/
- s3c2410wdt_start();
- /*这些寄存器不需要像文件一样对位置进行寻址*/
- return nonseekable_open(inode, file);
- }
- static int s3c2410wdt_release(struct inode *inode, struct file *file)
- {
- /*
- * Shut off the timer.
- * Lock it in if it's a module and we set nowayout
- */
- if (expect_close == 42)//看门狗为允许关闭状态
- s3c2410wdt_stop();//关闭看门狗
- else {
- dev_err(wdt_dev, "Unexpected close, not stopping watchdog\n");
- s3c2410wdt_keepalive();//否则喂狗
- }
- expect_close = 0; //设为不允许关闭
- clear_bit(0, &open_lock);//将open_lock的第0位设为0,是原子操作
- return 0;
- }
- static ssize_t s3c2410wdt_write(struct file *file, const char __user *data,
- size_t len, loff_t *ppos)
- {
- /*
- * Refresh the timer.
- */
- if (len) {//有数据写入len不为0
- if (!nowayout) {//允许关闭
- size_t i;
- /* In case it was set long ago */
- expect_close = 0; //关闭允许关闭状态
- for (i = 0; i != len; i++) {
- char c;
- if (get_user(c, data + i))
- return -EFAULT;
- if (c == 'V')//如果向设备写入'V',就允许关闭设
- expect_close = 42;
- }
- }
- s3c2410wdt_keepalive();
- }
- return len;
- }
- #define OPTIONS (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE)
- static const struct watchdog_info s3c2410_wdt_ident = {
- .options = OPTIONS,
- .firmware_version = 0,
- .identity = "S3C2410 Watchdog",
- };
- static long s3c2410wdt_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
- {
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- int new_margin;
- switch (cmd) {
- case WDIOC_GETSUPPORT://获得看门狗设备的信息
- return copy_to_user(argp, &s3c2410_wdt_ident,
- sizeof(s3c2410_wdt_ident)) ? -EFAULT : 0;
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- return put_user(0, p);
- case WDIOC_KEEPALIVE://对看门狗进行喂狗
- s3c2410wdt_keepalive();
- return 0;
- case WDIOC_SETTIMEOUT://设置看门狗的超时时间
- if (get_user(new_margin, p))
- return -EFAULT;
- if (s3c2410wdt_set_heartbeat(new_margin))
- return -EINVAL;
- s3c2410wdt_keepalive();
- return put_user(tmr_margin, p);
- case WDIOC_GETTIMEOUT:
- return put_user(tmr_margin, p);
- default:
- return -ENOTTY;
- }
- }
- /* kernel interface */
- /*
- *看门狗驱动作为字符驱动的file_operations结构
- */
- static const struct file_operations s3c2410wdt_fops = {
- .owner = THIS_MODULE,
- .llseek = no_llseek,
- .write = s3c2410wdt_write,
- .unlocked_ioctl = s3c2410wdt_ioctl,
- .open = s3c2410wdt_open,
- .release = s3c2410wdt_release,
- };
- static struct miscdevice s3c2410wdt_miscdev = {
- .minor = WATCHDOG_MINOR,
- .name = "watchdog",
- .fops = &s3c2410wdt_fops,
- };
- /* interrupt handler code */
- /*
- *如果选择了看门狗作为内部定时器,则当计数值为0时调用中断处理函数,中断处理函数的主要功能就是喂狗
- */
- static irqreturn_t s3c2410wdt_irq(int irqno, void *param)
- {
- dev_info(wdt_dev, "watchdog timer expired (irq)\n");
- /*中断处理中调用喂狗*/
- s3c2410wdt_keepalive();
- return IRQ_HANDLED;
- }
- #ifdef CONFIG_CPU_FREQ
- static int s3c2410wdt_cpufreq_transition(struct notifier_block *nb,
- unsigned long val, void *data)
- {
- int ret;
- if (!s3c2410wdt_is_running())
- goto done;
- if (val == CPUFREQ_PRECHANGE) {
- /* To ensure that over the change we don't cause the
- * watchdog to trigger, we perform an keep-alive if
- * the watchdog is running.
- */
- s3c2410wdt_keepalive();
- } else if (val == CPUFREQ_POSTCHANGE) {
- s3c2410wdt_stop();
- ret = s3c2410wdt_set_heartbeat(tmr_margin);
- if (ret >= 0)
- s3c2410wdt_start();
- else
- goto err;
- }
- done:
- return 0;
- err:
- dev_err(wdt_dev, "cannot set new value for timeout %d\n", tmr_margin);
- return ret;
- }
- static struct notifier_block s3c2410wdt_cpufreq_transition_nb = {
- .notifier_call = s3c2410wdt_cpufreq_transition,
- };
- static inline int s3c2410wdt_cpufreq_register(void)
- {
- return cpufreq_register_notifier(&s3c2410wdt_cpufreq_transition_nb,
- CPUFREQ_TRANSITION_NOTIFIER);
- }
- static inline void s3c2410wdt_cpufreq_deregister(void)
- {
- cpufreq_unregister_notifier(&s3c2410wdt_cpufreq_transition_nb,
- CPUFREQ_TRANSITION_NOTIFIER);
- }
- #else
- static inline int s3c2410wdt_cpufreq_register(void)
- {
- return 0;
- }
- static inline void s3c2410wdt_cpufreq_deregister(void)
- {
- }
- #endif
- /* device interface */
- static int __devinit s3c2410wdt_probe(struct platform_device *pdev)
- {
- struct resource *res;
- struct device *dev;
- unsigned int wtcon;
- int started = 0;
- int ret;
- int size;
- DBG("%s: probe=%p\n", __func__, pdev);
- /*平台设备中的设备结构体device*/
- dev = &pdev->dev;
- wdt_dev = &pdev->dev;
- /* get the memory region for the watchdog timer */
- /*获得看门狗的内存资源*/
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- /*获取失败则推出*/
- if (res == NULL) {
- dev_err(dev, "no memory resource specified\n");
- return -ENOENT;
- }
- /*内存资源所占的字节数*/
- size = resource_size(res);
- /*申请一块IO内存,对应看门狗的3个寄存器*/
- wdt_mem = request_mem_region(res->start, size, pdev->name);
- if (wdt_mem == NULL) {
- dev_err(dev, "failed to get memory region\n");
- return -EBUSY;
- }
- /*获得虚拟地址*/
- wdt_base = ioremap(res->start, size);
- if (wdt_base == NULL) {
- dev_err(dev, "failed to ioremap() region\n");
- ret = -EINVAL;
- goto err_req;
- }
- DBG("probe: mapped wdt_base=%p\n", wdt_base);
- /*申请中断*/
- wdt_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (wdt_irq == NULL) {
- dev_err(dev, "no irq resource specified\n");
- ret = -ENOENT;
- goto err_map;
- }
- /*并注册中断处理函数*/
- ret = request_irq(wdt_irq->start, s3c2410wdt_irq, 0, pdev->name, pdev);
- if (ret != 0) {
- dev_err(dev, "failed to install irq (%d)\n", ret);
- goto err_map;
- }
- /*获得看门狗时钟*/
- wdt_clock = clk_get(&pdev->dev, "watchdog");
- if (IS_ERR(wdt_clock)) {
- dev_err(dev, "failed to find watchdog clock source\n");
- ret = PTR_ERR(wdt_clock);
- goto err_irq;
- }
- /*时钟使能*/
- clk_enable(wdt_clock);
- if (s3c2410wdt_cpufreq_register() < 0) {
- printk(KERN_ERR PFX "failed to register cpufreq\n");
- goto err_clk;
- }
- /* see if we can actually set the requested timer margin, and if
- * not, try the default value */
- /*设置看门狗复位时间,如果成功返回0*/
- if (s3c2410wdt_set_heartbeat(tmr_margin)) {
- /*如果不成功,看门狗的复位时间设置成默认值*/
- started = s3c2410wdt_set_heartbeat(
- CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
- if (started == 0)
- dev_info(dev,
- "tmr_margin value out of range, default %d used\n",
- CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME);
- else
- dev_info(dev, "default timer value is out of range, "
- "cannot start\n");
- }
- /*注册混杂设备*/
- ret = misc_register(&s3c2410wdt_miscdev);
- if (ret) {
- dev_err(dev, "cannot register miscdev on minor=%d (%d)\n",
- WATCHDOG_MINOR, ret);
- goto err_cpufreq;
- }
- /*如果开机的时候就启动看门狗*/
- if (tmr_atboot && started == 0) {
- dev_info(dev, "starting watchdog timer\n");
- s3c2410wdt_start();//启动看门狗
- } else if (!tmr_atboot) {
- /* if we're not enabling the watchdog, then ensure it is
- * disabled if it has been left running from the bootloader
- * or other source */
- s3c2410wdt_stop();//关闭看门狗
- }
- /* print out a statement of readiness */
- /*读出看门狗控制寄存器的值*/
- wtcon = readl(wdt_base + S3C2410_WTCON);
- /*打印看门狗是否使能,是否允许发出复位信号,是否允许发出中断信号*/
- dev_info(dev, "watchdog %sactive, reset %sabled, irq %sabled\n",
- (wtcon & S3C2410_WTCON_ENABLE) ? "" : "in",
- (wtcon & S3C2410_WTCON_RSTEN) ? "" : "dis",
- (wtcon & S3C2410_WTCON_INTEN) ? "" : "en");
- return 0;
- err_cpufreq:
- s3c2410wdt_cpufreq_deregister();
- err_clk:
- clk_disable(wdt_clock);
- clk_put(wdt_clock);
- err_irq:
- free_irq(wdt_irq->start, pdev);
- err_map:
- iounmap(wdt_base);
- err_req:
- release_resource(wdt_mem);
- kfree(wdt_mem);
- return ret;
- }
- static int __devexit s3c2410wdt_remove(struct platform_device *dev)
- {
- misc_deregister(&s3c2410wdt_miscdev);//注销混杂设备
- s3c2410wdt_cpufreq_deregister();
- clk_disable(wdt_clock);//关闭时钟
- clk_put(wdt_clock);//减少时钟引用计数
- wdt_clock = NULL;
- free_irq(wdt_irq->start, dev);//释放中断号
- wdt_irq = NULL;
- iounmap(wdt_base);//关闭内存映射
- release_resource(wdt_mem);//释放平台资源
- kfree(wdt_mem);//释放I/O内存
- wdt_mem = NULL;
- return 0;
- }
- static void s3c2410wdt_shutdown(struct platform_device *dev)
- {
- s3c2410wdt_stop();
- }
- #ifdef CONFIG_PM
- static unsigned long wtcon_save;
- static unsigned long wtdat_save;
- /*
- *平台驱动中的电源管理部分
- */
- static int s3c2410wdt_suspend(struct platform_device *dev, pm_message_t state)
- {
- /* Save watchdog state, and turn it off. */
- /*只要保存S3C2410_WTDAT就可以了,不需要保存S3C2410_WTCNT,
- *S3C2410_WTCNT的值会在系统还原的时候直接赋为S3C2410_WTDAT中的值
- */
- wtcon_save = readl(wdt_base + S3C2410_WTCON);
- wtdat_save = readl(wdt_base + S3C2410_WTDAT);
- /* Note that WTCNT doesn't need to be saved. */
- s3c2410wdt_stop();
- return 0;
- }
- static int s3c2410wdt_resume(struct platform_device *dev)
- {
- /* Restore watchdog state. */
- writel(wtdat_save, wdt_base + S3C2410_WTDAT);
- writel(wtdat_save, wdt_base + S3C2410_WTCNT); /* Reset count */
- writel(wtcon_save, wdt_base + S3C2410_WTCON);
- printk(KERN_INFO PFX "watchdog %sabled\n",
- (wtcon_save & S3C2410_WTCON_ENABLE) ? "en" : "dis");
- return 0;
- }
- #else
- #define s3c2410wdt_suspend NULL
- #define s3c2410wdt_resume NULL
- #endif /* CONFIG_PM */
- /*
- *S3C2410的看门狗同时具有多重身份:字符设备,混杂设备,平台设备。
- *下面是看门狗驱动作为平台驱动的描述:
- */
- static struct platform_driver s3c2410wdt_driver = {
- .probe = s3c2410wdt_probe,
- .remove = __devexit_p(s3c2410wdt_remove),
- .shutdown = s3c2410wdt_shutdown,
- .suspend = s3c2410wdt_suspend,
- .resume = s3c2410wdt_resume,
- .driver = {
- .owner = THIS_MODULE,
- .name = "s3c2410-wdt",
- },
- };
- static char banner[] __initdata =
- KERN_INFO "S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics\n";
- /*
- *看门狗驱动作为平台驱动的注册
- */
- static int __init watchdog_init(void)
- {
- printk(banner);
- return platform_driver_register(&s3c2410wdt_driver);
- }
- static void __exit watchdog_exit(void)
- {
- platform_driver_unregister(&s3c2410wdt_driver);
- }
- module_init(watchdog_init);
- module_exit(watchdog_exit);
- MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, "
- "Dimitry Andric <dimitry.andric@tomtom.com>");
- MODULE_DESCRIPTION("S3C2410 Watchdog Device Driver");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
- MODULE_ALIAS("platform:s3c2410-wdt");
- mini6410 看门狗源码分析
- mini6410实现 看门狗移植
- MINI6410 按键驱动 源码分析 原理图 上
- MINI6410 按键驱动 源码分析 原理图 中
- MINI6410 按键驱动 源码分析 原理图 下
- Linux驱动修炼之道-看门狗框架源码分析
- Linux驱动修炼之道-看门狗框架源码分析
- mini6410 uboot board.c 分析
- mini6410 uboot board.c 分析
- S3C2410看门狗驱动分析
- S3C2440看门狗电路分析
- android -- WatchDog看门狗分析
- S3C2440看门狗编程分析
- S3C2410看门狗驱动分析 .
- android -- WatchDog看门狗分析
- android -- WatchDog看门狗分析
- S3C2410看门狗驱动分析
- AML_看门狗驱动分析
- 基于google Zxing实现二维码、条形码扫描,仿微信二维码扫描效果
- java枚举详解实例
- Linux:定时器
- Objective-C——消息、Category和Protocol
- 记性不可靠,纸头最重要,Excel VBA(宏)入门实用--Like 使用
- mini6410 看门狗源码分析
- Ubuntu13.04 :asking all remaining processes to terminate
- python基础知识
- 《那年,一步一步学linux c》全系列(目录索引)
- 关于程序动态库链接和运行时搜索路径设置的个人理解
- shader语言 及 HLSL GLSL CG着色语言比较
- Rotate Image
- Struts2配置RESULT中TYPE的参数说明
- Jenkins知识地图