Bus-Independent Device Accesses — The Linux Kernel …
Linux provides an API which abstracts performing IO across all busses and devices, allowing device drivers to be written independently of bus type. The most widely supported form of IO is memory mapped IO. That is, a part of the CPU’s address space is interpreted not as accesses to memory, but as accesses to a device.
C++ writeq函数代码示例 - 纯净天空
本文整理汇总了C++中 writeq函数 的典型用法代码示例。 如果您正苦于以下问题：C++ writeq函数的具体用法？ C++ writeq怎么用？ C++ writeq使用的例子？那么, 这里精选的函数代码示例或许可以为您提供帮助。 在下文中一共展示了 writeq函数 的15个代码示例，这些例子默认根据受欢迎程度排序。 您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。 struct device_attribute *attr, const char *buf, size_t count) struct kp2000_device *pcard …
readb(), readw(), readl()，writeb(), writew(), writel() 宏函数
2014年3月4日 · writel和readl，这两个个 函数 实现在操作系统层，有内存保护的情况下，往一个寄存器或者内存地址写一个数据。 先说一下writel: 这段代码前几天问过了，是标示将两边的字符串连接起来的意思。 继续阅读代码，看看定义__IO_PREFIX之后紧接着包含了哪个头文件。 在哪个头文. 件里面寻找答案。 对于你的apsec，看看以下代码段（linux -2.6.28-rc4） 来写入数据的。 同样的readl读取数据也和writel类似，这里就不重复了。 文章浏览阅读1.8w次，点赞5次，收藏18 …
Linux memory读写约束readl、readl_relaxed、writel …
2023年7月1日 · 不管是 inner shareable 还是 outer shareable 普通内存，都有3种cache属性： Write-Through Cacheable. Write-Back Cacheable. Non-cacheable. 对设备内存类型属性的内存位置的访问可能会导致副作用，或者加载返回的值可能会根据执行的加载次数而变化。
EXEC CICS WRITEQ TS - IBM
Write data to a temporary storage queue. Conditions: INVREQ, IOERR, ISCINVREQ, ITEMERR, LENGERR, LOCKED, NOSPACE, NOTAUTH, QIDERR, SYSIDERR. This command is threadsafe when it is used with a queue in main storage or auxiliary storage, either in a local CICS® region, or function shipped to a remote CICS region over an IPIC connection.
WRITEQ TD - IBM
WRITEQ TD writes transient data to a predefined symbolic destination. To be able to write to an extrapartition queue, you must set the IOMode attribute that is in the Transient Data Definitions (TDD) entry to output.
WRITEQ TS - IBM
Writes data to a temporary storage queue. Conditions: INVREQ, IOERR, ISCINVREQ, ITEMERR, LENGERR, NOSPACE, NOTAUTH, QIDERR, SYSIDERR. Note: The LENGTH option is required with C or C++ programs when FROM is used. WRITEQ TS stores temporary data (records) in a temporary storage queue that is in either main or auxiliary storage.
CICS Queues - CICS Tutorial - IBMMainframer
writeq td: It is used to write Transient data queues and they are always written to a file. below is the syntax of WRITEQ TD command. EXEC CICS WRITEQ TD QUEUE('queue-name') FROM(queue-record) [LENGTH(queue-record-length)] END-EXEC.
汇编语言怎么表示多核？ - 知乎
这里调用的writeq就是一句汇编指令，可以说是题主想要的那句汇编，展开了就是一句MOV，向ipi_addr里写入ipi_data，就完成了从核的启动了。ipi_data可以理解为一个中断号，但中断的代码是提前准备好的（调用关系太长，就不详细介绍了）。
[PATCH v1] x86/io: Define readq()/writeq() to use 64-bit type - IU
2018年1月19日 · Convert readq() and writeq() on x86 to operate on deterministic 64-bit type. The most of architectures in the kernel already are using either unsigned long long, or u64 type for readq() / writeq(). This change propagates consistency in that sense. While this is not an issue per se, though if someone wants to address it, the anchor could be the ...