WebDPDK-dev Archive on lore.kernel.org help / color / mirror / Atom feed From: Akhil Goyal To: Cc: , , , , , , , … The out* functions do port output, the in* functions do port input; the b-suffix functions are byte-width and the w- suffix functions word-width; the _p-suffix functions pause until the I/O completes. They are primarily designed for internal kernel use, but can be used from user space.

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WebNov 22, 2024 · outb (cmd, port); } } return ret; } // Read a data from EC 0x68 port int ReadECPort(BYTE * const data) { int ret; ret = wait_EC_OBF (); if (ret == EC_OK) { *data = inb ( 0x68 ); } return ret; } int main() { // enable port (0x68 to 0x6c) Read/Write permission for I/O operations ret = ioperm ( 0x68, 5, 1 ); if ( ret < 0 ) { WebMay 6, 2024 · The out* functions do port output, the in* functions do port input; the b-suffix functions are byte-width and the w-suffix functions word-width; the _p-suffix functions pause until the I/O completes. 它们主要被设计为内部内核使用，但也可以从用户空间使用。 You compile with -O or -O2 or similar. greek goat food truck

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WebUser-space device drivers. It is not always necessary to write a device driver for a device, especially in applications where no two applications will compete for the device. The most useful example of this is a memory-mapped device, but you can also do this with devices in I/O space (devices accessed with inb () and outb (), etc.). WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed From: "John Stoffel" To: Rene Herman Cc: Paul Rolland , David Newall , "H. Peter Anvin" , Krzysztof Halasa , Pavel Machek , … flowchart purchase order process