函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\early_printk.c Create Date:2022-07-27 09:41:41
Last Modify:2020-03-12 14:18:49 Copyright©Brick
首页 函数Tree
注解内核,赢得工具下载SCCTEnglish

函数名称：early_serial_putc

函数原型：static int early_serial_putc(unsigned char ch)

返回类型：int

参数：

类型参数名称
unsigned charch
115  timeout等于0xffff
117  当serial_in(yS0 , Line Status )按位与XMTRDY的值恒等于0且timeout先自减循环
118  cpu_relax()
119  serial_out(yS0 , Transmit register (WRITE) , ch)
120  返回:如果timeout则0否则负1
调用者
名称描述
early_serial_write