From 7a6cf86e4dd3094ed5aa41bf76d93c28c89e85e7 Mon Sep 17 00:00:00 2001 From: Danny Holman Date: Wed, 20 Jan 2021 21:31:23 -0600 Subject: i386: add serial port support Add support for serial communication in the i386 architecture. Signed-off-by: Danny Holman --- arch/i386/pic.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 arch/i386/pic.h (limited to 'arch/i386/pic.h') diff --git a/arch/i386/pic.h b/arch/i386/pic.h new file mode 100644 index 0000000..da4a2ee --- /dev/null +++ b/arch/i386/pic.h @@ -0,0 +1,16 @@ +#ifndef PIC_H +#define PIC_H + +#include + +static inline void outb(uint16_t port, uint8_t value) { + asm volatile("outb %0, %1" : : "a"(value), "Nd"(port)); +} + +static inline uint8_t inb(uint16_t port) { + uint8_t ret; + asm volatile("inb %1, %0" : "=a"(ret) : "Nd"(port)); + return ret; +} + +#endif -- cgit v1.2.3