minix/kernel/arch/i386/io_outb.S
Arun Thomas 9a21d1a2fd Macros for symbols used in both ASM and C
-The macros take care of prepending the leading underscore when
 necessary.
2010-08-17 16:44:07 +00:00

13 lines
295 B
ArmAsm

/* outb() - Output one byte Author: Kees J. Bot */
/* 18 Mar 1996 */
/* void outb(U16_t port, U8_t value); */
#include <machine/asm.h>
ENTRY(outb)
push %ebp
movl %esp, %ebp
movl 8(%ebp), %edx /* port */
movl 8+4(%ebp), %eax /* value */
outb %dx /* output 1 byte */
pop %ebp
ret