From bd7d4366b6643b5c6cd04f40dd32f5d9c9575fd6 Mon Sep 17 00:00:00 2001 From: Aleksa Vuckovic Date: Fri, 5 Aug 2022 14:33:51 +0200 Subject: organised files; switched to recursive make --- kernel/src/cpu/io.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 kernel/src/cpu/io.c (limited to 'kernel/src/cpu/io.c') diff --git a/kernel/src/cpu/io.c b/kernel/src/cpu/io.c new file mode 100644 index 0000000..6bf67d0 --- /dev/null +++ b/kernel/src/cpu/io.c @@ -0,0 +1,13 @@ +#include + +uint8_t inb(uint32_t port) +{ + uint8_t ret; + __asm__ volatile ("inb %%dx, %%al" : "=a"(ret) : "d"(port)); + return ret; +} + +void outb(uint32_t port, uint8_t value) +{ + __asm__ volatile ("outb %%al, %%dx" : : "d"(port), "a"(value)); +} -- cgit v1.2.3