diff options
Diffstat (limited to 'arch/x86_64/uart.h')
-rw-r--r-- | arch/x86_64/uart.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/x86_64/uart.h b/arch/x86_64/uart.h new file mode 100644 index 0000000..8386eb7 --- /dev/null +++ b/arch/x86_64/uart.h @@ -0,0 +1,19 @@ +#ifndef JOVE_KERNEL_ARCH_x86_64_UART_H +#define JOVE_KERNEL_ARCH_x86_64_UART_H 1 + +#include "lib/jove.h" +#include <stdint.h> + +ALWAYS_INLINE uint8_t pinb(uint16_t port) +{ + uint8_t v; + __asm__ volatile("inb %1, %0": "=a"(v): "Nd"(port)); + return v; +} + +ALWAYS_INLINE void poutb(uint16_t port, uint8_t b) +{ + __asm__ volatile("outb %0, %1":: "a"(b), "Nd"(port)); +} + +#endif |