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| author | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
|---|---|---|
| committer | Jon Santmyer <jon@jonsantmyer.com> | 2024-05-22 13:00:41 -0400 |
| commit | ace65b453151845bc361f21f3e5b651c35f9f126 (patch) | |
| tree | 262ebd29b0ca1d8584f0b6f1efa7a00d9f4f3e43 /include/device/uart.h | |
| parent | f004c1ade8d617a82cea2fe249434cccb47a2358 (diff) | |
| download | jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.gz jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.tar.bz2 jove-kernel-ace65b453151845bc361f21f3e5b651c35f9f126.zip | |
Diffstat (limited to 'include/device/uart.h')
| -rw-r--r-- | include/device/uart.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/device/uart.h b/include/device/uart.h new file mode 100644 index 0000000..1724eb5 --- /dev/null +++ b/include/device/uart.h @@ -0,0 +1,19 @@ +#ifndef JOVE_KERNEL_ARCH_x86_64_UART_H +#define JOVE_KERNEL_ARCH_x86_64_UART_H 1 + +#include "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 |