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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 | |
| parent | f004c1ade8d617a82cea2fe249434cccb47a2358 (diff) | |
| download | jove-kernel-master.tar.gz jove-kernel-master.tar.bz2 jove-kernel-master.zip | |
Diffstat (limited to 'include/device')
| -rw-r--r-- | include/device/serial.h | 48 | ||||
| -rw-r--r-- | include/device/uart.h | 19 |
2 files changed, 67 insertions, 0 deletions
diff --git a/include/device/serial.h b/include/device/serial.h new file mode 100644 index 0000000..d59b00f --- /dev/null +++ b/include/device/serial.h @@ -0,0 +1,48 @@ +#ifndef _JOVE_DEVICE_SERIAL_H +#define _JOVE_DEVICE_SERIAL_H 1 + +#include <stdbool.h> +#include <stdint.h> +#include <stddef.h> +#include "klib/spinlock.h" + +#define SERIAL_UART_COM1 0x3F8 +#define SERIAL_UART_COM2 0x2F8 + +#define SERIAL_UART_COM_THR(COM) COM +#define SERIAL_UART_COM_RBR(COM) COM +#define SERIAL_UART_COM_DLAB_DLL(COM) COM +#define SERIAL_UART_COM_IER(COM) (COM + 1) +#define SERIAL_UART_COM_DLAB_DLH(COM) (COM + 1) +#define SERIAL_UART_COM_IIR(COM) (COM + 2) +#define SERIAL_UART_COM_FCR(COM) (COM + 2) +#define SERIAL_UART_COM_LCR(COM) (COM + 3) +#define SERIAL_UART_COM_MCR(COM) (COM + 4) +#define SERIAL_UART_COM_LSR(COM) (COM + 5) +#define SERIAL_UART_COM_MSR(COM) (COM + 6) +#define SERIAL_UART_COM_SR(COM) (COM + 7) + +typedef struct serial_device +{ + uint16_t com; + spinlock_t lock; +} serial_dev_t; + +extern serial_dev_t COM1; + +void serial_setup(void); +serial_dev_t serial_new(uint16_t com); + +void serial_set_int(serial_dev_t *dev, bool enable); +void serial_set_baud(serial_dev_t *dev, uint16_t baud); + +void serial_set_fcr(serial_dev_t *dev, uint16_t flg); +void serial_set_lcr(serial_dev_t *dev, uint16_t flg); +void serial_set_mcr(serial_dev_t *dev, uint16_t flg); +void serial_set_lsr(serial_dev_t *dev, uint16_t flg); +void serial_set_msr(serial_dev_t *dev, uint16_t flg); + +uint8_t serial_line_status(serial_dev_t *dev); +void serial_write(serial_dev_t *dev, const char *s, size_t len); + +#endif 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 |