f90c075d50
renamed: kernel/include/libc.h -> include/libc.h renamed: kernel/include/paging.h -> include/paging.h renamed: kernel/include/printf.h -> include/printf.h renamed: kernel/include/serial.h -> include/serial.h renamed: kernel/include/video.h -> include/video.h new file: indigo_os renamed: kernel/libs/acpi.c -> kernel/acpi.c renamed: kernel/libs/drivers/serial.c -> kernel/drivers/serial.c renamed: kernel/libs/drivers/video.c -> kernel/drivers/video.c renamed: kernel/libs/libc.c -> kernel/libc.c renamed: kernel/libs/page.c -> kernel/page.c renamed: kernel/libs/printf.c -> kernel/printf.c renamed: kernel/libs/printf.h -> kernel/printf.h modified: makefile
40 lines
824 B
C
40 lines
824 B
C
#include <stdint.h>
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#include <serial.h>
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static inline void outb(uint16_t port, uint8_t value) {
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asm volatile(
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"outb %0, %1" :: "a"(value), "Nd"(port)
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);
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}
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static inline uint8_t inb(uint16_t port) {
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uint8_t ret;
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asm volatile(
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"inb %1, %0" : "=a"(ret) : "Nd"(port)
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);
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return(ret);
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}
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int init_serial(uint16_t port) {
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outb(port + 1, 0x00);
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outb(port + 3, 0x80);
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outb(port + 0, 0x06);
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outb(port + 1, 0x00);
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outb(port + 3, 0x03);
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outb(port + 2, 0xc7);
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outb(port + 4, 0x0b);
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outb(port + 4, 0x1e);
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outb(port + 0, 0xae); // test char
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if(inb(port + 0) != 0xae)
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return 1;
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outb(port + 4, 0x0f); // dissable interupts
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return 0;
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}
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void _putchar_serial(uint16_t port, char msg) {
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while(!(inb(port + 5) & 0x20)); //wait for transmit to be done
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outb(port, msg);
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}
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