Bananymous
/
banan-os
1
1
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Kernel: Add IO functions inl, outl, and ins{b,w,l} to read into buffer

This commit is contained in:
Bananymous 2023-02-24 12:39:38 +02:00
parent 80f9428337
commit 34f9912a1d
1 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
kernel/include/kernel/IO.h
View File

@ -1,6 +1,7 @@
#pragma once
#include <stdint.h>
#include <stddef.h>
namespace IO
{
@ -29,6 +30,33 @@ namespace IO
return ret;
}
static inline void outl(uint16_t port, uint32_t val)
{
asm volatile("outl %0, %1" : : "a"(val), "Nd"(port));
}
static inline uint32_t inl(uint16_t port)
{
uint32_t ret;
asm volatile("inl %1, %0" : "=a"(ret) : "Nd"(port));
return ret;
}
static inline void insb(uint16_t port, uint8_t* buffer, size_t count)
{
asm volatile("rep insb" : "+D"(buffer), "+c"(count), "=m"(*buffer) : "Nd"(port) : "memory");
}
static inline void insw(uint16_t port, uint16_t* buffer, size_t count)
{
asm volatile("rep insw" : "+D"(buffer), "+c"(count), "=m"(*buffer) : "Nd"(port) : "memory");
}
static inline void insl(uint16_t port, uint32_t* buffer, size_t count)
{
asm volatile("rep insl" : "+D"(buffer), "+c"(count), "=m"(*buffer) : "Nd"(port) : "memory");
}
static inline void io_wait()
{
outb(0x80, 0);