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Update io.h

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adding the missing io
This commit is contained in:
Gregory Kenneth Bowne
2025-11-20 10:07:01 -08:00
committed by GitHub
parent 01f85f97ec
commit 940b2810cb
1 changed files with 20 additions and 0 deletions
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20
kernel/io.h
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@@ -13,4 +13,24 @@ static inline uint8_t inb(uint16_t port) {
return ret;
}
static inline void outw(uint16_t port, uint16_t val) {
__asm__("outw %0, %1" : : "a"(val), "Nd"(port));
}
static inline uint16_t inw(uint16_t port) {
uint16_t ret;
__asm__("inw %1, %0" : "=a"(ret) : "Nd"(port));
return ret;
}
static inline void outl(uint16_t port, uint32_t val) {
__asm__("outl %0, %1" : : "a"(val), "Nd"(port));
}
static inline uint32_t inl(uint16_t port) {
uint32_t ret;
__asm__("inl %1, %0" : "=a"(ret) : "Nd"(port));
return ret;
}
#endif