29 lines
693 B
C
29 lines
693 B
C
#include <stdint.h>
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uint8_t io_in8(uint16_t port) {
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uint8_t r;
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asm volatile("inb %1, %0" : "=a"(r) : "dN"(port));
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return r;
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}
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void io_out8(uint16_t port, uint8_t value) {
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asm volatile("outb %1, %0" :: "dN"(port), "a"(value));
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}
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uint16_t io_in16(uint16_t port) {
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uint16_t r;
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asm volatile("in %%dx, %%ax" : "=a"(r) : "d"(port));
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return r;
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}
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void io_out16(uint16_t port, uint16_t value) {
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asm volatile("out %%ax, %%dx" :: "a"(value), "d"(port));
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}
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uint32_t io_in32(uint16_t port) {
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uint32_t r;
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asm volatile("inl %%dx, %%eax" : "=a"(r) : "d"(port));
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return r;
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}
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void io_out32(uint16_t port, uint32_t value) {
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asm volatile("outl %%eax, %%dx" :: "d"(port), "a"(value));
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}
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