39 lines
788 B
C
39 lines
788 B
C
#ifndef io_header
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#define io_header
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#include <stdint.h>
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#include <printf.h>
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static inline void outb(uint16_t port, uint8_t value) {
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asm volatile("outb %1, %0" :: "a"(value), "Nd"(port));
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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("inb %0, %1" : "=a"(ret) : "Nd"(port));
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return(ret);
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}
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static inline void io_wait() {
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asm volatile("outb 0x80, %%al"::"a"(0));
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}
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static inline uint64_t read_tsc() {
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uint64_t time;
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asm volatile("xor rax, rax\n"
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"rdtsc\n"
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"shl rdx, 32\n"
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"or rax, rdx\n"
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"mov %0, rax\n"
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:"=r"(time):);
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return time;
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}
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void outb_wait(uint16_t port, uint8_t value);
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void read_msr(uint32_t addr, uint64_t *value);
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void write_msr(uint32_t addr, uint64_t value);
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void hlt();
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uint64_t get_rip();
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#endif
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