61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
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#ifndef _BOOT_DRIVERS_PORT_H
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#define _BOOT_DRIVERS_PORT_H
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#include <libboot/types.h>
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static inline uint8_t port_read8(uint16_t port)
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{
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uint8_t result_data;
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asm volatile("inb %%dx, %%al"
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: "=a"(result_data)
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: "d"(port));
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return result_data;
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}
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static inline void port_write8(uint16_t port, uint8_t data)
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{
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asm volatile("outb %%al, %%dx"
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:
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: "a"(data), "d"(port));
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}
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static inline uint16_t port_read16(uint16_t port)
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{
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uint16_t result_data;
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asm volatile("inw %%dx, %%ax"
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: "=a"(result_data)
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: "d"(port));
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return result_data;
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}
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static inline void port_write16(uint16_t port, uint16_t data)
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{
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asm volatile("outw %%ax, %%dx"
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:
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: "a"(data), "d"(port));
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}
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static inline uint32_t port_read32(uint16_t port)
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{
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uint32_t result_data;
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asm volatile("inl %%dx, %%eax"
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: "=a"(result_data)
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: "d"(port));
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return result_data;
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}
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static inline void port_write32(uint16_t port, uint32_t data)
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{
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asm volatile("outl %%eax, %%dx"
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:
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: "a"(data), "d"(port));
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}
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static inline void port_wait_io()
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{
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asm volatile("out %%al, $0x80"
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:
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: "a"(0));
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}
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#endif // _BOOT_DRIVERS_PORT_H
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