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inb, inw, inl - read from an I/O port

#include <sys/ddi.h>
#include <sys/sunddi.h>

unsigned char inb(int port);

unsigned short inw(int port);

unsigned long inl(int port);

The functions described here are obsolete. For the inb(), inw(), and inl() functions, use, respectively, ddi_get8(9F), ddi_get16(9F), and ddi_get32(9F) instead. port addr count These routines read data of various sizes from the I/O port with the address specified by port.

The inb(), inw(), and inl() functions read 8 bits, 16 bits, and 32 bits of data respectively, returning the resulting values.

The inb(), inw(), and inl() functions return the value that was read from the I/O port. These functions may be called from user, interrupt, or kernel context. See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE

Architecture x86

Stability Level Obsolete

isa (5), attributes (7), ddi_get16 (9F), ddi_get32 (9F), ddi_get8 (9F), outb (9F)

Writing Device Drivers