31     uint16_t port;  in serial_init()  local
37 	    port = sci->iobase;  in serial_init()
43 	port = strtoul(argv[0], NULL, 0);  in serial_init()
44 	if (port <= 3) {  in serial_init()
45 	    uint16_t addr = ((uint16_t *)0x400)[port];  in serial_init()
50 	    printf("Serial port %u is at 0x%04x\n", port, addr);  in serial_init()
51 	    port = addr;  in serial_init()
55     sif->port = port;  in serial_init()
61     if (port == sci->iobase) {  in serial_init()
78     sif->old.lcr = inb(port + LCR);  in serial_init()
79     sif->old.mcr = inb(port + MCR);  in serial_init()
80     sif->old.iir = inb(port + IIR);  in serial_init()
83     outb(0x83, port + LCR);	/* Enable divisor access */  in serial_init()
84     sif->old.dll = inb(port + DLL);  in serial_init()
85     sif->old.dlm = inb(port + DLM);  in serial_init()
86     outb(divisor, port + DLL);  in serial_init()
87     outb(divisor >> 8, port + DLM);  in serial_init()
88     (void)inb(port + IER);	/* Synchronize */  in serial_init()
90     dll = inb(port + DLL);  in serial_init()
91     dlm = inb(port + DLM);  in serial_init()
92     lcr = inb(port + LCR);  in serial_init()
93     outb(0x03, port + LCR);	/* Enable data access, n81 */  in serial_init()
94     (void)inb(port + IER);	/* Synchronize */  in serial_init()
95     sif->old.ier = inb(port + IER);  in serial_init()
98     outb(0, port + IER);  in serial_init()
111     outb(0x01, port + FCR);	/* Enable FIFO */  in serial_init()
112     (void)inb(port + IER);	/* Synchronize */  in serial_init()
113     if (inb(port + IIR) < 0xc0)  in serial_init()
114 	outb(0x00, port + FCR);	/* Disable FIFOs if non-functional */  in serial_init()
115     (void)inb(port + IER);	/* Synchronize */  in serial_init()
122     uint16_t port = sif->port;  in serial_write()  local
128 	    lsr = inb(port + LSR);  in serial_write()
131 	outb(*p++, port + THR);  in serial_write()
137     uint16_t port = sif->port;  in serial_read()  local
143 	    lsr = inb(port + LSR);  in serial_read()
146 	*p++ = inb(port + RBR);  in serial_read()
152     uint16_t port = sif->port;  in serial_cleanup()  local
154     outb(0x83, port + LCR);  in serial_cleanup()
155     (void)inb(port + IER);  in serial_cleanup()
156     outb(sif->old.dll, port + DLL);  in serial_cleanup()
157     outb(sif->old.dlm, port + DLM);  in serial_cleanup()
158     (void)inb(port + IER);  in serial_cleanup()
159     outb(sif->old.lcr & 0x7f, port + LCR);  in serial_cleanup()
160     (void)inb(port + IER);  in serial_cleanup()
161     outb(sif->old.mcr, port + MCR);  in serial_cleanup()
162     outb(sif->old.ier, port + IER);  in serial_cleanup()
164 	outb(0x00, port + FCR);	/* Disable FIFOs */  in serial_cleanup()