1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * arch/arm/mach-sa1100/include/mach/uncompress.h
4  *
5  * (C) 1999 Nicolas Pitre <nico@fluxnic.net>
6  *
7  * Reorganised to be machine independent.
8  */
9 
10 #include "hardware.h"
11 
12 #define IOMEM(x)	(x)
13 
14 /*
15  * The following code assumes the serial port has already been
16  * initialized by the bootloader.  We search for the first enabled
17  * port in the most probable order.  If you didn't setup a port in
18  * your bootloader then nothing will appear (which might be desired).
19  */
20 
21 #define UART(x)		(*(volatile unsigned long *)(serial_port + (x)))
22 
putc(int c)23 static inline void putc(int c)
24 {
25 	unsigned long serial_port;
26 
27 	do {
28 		serial_port = _Ser3UTCR0;
29 		if (UART(UTCR3) & UTCR3_TXE) break;
30 		serial_port = _Ser1UTCR0;
31 		if (UART(UTCR3) & UTCR3_TXE) break;
32 		serial_port = _Ser2UTCR0;
33 		if (UART(UTCR3) & UTCR3_TXE) break;
34 		return;
35 	} while (0);
36 
37 	/* wait for space in the UART's transmitter */
38 	while (!(UART(UTSR1) & UTSR1_TNF))
39 		barrier();
40 
41 	/* send the character out. */
42 	UART(UTDR) = c;
43 }
44 
flush(void)45 static inline void flush(void)
46 {
47 }
48 
49 /*
50  * Nothing to do for these
51  */
52 #define arch_decomp_setup()
53