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
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
45 static inline void flush(void)
46 {
47 }
48
49 /*
50 * Nothing to do for these
51 */
52 #define arch_decomp_setup()
53
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.