1 /*
2 * Serial port stubs for kernel decompress status messages
3 *
4 * Author: Anant Gole
5 * (C) Copyright (C) 2006, Texas Instruments, Inc
6 *
7 * This file is licensed under the terms of the GNU General Public License
8 * version 2. This program is licensed "as is" without any warranty of any
9 * kind, whether express or implied.
10 */
11
12 #include <linux/types.h>
13 #include <linux/serial_reg.h>
14 #include <mach/serial.h>
15
16 #include <asm/mach-types.h>
17
18 extern unsigned int __machine_arch_type;
19
20 static u32 *uart;
21
22 static u32 *get_uart_base(void)
23 {
24 /* Add logic here for new platforms, using __macine_arch_type */
25 return (u32 *)DAVINCI_UART0_BASE;
26 }
27
28 /* PORT_16C550A, in polled non-fifo mode */
29
30 static void putc(char c)
31 {
32 if (!uart)
33 uart = get_uart_base();
34
35 while (!(uart[UART_LSR] & UART_LSR_THRE))
36 barrier();
37 uart[UART_TX] = c;
38 }
39
40 static inline void flush(void)
41 {
42 if (!uart)
43 uart = get_uart_base();
44
45 while (!(uart[UART_LSR] & UART_LSR_THRE))
46 barrier();
47 }
48
49 #define arch_decomp_setup()
50 #define arch_decomp_wdog()
51
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