1 /*
2 * arch/arm/mach-vexpress/include/mach/uncompress.h
3 *
4 * Copyright (C) 2003 ARM Limited
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20 #define AMBA_UART_DR(base) (*(volatile unsigned char *)((base) + 0x00))
21 #define AMBA_UART_LCRH(base) (*(volatile unsigned char *)((base) + 0x2c))
22 #define AMBA_UART_CR(base) (*(volatile unsigned char *)((base) + 0x30))
23 #define AMBA_UART_FR(base) (*(volatile unsigned char *)((base) + 0x18))
24
25 #define UART_BASE 0x10009000
26 #define UART_BASE_RS1 0x1c090000
27
get_uart_base(void)28 static unsigned long get_uart_base(void)
29 {
30 unsigned long mpcore_periph;
31
32 /*
33 * Make an educated guess regarding the memory map:
34 * - the original A9 core tile, which has MPCore peripherals
35 * located at 0x1e000000, should use UART at 0x10009000
36 * - all other (RS1 complaint) tiles use UART mapped
37 * at 0x1c090000
38 */
39 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (mpcore_periph));
40
41 if (mpcore_periph == 0x1e000000)
42 return UART_BASE;
43 else
44 return UART_BASE_RS1;
45 }
46
47 /*
48 * This does not append a newline
49 */
putc(int c)50 static inline void putc(int c)
51 {
52 unsigned long base = get_uart_base();
53
54 while (AMBA_UART_FR(base) & (1 << 5))
55 barrier();
56
57 AMBA_UART_DR(base) = c;
58 }
59
flush(void)60 static inline void flush(void)
61 {
62 unsigned long base = get_uart_base();
63
64 while (AMBA_UART_FR(base) & (1 << 3))
65 barrier();
66 }
67
68 /*
69 * nothing to do
70 */
71 #define arch_decomp_setup()
72 #define arch_decomp_wdog()
73