2 * Copyright (C) 2004-2007 ARM Limited.
3 * Copyright (C) 2008 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version 2
7 * as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 * As a special exception, if other files instantiate templates or use macros
19 * or inline functions from this file, or you compile this file and link it
20 * with other works to produce a work based on this file, this file does not
21 * by itself cause the resulting work to be covered by the GNU General Public
22 * License. However the source code for this file must still be made available
23 * in accordance with section (3) of the GNU General Public License.
25 * This exception does not invalidate any other reasons why a work based on
26 * this file might be covered by the GNU General Public License.
31 #if defined(CONFIG_CPU_V6)
35 #define DCC_RBIT (1 << 30)
36 #define DCC_WBIT (1 << 29)
38 #define write_dcc(x) \
39 __asm__ volatile ("mcr p14, 0, %0, c0, c5, 0\n" : : "r" (x))
42 __asm__ volatile ("mrc p14, 0, %0, c0, c5, 0\n" : "=r" (x))
44 #define status_dcc(x) \
45 __asm__ volatile ("mrc p14, 0, %0, c0, c1, 0\n" : "=r" (x))
47 #elif defined(CONFIG_CPU_XSCALE)
51 #define DCC_RBIT (1 << 31)
52 #define DCC_WBIT (1 << 28)
54 #define write_dcc(x) \
55 __asm__ volatile ("mcr p14, 0, %0, c8, c0, 0\n" : : "r" (x))
58 __asm__ volatile ("mrc p14, 0, %0, c9, c0, 0\n" : "=r" (x))
60 #define status_dcc(x) \
61 __asm__ volatile ("mrc p14, 0, %0, c14, c0, 0\n" : "=r" (x))
64 #define DCC_RBIT (1 << 0)
65 #define DCC_WBIT (1 << 1)
67 #define write_dcc(x) \
68 __asm__ volatile ("mcr p14, 0, %0, c1, c0, 0\n" : : "r" (x))
71 __asm__ volatile ("mrc p14, 0, %0, c1, c0, 0\n" : "=r" (x))
73 #define status_dcc(x) \
74 __asm__ volatile ("mrc p14, 0, %0, c0, c0, 0\n" : "=r" (x))
78 #define can_read_dcc(x) do { \
83 #define can_write_dcc(x) do { \
89 #define TIMEOUT_COUNT 0x4000000
91 int arm_dcc_init(void)
96 int arm_dcc_getc(void)
99 register unsigned int reg;
109 void arm_dcc_putc(char ch)
111 register unsigned int reg;
112 unsigned int timeout_count = TIMEOUT_COUNT;
114 while (--timeout_count) {
119 if (timeout_count == 0)
125 void arm_dcc_puts(const char *s)
131 int arm_dcc_tstc(void)
133 register unsigned int reg;
140 __weak struct serial_device *default_serial_console(void)