1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/kernel/console.C $ */
/* */
/* OpenPOWER HostBoot Project */
/* */
/* COPYRIGHT International Business Machines Corp. 2010,2014 */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
#include <util/singleton.H>
#include <kernel/console.H>
#include <util/sprintf.H>
#include <stdarg.h>
char kernel_printk_buffer[Console::BUFFER_SIZE];
Console::Console() : iv_pos(0), iv_buffer(kernel_printk_buffer)
{
memset(iv_buffer, '\0', Console::BUFFER_SIZE);
}
int Console::putc(int c)
{
if ('\b' == c)
{
__sync_sub_and_fetch(&iv_pos, 1);
}
else if (BUFFER_SIZE > iv_pos)
{
iv_buffer[__sync_fetch_and_add(&iv_pos, 1)] = c;
}
return c;
}
void printk(const char* str, ...)
{
using Util::vasprintf;
va_list args;
va_start(args, str);
Console& console = Singleton<Console>::instance();
vasprintf(console, str, args);
va_end(args);
}
|
