1 // io/console/misc.cc -- Generic code relating to kernel debug consoles
3 // This software is copyright (c) 2006 Scott Wood <scott@buserror.net>.
5 // Permission is hereby granted, free of charge, to any person obtaining a copy of
6 // this software and associated documentation files (the "Software"), to deal with
7 // the Software without restriction, including without limitation the rights to
8 // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
9 // of the Software, and to permit persons to whom the Software is furnished to do
10 // so, subject to the following conditions:
12 // * Redistributions of source code must retain the above copyright notice,
13 // this list of conditions and the following disclaimers.
15 // * Redistributions in binary form must reproduce the above copyright notice,
16 // this list of conditions and the following disclaimers in the
17 // documentation and/or other materials provided with the distribution.
19 // * The names of the Software's authors and/or contributors
20 // may not be used to endorse or promote products derived from
21 // this Software without specific prior written permission.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
25 // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
26 // CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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31 #include <kern/console.h>
32 #include <kern/libc.h>
33 #include <util/spinlock.h>
37 void Console::write(char *data, size_t len)
40 write(Array<octet>((octet *)data, len), &len64);
43 // All consoles will set this to themselves; the last console
44 // to be initialized will be used. At some point, the console
45 // used will be configurable (including the ability to broadcast
46 // to multiple consoles).
48 Console *primary_console;
52 static const size_t printf_buffer_size = 4096;
53 static char printf_buffer[printf_buffer_size];
54 Lock::SpinLock printf_lock;
56 // Note: this will not retry with a larger buffer if overflow
57 // happens. If you really need that, you'll need to call snprintf
58 // and primary_console->write yourself.
60 void vga_write(uint8_t *buf, u64 len);
62 size_t printf(const char *str, ...)
64 Lock::AutoSpinLockRecIRQ autolock(printf_lock);
68 size_t ret = vsnprintf(printf_buffer, printf_buffer_size, str, args);
71 if (ret > printf_buffer_size)
72 ret = printf_buffer_size;
74 IO::Console::primary_console->write(printf_buffer, ret);