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 condition:
12 // The above copyright notice and this permission notice shall be
13 // included in all copies or substantial portions of the Software.
15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 // CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS WITH THE
23 #include <kern/console.h>
24 #include <kern/libc.h>
25 #include <util/spinlock.h>
29 void Console::write(char *data, size_t len)
32 write(Array<octet>((octet *)data, len), &len64);
35 // All consoles will set this to themselves; the last console
36 // to be initialized will be used. At some point, the console
37 // used will be configurable (including the ability to broadcast
38 // to multiple consoles).
40 Console *primary_console;
44 static const size_t printf_buffer_size = 4096;
45 static char printf_buffer[printf_buffer_size];
46 Lock::SpinLock printf_lock;
48 // Note: this will not retry with a larger buffer if overflow
49 // happens. If you really need that, you'll need to call snprintf
50 // and primary_console->write yourself.
52 void vga_write(uint8_t *buf, u64 len);
54 size_t printf(const char *str, ...)
56 Lock::AutoSpinLockRecIRQ autolock(printf_lock);
60 size_t ret = vsnprintf(printf_buffer, printf_buffer_size, str, args);
63 if (ret > printf_buffer_size)
64 ret = printf_buffer_size;
66 IO::Console::primary_console->write(printf_buffer, ret);