71188c92f9
- support of TSS-based task switching - add a mailbox template - suport of user level task - support of system calls git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@47 315a16e6-25f9-4109-90ae-ca3045a26c18
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
|
|
* Copyright 2010 Stefan Lankes, Chair for Operating Systems,
|
|
* RWTH Aachen University
|
|
*
|
|
* 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.
|
|
*
|
|
* This file is part of MetalSVM.
|
|
*/
|
|
|
|
#include <metalsvm/stdio.h>
|
|
#include <metalsvm/string.h>
|
|
#include <metalsvm/stdarg.h>
|
|
#include <asm/atomic.h>
|
|
#ifdef CONFIG_VGA
|
|
#include <asm/vga.h>
|
|
#endif
|
|
|
|
static atomic_uint32_t kmsg_counter = 0;
|
|
static unsigned char kmessages[KMSG_SIZE];
|
|
|
|
int koutput_init(void)
|
|
{
|
|
#ifdef CONFIG_VGA
|
|
vga_init();
|
|
#endif
|
|
memset(kmessages, 0, sizeof(unsigned char)*KMSG_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kputchar(int c)
|
|
{
|
|
int pos;
|
|
int ret = 1;
|
|
|
|
pos = atomic_uint32_inc(&kmsg_counter);
|
|
kmessages[pos % KMSG_SIZE] = c;
|
|
|
|
#ifdef CONFIG_VGA
|
|
ret = vga_putchar(c);
|
|
#endif
|
|
|
|
return ret;
|
|
}
|
|
|
|
int kputs(const char *str)
|
|
{
|
|
int pos;
|
|
int i;
|
|
|
|
for(i=0; str[i] != '\0'; i++) {
|
|
pos = atomic_uint32_inc(&kmsg_counter);
|
|
kmessages[pos % KMSG_SIZE] = str[i];
|
|
}
|
|
|
|
#ifdef CONFIG_VGA
|
|
i = vga_puts(str);
|
|
#endif
|
|
|
|
return i;
|
|
}
|