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/*
****************************************************************************
* (C) 2006 - Grzegorz Milos - Cambridge University
****************************************************************************
*
* File: console.h
* Author: Grzegorz Milos
* Changes:
*
* Date: Mar 2006
*
* Environment: Xen Minimal OS
* Description: Console interface.
*
* Handles console I/O. Defines printk.
*
****************************************************************************
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <mini-os/types.h>
#include <mini-os/wait.h>
#include <mini-os/mm.h>
#include <mini-os/hypervisor.h>
#include <mini-os/events.h>
#include <mini-os/os.h>
#include <mini-os/lib.h>
#include <mini-os/xenbus.h>
#include <xen/io/console.h>
/* Copies all print output to the Xen emergency console apart
of standard dom0 handled console */
#define USE_XEN_CONSOLE
/* If console not initialised the printk will be sent to xen serial line
NOTE: you need to enable verbose in xen/Rules.mk for it to work. */
static int console_initialised = 0;
#ifndef HAVE_LIBC
void xencons_rx(char *buf, unsigned len, struct pt_regs *regs)
{
if(len > 0)
{
/* Just repeat what's written */
buf[len] = '\0';
printk("%s", buf);
if(buf[len-1] == '\r')
printk("\nNo console input handler.\n");
}
}
void xencons_tx(void)
{
/* Do nothing, handled by _rx */
}
#endif
void console_print(struct consfront_dev *dev, char *data, int length)
{
char *curr_char, saved_char;
char copied_str[length+1];
char *copied_ptr;
int part_len;
int (*ring_send_fn)(struct consfront_dev *dev, const char *data, unsigned length);
if(!console_initialised)
ring_send_fn = xencons_ring_send_no_notify;
else
ring_send_fn = xencons_ring_send;
copied_ptr = copied_str;
memcpy(copied_ptr, data, length);
for(curr_char = copied_ptr; curr_char < copied_ptr+length-1; curr_char++)
{
if(*curr_char == '\n')
{
*curr_char = '\r';
saved_char = *(curr_char+1);
*(curr_char+1) = '\n';
part_len = curr_char - copied_ptr + 2;
ring_send_fn(dev, copied_ptr, part_len);
*(curr_char+1) = saved_char;
copied_ptr = curr_char+1;
length -= part_len - 1;
}
}
if (copied_ptr[length-1] == '\n') {
copied_ptr[length-1] = '\r';
copied_ptr[length] = '\n';
length++;
}
ring_send_fn(dev, copied_ptr, length);
}
void print(int direct, const char *fmt, va_list args)
{
static char buf[1024];
(void)vsnprintf(buf, sizeof(buf), fmt, args);
if(direct)
{
(void)HYPERVISOR_console_io(CONSOLEIO_write, strlen(buf), buf);
return;
} else {
#ifndef USE_XEN_CONSOLE
if(!console_initialised)
#endif
(void)HYPERVISOR_console_io(CONSOLEIO_write, strlen(buf), buf);
console_print(NULL, buf, strlen(buf));
}
}
void printk(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
print(0, fmt, args);
va_end(args);
}
void xprintk(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
print(1, fmt, args);
va_end(args);
}
void init_console(void)
{
printk("Initialising console ... ");
xencons_ring_init();
console_initialised = 1;
/* This is also required to notify the daemon */
printk("done.\n");
}
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