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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2011 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/term.h>
#include <grub/types.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/time.h>
#include <grub/terminfo.h>
#include <grub/xen.h>
static int
readkey (struct grub_term_input *term __attribute__ ((unused)))
{
grub_size_t prod, cons;
int r;
mb ();
prod = grub_xen_xcons->in_prod;
cons = grub_xen_xcons->in_cons;
if (prod <= cons)
return -1;
r = grub_xen_xcons->in[cons];
cons++;
mb ();
grub_xen_xcons->in_cons = cons;
return r;
}
static int signal_sent = 1;
static void
refresh (struct grub_term_output *term __attribute__ ((unused)))
{
struct evtchn_send send;
send.port = grub_xen_start_page_addr->console.domU.evtchn;
grub_xen_event_channel_op (EVTCHNOP_send, &send);
signal_sent = 1;
while (grub_xen_xcons->out_prod != grub_xen_xcons->out_cons)
{
grub_xen_sched_op (SCHEDOP_yield, 0);
}
}
static void
put (struct grub_term_output *term __attribute__ ((unused)), const int c)
{
grub_size_t prod, cons;
while (1)
{
mb ();
prod = grub_xen_xcons->out_prod;
cons = grub_xen_xcons->out_cons;
if (prod < cons + sizeof (grub_xen_xcons->out))
break;
if (!signal_sent)
refresh (term);
grub_xen_sched_op (SCHEDOP_yield, 0);
}
grub_xen_xcons->out[prod++ & (sizeof (grub_xen_xcons->out) - 1)] = c;
mb ();
grub_xen_xcons->out_prod = prod;
signal_sent = 0;
}
struct grub_terminfo_input_state grub_console_terminfo_input = {
.readkey = readkey
};
struct grub_terminfo_output_state grub_console_terminfo_output = {
.put = put,
.size = {80, 24}
};
static struct grub_term_input grub_console_term_input = {
.name = "console",
.init = 0,
.getkey = grub_terminfo_getkey,
.data = &grub_console_terminfo_input
};
static struct grub_term_output grub_console_term_output = {
.name = "console",
.init = 0,
.putchar = grub_terminfo_putchar,
.getxy = grub_terminfo_getxy,
.getwh = grub_terminfo_getwh,
.gotoxy = grub_terminfo_gotoxy,
.cls = grub_terminfo_cls,
.refresh = refresh,
.setcolorstate = grub_terminfo_setcolorstate,
.setcursor = grub_terminfo_setcursor,
.flags = GRUB_TERM_CODE_TYPE_ASCII,
.data = &grub_console_terminfo_output,
};
void
grub_console_init (void)
{
grub_term_register_input ("console", &grub_console_term_input);
grub_term_register_output ("console", &grub_console_term_output);
grub_terminfo_init ();
grub_terminfo_output_register (&grub_console_term_output, "vt100-color");
}
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