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