| /* |
| * 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"); |
| } |