1 files changed, 122 insertions, 0 deletions
diff --git a/grub-core/term/xen/console.c b/grub-core/term/xen/console.c
new file mode 100644
index 0000000..a1f15f7
--- /dev/null
+++ b/grub-core/term/xen/console.c
@@ -0,0 +1,122 @@
+/*
+ *  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");
+}