summaryrefslogtreecommitdiffstats
path: root/grub-core/term/xen
diff options
context:
space:
mode:
Diffstat (limited to 'grub-core/term/xen')
-rw-r--r--grub-core/term/xen/console.c122
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");
+}