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-rw-r--r--qemu/roms/qemu-palcode/console.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/qemu/roms/qemu-palcode/console.c b/qemu/roms/qemu-palcode/console.c
new file mode 100644
index 000000000..382cf54d4
--- /dev/null
+++ b/qemu/roms/qemu-palcode/console.c
@@ -0,0 +1,145 @@
+/* The SRM console prompt.
+
+ Copyright (C) 2011 Richard Henderson
+
+ This file is part of QEMU PALcode.
+
+ This program 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 2 of the License or
+ (at your option) any later version.
+
+ This program 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 text
+ of the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; see the file COPYING. If not see
+ <http://www.gnu.org/licenses/>. */
+
+#include "protos.h"
+#include "console.h"
+#include "vgatables.h"
+
+
+static void
+output_crnl(void)
+{
+ crb_puts(0, "\r\n", 2);
+}
+
+static void
+output_bell(void)
+{
+ crb_puts(0, "\a", 1);
+}
+
+static void
+backspace_and_erase(void)
+{
+ crb_puts(0, "\b \b", 3);
+}
+
+static unsigned long
+getline(char *buf, unsigned long bufsize)
+{
+ unsigned long len = 0;
+ long c;
+
+ while (1)
+ {
+ c = crb_getc(0);
+ if (c < 0)
+ continue;
+ switch ((int)c)
+ {
+ case '\r':
+ case '\n':
+ output_crnl();
+ buf[len] = 0;
+ return len;
+
+ case '\b':
+ case 0x7f: /* Delete */
+ if (len > 0)
+ {
+ backspace_and_erase();
+ len--;
+ }
+ else
+ output_bell();
+ break;
+
+ default:
+ if (len + 1 < bufsize)
+ {
+ buf[len] = c;
+ crb_puts(0, buf+len, 1);
+ len++;
+ }
+ else
+ output_bell();
+ break;
+ }
+ }
+}
+
+static inline void set_console_alarm(void)
+{
+ /* Just set a new timeout for 10ms = 10M ns. */
+ set_alarm_rel(10 * 1000 * 1000);
+}
+
+void
+do_entInt(unsigned long type, unsigned long vector)
+{
+ switch (type)
+ {
+ case 0:
+ /* ??? SMP interrupt. We're going to need this for starting up
+ secondary cpus. */
+ break;
+ case 1:
+ /* Timer interrupt. */
+ set_console_alarm();
+ break;
+ case 2:
+ /* ??? Device interrupt. We're going to need this for virtio disk
+ operations at minimum. */
+ break;
+ }
+}
+
+void
+do_console(void)
+{
+ char line[256];
+ unsigned long len;
+
+ wrkgp();
+ wrent(entInt, 0);
+ set_console_alarm();
+ swpipl(0);
+
+ if (have_vga)
+ {
+ unsigned short *vga, attr;
+ vga = pci_mem_base + SEG_CTEXT *16;
+ attr = 0x2000;
+ vga[0] = 'H' + attr;
+ vga[1] = 'e' + attr;
+ vga[2] = 'l' + attr;
+ vga[3] = 'l' + attr;
+ vga[4] = 'o' + attr;
+ }
+
+ while (1)
+ {
+ crb_puts(0, ">>> ", 4);
+ len = getline(line, sizeof(line));
+ crb_puts(0, "got: ", 5);
+ crb_puts(0, line, len);
+ output_crnl();
+ }
+}