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/* 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();
}
}
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