mirror of
https://gitlab.com/qemu-project/qemu-palcode.git
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146 lines
2.7 KiB
C
146 lines
2.7 KiB
C
/* The SRM console prompt.
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Copyright (C) 2011 Richard Henderson
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This file is part of QEMU PALcode.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the text
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of the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not see
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<http://www.gnu.org/licenses/>. */
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#include "protos.h"
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#include "console.h"
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#include "vgatables.h"
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static void
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output_crnl(void)
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{
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crb_puts(0, "\r\n", 2);
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}
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static void
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output_bell(void)
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{
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crb_puts(0, "\a", 1);
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}
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static void
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backspace_and_erase(void)
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{
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crb_puts(0, "\b \b", 3);
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}
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static unsigned long
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getline(char *buf, unsigned long bufsize)
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{
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unsigned long len = 0;
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long c;
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while (1)
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{
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c = crb_getc(0);
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if (c < 0)
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continue;
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switch ((int)c)
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{
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case '\r':
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case '\n':
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output_crnl();
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buf[len] = 0;
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return len;
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case '\b':
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case 0x7f: /* Delete */
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if (len > 0)
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{
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backspace_and_erase();
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len--;
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}
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else
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output_bell();
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break;
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default:
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if (len + 1 < bufsize)
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{
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buf[len] = c;
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crb_puts(0, buf+len, 1);
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len++;
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}
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else
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output_bell();
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break;
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}
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}
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}
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static inline void set_console_alarm(void)
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{
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/* Just set a new timeout for 10ms = 10M ns. */
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set_alarm_rel(10 * 1000 * 1000);
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}
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void
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do_entInt(unsigned long type, unsigned long vector)
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{
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switch (type)
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{
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case 0:
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/* ??? SMP interrupt. We're going to need this for starting up
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secondary cpus. */
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break;
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case 1:
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/* Timer interrupt. */
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set_console_alarm();
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break;
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case 2:
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/* ??? Device interrupt. We're going to need this for virtio disk
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operations at minimum. */
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break;
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}
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}
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void
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do_console(void)
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{
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char line[256];
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unsigned long len;
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wrkgp();
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wrent(entInt, 0);
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set_console_alarm();
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swpipl(0);
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if (have_vga)
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{
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unsigned short *vga, attr;
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vga = pci_mem_base + SEG_CTEXT *16;
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attr = 0x2000;
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vga[0] = 'H' + attr;
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vga[1] = 'e' + attr;
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vga[2] = 'l' + attr;
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vga[3] = 'l' + attr;
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vga[4] = 'o' + attr;
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}
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while (1)
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{
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crb_puts(0, ">>> ", 4);
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len = getline(line, sizeof(line));
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crb_puts(0, "got: ", 5);
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crb_puts(0, line, len);
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output_crnl();
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}
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}
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