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// Menu presented during final phase of "post".
//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include "biosvar.h" // GET_EBDA
#include "util.h" // mdelay
#include "bregs.h" // struct bregs
#include "boot.h" // IPL
static int
check_for_keystroke()
{
struct bregs br;
memset(&br, 0, sizeof(br));
br.ah = 1;
call16_int(0x16, &br);
return !(br.flags & F_ZF);
}
static int
get_keystroke()
{
struct bregs br;
memset(&br, 0, sizeof(br));
call16_int(0x16, &br);
return br.ah;
}
static void
usleep(u32 usec)
{
struct bregs br;
memset(&br, 0, sizeof(br));
br.ah = 0x86;
br.cx = usec >> 16;
br.dx = usec;
call16_int(0x15, &br);
}
static int
timed_check_for_keystroke(int msec)
{
while (msec > 0) {
if (check_for_keystroke())
return 1;
usleep(50*1000);
msec -= 50;
}
return 0;
}
void
interactive_bootmenu()
{
if (! CONFIG_BOOTMENU)
return;
while (check_for_keystroke())
get_keystroke();
printf("Press F12 for boot menu.\n\n");
if (!timed_check_for_keystroke(2500))
return;
int scan_code = get_keystroke();
if (scan_code != 0x86)
/* not F12 */
return;
while (check_for_keystroke())
get_keystroke();
printf("Select boot device:\n\n");
int count = IPL.count;
int i;
for (i = 0; i < count; i++) {
printf("%d. ", i+1);
printf_bootdev(i);
printf("\n");
}
for (;;) {
scan_code = get_keystroke();
if (scan_code == 0x01 || scan_code == 0x58)
/* ESC or F12 */
break;
if (scan_code <= count + 1) {
// Add user choice to the boot order.
u16 choice = scan_code - 1;
u32 bootorder = IPL.bootorder;
IPL.bootorder = (bootorder << 4) | choice;
break;
}
}
printf("\n");
}
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