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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" // usleep
#include "bregs.h" // struct bregs
static u8
check_for_keystroke()
{
struct bregs br;
memset(&br, 0, sizeof(br));
br.ah = 1;
call16_int(0x16, &br);
return !(br.flags & F_ZF);
}
static u8
get_keystroke()
{
struct bregs br;
memset(&br, 0, sizeof(br));
call16_int(0x16, &br);
return br.ah;
}
static void
udelay_and_check_for_keystroke(u32 usec, int count)
{
int i;
for (i = 1; i <= count; i++) {
usleep(usec);
if (check_for_keystroke())
break;
}
}
void
interactive_bootmenu()
{
if (! CONFIG_BOOTMENU)
return;
while (check_for_keystroke())
get_keystroke();
printf("Press F12 for boot menu.\n\n");
udelay_and_check_for_keystroke(500000, 5);
if (! check_for_keystroke())
return;
u8 scan_code = get_keystroke();
if (scan_code != 0x58)
/* not F12 */
return;
while (check_for_keystroke())
get_keystroke();
printf("Select boot device:\n\n");
int count = GET_EBDA(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 = GET_EBDA(ipl.bootorder);
SET_EBDA(ipl.bootorder, (bootorder << 4) | choice);
break;
}
}
printf("\n");
}
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