-// 16bit code to load disk image and start system boot.
+// Code to load disk image and start system boot.
//
// 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 "util.h" // irq_enable
-#include "biosvar.h" // struct bregs
+#include "biosvar.h" // GET_EBDA
#include "config.h" // CONFIG_*
-#include "cmos.h" // inb_cmos
#include "ata.h" // ata_detect
#include "disk.h" // cdrom_boot
-
-// We need a copy of this string, but we are not actually a PnP BIOS,
-// so make sure it is *not* aligned, so OSes will not see it if they
-// scan.
-char pnp_string[] VISIBLE16 __attribute__((aligned (2))) = " $PnP";
+#include "bregs.h" // struct bregs
//--------------------------------------------------------------------------
// print_boot_device
//--------------------------------------------------------------------------
static const char drivetypes[][10]={
- "", "Floppy","Hard Disk","CD-Rom", "Network"
+ "", "Floppy", "Hard Disk", "CD-Rom", "Network"
};
void
printf("%s", drivetypes[type]);
/* print product string if BEV */
- void *far_description = (void*)GET_EBDA(ipl.table[bootdev].description);
+ char *far_description = GET_EBDA(ipl.table[bootdev].description);
if (type == 4 && far_description != 0) {
char description[33];
/* first 32 bytes are significant */
- memcpy(MAKE_FARPTR(GET_SEG(SS), &description), far_description, 32);
+ memcpy_far(MAKE_FARPTR(GET_SEG(SS), description), far_description, 32);
/* terminate string */
description[32] = 0;
printf(" [%.s]", description);
static void
try_boot(u16 seq_nr)
{
- irq_enable();
+ if (! CONFIG_BOOT)
+ BX_PANIC("Boot support not compiled in.\n");
SET_EBDA(ipl.sequence, seq_nr);
- u16 bootdev = inb_cmos(CMOS_BIOS_BOOTFLAG2);
- bootdev |= ((inb_cmos(CMOS_BIOS_BOOTFLAG1) & 0xf0) << 4);
+ u32 bootdev = GET_EBDA(ipl.bootorder);
bootdev >>= 4 * seq_nr;
bootdev &= 0xf;
- /* Read user selected device */
- u16 bootfirst = GET_EBDA(ipl.bootfirst);
- if (bootfirst != 0xFFFF) {
- bootdev = bootfirst;
- /* Reset boot sequence */
- SET_EBDA(ipl.bootfirst, 0xFFFF);
- SET_EBDA(ipl.sequence, 0xFFFF);
- }
-
if (bootdev == 0)
BX_PANIC("No bootable device.\n");
- /* Translate from CMOS runes to an IPL table offset by subtracting 1 */
+ /* Translate bootdev to an IPL table offset by subtracting 1 */
bootdev -= 1;
if (bootdev >= GET_EBDA(ipl.count)) {
- BX_INFO("Invalid boot device (0x%x)\n", bootdev);
+ dprintf(1, "Invalid boot device (0x%x)\n", bootdev);
return;
}
u8 bootdrv = 0;
struct bregs cr;
switch(type) {
- case IPL_TYPE_FLOPPY: /* FDD */
- case IPL_TYPE_HARDDISK: /* HDD */
+ case IPL_TYPE_FLOPPY:
+ case IPL_TYPE_HARDDISK:
bootdrv = (type == IPL_TYPE_HARDDISK) ? 0x80 : 0x00;
bootseg = 0x07c0;
}
/* Always check the signature on a HDD boot sector; on FDD,
- * only do the check if the CMOS doesn't tell us to skip it */
- if ((type != IPL_TYPE_FLOPPY)
- || !((inb_cmos(CMOS_BIOS_BOOTFLAG1) & 0x01))) {
+ * only do the check if configured for it */
+ if (type != IPL_TYPE_FLOPPY || GET_EBDA(ipl.checkfloppysig)) {
if (GET_FARVAR(bootseg, *(u16*)0x1fe) != 0xaa55) {
print_boot_failure(type, 0);
return;
/* CD-ROM */
if (! CONFIG_CDROM_BOOT)
break;
- u16 status = cdrom_boot();
+ int status = cdrom_boot();
if (status) {
printf("CDROM boot failure code : %04x\n", status);
print_boot_failure(type, 1);
}
/* Debugging info */
- BX_INFO("Booting from %x:%x\n", bootseg, bootip);
+ dprintf(1, "Booting from %x:%x\n", bootseg, bootip);
memset(&cr, 0, sizeof(cr));
cr.ip = bootip;
}
// Boot Failure recovery: try the next device.
-void VISIBLE16
+void VISIBLE32
handle_18()
{
- debug_enter(NULL);
+ debug_serial_setup();
+ debug_enter(NULL, DEBUG_HDL_18);
u16 seq = GET_EBDA(ipl.sequence) + 1;
do_boot(seq);
}
// INT 19h Boot Load Service Entry Point
-void VISIBLE16
+void VISIBLE32
handle_19()
{
- debug_enter(NULL);
+ debug_serial_setup();
+ debug_enter(NULL, DEBUG_HDL_19);
do_boot(0);
}
+
+// Ughh - some older gcc compilers have a bug which causes VISIBLE32
+// functions to not be exported as global variables.
+asm(".global handle_18, handle_19");