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authorRajithaY <rajithax.yerrumsetty@intel.com>2017-04-25 03:31:15 -0700
committerRajitha Yerrumchetty <rajithax.yerrumsetty@intel.com>2017-05-22 06:48:08 +0000
commitbb756eebdac6fd24e8919e2c43f7d2c8c4091f59 (patch)
treeca11e03542edf2d8f631efeca5e1626d211107e3 /qemu/roms/seabios/src/boot.c
parenta14b48d18a9ed03ec191cf16b162206998a895ce (diff)
Adding qemu as a submodule of KVMFORNFV
This Patch includes the changes to add qemu as a submodule to kvmfornfv repo and make use of the updated latest qemu for the execution of all testcase Change-Id: I1280af507a857675c7f81d30c95255635667bdd7 Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>
Diffstat (limited to 'qemu/roms/seabios/src/boot.c')
-rw-r--r--qemu/roms/seabios/src/boot.c768
1 files changed, 0 insertions, 768 deletions
diff --git a/qemu/roms/seabios/src/boot.c b/qemu/roms/seabios/src/boot.c
deleted file mode 100644
index e0f73a385..000000000
--- a/qemu/roms/seabios/src/boot.c
+++ /dev/null
@@ -1,768 +0,0 @@
-// Code to load disk image and start system boot.
-//
-// Copyright (C) 2008-2013 Kevin O'Connor <kevin@koconnor.net>
-// Copyright (C) 2002 MandrakeSoft S.A.
-//
-// This file may be distributed under the terms of the GNU LGPLv3 license.
-
-#include "block.h" // struct drive_s
-#include "bregs.h" // struct bregs
-#include "config.h" // CONFIG_*
-#include "fw/paravirt.h" // qemu_cfg_show_boot_menu
-#include "hw/pci.h" // pci_bdf_to_*
-#include "hw/rtc.h" // rtc_read
-#include "hw/usb.h" // struct usbdevice_s
-#include "list.h" // hlist_node
-#include "malloc.h" // free
-#include "output.h" // dprintf
-#include "romfile.h" // romfile_loadint
-#include "std/disk.h" // struct mbr_s
-#include "string.h" // memset
-#include "util.h" // irqtimer_calc
-#include "tcgbios.h" // tpm_*
-
-
-/****************************************************************
- * Boot priority ordering
- ****************************************************************/
-
-static char **Bootorder VARVERIFY32INIT;
-static int BootorderCount;
-
-static void
-loadBootOrder(void)
-{
- if (!CONFIG_BOOTORDER)
- return;
-
- char *f = romfile_loadfile("bootorder", NULL);
- if (!f)
- return;
-
- int i = 0;
- BootorderCount = 1;
- while (f[i]) {
- if (f[i] == '\n')
- BootorderCount++;
- i++;
- }
- Bootorder = malloc_tmphigh(BootorderCount*sizeof(char*));
- if (!Bootorder) {
- warn_noalloc();
- free(f);
- BootorderCount = 0;
- return;
- }
-
- dprintf(1, "boot order:\n");
- i = 0;
- do {
- Bootorder[i] = f;
- f = strchr(f, '\n');
- if (f)
- *(f++) = '\0';
- Bootorder[i] = nullTrailingSpace(Bootorder[i]);
- dprintf(1, "%d: %s\n", i+1, Bootorder[i]);
- i++;
- } while (f);
-}
-
-// See if 'str' starts with 'glob' - if glob contains an '*' character
-// it will match any number of characters in str that aren't a '/' or
-// the next glob character.
-static char *
-glob_prefix(const char *glob, const char *str)
-{
- for (;;) {
- if (!*glob && (!*str || *str == '/'))
- return (char*)str;
- if (*glob == '*') {
- if (!*str || *str == '/' || *str == glob[1])
- glob++;
- else
- str++;
- continue;
- }
- if (*glob != *str)
- return NULL;
- glob++;
- str++;
- }
-}
-
-// Search the bootorder list for the given glob pattern.
-static int
-find_prio(const char *glob)
-{
- dprintf(1, "Searching bootorder for: %s\n", glob);
- int i;
- for (i = 0; i < BootorderCount; i++)
- if (glob_prefix(glob, Bootorder[i]))
- return i+1;
- return -1;
-}
-
-#define FW_PCI_DOMAIN "/pci@i0cf8"
-
-static char *
-build_pci_path(char *buf, int max, const char *devname, struct pci_device *pci)
-{
- // Build the string path of a bdf - for example: /pci@i0cf8/isa@1,2
- char *p = buf;
- if (pci->parent) {
- p = build_pci_path(p, max, "pci-bridge", pci->parent);
- } else {
- p += snprintf(p, buf+max-p, "%s", FW_PCI_DOMAIN);
- if (pci->rootbus)
- p += snprintf(p, buf+max-p, ",%x", pci->rootbus);
- }
-
- int dev = pci_bdf_to_dev(pci->bdf), fn = pci_bdf_to_fn(pci->bdf);
- p += snprintf(p, buf+max-p, "/%s@%x", devname, dev);
- if (fn)
- p += snprintf(p, buf+max-p, ",%x", fn);
- return p;
-}
-
-int bootprio_find_pci_device(struct pci_device *pci)
-{
- if (CONFIG_CSM)
- return csm_bootprio_pci(pci);
- if (!CONFIG_BOOTORDER)
- return -1;
- // Find pci device - for example: /pci@i0cf8/ethernet@5
- char desc[256];
- build_pci_path(desc, sizeof(desc), "*", pci);
- return find_prio(desc);
-}
-
-int bootprio_find_scsi_device(struct pci_device *pci, int target, int lun)
-{
- if (!CONFIG_BOOTORDER)
- return -1;
- if (!pci)
- // support only pci machine for now
- return -1;
- // Find scsi drive - for example: /pci@i0cf8/scsi@5/channel@0/disk@1,0
- char desc[256], *p;
- p = build_pci_path(desc, sizeof(desc), "*", pci);
- snprintf(p, desc+sizeof(desc)-p, "/*@0/*@%x,%x", target, lun);
- return find_prio(desc);
-}
-
-int bootprio_find_ata_device(struct pci_device *pci, int chanid, int slave)
-{
- if (CONFIG_CSM)
- return csm_bootprio_ata(pci, chanid, slave);
- if (!CONFIG_BOOTORDER)
- return -1;
- if (!pci)
- // support only pci machine for now
- return -1;
- // Find ata drive - for example: /pci@i0cf8/ide@1,1/drive@1/disk@0
- char desc[256], *p;
- p = build_pci_path(desc, sizeof(desc), "*", pci);
- snprintf(p, desc+sizeof(desc)-p, "/drive@%x/disk@%x", chanid, slave);
- return find_prio(desc);
-}
-
-int bootprio_find_fdc_device(struct pci_device *pci, int port, int fdid)
-{
- if (CONFIG_CSM)
- return csm_bootprio_fdc(pci, port, fdid);
- if (!CONFIG_BOOTORDER)
- return -1;
- if (!pci)
- // support only pci machine for now
- return -1;
- // Find floppy - for example: /pci@i0cf8/isa@1/fdc@03f1/floppy@0
- char desc[256], *p;
- p = build_pci_path(desc, sizeof(desc), "isa", pci);
- snprintf(p, desc+sizeof(desc)-p, "/fdc@%04x/floppy@%x", port, fdid);
- return find_prio(desc);
-}
-
-int bootprio_find_pci_rom(struct pci_device *pci, int instance)
-{
- if (!CONFIG_BOOTORDER)
- return -1;
- // Find pci rom - for example: /pci@i0cf8/scsi@3:rom2
- char desc[256], *p;
- p = build_pci_path(desc, sizeof(desc), "*", pci);
- if (instance)
- snprintf(p, desc+sizeof(desc)-p, ":rom%x", instance);
- return find_prio(desc);
-}
-
-int bootprio_find_named_rom(const char *name, int instance)
-{
- if (!CONFIG_BOOTORDER)
- return -1;
- // Find named rom - for example: /rom@genroms/linuxboot.bin
- char desc[256], *p;
- p = desc + snprintf(desc, sizeof(desc), "/rom@%s", name);
- if (instance)
- snprintf(p, desc+sizeof(desc)-p, ":rom%x", instance);
- return find_prio(desc);
-}
-
-static char *
-build_usb_path(char *buf, int max, struct usbhub_s *hub)
-{
- if (!hub->usbdev)
- // Root hub - nothing to add.
- return buf;
- char *p = build_usb_path(buf, max, hub->usbdev->hub);
- p += snprintf(p, buf+max-p, "/hub@%x", hub->usbdev->port+1);
- return p;
-}
-
-int bootprio_find_usb(struct usbdevice_s *usbdev, int lun)
-{
- if (!CONFIG_BOOTORDER)
- return -1;
- // Find usb - for example: /pci@i0cf8/usb@1,2/storage@1/channel@0/disk@0,0
- char desc[256], *p;
- p = build_pci_path(desc, sizeof(desc), "usb", usbdev->hub->cntl->pci);
- p = build_usb_path(p, desc+sizeof(desc)-p, usbdev->hub);
- snprintf(p, desc+sizeof(desc)-p, "/storage@%x/*@0/*@0,%x"
- , usbdev->port+1, lun);
- int ret = find_prio(desc);
- if (ret >= 0)
- return ret;
- // Try usb-host/redir - for example: /pci@i0cf8/usb@1,2/usb-host@1
- snprintf(p, desc+sizeof(desc)-p, "/usb-*@%x", usbdev->port+1);
- return find_prio(desc);
-}
-
-
-/****************************************************************
- * Boot setup
- ****************************************************************/
-
-static int BootRetryTime;
-static int CheckFloppySig = 1;
-
-#define DEFAULT_PRIO 9999
-
-static int DefaultFloppyPrio = 101;
-static int DefaultCDPrio = 102;
-static int DefaultHDPrio = 103;
-static int DefaultBEVPrio = 104;
-
-void
-boot_init(void)
-{
- if (! CONFIG_BOOT)
- return;
-
- if (CONFIG_QEMU) {
- // On emulators, get boot order from nvram.
- if (rtc_read(CMOS_BIOS_BOOTFLAG1) & 1)
- CheckFloppySig = 0;
- u32 bootorder = (rtc_read(CMOS_BIOS_BOOTFLAG2)
- | ((rtc_read(CMOS_BIOS_BOOTFLAG1) & 0xf0) << 4));
- DefaultFloppyPrio = DefaultCDPrio = DefaultHDPrio
- = DefaultBEVPrio = DEFAULT_PRIO;
- int i;
- for (i=101; i<104; i++) {
- u32 val = bootorder & 0x0f;
- bootorder >>= 4;
- switch (val) {
- case 1: DefaultFloppyPrio = i; break;
- case 2: DefaultHDPrio = i; break;
- case 3: DefaultCDPrio = i; break;
- case 4: DefaultBEVPrio = i; break;
- }
- }
- }
-
- BootRetryTime = romfile_loadint("etc/boot-fail-wait", 60*1000);
-
- loadBootOrder();
-}
-
-
-/****************************************************************
- * BootList handling
- ****************************************************************/
-
-struct bootentry_s {
- int type;
- union {
- u32 data;
- struct segoff_s vector;
- struct drive_s *drive;
- };
- int priority;
- const char *description;
- struct hlist_node node;
-};
-static struct hlist_head BootList VARVERIFY32INIT;
-
-#define IPL_TYPE_FLOPPY 0x01
-#define IPL_TYPE_HARDDISK 0x02
-#define IPL_TYPE_CDROM 0x03
-#define IPL_TYPE_CBFS 0x20
-#define IPL_TYPE_BEV 0x80
-#define IPL_TYPE_BCV 0x81
-#define IPL_TYPE_HALT 0xf0
-
-static void
-bootentry_add(int type, int prio, u32 data, const char *desc)
-{
- if (! CONFIG_BOOT)
- return;
- struct bootentry_s *be = malloc_tmp(sizeof(*be));
- if (!be) {
- warn_noalloc();
- return;
- }
- be->type = type;
- be->priority = prio;
- be->data = data;
- be->description = desc ?: "?";
- dprintf(3, "Registering bootable: %s (type:%d prio:%d data:%x)\n"
- , be->description, type, prio, data);
-
- // Add entry in sorted order.
- struct hlist_node **pprev;
- struct bootentry_s *pos;
- hlist_for_each_entry_pprev(pos, pprev, &BootList, node) {
- if (be->priority < pos->priority)
- break;
- if (be->priority > pos->priority)
- continue;
- if (be->type < pos->type)
- break;
- if (be->type > pos->type)
- continue;
- if (be->type <= IPL_TYPE_CDROM
- && (be->drive->type < pos->drive->type
- || (be->drive->type == pos->drive->type
- && be->drive->cntl_id < pos->drive->cntl_id)))
- break;
- }
- hlist_add(&be->node, pprev);
-}
-
-// Return the given priority if it's set - defaultprio otherwise.
-static inline int defPrio(int priority, int defaultprio) {
- return (priority < 0) ? defaultprio : priority;
-}
-
-// Add a BEV vector for a given pnp compatible option rom.
-void
-boot_add_bev(u16 seg, u16 bev, u16 desc, int prio)
-{
- bootentry_add(IPL_TYPE_BEV, defPrio(prio, DefaultBEVPrio)
- , SEGOFF(seg, bev).segoff
- , desc ? MAKE_FLATPTR(seg, desc) : "Unknown");
- DefaultBEVPrio = DEFAULT_PRIO;
-}
-
-// Add a bcv entry for an expansion card harddrive or legacy option rom
-void
-boot_add_bcv(u16 seg, u16 ip, u16 desc, int prio)
-{
- bootentry_add(IPL_TYPE_BCV, defPrio(prio, DefaultHDPrio)
- , SEGOFF(seg, ip).segoff
- , desc ? MAKE_FLATPTR(seg, desc) : "Legacy option rom");
-}
-
-void
-boot_add_floppy(struct drive_s *drive_g, const char *desc, int prio)
-{
- bootentry_add(IPL_TYPE_FLOPPY, defPrio(prio, DefaultFloppyPrio)
- , (u32)drive_g, desc);
-}
-
-void
-boot_add_hd(struct drive_s *drive_g, const char *desc, int prio)
-{
- bootentry_add(IPL_TYPE_HARDDISK, defPrio(prio, DefaultHDPrio)
- , (u32)drive_g, desc);
-}
-
-void
-boot_add_cd(struct drive_s *drive_g, const char *desc, int prio)
-{
- bootentry_add(IPL_TYPE_CDROM, defPrio(prio, DefaultCDPrio)
- , (u32)drive_g, desc);
-}
-
-// Add a CBFS payload entry
-void
-boot_add_cbfs(void *data, const char *desc, int prio)
-{
- bootentry_add(IPL_TYPE_CBFS, defPrio(prio, DEFAULT_PRIO), (u32)data, desc);
-}
-
-
-/****************************************************************
- * Keyboard calls
- ****************************************************************/
-
-// See if a keystroke is pending in the keyboard buffer.
-static int
-check_for_keystroke(void)
-{
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.flags = F_IF|F_ZF;
- br.ah = 1;
- call16_int(0x16, &br);
- return !(br.flags & F_ZF);
-}
-
-// Return a keystroke - waiting forever if necessary.
-static int
-get_raw_keystroke(void)
-{
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.flags = F_IF;
- call16_int(0x16, &br);
- return br.ah;
-}
-
-// Read a keystroke - waiting up to 'msec' milliseconds.
-static int
-get_keystroke(int msec)
-{
- u32 end = irqtimer_calc(msec);
- for (;;) {
- if (check_for_keystroke())
- return get_raw_keystroke();
- if (irqtimer_check(end))
- return -1;
- yield_toirq();
- }
-}
-
-
-/****************************************************************
- * Boot menu and BCV execution
- ****************************************************************/
-
-#define DEFAULT_BOOTMENU_WAIT 2500
-
-// Show IPL option menu.
-void
-interactive_bootmenu(void)
-{
- // XXX - show available drives?
-
- if (! CONFIG_BOOTMENU || !romfile_loadint("etc/show-boot-menu", 1))
- return;
-
- while (get_keystroke(0) >= 0)
- ;
-
- char *bootmsg = romfile_loadfile("etc/boot-menu-message", NULL);
- int menukey = romfile_loadint("etc/boot-menu-key", 1);
- printf("%s", bootmsg ?: "\nPress ESC for boot menu.\n\n");
- free(bootmsg);
-
- u32 menutime = romfile_loadint("etc/boot-menu-wait", DEFAULT_BOOTMENU_WAIT);
- enable_bootsplash();
- int scan_code = get_keystroke(menutime);
- disable_bootsplash();
- if (scan_code != menukey)
- return;
-
- while (get_keystroke(0) >= 0)
- ;
-
- printf("Select boot device:\n\n");
- wait_threads();
-
- // Show menu items
- int maxmenu = 0;
- struct bootentry_s *pos;
- hlist_for_each_entry(pos, &BootList, node) {
- char desc[60];
- maxmenu++;
- printf("%d. %s\n", maxmenu
- , strtcpy(desc, pos->description, ARRAY_SIZE(desc)));
- }
-
- // Get key press. If the menu key is ESC, do not restart boot unless
- // 1.5 seconds have passed. Otherwise users (trained by years of
- // repeatedly hitting keys to enter the BIOS) will end up hitting ESC
- // multiple times and immediately booting the primary boot device.
- int esc_accepted_time = irqtimer_calc(menukey == 1 ? 1500 : 0);
- for (;;) {
- scan_code = get_keystroke(1000);
- if (scan_code == 1 && !irqtimer_check(esc_accepted_time))
- continue;
- if (scan_code >= 1 && scan_code <= maxmenu+1)
- break;
- }
- printf("\n");
- if (scan_code == 0x01)
- // ESC
- return;
-
- // Find entry and make top priority.
- int choice = scan_code - 1;
- hlist_for_each_entry(pos, &BootList, node) {
- if (! --choice)
- break;
- }
- hlist_del(&pos->node);
- pos->priority = 0;
- hlist_add_head(&pos->node, &BootList);
-}
-
-// BEV (Boot Execution Vector) list
-struct bev_s {
- int type;
- u32 vector;
-};
-static struct bev_s BEV[20];
-static int BEVCount;
-static int HaveHDBoot, HaveFDBoot;
-
-static void
-add_bev(int type, u32 vector)
-{
- if (type == IPL_TYPE_HARDDISK && HaveHDBoot++)
- return;
- if (type == IPL_TYPE_FLOPPY && HaveFDBoot++)
- return;
- if (BEVCount >= ARRAY_SIZE(BEV))
- return;
- struct bev_s *bev = &BEV[BEVCount++];
- bev->type = type;
- bev->vector = vector;
-}
-
-// Prepare for boot - show menu and run bcvs.
-void
-bcv_prepboot(void)
-{
- if (! CONFIG_BOOT)
- return;
-
- int haltprio = find_prio("HALT");
- if (haltprio >= 0)
- bootentry_add(IPL_TYPE_HALT, haltprio, 0, "HALT");
-
- // Map drives and populate BEV list
- struct bootentry_s *pos;
- hlist_for_each_entry(pos, &BootList, node) {
- switch (pos->type) {
- case IPL_TYPE_BCV:
- call_bcv(pos->vector.seg, pos->vector.offset);
- add_bev(IPL_TYPE_HARDDISK, 0);
- break;
- case IPL_TYPE_FLOPPY:
- map_floppy_drive(pos->drive);
- add_bev(IPL_TYPE_FLOPPY, 0);
- break;
- case IPL_TYPE_HARDDISK:
- map_hd_drive(pos->drive);
- add_bev(IPL_TYPE_HARDDISK, 0);
- break;
- case IPL_TYPE_CDROM:
- map_cd_drive(pos->drive);
- // NO BREAK
- default:
- add_bev(pos->type, pos->data);
- break;
- }
- }
-
- // If nothing added a floppy/hd boot - add it manually.
- add_bev(IPL_TYPE_FLOPPY, 0);
- add_bev(IPL_TYPE_HARDDISK, 0);
-}
-
-
-/****************************************************************
- * Boot code (int 18/19)
- ****************************************************************/
-
-// Jump to a bootup entry point.
-static void
-call_boot_entry(struct segoff_s bootsegip, u8 bootdrv)
-{
- dprintf(1, "Booting from %04x:%04x\n", bootsegip.seg, bootsegip.offset);
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.flags = F_IF;
- br.code = bootsegip;
- // Set the magic number in ax and the boot drive in dl.
- br.dl = bootdrv;
- br.ax = 0xaa55;
- farcall16(&br);
-}
-
-// Boot from a disk (either floppy or harddrive)
-static void
-boot_disk(u8 bootdrv, int checksig)
-{
- u16 bootseg = 0x07c0;
-
- // Read sector
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.flags = F_IF;
- br.dl = bootdrv;
- br.es = bootseg;
- br.ah = 2;
- br.al = 1;
- br.cl = 1;
- call16_int(0x13, &br);
-
- if (br.flags & F_CF) {
- printf("Boot failed: could not read the boot disk\n\n");
- return;
- }
-
- if (checksig) {
- struct mbr_s *mbr = (void*)0;
- if (GET_FARVAR(bootseg, mbr->signature) != MBR_SIGNATURE) {
- printf("Boot failed: not a bootable disk\n\n");
- return;
- }
- }
-
- tpm_add_bcv(bootdrv, MAKE_FLATPTR(bootseg, 0), 512);
-
- /* Canonicalize bootseg:bootip */
- u16 bootip = (bootseg & 0x0fff) << 4;
- bootseg &= 0xf000;
-
- call_boot_entry(SEGOFF(bootseg, bootip), bootdrv);
-}
-
-// Boot from a CD-ROM
-static void
-boot_cdrom(struct drive_s *drive_g)
-{
- if (! CONFIG_CDROM_BOOT)
- return;
- printf("Booting from DVD/CD...\n");
-
- int status = cdrom_boot(drive_g);
- if (status) {
- printf("Boot failed: Could not read from CDROM (code %04x)\n", status);
- return;
- }
-
- u8 bootdrv = CDEmu.emulated_drive;
- u16 bootseg = CDEmu.load_segment;
-
- tpm_add_cdrom(bootdrv, MAKE_FLATPTR(bootseg, 0), 512);
-
- /* Canonicalize bootseg:bootip */
- u16 bootip = (bootseg & 0x0fff) << 4;
- bootseg &= 0xf000;
-
- call_boot_entry(SEGOFF(bootseg, bootip), bootdrv);
-}
-
-// Boot from a CBFS payload
-static void
-boot_cbfs(struct cbfs_file *file)
-{
- if (!CONFIG_COREBOOT_FLASH)
- return;
- printf("Booting from CBFS...\n");
- cbfs_run_payload(file);
-}
-
-// Boot from a BEV entry on an optionrom.
-static void
-boot_rom(u32 vector)
-{
- printf("Booting from ROM...\n");
- struct segoff_s so;
- so.segoff = vector;
- call_boot_entry(so, 0);
-}
-
-// Unable to find bootable device - warn user and eventually retry.
-static void
-boot_fail(void)
-{
- if (BootRetryTime == (u32)-1)
- printf("No bootable device.\n");
- else
- printf("No bootable device. Retrying in %d seconds.\n"
- , BootRetryTime/1000);
- // Wait for 'BootRetryTime' milliseconds and then reboot.
- u32 end = irqtimer_calc(BootRetryTime);
- for (;;) {
- if (BootRetryTime != (u32)-1 && irqtimer_check(end))
- break;
- yield_toirq();
- }
- printf("Rebooting.\n");
- reset();
-}
-
-// Determine next boot method and attempt a boot using it.
-static void
-do_boot(int seq_nr)
-{
- if (! CONFIG_BOOT)
- panic("Boot support not compiled in.\n");
-
- if (seq_nr >= BEVCount)
- boot_fail();
-
- // Boot the given BEV type.
- struct bev_s *ie = &BEV[seq_nr];
- switch (ie->type) {
- case IPL_TYPE_FLOPPY:
- printf("Booting from Floppy...\n");
- boot_disk(0x00, CheckFloppySig);
- break;
- case IPL_TYPE_HARDDISK:
- printf("Booting from Hard Disk...\n");
- boot_disk(0x80, 1);
- break;
- case IPL_TYPE_CDROM:
- boot_cdrom((void*)ie->vector);
- break;
- case IPL_TYPE_CBFS:
- boot_cbfs((void*)ie->vector);
- break;
- case IPL_TYPE_BEV:
- boot_rom(ie->vector);
- break;
- case IPL_TYPE_HALT:
- boot_fail();
- break;
- }
-
- // Boot failed: invoke the boot recovery function
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.flags = F_IF;
- call16_int(0x18, &br);
-}
-
-int BootSequence VARLOW = -1;
-
-// Boot Failure recovery: try the next device.
-void VISIBLE32FLAT
-handle_18(void)
-{
- debug_enter(NULL, DEBUG_HDL_18);
- int seq = BootSequence + 1;
- BootSequence = seq;
- do_boot(seq);
-}
-
-// INT 19h Boot Load Service Entry Point
-void VISIBLE32FLAT
-handle_19(void)
-{
- debug_enter(NULL, DEBUG_HDL_19);
- BootSequence = 0;
- do_boot(0);
-}