1 // Code to load disk image and start system boot.
3 // Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2002 MandrakeSoft S.A.
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "util.h" // dprintf
9 #include "biosvar.h" // GET_EBDA
10 #include "config.h" // CONFIG_*
11 #include "disk.h" // cdrom_boot
12 #include "bregs.h" // struct bregs
13 #include "boot.h" // struct ipl_s
14 #include "cmos.h" // inb_cmos
20 /****************************************************************
21 * IPL and BCV handlers
22 ****************************************************************/
29 dprintf(3, "init boot device ordering\n");
31 memset(&IPL, 0, sizeof(IPL));
32 struct ipl_entry_s *ie = &IPL.bev[0];
35 ie->type = IPL_TYPE_FLOPPY;
36 ie->description = "Floppy";
40 ie->type = IPL_TYPE_HARDDISK;
41 ie->description = "Hard Disk";
45 if (CONFIG_CDROM_BOOT) {
46 ie->type = IPL_TYPE_CDROM;
47 ie->description = "DVD/CD";
51 if (CONFIG_COREBOOT && CONFIG_COREBOOT_FLASH) {
52 ie->type = IPL_TYPE_CBFS;
53 ie->description = "CBFS";
57 IPL.bevcount = ie - IPL.bev;
58 SET_EBDA(boot_sequence, 0xffff);
59 if (CONFIG_COREBOOT) {
60 // XXX - hardcode defaults for coreboot.
61 IPL.bootorder = 0x87654231;
62 IPL.checkfloppysig = 1;
64 // On emulators, get boot order from nvram.
65 IPL.bootorder = (inb_cmos(CMOS_BIOS_BOOTFLAG2)
66 | ((inb_cmos(CMOS_BIOS_BOOTFLAG1) & 0xf0) << 4));
67 if (!(inb_cmos(CMOS_BIOS_BOOTFLAG1) & 1))
68 IPL.checkfloppysig = 1;
71 u32 file = romfile_find("bootorder");
75 int filesize = romfile_size(file);
76 dprintf(3, "bootorder file found (len %d)\n", filesize);
81 char *f = malloc_tmphigh(filesize);
88 romfile_copy(file, f, filesize);
90 IPL.fw_bootorder_count = 1;
93 IPL.fw_bootorder_count++;
96 IPL.fw_bootorder = malloc_tmphigh(IPL.fw_bootorder_count*sizeof(char*));
97 if (!IPL.fw_bootorder) {
103 dprintf(3, "boot order:\n");
106 IPL.fw_bootorder[i] = f;
111 dprintf(3, "%d: %s\n", i, IPL.fw_bootorder[i]);
117 // Add a BEV vector for a given pnp compatible option rom.
119 add_bev(u16 seg, u16 bev, u16 desc)
123 if (IPL.bevcount >= ARRAY_SIZE(IPL.bev))
126 struct ipl_entry_s *ie = &IPL.bev[IPL.bevcount++];
127 ie->type = IPL_TYPE_BEV;
128 ie->vector = (seg << 16) | bev;
129 const char *d = "Unknown";
131 d = MAKE_FLATPTR(seg, desc);
135 // Add a IPL entry for BAID cdrom.
137 add_baid_cdrom(struct drive_s *drive_g)
139 if (! CONFIG_CDROM_BOOT)
142 /* put first cdrom into ipl 3 for compatability with qemu */
143 struct ipl_entry_s *ie = &IPL.bev[2];
144 if (IPL.bevcount >= ARRAY_SIZE(IPL.bev) && ie->vector)
148 ie = &IPL.bev[IPL.bevcount++];
149 ie->type = IPL_TYPE_CDROM;
150 ie->vector = (u32)drive_g;
151 ie->description = "DVD/CD";
154 // Add a bcv entry for an expansion card harddrive or legacy option rom
156 add_bcv(u16 seg, u16 ip, u16 desc)
160 if (IPL.bcvcount >= ARRAY_SIZE(IPL.bcv))
163 struct ipl_entry_s *ie = &IPL.bcv[IPL.bcvcount++];
164 ie->type = BCV_TYPE_EXTERNAL;
165 ie->vector = (seg << 16) | ip;
166 const char *d = "Legacy option rom";
168 d = MAKE_FLATPTR(seg, desc);
172 // Add a bcv entry for an internal harddrive
174 add_bcv_internal(struct drive_s *drive_g)
178 if (IPL.bcvcount >= ARRAY_SIZE(IPL.bcv))
181 struct ipl_entry_s *ie = &IPL.bcv[IPL.bcvcount++];
182 if (CONFIG_THREADS) {
183 // Add to bcv list with assured drive order.
184 struct ipl_entry_s *end = ie;
186 struct ipl_entry_s *prev = ie - 1;
187 if (prev < IPL.bcv || prev->type != BCV_TYPE_INTERNAL)
189 struct drive_s *prevdrive = (void*)prev->vector;
190 if (prevdrive->type < drive_g->type
191 || (prevdrive->type == drive_g->type
192 && prevdrive->cntl_id < drive_g->cntl_id))
197 memmove(ie+1, ie, (void*)end-(void*)ie);
199 ie->type = BCV_TYPE_INTERNAL;
200 ie->vector = (u32)drive_g;
201 ie->description = "";
205 /****************************************************************
206 * Boot menu and BCV execution
207 ****************************************************************/
209 // Show a generic menu item
211 menu_show_default(struct ipl_entry_s *ie, int menupos)
214 printf("%d. %s\n", menupos
215 , strtcpy(desc, ie->description, ARRAY_SIZE(desc)));
219 // Show floppy menu item - but only if there exists a floppy drive.
221 menu_show_floppy(struct ipl_entry_s *ie, int menupos)
224 for (i = 0; i < Drives.floppycount; i++) {
225 struct drive_s *drive_g = getDrive(EXTTYPE_FLOPPY, i);
226 printf("%d. Floppy [%s]\n", menupos + i, drive_g->desc);
228 return Drives.floppycount;
231 // Show menu items from BCV list.
233 menu_show_harddisk(struct ipl_entry_s *ie, int menupos)
236 for (i = 0; i < IPL.bcvcount; i++) {
237 struct ipl_entry_s *ie = &IPL.bcv[i];
238 struct drive_s *drive_g = (void*)ie->vector;
240 case BCV_TYPE_INTERNAL:
241 printf("%d. %s\n", menupos + i, drive_g->desc);
244 menu_show_default(ie, menupos+i);
251 // Show cdrom menu item - but only if there exists a cdrom drive.
253 menu_show_cdrom(struct ipl_entry_s *ie, int menupos)
255 struct drive_s *drive_g = (void*)ie->vector;
258 printf("%d. DVD/CD [%s]\n", menupos, drive_g->desc);
262 // Show coreboot-fs menu item.
264 menu_show_cbfs(struct ipl_entry_s *ie, int menupos)
267 struct cbfs_file *file = NULL;
269 file = cbfs_findprefix("img/", file);
272 const char *filename = cbfs_filename(file);
273 printf("%d. Payload [%s]\n", menupos + count, &filename[4]);
281 // Show IPL option menu.
283 interactive_bootmenu(void)
285 if (! CONFIG_BOOTMENU || ! qemu_cfg_show_boot_menu())
288 while (get_keystroke(0) >= 0)
291 printf("Press F12 for boot menu.\n\n");
294 int scan_code = get_keystroke(CONFIG_BOOTMENU_WAIT);
295 disable_bootsplash();
296 if (scan_code != 0x86)
300 while (get_keystroke(0) >= 0)
303 printf("Select boot device:\n\n");
306 int subcount[ARRAY_SIZE(IPL.bev)];
309 for (i = 0; i < IPL.bevcount; i++) {
310 struct ipl_entry_s *ie = &IPL.bev[i];
313 case IPL_TYPE_FLOPPY:
314 sc = menu_show_floppy(ie, menupos);
316 case IPL_TYPE_HARDDISK:
317 sc = menu_show_harddisk(ie, menupos);
320 sc = menu_show_cdrom(ie, menupos);
323 sc = menu_show_cbfs(ie, menupos);
326 sc = menu_show_default(ie, menupos);
334 scan_code = get_keystroke(1000);
335 if (scan_code == 0x01)
338 if (scan_code < 1 || scan_code > menupos)
340 int choice = scan_code - 1;
342 // Find out which IPL this was for.
344 while (choice > subcount[bev]) {
345 choice -= subcount[bev];
348 IPL.bev[bev].subchoice = choice-1;
350 // Add user choice to the boot order.
351 IPL.bootorder = (IPL.bootorder << 4) | (bev+1);
357 // Run the specified bcv.
359 run_bcv(struct ipl_entry_s *ie)
362 case BCV_TYPE_INTERNAL:
363 map_hd_drive((void*)ie->vector);
365 case BCV_TYPE_EXTERNAL:
366 call_bcv(ie->vector >> 16, ie->vector & 0xffff);
371 // Prepare for boot - show menu and run bcvs.
380 // XXX - show available drives?
382 // Allow user to modify BCV/IPL order.
383 interactive_bootmenu();
386 // Setup floppy boot order
387 int override = IPL.bev[0].subchoice;
388 struct drive_s *tmp = Drives.idmap[EXTTYPE_FLOPPY][0];
389 Drives.idmap[EXTTYPE_FLOPPY][0] = Drives.idmap[EXTTYPE_FLOPPY][override];
390 Drives.idmap[EXTTYPE_FLOPPY][override] = tmp;
393 override = IPL.bev[1].subchoice;
394 if (override < IPL.bcvcount)
395 run_bcv(&IPL.bcv[override]);
397 for (i=0; i<IPL.bcvcount; i++)
399 run_bcv(&IPL.bcv[i]);
403 /****************************************************************
404 * Boot code (int 18/19)
405 ****************************************************************/
407 // Jump to a bootup entry point.
409 call_boot_entry(u16 bootseg, u16 bootip, u8 bootdrv)
411 dprintf(1, "Booting from %04x:%04x\n", bootseg, bootip);
413 memset(&br, 0, sizeof(br));
415 br.code = SEGOFF(bootseg, bootip);
416 // Set the magic number in ax and the boot drive in dl.
422 // Boot from a disk (either floppy or harddrive)
424 boot_disk(u8 bootdrv, int checksig)
426 u16 bootseg = 0x07c0;
430 memset(&br, 0, sizeof(br));
437 call16_int(0x13, &br);
439 if (br.flags & F_CF) {
440 printf("Boot failed: could not read the boot disk\n\n");
445 struct mbr_s *mbr = (void*)0;
446 if (GET_FARVAR(bootseg, mbr->signature) != MBR_SIGNATURE) {
447 printf("Boot failed: not a bootable disk\n\n");
452 /* Canonicalize bootseg:bootip */
453 u16 bootip = (bootseg & 0x0fff) << 4;
456 call_boot_entry(bootseg, bootip, bootdrv);
459 // Boot from a CD-ROM
461 boot_cdrom(struct ipl_entry_s *ie)
463 if (! CONFIG_CDROM_BOOT)
469 struct drive_s *drive_g = (void*)ie->vector;
470 int status = cdrom_boot(drive_g);
472 printf("Boot failed: Could not read from CDROM %s (code %04x)\n", drive_g->desc, status);
476 u16 ebda_seg = get_ebda_seg();
477 u8 bootdrv = GET_EBDA2(ebda_seg, cdemu.emulated_extdrive);
478 u16 bootseg = GET_EBDA2(ebda_seg, cdemu.load_segment);
479 /* Canonicalize bootseg:bootip */
480 u16 bootip = (bootseg & 0x0fff) << 4;
483 call_boot_entry(bootseg, bootip, bootdrv);
486 // Boot from a CBFS payload
488 boot_cbfs(struct ipl_entry_s *ie)
490 if (!CONFIG_COREBOOT || !CONFIG_COREBOOT_FLASH)
492 int count = ie->subchoice;
493 struct cbfs_file *file = NULL;
495 file = cbfs_findprefix("img/", file);
500 cbfs_run_payload(file);
508 panic("Boot support not compiled in.\n");
510 u32 bootdev = IPL.bootorder;
511 bootdev >>= 4 * seq_nr;
514 /* Translate bootdev to an IPL table offset by subtracting 1 */
517 if (bootdev >= IPL.bevcount) {
518 printf("No bootable device.\n");
519 // Loop with irqs enabled - this allows ctrl+alt+delete to work.
524 /* Do the loading, and set up vector as a far pointer to the boot
525 * address, and bootdrv as the boot drive */
526 struct ipl_entry_s *ie = &IPL.bev[bootdev];
528 printf("Booting from %s...\n"
529 , strtcpy(desc, ie->description, ARRAY_SIZE(desc)));
532 case IPL_TYPE_FLOPPY:
533 boot_disk(0x00, IPL.checkfloppysig);
535 case IPL_TYPE_HARDDISK:
545 call_boot_entry(ie->vector >> 16, ie->vector & 0xffff, 0);
549 // Boot failed: invoke the boot recovery function
551 memset(&br, 0, sizeof(br));
553 call16_int(0x18, &br);
556 // Boot Failure recovery: try the next device.
560 debug_serial_setup();
561 debug_enter(NULL, DEBUG_HDL_18);
562 u16 ebda_seg = get_ebda_seg();
563 u16 seq = GET_EBDA2(ebda_seg, boot_sequence) + 1;
564 SET_EBDA2(ebda_seg, boot_sequence, seq);
568 // INT 19h Boot Load Service Entry Point
572 debug_serial_setup();
573 debug_enter(NULL, DEBUG_HDL_19);
574 SET_EBDA(boot_sequence, 0);