diff options
Diffstat (limited to 'qemu/roms/seabios/src/boot.c')
| -rw-r--r-- | qemu/roms/seabios/src/boot.c | 756 |
1 files changed, 756 insertions, 0 deletions
diff --git a/qemu/roms/seabios/src/boot.c b/qemu/roms/seabios/src/boot.c new file mode 100644 index 000000000..f23e9e154 --- /dev/null +++ b/qemu/roms/seabios/src/boot.c @@ -0,0 +1,756 @@ +// 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 + + +/**************************************************************** + * 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 { + if (pci->rootbus) + p += snprintf(p, max, "/pci-root@%x", pci->rootbus); + p += snprintf(p, buf+max-p, "%s", FW_PCI_DOMAIN); + } + + 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", 0x86); + printf("%s", bootmsg ?: "\nPress F12 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 + for (;;) { + scan_code = get_keystroke(1000); + 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; + } + } + + /* 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; + /* 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); +} |