diff options
| -rw-r--r-- | pc-bios/s390-ccw/bootmap.c | 111 |
1 files changed, 76 insertions, 35 deletions
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index 711a518..54e0f17 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -315,6 +315,40 @@ static void print_eckd_msg(void) sclp_print(msg); } +static void ipl_eckd(void) +{ + ScsiMbr *mbr = (void *)sec; + LDL_VTOC *vlbl = (void *)sec; + + print_eckd_msg(); + + /* Grab the MBR again */ + memset(sec, FREE_SPACE_FILLER, sizeof(sec)); + read_block(0, mbr, "Cannot read block 0 on DASD"); + + if (magic_match(mbr->magic, IPL1_MAGIC)) { + ipl_eckd_cdl(); /* no return */ + } + + /* LDL/CMS? */ + memset(sec, FREE_SPACE_FILLER, sizeof(sec)); + read_block(2, vlbl, "Cannot read block 2"); + + if (magic_match(vlbl->magic, CMS1_MAGIC)) { + ipl_eckd_ldl(ECKD_CMS); /* no return */ + } + if (magic_match(vlbl->magic, LNX1_MAGIC)) { + ipl_eckd_ldl(ECKD_LDL); /* no return */ + } + + ipl_eckd_ldl(ECKD_LDL_UNLABELED); /* it still may return */ + /* + * Ok, it is not a LDL by any means. + * It still might be a CDL with zero record keys for IPL1 and IPL2 + */ + ipl_eckd_cdl(); +} + /*********************************************************************** * IPL a SCSI disk */ @@ -412,7 +446,13 @@ static void ipl_scsi(void) const int pte_len = sizeof(ScsiBlockPtr); ScsiBlockPtr *prog_table_entry; - /* The 0-th block (MBR) was already read into sec[] */ + /* Grab the MBR */ + memset(sec, FREE_SPACE_FILLER, sizeof(sec)); + read_block(0, mbr, "Cannot read block 0"); + + if (!magic_match(mbr->magic, ZIPL_MAGIC)) { + return; + } sclp_print("Using SCSI scheme.\n"); debug_print_int("MBR Version", mbr->version_id); @@ -649,57 +689,58 @@ static void ipl_iso_el_torito(void) } /*********************************************************************** - * IPL starts here + * Bus specific IPL sequences */ -void zipl_load(void) +static void zipl_load_vblk(void) { - ScsiMbr *mbr = (void *)sec; - LDL_VTOC *vlbl = (void *)sec; - - /* Grab the MBR */ - memset(sec, FREE_SPACE_FILLER, sizeof(sec)); - read_block(0, mbr, "Cannot read block 0"); - - dputs("checking magic\n"); - - if (magic_match(mbr->magic, ZIPL_MAGIC)) { - ipl_scsi(); /* no return */ - } - - /* Check if we can boot as ISO media */ if (virtio_guessed_disk_nature()) { virtio_assume_iso9660(); } ipl_iso_el_torito(); - /* We have failed to follow the SCSI scheme, so */ if (virtio_guessed_disk_nature()) { sclp_print("Using guessed DASD geometry.\n"); virtio_assume_eckd(); } - print_eckd_msg(); - if (magic_match(mbr->magic, IPL1_MAGIC)) { - ipl_eckd_cdl(); /* no return */ + ipl_eckd(); +} + +static void zipl_load_vscsi(void) +{ + if (virtio_get_block_size() == VIRTIO_ISO_BLOCK_SIZE) { + /* Is it an ISO image in non-CD drive? */ + ipl_iso_el_torito(); } - /* LDL/CMS? */ - memset(sec, FREE_SPACE_FILLER, sizeof(sec)); - read_block(2, vlbl, "Cannot read block 2"); + sclp_print("Using guessed DASD geometry.\n"); + virtio_assume_eckd(); + ipl_eckd(); +} - if (magic_match(vlbl->magic, CMS1_MAGIC)) { - ipl_eckd_ldl(ECKD_CMS); /* no return */ - } - if (magic_match(vlbl->magic, LNX1_MAGIC)) { - ipl_eckd_ldl(ECKD_LDL); /* no return */ +/*********************************************************************** + * IPL starts here + */ + +void zipl_load(void) +{ + if (virtio_get_device()->is_cdrom) { + ipl_iso_el_torito(); + panic("\n! Cannot IPL this ISO image !\n"); } - ipl_eckd_ldl(ECKD_LDL_UNLABELED); /* it still may return */ - /* - * Ok, it is not a LDL by any means. - * It still might be a CDL with zero record keys for IPL1 and IPL2 - */ - ipl_eckd_cdl(); + ipl_scsi(); + + switch (virtio_get_device_type()) { + case VIRTIO_ID_BLOCK: + zipl_load_vblk(); + break; + case VIRTIO_ID_SCSI: + zipl_load_vscsi(); + break; + default: + panic("\n! Unknown IPL device type !\n"); + } panic("\n* this can never happen *\n"); } |