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pc-bios/s390-ccw: add boot entry selection for ECKD DASD 

1. change a bit definition of ScsiMbr to allow an array of pointers
2. add loadparm fetch to boot script processing
3. apply loadparm index to boot entry selection, if any

Initial patch from Eugene (jno) Dvurechenski.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Farhan Ali <alifm@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Farhan Ali 2016-04-18 13:45:32 +02:00 committed by Cornelia Huck
parent 9dd7823b70
commit 82ca394194
2 changed files with 12 additions and 6 deletions
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16
pc-bios/s390-ccw/bootmap.c
View File

@ -183,15 +183,21 @@ static block_number_t load_eckd_segments(block_number_t blk, uint64_t *address)
static void run_eckd_boot_script(block_number_t mbr_block_nr)
{
int i;
unsigned int loadparm = get_loadparm_index();
block_number_t block_nr;
uint64_t address;
ScsiMbr *scsi_mbr = (void *)sec;
ScsiMbr *bte = (void *)sec; /* Eckd bootmap table entry */
BootMapScript *bms = (void *)sec;
debug_print_int("loadparm", loadparm);
IPL_assert(loadparm < 31, "loadparm value greater than"
" maximum number of boot entries allowed");
memset(sec, FREE_SPACE_FILLER, sizeof(sec));
read_block(mbr_block_nr, sec, "Cannot read MBR");
block_nr = eckd_block_num((void *)&(scsi_mbr->blockptr));
block_nr = eckd_block_num((void *)&(bte->blockptr[loadparm]));
IPL_assert(block_nr != -1, "No Boot Map");
memset(sec, FREE_SPACE_FILLER, sizeof(sec));
read_block(block_nr, sec, "Cannot read Boot Map Script");
@ -459,11 +465,11 @@ static void ipl_scsi(void)
debug_print_int("MBR Version", mbr->version_id);
IPL_check(mbr->version_id == 1,
"Unknown MBR layout version, assuming version 1");
debug_print_int("program table", mbr->blockptr.blockno);
IPL_assert(mbr->blockptr.blockno, "No Program Table");
debug_print_int("program table", mbr->blockptr[0].blockno);
IPL_assert(mbr->blockptr[0].blockno, "No Program Table");
/* Parse the program table */
read_block(mbr->blockptr.blockno, sec,
read_block(mbr->blockptr[0].blockno, sec,
"Error reading Program Table");
IPL_assert(magic_match(sec, ZIPL_MAGIC), "No zIPL magic in PT");

2
pc-bios/s390-ccw/bootmap.h
View File

@ -70,7 +70,7 @@ typedef struct ScsiMbr {
uint8_t magic[4];
uint32_t version_id;
uint8_t reserved[8];
ScsiBlockPtr blockptr;
ScsiBlockPtr blockptr[];
} __attribute__ ((packed)) ScsiMbr;
#define ZIPL_MAGIC "zIPL"