diff options
author | Collin L. Walling <walling@linux.vnet.ibm.com> | 2018-02-23 10:43:08 -0500 |
---|---|---|
committer | Thomas Huth <thuth@redhat.com> | 2018-02-26 07:56:54 +0100 |
commit | 80beedcc387062a71c6563dfae0f607b396c2bfb (patch) | |
tree | 22e934fcc08f38a515f671fc79be994fe6123bc3 /pc-bios | |
parent | 5340eb072ffc36ccd33c67dcea0d5c939b492e98 (diff) | |
download | qemu-80beedcc387062a71c6563dfae0f607b396c2bfb.zip qemu-80beedcc387062a71c6563dfae0f607b396c2bfb.tar.gz qemu-80beedcc387062a71c6563dfae0f607b396c2bfb.tar.bz2 |
s390-ccw: refactor eckd_block_num to use CHS
Add new cylinder/head/sector struct. Use it to calculate
eckd block numbers instead of a BootMapPointer (which used
eckd chs anyway).
Signed-off-by: Collin L. Walling <walling@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'pc-bios')
-rw-r--r-- | pc-bios/s390-ccw/bootmap.c | 28 | ||||
-rw-r--r-- | pc-bios/s390-ccw/bootmap.h | 8 |
2 files changed, 20 insertions, 16 deletions
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index a4eaf24..9534f56 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -95,32 +95,32 @@ static inline void verify_boot_info(BootInfo *bip) "Bad block size in zIPL section of the 1st record."); } -static block_number_t eckd_block_num(BootMapPointer *p) +static block_number_t eckd_block_num(EckdCHS *chs) { const uint64_t sectors = virtio_get_sectors(); const uint64_t heads = virtio_get_heads(); - const uint64_t cylinder = p->eckd.cylinder - + ((p->eckd.head & 0xfff0) << 12); - const uint64_t head = p->eckd.head & 0x000f; + const uint64_t cylinder = chs->cylinder + + ((chs->head & 0xfff0) << 12); + const uint64_t head = chs->head & 0x000f; const block_number_t block = sectors * heads * cylinder + sectors * head - + p->eckd.sector + + chs->sector - 1; /* block nr starts with zero */ return block; } static bool eckd_valid_address(BootMapPointer *p) { - const uint64_t head = p->eckd.head & 0x000f; + const uint64_t head = p->eckd.chs.head & 0x000f; if (head >= virtio_get_heads() - || p->eckd.sector > virtio_get_sectors() - || p->eckd.sector <= 0) { + || p->eckd.chs.sector > virtio_get_sectors() + || p->eckd.chs.sector <= 0) { return false; } if (!virtio_guessed_disk_nature() && - eckd_block_num(p) >= virtio_get_blocks()) { + eckd_block_num(&p->eckd.chs) >= virtio_get_blocks()) { return false; } @@ -140,7 +140,7 @@ static block_number_t load_eckd_segments(block_number_t blk, uint64_t *address) do { more_data = false; for (j = 0;; j++) { - block_nr = eckd_block_num((void *)&(bprs[j].xeckd)); + block_nr = eckd_block_num(&bprs[j].xeckd.bptr.chs); if (is_null_block_number(block_nr)) { /* end of chunk */ break; } @@ -198,7 +198,7 @@ static void run_eckd_boot_script(block_number_t bmt_block_nr) memset(sec, FREE_SPACE_FILLER, sizeof(sec)); read_block(bmt_block_nr, sec, "Cannot read Boot Map Table"); - block_nr = eckd_block_num(&bmt->entry[loadparm]); + block_nr = eckd_block_num(&bmt->entry[loadparm].xeckd.bptr.chs); IPL_assert(block_nr != -1, "Cannot find Boot Map Table Entry"); memset(sec, FREE_SPACE_FILLER, sizeof(sec)); @@ -206,7 +206,7 @@ static void run_eckd_boot_script(block_number_t bmt_block_nr) for (i = 0; bms->entry[i].type == BOOT_SCRIPT_LOAD; i++) { address = bms->entry[i].address.load_address; - block_nr = eckd_block_num(&(bms->entry[i].blkptr)); + block_nr = eckd_block_num(&bms->entry[i].blkptr.xeckd.bptr.chs); do { block_nr = load_eckd_segments(block_nr, &address); @@ -239,7 +239,7 @@ static void ipl_eckd_cdl(void) "Non-ECKD device type in zIPL section of IPL2 record."); /* save pointer to Boot Map Table */ - bmt_block_nr = eckd_block_num(&mbr->blockptr); + bmt_block_nr = eckd_block_num(&mbr->blockptr.xeckd.bptr.chs); memset(sec, FREE_SPACE_FILLER, sizeof(sec)); read_block(2, vlbl, "Cannot read Volume Label at block 2"); @@ -300,7 +300,7 @@ static void ipl_eckd_ldl(ECKD_IPL_mode_t mode) verify_boot_info(bip); /* save pointer to Boot Map Table */ - bmt_block_nr = eckd_block_num((void *)&bip->bp.ipl.bm_ptr.eckd.bptr); + bmt_block_nr = eckd_block_num(&bip->bp.ipl.bm_ptr.eckd.bptr.chs); run_eckd_boot_script(bmt_block_nr); /* no return */ diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h index 486c0f3..b361084 100644 --- a/pc-bios/s390-ccw/bootmap.h +++ b/pc-bios/s390-ccw/bootmap.h @@ -32,10 +32,14 @@ typedef struct FbaBlockPtr { uint16_t blockct; } __attribute__ ((packed)) FbaBlockPtr; -typedef struct EckdBlockPtr { - uint16_t cylinder; /* cylinder/head/sector is an address of the block */ +typedef struct EckdCHS { + uint16_t cylinder; uint16_t head; uint8_t sector; +} __attribute__ ((packed)) EckdCHS; + +typedef struct EckdBlockPtr { + EckdCHS chs; /* cylinder/head/sector is an address of the block */ uint16_t size; uint8_t count; /* (size_in_blocks-1); * it's 0 for TablePtr, ScriptPtr, and SectionPtr */ |