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pc-bios/s390-ccw: cleanup and enhance bootmap defintions 

Add declarations to describe structure of different dasd IPL sources
(eckd and fba). Move the structure definitions to a new header bootmap.h.
While we are at it, change structs to typedefs.

Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Eugene (jno) Dvurechenski 2014-05-19 20:08:54 +02:00 committed by Cornelia Huck
parent abd696e4f7
commit 26f2bbd6b1
2 changed files with 269 additions and 51 deletions
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66
pc-bios/s390-ccw/bootmap.c
View File

@ -9,6 +9,7 @@
*/
#include "s390-ccw.h"
#include "bootmap.h"
/* #define DEBUG_FALLBACK */
@ -20,41 +21,6 @@
do { } while (0)
#endif
struct scsi_blockptr {
uint64_t blockno;
uint16_t size;
uint16_t blockct;
uint8_t reserved[4];
} __attribute__ ((packed));
struct component_entry {
struct scsi_blockptr data;
uint8_t pad[7];
uint8_t component_type;
uint64_t load_address;
} __attribute((packed));
struct component_header {
uint8_t magic[4];
uint8_t type;
uint8_t reserved[27];
} __attribute((packed));
struct mbr {
uint8_t magic[4];
uint32_t version_id;
uint8_t reserved[8];
struct scsi_blockptr blockptr;
} __attribute__ ((packed));
#define ZIPL_MAGIC "zIPL"
#define ZIPL_COMP_HEADER_IPL 0x00
#define ZIPL_COMP_HEADER_DUMP 0x01
#define ZIPL_COMP_ENTRY_LOAD 0x02
#define ZIPL_COMP_ENTRY_EXEC 0x01
/* Scratch space */
static uint8_t sec[SECTOR_SIZE] __attribute__((__aligned__(SECTOR_SIZE)));
@ -118,8 +84,6 @@ static int zipl_magic(uint8_t *ptr)
return 1;
}
#define FREE_SPACE_FILLER '\xAA'
static inline bool unused_space(const void *p, unsigned int size)
{
int i;
@ -133,10 +97,10 @@ static inline bool unused_space(const void *p, unsigned int size)
return true;
}
static int zipl_load_segment(struct component_entry *entry)
static int zipl_load_segment(ComponentEntry *entry)
{
const int max_entries = (SECTOR_SIZE / sizeof(struct scsi_blockptr));
struct scsi_blockptr *bprs = (void *)sec;
const int max_entries = (SECTOR_SIZE / sizeof(ScsiBlockPtr));
ScsiBlockPtr *bprs = (void *)sec;
const int bprs_size = sizeof(sec);
uint64_t blockno;
long address;
@ -170,7 +134,7 @@ static int zipl_load_segment(struct component_entry *entry)
}
if (bprs[i].blockct == 0 && unused_space(&bprs[i + 1],
sizeof(struct scsi_blockptr))) {
sizeof(ScsiBlockPtr))) {
/* This is a "continue" pointer.
* This ptr is the last one in the current script section.
* I.e. the next ptr must point to the unused memory area.
@ -195,14 +159,14 @@ fail:
}
/* Run a zipl program */
static int zipl_run(struct scsi_blockptr *pte)
static int zipl_run(ScsiBlockPtr *pte)
{
struct component_header *header;
struct component_entry *entry;
ComponentHeader *header;
ComponentEntry *entry;
uint8_t tmp_sec[SECTOR_SIZE];
virtio_read(pte->blockno, tmp_sec);
header = (struct component_header *)tmp_sec;
header = (ComponentHeader *)tmp_sec;
if (!zipl_magic(tmp_sec)) {
goto fail;
@ -215,7 +179,7 @@ static int zipl_run(struct scsi_blockptr *pte)
dputs("start loading images\n");
/* Load image(s) into RAM */
entry = (struct component_entry *)(&header[1]);
entry = (ComponentEntry *)(&header[1]);
while (entry->component_type == ZIPL_COMP_ENTRY_LOAD) {
if (zipl_load_segment(entry) < 0) {
goto fail;
@ -244,11 +208,11 @@ fail:
int zipl_load(void)
{
struct mbr *mbr = (void *)sec;
ScsiMbr *mbr = (void *)sec;
uint8_t *ns, *ns_end;
int program_table_entries = 0;
int pte_len = sizeof(struct scsi_blockptr);
struct scsi_blockptr *prog_table_entry;
const int pte_len = sizeof(ScsiBlockPtr);
ScsiBlockPtr *prog_table_entry;
const char *error = "";
/* Grab the MBR */
@ -276,7 +240,7 @@ int zipl_load(void)
ns_end = sec + SECTOR_SIZE;
for (ns = (sec + pte_len); (ns + pte_len) < ns_end; ns++) {
prog_table_entry = (struct scsi_blockptr *)ns;
prog_table_entry = (ScsiBlockPtr *)ns;
if (!prog_table_entry->blockno) {
break;
}
@ -292,7 +256,7 @@ int zipl_load(void)
/* Run the default entry */
prog_table_entry = (struct scsi_blockptr *)(sec + pte_len);
prog_table_entry = (ScsiBlockPtr *)(sec + pte_len);
return zipl_run(prog_table_entry);

254
pc-bios/s390-ccw/bootmap.h Normal file
View File

@ -0,0 +1,254 @@
/*
* QEMU S390 bootmap interpreter -- declarations
*
* Copyright 2014 IBM Corp.
* Author(s): Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or (at
* your option) any later version. See the COPYING file in the top-level
* directory.
*/
#ifndef _PC_BIOS_S390_CCW_BOOTMAP_H
#define _PC_BIOS_S390_CCW_BOOTMAP_H
#include "s390-ccw.h"
#define FREE_SPACE_FILLER '\xAA'
typedef struct ScsiBlockPtr {
uint64_t blockno;
uint16_t size;
uint16_t blockct;
uint8_t reserved[4];
} __attribute__ ((packed)) ScsiBlockPtr;
typedef struct FbaBlockPtr {
uint32_t blockno;
uint16_t size;
uint16_t blockct;
} __attribute__ ((packed)) FbaBlockPtr;
typedef struct EckdBlockPtr {
uint16_t cylinder; /* cylinder/head/sector is an address of the block */
uint16_t head;
uint8_t sector;
uint16_t size;
uint8_t count; /* (size_in_blocks-1);
* it's 0 for TablePtr, ScriptPtr, and SectionPtr */
} __attribute__ ((packed)) EckdBlockPtr;
typedef struct ExtEckdBlockPtr {
EckdBlockPtr bptr;
uint8_t reserved[8];
} __attribute__ ((packed)) ExtEckdBlockPtr;
typedef union BootMapPointer {
ScsiBlockPtr scsi;
FbaBlockPtr fba;
EckdBlockPtr eckd;
ExtEckdBlockPtr xeckd;
} __attribute__ ((packed)) BootMapPointer;
typedef struct ComponentEntry {
ScsiBlockPtr data;
uint8_t pad[7];
uint8_t component_type;
uint64_t load_address;
} __attribute((packed)) ComponentEntry;
typedef struct ComponentHeader {
uint8_t magic[4]; /* == "zIPL" */
uint8_t type; /* == ZIPL_COMP_HEADER_* */
uint8_t reserved[27];
} __attribute((packed)) ComponentHeader;
typedef struct ScsiMbr {
uint8_t magic[4];
uint32_t version_id;
uint8_t reserved[8];
ScsiBlockPtr blockptr;
} __attribute__ ((packed)) ScsiMbr;
#define ZIPL_MAGIC "zIPL"
#define IPL1_MAGIC "\xc9\xd7\xd3\xf1" /* == "IPL1" in EBCDIC */
#define IPL2_MAGIC "\xc9\xd7\xd3\xf2" /* == "IPL2" in EBCDIC */
#define VOL1_MAGIC "\xe5\xd6\xd3\xf1" /* == "VOL1" in EBCDIC */
#define LNX1_MAGIC "\xd3\xd5\xe7\xf1" /* == "LNX1" in EBCDIC */
#define CMS1_MAGIC "\xc3\xd4\xe2\xf1" /* == "CMS1" in EBCDIC */
#define LDL1_VERSION '\x40' /* == ' ' in EBCDIC */
#define LDL2_VERSION '\xf2' /* == '2' in EBCDIC */
#define ZIPL_COMP_HEADER_IPL 0x00
#define ZIPL_COMP_HEADER_DUMP 0x01
#define ZIPL_COMP_ENTRY_LOAD 0x02
#define ZIPL_COMP_ENTRY_EXEC 0x01
typedef struct XEckdMbr {
uint8_t magic[4]; /* == "xIPL" */
uint8_t version;
uint8_t bp_type;
uint8_t dev_type; /* == DEV_TYPE_* */
#define DEV_TYPE_ECKD 0x00
#define DEV_TYPE_FBA 0x01
uint8_t flags;
BootMapPointer blockptr;
uint8_t reserved[8];
} __attribute__ ((packed)) XEckdMbr; /* see also BootInfo */
typedef struct BootMapScriptEntry {
BootMapPointer blkptr;
uint8_t pad[7];
uint8_t type; /* == BOOT_SCRIPT_* */
#define BOOT_SCRIPT_EXEC 0x01
#define BOOT_SCRIPT_LOAD 0x02
union {
uint64_t load_address;
uint64_t load_psw;
} address;
} __attribute__ ((packed)) BootMapScriptEntry;
typedef struct BootMapScriptHeader {
uint32_t magic;
uint8_t type;
#define BOOT_SCRIPT_HDR_IPL 0x00
uint8_t reserved[27];
} __attribute__ ((packed)) BootMapScriptHeader;
typedef struct BootMapScript {
BootMapScriptHeader header;
BootMapScriptEntry entry[0];
} __attribute__ ((packed)) BootMapScript;
/*
* These aren't real VTOCs, but referred to this way in some docs.
* They are "volume labels" actually.
*
* Some structures looks similar to described above, but left
* separate as there is no indication that they are the same.
* So, the value definitions are left separate too.
*/
typedef struct LDL_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */
char magic[4]; /* "LNX1", EBCDIC */
char volser[6]; /* volser, EBCDIC */
uint8_t reserved[69]; /* reserved, 0x40 */
uint8_t LDL_version; /* 0x40 or 0xF2 */
uint64_t formatted_blocks; /* if LDL_version >= 0xF2 */
} __attribute__ ((packed)) LDL_VTOC;
typedef struct format_date {
uint8_t YY;
uint8_t MM;
uint8_t DD;
uint8_t hh;
uint8_t mm;
uint8_t ss;
} __attribute__ ((packed)) format_date_t;
typedef struct CMS_VTOC { /* @ rec.3 cyl.0 trk.0 for ECKD */
/* @ blk.1 (zero based) for FBA */
char magic[4]; /* 'CMS1', EBCDIC */
char volser[6]; /* volser, EBCDIC */
uint16_t version; /* = 0 */
uint32_t block_size; /* = 512, 1024, 2048, or 4096 */
uint32_t disk_origin; /* = 4 or 5 */
uint32_t blocks; /* Number of usable cyls/blocks */
uint32_t formatted; /* Max number of fmtd cyls/blks */
uint32_t CMS_blocks; /* disk size in CMS blocks */
uint32_t CMS_used; /* Number of CMS blocks in use */
uint32_t FST_size; /* = 64, bytes */
uint32_t FST_per_CMS_blk; /* */
format_date_t format_date; /* YYMMDDhhmmss as 6 bytes */
uint8_t reserved1[2]; /* = 0 */
uint32_t offset; /* disk offset when reserved */
uint32_t next_hole; /* block nr */
uint32_t HBLK_hole_offset; /* >> HBLK data of next hole */
uint32_t alloc_map_usr_off; /* >> user part of Alloc map */
uint8_t reserved2[4]; /* = 0 */
char shared_seg_name[8]; /* */
} __attribute__ ((packed)) CMS_VTOC;
/* from zipl/include/boot.h */
typedef struct BootInfoBpIpl {
union {
ExtEckdBlockPtr eckd;
ScsiBlockPtr linr;
} bm_ptr;
uint8_t unused[16];
} __attribute__ ((packed)) BootInfoBpIpl;
typedef struct EckdDumpParam {
uint32_t start_blk;
uint32_t end_blk;
uint16_t blocksize;
uint8_t num_heads;
uint8_t bpt;
char reserved[4];
} __attribute((packed, may_alias)) EckdDumpParam;
typedef struct FbaDumpParam {
uint64_t start_blk;
uint64_t blockct;
} __attribute((packed)) FbaDumpParam;
typedef struct BootInfoBpDump {
union {
EckdDumpParam eckd;
FbaDumpParam fba;
} param;
uint8_t unused[16];
} __attribute__ ((packed)) BootInfoBpDump;
typedef struct BootInfo { /* @ 0x70, record #0 */
unsigned char magic[4]; /* = 'zIPL', ASCII */
uint8_t version; /* = 1 */
#define BOOT_INFO_VERSION 1
uint8_t bp_type; /* = 0 */
#define BOOT_INFO_BP_TYPE_IPL 0x00
#define BOOT_INFO_BP_TYPE_DUMP 0x01
uint8_t dev_type; /* = 0 */
#define BOOT_INFO_DEV_TYPE_ECKD 0x00
#define BOOT_INFO_DEV_TYPE_FBA 0x01
uint8_t flags; /* = 1 */
#ifdef __s390x__
#define BOOT_INFO_FLAGS_ARCH 0x01
#else
#define BOOT_INFO_FLAGS_ARCH 0x00
#endif
union {
BootInfoBpDump dump;
BootInfoBpIpl ipl;
} bp;
} __attribute__ ((packed)) BootInfo; /* see also XEckdMbr */
typedef struct Ipl1 {
unsigned char key[4]; /* == "IPL1" */
unsigned char data[24];
} __attribute__((packed)) Ipl1;
typedef struct Ipl2 {
unsigned char key[4]; /* == "IPL2" */
union {
unsigned char data[144];
struct {
unsigned char reserved1[92-4];
XEckdMbr mbr;
unsigned char reserved2[144-(92-4)-sizeof(XEckdMbr)];
} x;
} u;
} __attribute__((packed)) Ipl2;
typedef struct IplVolumeLabel {
unsigned char key[4]; /* == "VOL1" */
union {
unsigned char data[80];
struct {
unsigned char key[4]; /* == "VOL1" */
unsigned char volser[6];
unsigned char reserved[6];
} f;
};
} __attribute__((packed)) IplVolumeLabel;
#endif /* _PC_BIOS_S390_CCW_BOOTMAP_H */