diff options
Diffstat (limited to 'pc-bios/s390-ccw/bootmap.h')
| -rw-r--r-- | pc-bios/s390-ccw/bootmap.h | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h new file mode 100644 index 00000000..ab132e35 --- /dev/null +++ b/pc-bios/s390-ccw/bootmap.h @@ -0,0 +1,344 @@ +/* + * 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" +#include "virtio.h" + +typedef uint64_t block_number_t; +#define NULL_BLOCK_NR 0xffffffffffffffffULL + +#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; + +typedef enum { + ECKD_NO_IPL, + ECKD_CMS, + ECKD_LDL, + ECKD_LDL_UNLABELED, +} ECKD_IPL_mode_t; + +/* utility code below */ + +static inline void IPL_assert(bool term, const char *message) +{ + if (!term) { + sclp_print("\n! "); + sclp_print(message); + virtio_panic(" !\n"); /* no return */ + } +} + +static const unsigned char ebc2asc[256] = + /* 0123456789abcdef0123456789abcdef */ + "................................" /* 1F */ + "................................" /* 3F */ + " ...........<(+|&.........!$*);." /* 5F first.chr.here.is.real.space */ + "-/.........,%_>?.........`:#@'=\""/* 7F */ + ".abcdefghi.......jklmnopqr......" /* 9F */ + "..stuvwxyz......................" /* BF */ + ".ABCDEFGHI.......JKLMNOPQR......" /* DF */ + "..STUVWXYZ......0123456789......";/* FF */ + +static inline void ebcdic_to_ascii(const char *src, + char *dst, + unsigned int size) +{ + unsigned int i; + for (i = 0; i < size; i++) { + unsigned c = src[i]; + dst[i] = ebc2asc[c]; + } +} + +static inline void print_volser(const void *volser) +{ + char ascii[8]; + + ebcdic_to_ascii((char *)volser, ascii, 6); + ascii[6] = '\0'; + sclp_print("VOLSER=["); + sclp_print(ascii); + sclp_print("]\n"); +} + +static inline bool unused_space(const void *p, size_t size) +{ + size_t i; + const unsigned char *m = p; + + for (i = 0; i < size; i++) { + if (m[i] != FREE_SPACE_FILLER) { + return false; + } + } + return true; +} + +static inline bool is_null_block_number(block_number_t x) +{ + return x == NULL_BLOCK_NR; +} + +static inline void read_block(block_number_t blockno, + void *buffer, + const char *errmsg) +{ + IPL_assert(virtio_read(blockno, buffer) == 0, errmsg); +} + +static inline bool block_size_ok(uint32_t block_size) +{ + return block_size == virtio_get_block_size(); +} + +static inline bool magic_match(const void *data, const void *magic) +{ + return *((uint32_t *)data) == *((uint32_t *)magic); +} + +#endif /* _PC_BIOS_S390_CCW_BOOTMAP_H */ |