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qemu-linux-user
0168-pc-bios-s390-ccw-cleanup-and-enhanc.patch
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File 0168-pc-bios-s390-ccw-cleanup-and-enhanc.patch of Package qemu-linux-user
From edd0adf66ea6c4f1dd2e6a4a1fc1115e9f971027 Mon Sep 17 00:00:00 2001 From: "Eugene (jno) Dvurechenski" <jno@linux.vnet.ibm.com> Date: Mon, 19 May 2014 20:08:54 +0200 Subject: [PATCH] pc-bios/s390-ccw: cleanup and enhance bootmap defintions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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> (cherry picked from commit 26f2bbd6b1c6ef6eb3f84a2ddb0be92f4d93049a) Signed-off-by: Andreas Färber <afaerber@suse.de> --- pc-bios/s390-ccw/bootmap.c | 66 +++--------- pc-bios/s390-ccw/bootmap.h | 254 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 269 insertions(+), 51 deletions(-) create mode 100644 pc-bios/s390-ccw/bootmap.h diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index 753c288..c216030 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -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); diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h new file mode 100644 index 0000000..59267b0 --- /dev/null +++ b/pc-bios/s390-ccw/bootmap.h @@ -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 */
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