126 lines
2.9 KiB
C
126 lines
2.9 KiB
C
/*
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* QEMU S390 IPL Block
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*
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* Copyright 2015 IBM Corp.
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* Author(s): Alexander Yarygin <yarygin@linux.vnet.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#ifndef IPLB_H
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#define IPLB_H
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#define LOADPARM_LEN 8
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struct IplBlockCcw {
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uint8_t reserved0[85];
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uint8_t ssid;
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uint16_t devno;
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uint8_t vm_flags;
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uint8_t reserved3[3];
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uint32_t vm_parm_len;
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uint8_t nss_name[8];
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uint8_t vm_parm[64];
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uint8_t reserved4[8];
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} __attribute__ ((packed));
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typedef struct IplBlockCcw IplBlockCcw;
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struct IplBlockFcp {
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uint8_t reserved1[305 - 1];
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uint8_t opt;
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uint8_t reserved2[3];
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uint16_t reserved3;
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uint16_t devno;
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uint8_t reserved4[4];
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uint64_t wwpn;
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uint64_t lun;
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uint32_t bootprog;
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uint8_t reserved5[12];
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uint64_t br_lba;
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uint32_t scp_data_len;
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uint8_t reserved6[260];
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uint8_t scp_data[];
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} __attribute__ ((packed));
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typedef struct IplBlockFcp IplBlockFcp;
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struct IplBlockQemuScsi {
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uint32_t lun;
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uint16_t target;
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uint16_t channel;
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uint8_t reserved0[77];
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uint8_t ssid;
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uint16_t devno;
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} __attribute__ ((packed));
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typedef struct IplBlockQemuScsi IplBlockQemuScsi;
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struct IplParameterBlock {
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uint32_t len;
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uint8_t reserved0[3];
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uint8_t version;
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uint32_t blk0_len;
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uint8_t pbt;
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uint8_t flags;
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uint16_t reserved01;
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uint8_t loadparm[LOADPARM_LEN];
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union {
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IplBlockCcw ccw;
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IplBlockFcp fcp;
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IplBlockQemuScsi scsi;
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};
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} __attribute__ ((packed));
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typedef struct IplParameterBlock IplParameterBlock;
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extern IplParameterBlock iplb __attribute__((__aligned__(PAGE_SIZE)));
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#define QIPL_ADDRESS 0xcc
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/* Boot Menu flags */
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#define QIPL_FLAG_BM_OPTS_CMD 0x80
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#define QIPL_FLAG_BM_OPTS_ZIPL 0x40
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/*
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* This definition must be kept in sync with the defininition
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* in hw/s390x/ipl.h
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*/
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struct QemuIplParameters {
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uint8_t qipl_flags;
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uint8_t reserved1[3];
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uint64_t netboot_start_addr;
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uint32_t boot_menu_timeout;
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uint8_t reserved2[12];
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} __attribute__ ((packed));
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typedef struct QemuIplParameters QemuIplParameters;
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extern QemuIplParameters qipl;
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#define S390_IPL_TYPE_FCP 0x00
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#define S390_IPL_TYPE_CCW 0x02
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#define S390_IPL_TYPE_QEMU_SCSI 0xff
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static inline bool manage_iplb(IplParameterBlock *iplb, bool store)
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{
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register unsigned long addr asm("0") = (unsigned long) iplb;
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register unsigned long rc asm("1") = 0;
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unsigned long subcode = store ? 6 : 5;
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asm volatile ("diag %0,%2,0x308\n"
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: "+d" (addr), "+d" (rc)
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: "d" (subcode)
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: "memory", "cc");
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return rc == 0x01;
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}
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static inline bool store_iplb(IplParameterBlock *iplb)
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{
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return manage_iplb(iplb, true);
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}
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static inline bool set_iplb(IplParameterBlock *iplb)
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{
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return manage_iplb(iplb, false);
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}
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#endif /* IPLB_H */
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