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/*
 * s390 (re)ipl support
 *
 * Copyright IBM Corp. 2007
 */

#ifndef _ASM_S390_IPL_H
#define _ASM_S390_IPL_H

#include <asm/types.h>
#include <asm/cio.h>
#include <asm/setup.h>

#define IPL_PARMBLOCK_ORIGIN    0x2000

#define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
                  sizeof(struct ipl_block_fcp))

#define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 8)

#define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
                  sizeof(struct ipl_block_ccw))

#define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 8)

#define IPL_MAX_SUPPORTED_VERSION (0)

#define IPL_PARMBLOCK_START    ((struct ipl_parameter_block *) \
                 IPL_PARMBLOCK_ORIGIN)
#define IPL_PARMBLOCK_SIZE    (IPL_PARMBLOCK_START->hdr.len)

struct ipl_list_hdr {
    u32 len;
    u8  reserved1[3];
    u8  version;
    u32 blk0_len;
    u8  pbt;
    u8  flags;
    u16 reserved2;
} __attribute__((packed));

struct ipl_block_fcp {
    u8  reserved1[313-1];
    u8  opt;
    u8  reserved2[3];
    u16 reserved3;
    u16 devno;
    u8  reserved4[4];
    u64 wwpn;
    u64 lun;
    u32 bootprog;
    u8  reserved5[12];
    u64 br_lba;
    u32 scp_data_len;
    u8  reserved6[260];
    u8  scp_data[];
} __attribute__((packed));

#define DIAG308_VMPARM_SIZE    64
#define DIAG308_SCPDATA_SIZE    (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
                 offsetof(struct ipl_block_fcp, scp_data)))

struct ipl_block_ccw {
    u8  load_parm[8];
    u8  reserved1[84];
    u8  reserved2[2];
    u16 devno;
    u8  vm_flags;
    u8  reserved3[3];
    u32 vm_parm_len;
    u8  nss_name[8];
    u8  vm_parm[DIAG308_VMPARM_SIZE];
    u8  reserved4[8];
} __attribute__((packed));

struct ipl_parameter_block {
    struct ipl_list_hdr hdr;
    union {
        struct ipl_block_fcp fcp;
        struct ipl_block_ccw ccw;
    } ipl_info;
} __attribute__((packed,aligned(4096)));

/*
 * IPL validity flags
 */
extern u32 ipl_flags;
extern u32 dump_prefix_page;
extern unsigned int zfcpdump_prefix_array[];

extern void do_reipl(void);
extern void do_halt(void);
extern void do_poff(void);
extern void ipl_save_parameters(void);
extern void ipl_update_parameters(void);
extern size_t append_ipl_vmparm(char *, size_t);
extern size_t append_ipl_scpdata(char *, size_t);

enum {
    IPL_DEVNO_VALID        = 1,
    IPL_PARMBLOCK_VALID    = 2,
    IPL_NSS_VALID        = 4,
};

enum ipl_type {
    IPL_TYPE_UNKNOWN    = 1,
    IPL_TYPE_CCW        = 2,
    IPL_TYPE_FCP        = 4,
    IPL_TYPE_FCP_DUMP    = 8,
    IPL_TYPE_NSS        = 16,
};

struct ipl_info
{
    enum ipl_type type;
    union {
        struct {
            struct ccw_dev_id dev_id;
        } ccw;
        struct {
            struct ccw_dev_id dev_id;
            u64 wwpn;
            u64 lun;
        } fcp;
        struct {
            char name[NSS_NAME_SIZE + 1];
        } nss;
    } data;
};

extern struct ipl_info ipl_info;
extern void setup_ipl(void);

/*
 * DIAG 308 support
 */
enum diag308_subcode  {
    DIAG308_REL_HSA    = 2,
    DIAG308_IPL    = 3,
    DIAG308_DUMP    = 4,
    DIAG308_SET    = 5,
    DIAG308_STORE    = 6,
};

enum diag308_ipl_type {
    DIAG308_IPL_TYPE_FCP    = 0,
    DIAG308_IPL_TYPE_CCW    = 2,
};

enum diag308_opt {
    DIAG308_IPL_OPT_IPL    = 0x10,
    DIAG308_IPL_OPT_DUMP    = 0x20,
};

enum diag308_flags {
    DIAG308_FLAGS_LP_VALID    = 0x80,
};

enum diag308_vm_flags {
    DIAG308_VM_FLAGS_NSS_VALID    = 0x80,
    DIAG308_VM_FLAGS_VP_VALID    = 0x40,
};

enum diag308_rc {
    DIAG308_RC_OK        = 0x0001,
    DIAG308_RC_NOCONFIG    = 0x0102,
};

extern int diag308(unsigned long subcode, void *addr);

#endif /* _ASM_S390_IPL_H */
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