loader/loader.h

   1 #ifndef __LOADER_H
   2 #define __LOADER_H
   3
   4 /*
   5  * "Config" values
   6  */
   7 #define TEMP_BASE       ((unsigned char*) 0x400000) /* 4MB */
   8 #define SYMTAB_BASE     ((unsigned char*) 8192) /* 8kB */
   9
  10 /* 3390 with 0 key length, and 4096 data length */
  11 #define RECORDS_PER_CYL         (15*12)
  12 #define RECORDS_PER_TRACK       12
  13
  14 /* the nucleus fn ft (in EBCDIC) => HVF ELF */
  15 #define CP_FN   "\xC8\xE5\xC6\x40\x40\x40\x40\x40"
  16 #define CP_FT   "\xC5\xD3\xC6\x40\x40\x40\x40\x40"
  17
  18 /*
  19  * string manipulation
  20  */
  21 #define memcpy(d,s,l)   __builtin_memcpy((d), (s), (l))
  22 #define memcmp(d,s,l)   __builtin_memcmp((d), (s), (l))
  23 #define memset(s,c,n)   __builtin_memset((s),(c),(n))
  24
  25 /*
  26  * I/O related structs, macros & variables
  27  */
  28 struct ccw {
  29         u8 cmd;                 /* Command code */
  30         u8 flags;               /* Flags */
  31         u16 count;              /* Count */
  32         u32 addr;               /* Data Address */
  33 } __attribute__((packed,aligned(8)));
  34
  35 #define CCW_FLAG_CD             0x80    /* Chain-Data */
  36 #define CCW_FLAG_CC             0x40    /* Chain-Command */
  37 #define CCW_FLAG_SLI            0x20    /* Suppress-Length-Indication */
  38 #define CCW_FLAG_SKP            0x10    /* Skip */
  39 #define CCW_FLAG_PCI            0x08    /* Program-Controlled-Interruption */
  40 #define CCW_FLAG_IDA            0x04    /* Indirect-Data-Address */
  41 #define CCW_FLAG_S              0x02    /* Suspend */
  42 #define CCW_FLAG_MIDA           0x01    /* Modified-Indirect-Data-Address */
  43
  44 struct orb {
  45         /* word 0 */
  46         u32 param;              /* Interruption Parameter */
  47
  48         /* word 1 */
  49         u8 key:4,               /* Subchannel Key */
  50            s:1,                 /* Suspend */
  51            c:1,                 /* Streaming-Mode Control */
  52            m:1,                 /* Modification Control */
  53            y:1;                 /* Synchronization Control */
  54         u8 f:1,                 /* Format Control */
  55            p:1,                 /* Prefetch Control */
  56            i:1,                 /* Initial-Status-Interruption Control */
  57            a:1,                 /* Address-Limit-Checking control */
  58            u:1,                 /* Suppress-Suspend-Interruption Control */
  59            __zero1:1,
  60            h:1,                 /* Format-2-IDAW Control */
  61            t:1;                 /* 2K-IDAW Control */
  62         u8 lpm;                 /* Logical-Path Mask */
  63         u8 l:1,                 /* Incorrect-Length-Suppression Mode */
  64            d:1,                 /* Modified-CCW-Indirect-Data-Addressing Control */
  65            __zero2:5,
  66            x:1;                 /* ORB-Extension Control */
  67
  68         /* word 2 */
  69         u32 addr;               /* Channel-Program Address */
  70
  71         /* word 3 */
  72         u8 css_prio;            /* Channel-Subsystem Priority */
  73         u8 __reserved1;
  74         u8 cu_prio;             /* Control-Unit Priority */
  75         u8 __reserved2;
  76
  77         /* word 4 - 7 */
  78         u32 __reserved3;
  79         u32 __reserved4;
  80         u32 __reserved5;
  81         u32 __reserved6;
  82 } __attribute__((packed,aligned(4)));
  83
  84 #define ADDR31(x)       ((u32) (u64) (x))
  85
  86 extern void __do_io();
  87 extern void PGMHANDLER();
  88
  89 extern void load_nucleus(void);
  90
  91 extern struct orb ORB;
  92
  93 /*
  94  * EDF related structs & macros
  95  */
  96 #define EDF_LABEL_BLOCK_NO              3
  97 #define EDF_SUPPORTED_BLOCK_SIZE        4096
  98
  99 struct ADT {
 100         u32     IDENT;       /* VOL START / LABEL IDENTIFIER */
 101 #define __ADTIDENT 0xC3D4E2F1   /* 'CMS1' in EBCDIC */
 102         u8      ID[6];       /* VOL START / VOL IDENTIFIER */
 103         u8      VER[2];      /* VERSION LEVEL */
 104         u32     DBSIZ;       /* DISK BLOCK SIZE */
 105         u32     DOP;         /* DISK ORIGIN POINTER */
 106         u32     CYL;         /* NUM OF FORMATTED CYL ON DISK */
 107         u32     MCYL;        /* MAX NUM FORMATTED CYL ON DISK */
 108         u32     NUM;         /* Number of Blocks on disk */
 109         u32     USED;        /* Number of Blocks used */
 110         u32     FSTSZ;       /* SIZE OF FST */
 111         u32     NFST;        /* NUMBER OF FST'S PER BLOCK */
 112         u8      DCRED[6];    /* DISK CREATION DATE (YYMMDDHHMMSS) */
 113         u8      FLGL;        /* LABEL FLAG BYTE (ADTFLGL) */
 114 #define ADTCNTRY        0x01    /* Century for disk creation date (0=19, 1=20),
 115                                  * corresponds to ADTDCRED. */
 116         u8      reserved[1];
 117         u32     OFFST;       /* DISK OFFSET WHEN RESERVED */
 118         u32     AMNB;        /* ALLOC MAP BLOCK WITH NEXT HOLE */
 119         u32     AMND;        /* DISP INTO HBLK DATA OF NEXT HOLE */
 120         u32     AMUP;        /* DISP INTO USER PART OF ALLOC MAP */
 121         u32     OFCNT;       /* Count of SFS open files for this ADT */
 122         u8      SFNAM[8];    /* NAME OF SHARED SEGMENT */
 123 };
 124
 125 struct FST {
 126         u8    FNAME[8];       /* filename */
 127         u8    FTYPE[8];       /* filetype */
 128         u8    DATEW[2];       /* DATE LAST WRITTEN - MMDD */
 129         u8    TIMEW[2];       /* TIME LAST WRITTEN - HHMM */
 130         u16   WRPNT;          /* WRITE POINTER - ITEM NUMBER */
 131         u16   RDPNT;          /* READ POINTER - ITEM NUMBER */
 132         u8    FMODE[2];       /* FILE MODE - LETTER AND NUMBER */
 133         u16   RECCT;          /* NUMBER OF LOGICAL RECORDS */
 134         u16   FCLPT;          /* FIRST CHAIN LINK POINTER */
 135         u8    RECFM;          /* F*1 - RECORD FORMAT - F OR V */
 136 #define FSTDFIX        0xC6 /* Fixed record format (EBCDIC 'F') */
 137 #define FSTDVAR        0xE5 /* Variable record format (EBCDIC 'V') */
 138         u8    FLAGS;          /* F*2 - FST FLAG BYTE */
 139 #define FSTRWDSK       0x80 /* READ/WRITE DISK */
 140 #define FSTRODSK       0x00 /* READ/ONLY DISK */
 141 #define FSTDSFS        0x10 /* Shared File FST */
 142 #define FSTXRDSK       0x40 /* EXTENSION OF R/O DISK */
 143 #define FSTXWDSK       0xC0 /* EXTENSION OF R/W DISK */
 144 #define FSTEPL         0x20 /* EXTENDED PLIST */
 145 #define FSTDIA         0x40 /* ITEM AVAILABLE */
 146 #define FSTDRA         0x01 /* PREVIOUS RECORD NULL */
 147 #define FSTCNTRY       0x08 /* Century for date last written (0=19, 1=20),\\
 148                                corresponds to FSTYEARW, FSTADATI. */
 149 #define FSTACTRD       0x04 /* ACTIVE FOR READING */
 150 #define FSTACTWR       0x02 /* ACTIVE FOR WRITING */
 151 #define FSTACTPT       0x01 /* ACTIVE FROM A POINT */
 152 #define FSTFILEA       0x07 /* THE FILE IS ACTIVE */
 153         u32   LRECL;          /* LOGICAL RECORD LENGTH */
 154         u16   BLKCT;          /* NUMBER OF 800 BYTE BLOCKS */
 155         u16   YEARW;          /* YEAR LAST WRITTEN */
 156         u32   FOP;            /* ALT. FILE ORIGIN POINTER */
 157         u32   ADBC;           /* ALT. NUMBER OF DATA BLOCKS */
 158         u32   AIC;            /* ALT. ITEM COUNT */
 159         u8    NLVL;           /* NUMBER OF POINTER BLOCK LEVELS */
 160         u8    PTRSZ;          /* LENGTH OF A POINTER ELEMENT */
 161         u8    ADATI[6];       /* ALT. DATE/TIME(YY MM DD HH MM SS) */
 162         u8    REALM;          /* Real filemode */
 163         u8    FLAG2;          /* F*3 - FST FLAG BYTE 2 FSTFLAG2 */
 164 #define FSTPIPEU       0x10 /* Reserved for CMS PIPELINES usage */
 165         u8    reserved[2];
 166 };
 167
 168 #endif