release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/s390/cio/ioasm.h

   1 #ifndef S390_CIO_IOASM_H
   2 #define S390_CIO_IOASM_H
   3
   4 #include <asm/chpid.h>
   5 #include <asm/schid.h>
   6
   7 /*
   8  * TPI info structure
   9  */
  10 struct tpi_info {
  11         struct subchannel_id schid;
  12         __u32 intparm;           /* interruption parameter */
  13         __u32 adapter_IO : 1;
  14         __u32 reserved2  : 1;
  15         __u32 isc        : 3;
  16         __u32 reserved3  : 12;
  17         __u32 int_type   : 3;
  18         __u32 reserved4  : 12;
  19 } __attribute__ ((packed));
  20
  21
  22 /*
  23  * Some S390 specific IO instructions as inline
  24  */
  25
  26 static inline int stsch_err(struct subchannel_id schid, struct schib *addr)
  27 {
  28         register struct subchannel_id reg1 asm ("1") = schid;
  29         int ccode = -EIO;
  30
  31         asm volatile(
  32                 "       stsch   0(%3)\n"
  33                 "0:     ipm     %0\n"
  34                 "       srl     %0,28\n"
  35                 "1:\n"
  36                 EX_TABLE(0b,1b)
  37                 : "+d" (ccode), "=m" (*addr)
  38                 : "d" (reg1), "a" (addr)
  39                 : "cc");
  40         return ccode;
  41 }
  42
  43 static inline int msch(struct subchannel_id schid, struct schib *addr)
  44 {
  45         register struct subchannel_id reg1 asm ("1") = schid;
  46         int ccode;
  47
  48         asm volatile(
  49                 "       msch    0(%2)\n"
  50                 "       ipm     %0\n"
  51                 "       srl     %0,28"
  52                 : "=d" (ccode)
  53                 : "d" (reg1), "a" (addr), "m" (*addr)
  54                 : "cc");
  55         return ccode;
  56 }
  57
  58 static inline int msch_err(struct subchannel_id schid, struct schib *addr)
  59 {
  60         register struct subchannel_id reg1 asm ("1") = schid;
  61         int ccode = -EIO;
  62
  63         asm volatile(
  64                 "       msch    0(%2)\n"
  65                 "0:     ipm     %0\n"
  66                 "       srl     %0,28\n"
  67                 "1:\n"
  68                 EX_TABLE(0b,1b)
  69                 : "+d" (ccode)
  70                 : "d" (reg1), "a" (addr), "m" (*addr)
  71                 : "cc");
  72         return ccode;
  73 }
  74
  75 static inline int tsch(struct subchannel_id schid, struct irb *addr)
  76 {
  77         register struct subchannel_id reg1 asm ("1") = schid;
  78         int ccode;
  79
  80         asm volatile(
  81                 "       tsch    0(%3)\n"
  82                 "       ipm     %0\n"
  83                 "       srl     %0,28"
  84                 : "=d" (ccode), "=m" (*addr)
  85                 : "d" (reg1), "a" (addr)
  86                 : "cc");
  87         return ccode;
  88 }
  89
  90 static inline int tpi(struct tpi_info *addr)
  91 {
  92         int ccode;
  93
  94         asm volatile(
  95                 "       tpi     0(%2)\n"
  96                 "       ipm     %0\n"
  97                 "       srl     %0,28"
  98                 : "=d" (ccode), "=m" (*addr)
  99                 : "a" (addr)
 100                 : "cc");
 101         return ccode;
 102 }
 103
 104 static inline int chsc(void *chsc_area)
 105 {
 106         typedef struct { char _[4096]; } addr_type;
 107         int cc;
 108
 109         asm volatile(
 110                 "       .insn   rre,0xb25f0000,%2,0\n"
 111                 "       ipm     %0\n"
 112                 "       srl     %0,28\n"
 113                 : "=d" (cc), "=m" (*(addr_type *) chsc_area)
 114                 : "d" (chsc_area), "m" (*(addr_type *) chsc_area)
 115                 : "cc");
 116         return cc;
 117 }
 118
 119 static inline int rchp(struct chp_id chpid)
 120 {
 121         register struct chp_id reg1 asm ("1") = chpid;
 122         int ccode;
 123
 124         asm volatile(
 125                 "       lr      1,%1\n"
 126                 "       rchp\n"
 127                 "       ipm     %0\n"
 128                 "       srl     %0,28"
 129                 : "=d" (ccode) : "d" (reg1) : "cc");
 130         return ccode;
 131 }
 132
 133 #endif