94c12cc7d1
Major cleanup of all s390 inline assemblies. They now have a common coding style. Quite a few have been shortened, mainly by using register asm variables. Use of the EX_TABLE macro helps as well. The atomic ops, bit ops and locking inlines new use the Q-constraint if a newer gcc is used. That results in slightly better code. Thanks to Christian Borntraeger for proof reading the changes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
207 lines
3.9 KiB
C
207 lines
3.9 KiB
C
#ifndef S390_CIO_IOASM_H
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#define S390_CIO_IOASM_H
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#include "schid.h"
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/*
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* TPI info structure
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*/
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struct tpi_info {
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struct subchannel_id schid;
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__u32 intparm; /* interruption parameter */
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__u32 adapter_IO : 1;
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__u32 reserved2 : 1;
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__u32 isc : 3;
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__u32 reserved3 : 12;
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__u32 int_type : 3;
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__u32 reserved4 : 12;
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} __attribute__ ((packed));
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/*
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* Some S390 specific IO instructions as inline
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*/
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static inline int stsch(struct subchannel_id schid,
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volatile struct schib *addr)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" stsch 0(%2)\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc");
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return ccode;
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}
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static inline int stsch_err(struct subchannel_id schid,
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volatile struct schib *addr)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode = -EIO;
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asm volatile(
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" stsch 0(%2)\n"
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"0: ipm %0\n"
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" srl %0,28\n"
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"1:\n"
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EX_TABLE(0b,1b)
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: "+d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc");
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return ccode;
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}
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static inline int msch(struct subchannel_id schid,
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volatile struct schib *addr)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" msch 0(%2)\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc");
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return ccode;
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}
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static inline int msch_err(struct subchannel_id schid,
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volatile struct schib *addr)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode = -EIO;
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asm volatile(
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" msch 0(%2)\n"
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"0: ipm %0\n"
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" srl %0,28\n"
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"1:\n"
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EX_TABLE(0b,1b)
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: "+d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc");
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return ccode;
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}
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static inline int tsch(struct subchannel_id schid,
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volatile struct irb *addr)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" tsch 0(%2)\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc");
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return ccode;
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}
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static inline int tpi( volatile struct tpi_info *addr)
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{
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int ccode;
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asm volatile(
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" tpi 0(%1)\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "a" (addr), "m" (*addr) : "cc");
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return ccode;
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}
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static inline int ssch(struct subchannel_id schid,
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volatile struct orb *addr)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" ssch 0(%2)\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1), "a" (addr), "m" (*addr) : "cc");
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return ccode;
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}
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static inline int rsch(struct subchannel_id schid)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" rsch\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1) : "cc");
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return ccode;
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}
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static inline int csch(struct subchannel_id schid)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" csch\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1) : "cc");
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return ccode;
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}
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static inline int hsch(struct subchannel_id schid)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" hsch\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1) : "cc");
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return ccode;
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}
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static inline int xsch(struct subchannel_id schid)
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{
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register struct subchannel_id reg1 asm ("1") = schid;
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int ccode;
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asm volatile(
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" .insn rre,0xb2760000,%1,0\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1) : "cc");
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return ccode;
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}
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static inline int chsc(void *chsc_area)
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{
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typedef struct { char _[4096]; } addr_type;
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int cc;
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asm volatile(
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" .insn rre,0xb25f0000,%2,0\n"
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" ipm %0\n"
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" srl %0,28\n"
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: "=d" (cc), "=m" (*(addr_type *) chsc_area)
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: "d" (chsc_area), "m" (*(addr_type *) chsc_area)
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: "cc");
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return cc;
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}
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static inline int rchp(int chpid)
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{
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register unsigned int reg1 asm ("1") = chpid;
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int ccode;
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asm volatile(
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" lr 1,%1\n"
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" rchp\n"
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" ipm %0\n"
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" srl %0,28"
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: "=d" (ccode) : "d" (reg1) : "cc");
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return ccode;
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}
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#endif
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