diff options
Diffstat (limited to 'drivers/s390/cio/ioasm.c')
| -rw-r--r-- | drivers/s390/cio/ioasm.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/drivers/s390/cio/ioasm.c b/drivers/s390/cio/ioasm.c new file mode 100644 index 000000000000..98984818618f --- /dev/null +++ b/drivers/s390/cio/ioasm.c @@ -0,0 +1,224 @@ +/* + * Channel subsystem I/O instructions. + */ + +#include <linux/export.h> + +#include <asm/chpid.h> +#include <asm/schid.h> +#include <asm/crw.h> + +#include "ioasm.h" +#include "orb.h" +#include "cio.h" + +int stsch(struct subchannel_id schid, struct schib *addr) +{ + register struct subchannel_id reg1 asm ("1") = schid; + int ccode = -EIO; + + asm volatile( + " stsch 0(%3)\n" + "0: ipm %0\n" + " srl %0,28\n" + "1:\n" + EX_TABLE(0b, 1b) + : "+d" (ccode), "=m" (*addr) + : "d" (reg1), "a" (addr) + : "cc"); + trace_s390_cio_stsch(schid, addr, ccode); + + return ccode; +} +EXPORT_SYMBOL(stsch); + +int msch(struct subchannel_id schid, struct schib *addr) +{ + register struct subchannel_id reg1 asm ("1") = schid; + int ccode = -EIO; + + asm volatile( + " msch 0(%2)\n" + "0: ipm %0\n" + " srl %0,28\n" + "1:\n" + EX_TABLE(0b, 1b) + : "+d" (ccode) + : "d" (reg1), "a" (addr), "m" (*addr) + : "cc"); + trace_s390_cio_msch(schid, addr, ccode); + + return ccode; +} + +int tsch(struct subchannel_id schid, struct irb *addr) +{ + register struct subchannel_id reg1 asm ("1") = schid; + int ccode; + + asm volatile( + " tsch 0(%3)\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode), "=m" (*addr) + : "d" (reg1), "a" (addr) + : "cc"); + trace_s390_cio_tsch(schid, addr, ccode); + + return ccode; +} + +int ssch(struct subchannel_id schid, union orb *addr) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode = -EIO; + + asm volatile( + " ssch 0(%2)\n" + "0: ipm %0\n" + " srl %0,28\n" + "1:\n" + EX_TABLE(0b, 1b) + : "+d" (ccode) + : "d" (reg1), "a" (addr), "m" (*addr) + : "cc", "memory"); + trace_s390_cio_ssch(schid, addr, ccode); + + return ccode; +} +EXPORT_SYMBOL(ssch); + +int csch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " csch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) + : "d" (reg1) + : "cc"); + trace_s390_cio_csch(schid, ccode); + + return ccode; +} +EXPORT_SYMBOL(csch); + +int tpi(struct tpi_info *addr) +{ + int ccode; + + asm volatile( + " tpi 0(%2)\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode), "=m" (*addr) + : "a" (addr) + : "cc"); + trace_s390_cio_tpi(addr, ccode); + + return ccode; +} + +int chsc(void *chsc_area) +{ + typedef struct { char _[4096]; } addr_type; + int cc; + + asm volatile( + " .insn rre,0xb25f0000,%2,0\n" + " ipm %0\n" + " srl %0,28\n" + : "=d" (cc), "=m" (*(addr_type *) chsc_area) + : "d" (chsc_area), "m" (*(addr_type *) chsc_area) + : "cc"); + trace_s390_cio_chsc(chsc_area, cc); + + return cc; +} +EXPORT_SYMBOL(chsc); + +int rchp(struct chp_id chpid) +{ + register struct chp_id reg1 asm ("1") = chpid; + int ccode; + + asm volatile( + " lr 1,%1\n" + " rchp\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) : "d" (reg1) : "cc"); + trace_s390_cio_rchp(chpid, ccode); + + return ccode; +} + +int rsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " rsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) + : "d" (reg1) + : "cc", "memory"); + trace_s390_cio_rsch(schid, ccode); + + return ccode; +} + +int hsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " hsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) + : "d" (reg1) + : "cc"); + trace_s390_cio_hsch(schid, ccode); + + return ccode; +} + +int xsch(struct subchannel_id schid) +{ + register struct subchannel_id reg1 asm("1") = schid; + int ccode; + + asm volatile( + " xsch\n" + " ipm %0\n" + " srl %0,28" + : "=d" (ccode) + : "d" (reg1) + : "cc"); + trace_s390_cio_xsch(schid, ccode); + + return ccode; +} + +int stcrw(struct crw *crw) +{ + int ccode; + + asm volatile( + " stcrw 0(%2)\n" + " ipm %0\n" + " srl %0,28\n" + : "=d" (ccode), "=m" (*crw) + : "a" (crw) + : "cc"); + trace_s390_cio_stcrw(crw, ccode); + + return ccode; +} |