1 files changed, 228 insertions, 0 deletions

diff --git a/drivers/s390/cio/ioasm.h b/drivers/s390/cio/ioasm.h
new file mode 100644
index 000000000000..c874607d9a80
--- /dev/null
+++ b/drivers/s390/cio/ioasm.h
@@ -0,0 +1,228 @@
+#ifndef S390_CIO_IOASM_H
+#define S390_CIO_IOASM_H
+
+/*
+ * TPI info structure
+ */
+struct tpi_info {
+        __u32 reserved1  : 16;   /* reserved 0x00000001 */
+        __u32 irq        : 16;   /* aka. subchannel number */
+        __u32 intparm;           /* interruption parameter */
+        __u32 adapter_IO : 1;
+        __u32 reserved2  : 1;
+        __u32 isc        : 3;
+        __u32 reserved3  : 12;
+        __u32 int_type   : 3;
+        __u32 reserved4  : 12;
+} __attribute__ ((packed));
+
+
+/*
+ * Some S390 specific IO instructions as inline
+ */
+
+extern __inline__ int stsch(int irq, volatile struct schib *addr)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   stsch 0(%2)\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000), "a" (addr)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int msch(int irq, volatile struct schib *addr)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   msch  0(%2)\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000L), "a" (addr)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int msch_err(int irq, volatile struct schib *addr)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "    lhi  %0,%3\n"
+                "    lr   1,%1\n"
+                "    msch 0(%2)\n"
+                "0:  ipm  %0\n"
+                "    srl  %0,28\n"
+                "1:\n"
+#ifdef CONFIG_ARCH_S390X
+                ".section __ex_table,\"a\"\n"
+                "   .align 8\n"
+                "   .quad 0b,1b\n"
+                ".previous"
+#else
+                ".section __ex_table,\"a\"\n"
+                "   .align 4\n"
+                "   .long 0b,1b\n"
+                ".previous"
+#endif
+                : "=&d" (ccode)
+                : "d" (irq | 0x10000L), "a" (addr), "K" (-EIO)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int tsch(int irq, volatile struct irb *addr)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   tsch  0(%2)\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000L), "a" (addr)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int tpi( volatile struct tpi_info *addr)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   tpi   0(%1)\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "a" (addr)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int ssch(int irq, volatile struct orb *addr)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   ssch  0(%2)\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000L), "a" (addr)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int rsch(int irq)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   rsch\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000L)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int csch(int irq)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   csch\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000L)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int hsch(int irq)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   hsch\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000L)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int xsch(int irq)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   .insn rre,0xb2760000,%1,0\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (irq | 0x10000L)
+                : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int chsc(void *chsc_area)
+{
+        int cc;
+
+        __asm__ __volatile__ (
+                ".insn  rre,0xb25f0000,%1,0     \n\t"
+                "ipm    %0      \n\t"
+                "srl    %0,28   \n\t"
+                : "=d" (cc)
+                : "d" (chsc_area)
+                : "cc" );
+
+        return cc;
+}
+
+extern __inline__ int iac( void)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   iac   1\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode) : : "cc", "1" );
+        return ccode;
+}
+
+extern __inline__ int rchp(int chpid)
+{
+        int ccode;
+
+        __asm__ __volatile__(
+                "   lr    1,%1\n"
+                "   rchp\n"
+                "   ipm   %0\n"
+                "   srl   %0,28"
+                : "=d" (ccode)
+                : "d" (chpid)
+                : "cc", "1" );
+        return ccode;
+}
+
+#endif