Disintegrate asm/system.h for S390

Disintegrate asm/system.h for S390.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-s390@vger.kernel.org

1 files changed, 76 insertions, 0 deletions

diff --git a/arch/s390/include/asm/ctl_reg.h b/arch/s390/include/asm/ctl_reg.h
new file mode 100644
index 000000000000..ecde9417d669
--- /dev/null
+++ b/arch/s390/include/asm/ctl_reg.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright IBM Corp. 1999, 2009
+ *
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef __ASM_CTL_REG_H
+#define __ASM_CTL_REG_H
+
+#ifdef __s390x__
+
+#define __ctl_load(array, low, high) ({                         \
+        typedef struct { char _[sizeof(array)]; } addrtype;     \
+        asm volatile(                                           \
+                "       lctlg   %1,%2,%0\n"                     \
+                : : "Q" (*(addrtype *)(&array)),                \
+                    "i" (low), "i" (high));                     \
+        })
+
+#define __ctl_store(array, low, high) ({                        \
+        typedef struct { char _[sizeof(array)]; } addrtype;     \
+        asm volatile(                                           \
+                "       stctg   %1,%2,%0\n"                     \
+                : "=Q" (*(addrtype *)(&array))                  \
+                : "i" (low), "i" (high));                       \
+        })
+
+#else /* __s390x__ */
+
+#define __ctl_load(array, low, high) ({                         \
+        typedef struct { char _[sizeof(array)]; } addrtype;     \
+        asm volatile(                                           \
+                "       lctl    %1,%2,%0\n"                     \
+                : : "Q" (*(addrtype *)(&array)),                \
+                    "i" (low), "i" (high));                     \
+})
+
+#define __ctl_store(array, low, high) ({                        \
+        typedef struct { char _[sizeof(array)]; } addrtype;     \
+        asm volatile(                                           \
+                "       stctl   %1,%2,%0\n"                     \
+                : "=Q" (*(addrtype *)(&array))                  \
+                : "i" (low), "i" (high));                       \
+        })
+
+#endif /* __s390x__ */
+
+#define __ctl_set_bit(cr, bit) ({       \
+        unsigned long __dummy;          \
+        __ctl_store(__dummy, cr, cr);   \
+        __dummy |= 1UL << (bit);        \
+        __ctl_load(__dummy, cr, cr);    \
+})
+
+#define __ctl_clear_bit(cr, bit) ({     \
+        unsigned long __dummy;          \
+        __ctl_store(__dummy, cr, cr);   \
+        __dummy &= ~(1UL << (bit));     \
+        __ctl_load(__dummy, cr, cr);    \
+})
+
+#ifdef CONFIG_SMP
+
+extern void smp_ctl_set_bit(int cr, int bit);
+extern void smp_ctl_clear_bit(int cr, int bit);
+#define ctl_set_bit(cr, bit) smp_ctl_set_bit(cr, bit)
+#define ctl_clear_bit(cr, bit) smp_ctl_clear_bit(cr, bit)
+
+#else
+
+#define ctl_set_bit(cr, bit) __ctl_set_bit(cr, bit)
+#define ctl_clear_bit(cr, bit) __ctl_clear_bit(cr, bit)
+
+#endif /* CONFIG_SMP */
+
+#endif /* __ASM_CTL_REG_H */