1 files changed, 102 insertions, 0 deletions

diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c
new file mode 100644
index 000000000000..c032d11da8a1
--- /dev/null
+++ b/arch/s390/kernel/diag.c
@@ -0,0 +1,102 @@
+/*
+ * Implementation of s390 diagnose codes
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Michael Holzheu <holzheu@de.ibm.com>
+ */
+
+#include <linux/module.h>
+#include <asm/diag.h>
+
+/*
+ * Diagnose 10: Release pages
+ */
+void diag10(unsigned long addr)
+{
+        if (addr >= 0x7ff00000)
+                return;
+        asm volatile(
+#ifdef CONFIG_64BIT
+                "       sam31\n"
+                "       diag    %0,%0,0x10\n"
+                "0:     sam64\n"
+#else
+                "       diag    %0,%0,0x10\n"
+                "0:\n"
+#endif
+                EX_TABLE(0b, 0b)
+                : : "a" (addr));
+}
+EXPORT_SYMBOL(diag10);
+
+/*
+ * Diagnose 14: Input spool file manipulation
+ */
+int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
+{
+        register unsigned long _ry1 asm("2") = ry1;
+        register unsigned long _ry2 asm("3") = subcode;
+        int rc = 0;
+
+        asm volatile(
+#ifdef CONFIG_64BIT
+                "   sam31\n"
+                "   diag    %2,2,0x14\n"
+                "   sam64\n"
+#else
+                "   diag    %2,2,0x14\n"
+#endif
+                "   ipm     %0\n"
+                "   srl     %0,28\n"
+                : "=d" (rc), "+d" (_ry2)
+                : "d" (rx), "d" (_ry1)
+                : "cc");
+
+        return rc;
+}
+EXPORT_SYMBOL(diag14);
+
+/*
+ * Diagnose 210: Get information about a virtual device
+ */
+int diag210(struct diag210 *addr)
+{
+        /*
+         * diag 210 needs its data below the 2GB border, so we
+         * use a static data area to be sure
+         */
+        static struct diag210 diag210_tmp;
+        static DEFINE_SPINLOCK(diag210_lock);
+        unsigned long flags;
+        int ccode;
+
+        spin_lock_irqsave(&diag210_lock, flags);
+        diag210_tmp = *addr;
+
+#ifdef CONFIG_64BIT
+        asm volatile(
+                "       lhi     %0,-1\n"
+                "       sam31\n"
+                "       diag    %1,0,0x210\n"
+                "0:     ipm     %0\n"
+                "       srl     %0,28\n"
+                "1:     sam64\n"
+                EX_TABLE(0b, 1b)
+                : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
+#else
+        asm volatile(
+                "       lhi     %0,-1\n"
+                "       diag    %1,0,0x210\n"
+                "0:     ipm     %0\n"
+                "       srl     %0,28\n"
+                "1:\n"
+                EX_TABLE(0b, 1b)
+                : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
+#endif
+
+        *addr = diag210_tmp;
+        spin_unlock_irqrestore(&diag210_lock, flags);
+
+        return ccode;
+}
+EXPORT_SYMBOL(diag210);