Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/s390/kernel/cpcmd.c b/arch/s390/kernel/cpcmd.c
new file mode 100644
index 0000000..44df8dc
--- /dev/null
+++ b/arch/s390/kernel/cpcmd.c
@@ -0,0 +1,111 @@
+/*
+ * arch/s390/kernel/cpcmd.c
+ *
+ * S390 version
+ * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
+ * Christian Borntraeger (cborntra@de.ibm.com),
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/stddef.h>
+#include <linux/string.h>
+#include <asm/ebcdic.h>
+#include <asm/cpcmd.h>
+#include <asm/system.h>
+
+static DEFINE_SPINLOCK(cpcmd_lock);
+static char cpcmd_buf[240];
+
+/*
+ * the caller of __cpcmd has to ensure that the response buffer is below 2 GB
+ */
+void __cpcmd(char *cmd, char *response, int rlen)
+{
+ const int mask = 0x40000000L;
+ unsigned long flags;
+ int cmdlen;
+
+ spin_lock_irqsave(&cpcmd_lock, flags);
+ cmdlen = strlen(cmd);
+ BUG_ON(cmdlen > 240);
+ strcpy(cpcmd_buf, cmd);
+ ASCEBC(cpcmd_buf, cmdlen);
+
+ if (response != NULL && rlen > 0) {
+ memset(response, 0, rlen);
+#ifndef CONFIG_ARCH_S390X
+ asm volatile ("LRA 2,0(%0)\n\t"
+ "LR 4,%1\n\t"
+ "O 4,%4\n\t"
+ "LRA 3,0(%2)\n\t"
+ "LR 5,%3\n\t"
+ ".long 0x83240008 # Diagnose X'08'\n\t"
+ : /* no output */
+ : "a" (cpcmd_buf), "d" (cmdlen),
+ "a" (response), "d" (rlen), "m" (mask)
+ : "cc", "2", "3", "4", "5" );
+#else /* CONFIG_ARCH_S390X */
+ asm volatile (" lrag 2,0(%0)\n"
+ " lgr 4,%1\n"
+ " o 4,%4\n"
+ " lrag 3,0(%2)\n"
+ " lgr 5,%3\n"
+ " sam31\n"
+ " .long 0x83240008 # Diagnose X'08'\n"
+ " sam64"
+ : /* no output */
+ : "a" (cpcmd_buf), "d" (cmdlen),
+ "a" (response), "d" (rlen), "m" (mask)
+ : "cc", "2", "3", "4", "5" );
+#endif /* CONFIG_ARCH_S390X */
+ EBCASC(response, rlen);
+ } else {
+#ifndef CONFIG_ARCH_S390X
+ asm volatile ("LRA 2,0(%0)\n\t"
+ "LR 3,%1\n\t"
+ ".long 0x83230008 # Diagnose X'08'\n\t"
+ : /* no output */
+ : "a" (cpcmd_buf), "d" (cmdlen)
+ : "2", "3" );
+#else /* CONFIG_ARCH_S390X */
+ asm volatile (" lrag 2,0(%0)\n"
+ " lgr 3,%1\n"
+ " sam31\n"
+ " .long 0x83230008 # Diagnose X'08'\n"
+ " sam64"
+ : /* no output */
+ : "a" (cpcmd_buf), "d" (cmdlen)
+ : "2", "3" );
+#endif /* CONFIG_ARCH_S390X */
+ }
+ spin_unlock_irqrestore(&cpcmd_lock, flags);
+}
+
+EXPORT_SYMBOL(__cpcmd);
+
+#ifdef CONFIG_ARCH_S390X
+void cpcmd(char *cmd, char *response, int rlen)
+{
+ char *lowbuf;
+ if ((rlen == 0) || (response == NULL)
+ || !((unsigned long)response >> 31))
+ __cpcmd(cmd, response, rlen);
+ else {
+ lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
+ if (!lowbuf) {
+ printk(KERN_WARNING
+ "cpcmd: could not allocate response buffer\n");
+ return;
+ }
+ __cpcmd(cmd, lowbuf, rlen);
+ memcpy(response, lowbuf, rlen);
+ kfree(lowbuf);
+ }
+}
+
+EXPORT_SYMBOL(cpcmd);
+#endif /* CONFIG_ARCH_S390X */
