x86_64: move kernel

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
new file mode 100644
index 000000000000..414caf0c5f9a
--- /dev/null
+++ b/arch/x86/kernel/vsmp_64.c
@@ -0,0 +1,49 @@
+/*
+ * vSMPowered(tm) systems specific initialization
+ * Copyright (C) 2005 ScaleMP Inc.
+ *
+ * Use of this code is subject to the terms and conditions of the
+ * GNU general public license version 2. See "COPYING" or
+ * http://www.gnu.org/licenses/gpl.html
+ *
+ * Ravikiran Thirumalai <kiran@scalemp.com>,
+ * Shai Fultheim <shai@scalemp.com>
+ */
+
+#include <linux/init.h>
+#include <linux/pci_ids.h>
+#include <linux/pci_regs.h>
+#include <asm/pci-direct.h>
+#include <asm/io.h>
+
+static int __init vsmp_init(void)
+{
+        void *address;
+        unsigned int cap, ctl;
+
+        if (!early_pci_allowed())
+                return 0;
+
+        /* Check if we are running on a ScaleMP vSMP box */
+        if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) != PCI_VENDOR_ID_SCALEMP) ||
+            (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) != PCI_DEVICE_ID_SCALEMP_VSMP_CTL))
+                return 0;
+
+        /* set vSMP magic bits to indicate vSMP capable kernel */
+        address = ioremap(read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0), 8);
+        cap = readl(address);
+        ctl = readl(address + 4);
+        printk("vSMP CTL: capabilities:0x%08x  control:0x%08x\n", cap, ctl);
+        if (cap & ctl & (1 << 4)) {
+                /* Turn on vSMP IRQ fastpath handling (see system.h) */
+                ctl &= ~(1 << 4);
+                writel(ctl, address + 4);
+                ctl = readl(address + 4);
+                printk("vSMP CTL: control set to:0x%08x\n", ctl);
+        }
+
+        iounmap(address);
+        return 0;
+}
+
+core_initcall(vsmp_init);