This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / x86_64 / kernel / vsmp.c

diff --git a/arch/x86_64/kernel/vsmp.c b/arch/x86_64/kernel/vsmp.c
new file mode 100644 (file)
index 0000000..92f70c7
--- /dev/null
+++ b/arch/x86_64/kernel/vsmp.c
@@ -0,0 +1,45 @@
+/*
+ * 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>
+
+static int __init vsmp_init(void)
+{
+       void *address;
+       unsigned int cap, ctl;
+
+       /* 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);