2 * vSMPowered(tm) systems specific initialization
3 * Copyright (C) 2005 ScaleMP Inc.
5 * Use of this code is subject to the terms and conditions of the
6 * GNU general public license version 2. See "COPYING" or
7 * http://www.gnu.org/licenses/gpl.html
9 * Ravikiran Thirumalai <kiran@scalemp.com>,
10 * Shai Fultheim <shai@scalemp.com>
13 #include <linux/init.h>
14 #include <linux/pci_ids.h>
15 #include <linux/pci_regs.h>
16 #include <asm/pci-direct.h>
19 static int __init vsmp_init(void)
22 unsigned int cap, ctl;
24 if (!early_pci_allowed())
27 /* Check if we are running on a ScaleMP vSMP box */
28 if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) !=
29 PCI_VENDOR_ID_SCALEMP) ||
30 (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) !=
31 PCI_DEVICE_ID_SCALEMP_VSMP_CTL))
34 /* set vSMP magic bits to indicate vSMP capable kernel */
35 address = ioremap(read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0), 8);
37 ctl = readl(address + 4);
38 printk(KERN_INFO "vSMP CTL: capabilities:0x%08x control:0x%08x\n",
40 if (cap & ctl & (1 << 4)) {
41 /* Turn on vSMP IRQ fastpath handling (see system.h) */
43 writel(ctl, address + 4);
44 ctl = readl(address + 4);
45 printk(KERN_INFO "vSMP CTL: control set to:0x%08x\n", ctl);
52 core_initcall(vsmp_init);