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) != PCI_VENDOR_ID_SCALEMP) ||
29 (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) != PCI_DEVICE_ID_SCALEMP_VSMP_CTL))
32 /* set vSMP magic bits to indicate vSMP capable kernel */
33 address = ioremap(read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0), 8);
35 ctl = readl(address + 4);
36 printk("vSMP CTL: capabilities:0x%08x control:0x%08x\n", cap, ctl);
37 if (cap & ctl & (1 << 4)) {
38 /* Turn on vSMP IRQ fastpath handling (see system.h) */
40 writel(ctl, address + 4);
41 ctl = readl(address + 4);
42 printk("vSMP CTL: control set to:0x%08x\n", ctl);
49 core_initcall(vsmp_init);