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>
18 static int __init
vsmp_init(void)
21 unsigned int cap
, ctl
;
23 /* Check if we are running on a ScaleMP vSMP box */
24 if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID
) != PCI_VENDOR_ID_SCALEMP
) ||
25 (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID
) != PCI_DEVICE_ID_SCALEMP_VSMP_CTL
))
28 /* set vSMP magic bits to indicate vSMP capable kernel */
29 address
= ioremap(read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0
), 8);
31 ctl
= readl(address
+ 4);
32 printk("vSMP CTL: capabilities:0x%08x control:0x%08x\n", cap
, ctl
);
33 if (cap
& ctl
& (1 << 4)) {
34 /* Turn on vSMP IRQ fastpath handling (see system.h) */
36 writel(ctl
, address
+ 4);
37 ctl
= readl(address
+ 4);
38 printk("vSMP CTL: control set to:0x%08x\n", ctl
);
45 core_initcall(vsmp_init
);