Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * 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);