/* * 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(KERN_INFO "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(KERN_INFO "vSMP CTL: control set to:0x%08x\n", ctl); } iounmap(address); return 0; } core_initcall(vsmp_init);