From 250c22777fe1ccd7ac588579a6c16db4c0161cc5 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:17:24 +0200 Subject: x86_64: move kernel Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/kernel/vsmp_64.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 arch/x86/kernel/vsmp_64.c (limited to 'arch/x86/kernel/vsmp_64.c') diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c new file mode 100644 index 000000000000..414caf0c5f9a --- /dev/null +++ b/arch/x86/kernel/vsmp_64.c @@ -0,0 +1,49 @@ +/* + * 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 , + * Shai Fultheim + */ + +#include +#include +#include +#include +#include + +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); -- cgit v1.2.3