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author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 11:17:24 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 11:17:24 +0200 |
commit | 250c22777fe1ccd7ac588579a6c16db4c0161cc5 (patch) | |
tree | 55c317efb7d792ec6fdae1d1937c67a502c48dec /arch/x86/kernel/vsmp_64.c | |
parent | 2db55d344e529492545cb3b755c7e9ba8e4fa94e (diff) | |
download | blackbird-op-linux-250c22777fe1ccd7ac588579a6c16db4c0161cc5.tar.gz blackbird-op-linux-250c22777fe1ccd7ac588579a6c16db4c0161cc5.zip |
x86_64: move kernel
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/vsmp_64.c')
-rw-r--r-- | arch/x86/kernel/vsmp_64.c | 49 |
1 files changed, 49 insertions, 0 deletions
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 <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); |