250c22777f
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
/*
|
|
* 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);
|