projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 79f12614 RT |
1 | /* |
| 2 | * vSMPowered(tm) systems specific initialization | |
| 3 | * Copyright (C) 2005 ScaleMP Inc. | |
| 4 | * | |
| 5 | * Use of this code is subject to the terms and conditions of the | |
| 6 | * GNU general public license version 2. See "COPYING" or | |
| 7 | * http://www.gnu.org/licenses/gpl.html | |
| 8 | * | |
| 9 | * Ravikiran Thirumalai <kiran@scalemp.com>, | |
| 10 | * Shai Fultheim <shai@scalemp.com> | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/pci_ids.h> | |
| 15 | #include <linux/pci_regs.h> | |
| 16 | #include <asm/pci-direct.h> | |
| 17 | ||
| 18 | static int __init vsmp_init(void) | |
| 19 | { | |
| 20 | void *address; | |
| 21 | unsigned int cap, ctl; | |
| 22 | ||
| 23 | /* Check if we are running on a ScaleMP vSMP box */ | |
| 24 | if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) != PCI_VENDOR_ID_SCALEMP) || | |
| 25 | (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) != PCI_DEVICE_ID_SCALEMP_VSMP_CTL)) | |
| 26 | return 0; | |
| 27 | ||
| 28 | /* set vSMP magic bits to indicate vSMP capable kernel */ | |
| 29 | address = ioremap(read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0), 8); | |
| 30 | cap = readl(address); | |
| 31 | ctl = readl(address + 4); | |
| 32 | printk("vSMP CTL: capabilities:0x%08x control:0x%08x\n", cap, ctl); | |
| 33 | if (cap & ctl & (1 << 4)) { | |
| 34 | /* Turn on vSMP IRQ fastpath handling (see system.h) */ | |
| 35 | ctl &= ~(1 << 4); | |
| 36 | writel(ctl, address + 4); | |
| 37 | ctl = readl(address + 4); | |
| 38 | printk("vSMP CTL: control set to:0x%08x\n", ctl); | |
| 39 | } | |
| 40 | ||
| 41 | iounmap(address); | |
| 42 | return 0; | |
| 43 | } | |
| 44 | ||
| 45 | core_initcall(vsmp_init); |