projects / deliverable / linux.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> | |
| 734c4c67 | 17 | #include <asm/io.h> |
| 79f12614 RT |
18 | |
| 19 | static int __init vsmp_init(void) | |
| 20 | { | |
| 21 | void *address; | |
| 22 | unsigned int cap, ctl; | |
| 23 | ||
| 0637a70a AK |
24 | if (!early_pci_allowed()) |
| 25 | return 0; | |
| 26 | ||
| 79f12614 | 27 | /* Check if we are running on a ScaleMP vSMP box */ |
| ed4aed98 TG |
28 | if ((read_pci_config_16(0, 0x1f, 0, PCI_VENDOR_ID) != |
| 29 | PCI_VENDOR_ID_SCALEMP) || | |
| 30 | (read_pci_config_16(0, 0x1f, 0, PCI_DEVICE_ID) != | |
| 31 | PCI_DEVICE_ID_SCALEMP_VSMP_CTL)) | |
| 79f12614 RT |
32 | return 0; |
| 33 | ||
| 34 | /* set vSMP magic bits to indicate vSMP capable kernel */ | |
| 35 | address = ioremap(read_pci_config(0, 0x1f, 0, PCI_BASE_ADDRESS_0), 8); | |
| 36 | cap = readl(address); | |
| 37 | ctl = readl(address + 4); | |
| ed4aed98 TG |
38 | printk(KERN_INFO "vSMP CTL: capabilities:0x%08x control:0x%08x\n", |
| 39 | cap, ctl); | |
| 79f12614 RT |
40 | if (cap & ctl & (1 << 4)) { |
| 41 | /* Turn on vSMP IRQ fastpath handling (see system.h) */ | |
| 42 | ctl &= ~(1 << 4); | |
| 43 | writel(ctl, address + 4); | |
| 44 | ctl = readl(address + 4); | |
| ed4aed98 | 45 | printk(KERN_INFO "vSMP CTL: control set to:0x%08x\n", ctl); |
| 79f12614 RT |
46 | } |
| 47 | ||
| 48 | iounmap(address); | |
| 49 | return 0; | |
| 50 | } | |
| 51 | ||
| 52 | core_initcall(vsmp_init); |