diff options
| author | Ravikiran G Thirumalai <kiran@scalex86.org> | 2006-01-11 22:46:18 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:05:01 -0800 |
| commit | 79f12614a6537cc3ac9ca4d1ea26f6e4f4a34aee (patch) | |
| tree | 25167c8862ad7733c7e044b0aad67e4291a0681b /arch/x86_64/kernel/vsmp.c | |
| parent | 5fd63b308569060ffa40af52ed122d9734111bff (diff) | |
[PATCH] x86_64: Inclusion of ScaleMP vSMP architecture patches - vsmp_arch
Introduce vSMP arch to the kernel.
This patch:
1. Adds CONFIG_X86_VSMP
2. Adds machine specific macros for local_irq_disabled, local_irq_enabled
and irqs_disabled
3. Writes to the vSMP CTL device to indicate kernel compiled with CONFIG_VSMP
Signed-off-by: Ravikiran Thirumalai <kiran@scalemp.com>
Signed-off-by: Shai Fultheim <shai@scalemp.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/vsmp.c')
| -rw-r--r-- | arch/x86_64/kernel/vsmp.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/vsmp.c b/arch/x86_64/kernel/vsmp.c new file mode 100644 index 00000000000..92f70c74965 --- /dev/null +++ b/arch/x86_64/kernel/vsmp.c @@ -0,0 +1,45 @@ +/* + * 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> + +static int __init vsmp_init(void) +{ + void *address; + unsigned int cap, ctl; + + /* 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); |