8c5a09082f
Define pcibus_to_node to be able to figure out which NUMA node contains a given PCI device. This defines pcibus_to_node(bus) in include/linux/topology.h and adjusts the macros for i386 and x86_64 that already provided a way to determine the cpumask of a pci device. x86_64 was changed to not build an array of cpumasks anymore. Instead an array of nodes is build which can be used to generate the cpumask via node_to_cpumask. Signed-off-by: Christoph Lameter <christoph@lameter.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
|
|
* linux/include/asm-i386/topology.h
|
|
*
|
|
* Written by: Matthew Dobson, IBM Corporation
|
|
*
|
|
* Copyright (C) 2002, IBM Corp.
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
|
* NON INFRINGEMENT. See the GNU General Public License for more
|
|
* details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* Send feedback to <colpatch@us.ibm.com>
|
|
*/
|
|
#ifndef _ASM_I386_TOPOLOGY_H
|
|
#define _ASM_I386_TOPOLOGY_H
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#include <asm/mpspec.h>
|
|
|
|
#include <linux/cpumask.h>
|
|
|
|
/* Mappings between logical cpu number and node number */
|
|
extern cpumask_t node_2_cpu_mask[];
|
|
extern int cpu_2_node[];
|
|
|
|
/* Returns the number of the node containing CPU 'cpu' */
|
|
static inline int cpu_to_node(int cpu)
|
|
{
|
|
return cpu_2_node[cpu];
|
|
}
|
|
|
|
/* Returns the number of the node containing Node 'node'. This architecture is flat,
|
|
so it is a pretty simple function! */
|
|
#define parent_node(node) (node)
|
|
|
|
/* Returns a bitmask of CPUs on Node 'node'. */
|
|
static inline cpumask_t node_to_cpumask(int node)
|
|
{
|
|
return node_2_cpu_mask[node];
|
|
}
|
|
|
|
/* Returns the number of the first CPU on Node 'node'. */
|
|
static inline int node_to_first_cpu(int node)
|
|
{
|
|
cpumask_t mask = node_to_cpumask(node);
|
|
return first_cpu(mask);
|
|
}
|
|
|
|
#define pcibus_to_node(bus) mp_bus_id_to_node[(bus)->number]
|
|
#define pcibus_to_cpumask(bus) node_to_cpumask(pcibus_to_node(bus))
|
|
|
|
/* sched_domains SD_NODE_INIT for NUMAQ machines */
|
|
#define SD_NODE_INIT (struct sched_domain) { \
|
|
.span = CPU_MASK_NONE, \
|
|
.parent = NULL, \
|
|
.groups = NULL, \
|
|
.min_interval = 8, \
|
|
.max_interval = 32, \
|
|
.busy_factor = 32, \
|
|
.imbalance_pct = 125, \
|
|
.cache_hot_time = (10*1000000), \
|
|
.cache_nice_tries = 1, \
|
|
.per_cpu_gain = 100, \
|
|
.flags = SD_LOAD_BALANCE \
|
|
| SD_BALANCE_EXEC \
|
|
| SD_BALANCE_NEWIDLE \
|
|
| SD_WAKE_IDLE \
|
|
| SD_WAKE_BALANCE, \
|
|
.last_balance = jiffies, \
|
|
.balance_interval = 1, \
|
|
.nr_balance_failed = 0, \
|
|
}
|
|
|
|
extern unsigned long node_start_pfn[];
|
|
extern unsigned long node_end_pfn[];
|
|
extern unsigned long node_remap_size[];
|
|
|
|
#define node_has_online_mem(nid) (node_start_pfn[nid] != node_end_pfn[nid])
|
|
|
|
#else /* !CONFIG_NUMA */
|
|
/*
|
|
* Other i386 platforms should define their own version of the
|
|
* above macros here.
|
|
*/
|
|
|
|
#include <asm-generic/topology.h>
|
|
|
|
#endif /* CONFIG_NUMA */
|
|
|
|
#endif /* _ASM_I386_TOPOLOGY_H */
|