You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.4 KiB
49 lines
1.4 KiB
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* This file contains NUMA specific variables and functions which can
|
|
* be split away from DISCONTIGMEM and are used on NUMA machines with
|
|
* contiguous memory.
|
|
*
|
|
* 2002/08/07 Erich Focht <efocht@ess.nec.de>
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/cpu.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/node.h>
|
|
#include <linux/init.h>
|
|
#include <linux/bootmem.h>
|
|
#include <asm/mmzone.h>
|
|
#include <asm/numa.h>
|
|
|
|
|
|
/*
|
|
* The following structures are usually initialized by ACPI or
|
|
* similar mechanisms and describe the NUMA characteristics of the machine.
|
|
*/
|
|
int num_node_memblks;
|
|
struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
|
|
struct node_cpuid_s node_cpuid[NR_CPUS];
|
|
/*
|
|
* This is a matrix with "distances" between nodes, they should be
|
|
* proportional to the memory access latency ratios.
|
|
*/
|
|
u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
|
|
|
|
/* Identify which cnode a physical address resides on */
|
|
int
|
|
paddr_to_nid(unsigned long paddr)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < num_node_memblks; i++)
|
|
if (paddr >= node_memblk[i].start_paddr &&
|
|
paddr < node_memblk[i].start_paddr + node_memblk[i].size)
|
|
break;
|
|
|
|
return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
|
|
}
|
|
|