mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 21:46:47 +07:00
cf05013286
Saves about ~18K .text in defconfig There would be more optimization potential, but that's for later. Suggestion originally from Bill Irwin. Fix from Andy Whitcroft. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* K8 NUMA support */
|
|
/* Copyright 2002,2003 by Andi Kleen, SuSE Labs */
|
|
/* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */
|
|
#ifndef _ASM_X86_64_MMZONE_H
|
|
#define _ASM_X86_64_MMZONE_H 1
|
|
|
|
#include <linux/config.h>
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#define VIRTUAL_BUG_ON(x)
|
|
|
|
#include <asm/smp.h>
|
|
|
|
#define NODEMAPSIZE 0xfff
|
|
|
|
/* Simple perfect hash to map physical addresses to node numbers */
|
|
extern int memnode_shift;
|
|
extern u8 memnodemap[NODEMAPSIZE];
|
|
|
|
extern struct pglist_data *node_data[];
|
|
|
|
static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
|
|
{
|
|
unsigned nid;
|
|
VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
|
|
nid = memnodemap[addr >> memnode_shift];
|
|
VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
|
|
return nid;
|
|
}
|
|
|
|
#define NODE_DATA(nid) (node_data[nid])
|
|
|
|
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
|
|
#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
|
|
NODE_DATA(nid)->node_spanned_pages)
|
|
|
|
#ifdef CONFIG_DISCONTIGMEM
|
|
#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
|
|
#define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr))
|
|
|
|
extern struct page *pfn_to_page(unsigned long pfn);
|
|
extern unsigned long page_to_pfn(struct page *page);
|
|
extern int pfn_valid(unsigned long pfn);
|
|
#endif
|
|
|
|
#define local_mapnr(kvaddr) \
|
|
( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)) )
|
|
#endif
|
|
#endif
|