2005-04-17 02:20:36 +04:00
/*
* Written by Kanoj Sarcar ( kanoj @ sgi . com ) Aug 99
* Adapted for the alpha wildfire architecture Jan 2001.
*/
# ifndef _ASM_MMZONE_H_
# define _ASM_MMZONE_H_
# include <linux/config.h>
# include <asm/smp.h>
struct bootmem_data_t ; /* stupid forward decl. */
/*
* Following are macros that are specific to this numa platform .
*/
extern pg_data_t node_data [ ] ;
# define alpha_pa_to_nid(pa) \
( alpha_mv . pa_to_nid \
? alpha_mv . pa_to_nid ( pa ) \
: ( 0 ) )
# define node_mem_start(nid) \
( alpha_mv . node_mem_start \
? alpha_mv . node_mem_start ( nid ) \
: ( 0UL ) )
# define node_mem_size(nid) \
( alpha_mv . node_mem_size \
? alpha_mv . node_mem_size ( nid ) \
: ( ( nid ) ? ( 0UL ) : ( ~ 0UL ) ) )
# define pa_to_nid(pa) alpha_pa_to_nid(pa)
# define NODE_DATA(nid) (&node_data[(nid)])
# define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
# if 1
# define PLAT_NODE_DATA_LOCALNR(p, n) \
( ( ( p ) > > PAGE_SHIFT ) - PLAT_NODE_DATA ( n ) - > gendata . node_start_pfn )
# else
static inline unsigned long
PLAT_NODE_DATA_LOCALNR ( unsigned long p , int n )
{
unsigned long temp ;
temp = p > > PAGE_SHIFT ;
return temp - PLAT_NODE_DATA ( n ) - > gendata . node_start_pfn ;
}
# endif
# ifdef CONFIG_DISCONTIGMEM
/*
* Following are macros that each numa implementation must define .
*/
/*
* Given a kernel address , find the home node of the underlying memory .
*/
# define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
# define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
# define local_mapnr(kvaddr) \
( ( __pa ( kvaddr ) > > PAGE_SHIFT ) - node_start_pfn ( kvaddr_to_nid ( kvaddr ) ) )
/*
* Given a kaddr , LOCAL_BASE_ADDR finds the owning node of the memory
* and returns the kaddr corresponding to first physical page in the
* node ' s mem_map .
*/
# define LOCAL_BASE_ADDR(kaddr) \
( ( unsigned long ) __va ( NODE_DATA ( kvaddr_to_nid ( kaddr ) ) - > node_start_pfn \
< < PAGE_SHIFT ) )
/* XXX: FIXME -- wli */
# define kern_addr_valid(kaddr) (0)
# define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
# define VALID_PAGE(page) (((page) - mem_map) < max_mapnr)
# define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> 32))
# define pte_pfn(pte) (pte_val(pte) >> 32)
# define mk_pte(page, pgprot) \
( { \
pte_t pte ; \
unsigned long pfn ; \
\
pfn = ( ( unsigned long ) ( ( page ) - page_zone ( page ) - > zone_mem_map ) ) < < 32 ; \
pfn + = page_zone ( page ) - > zone_start_pfn < < 32 ; \
pte_val ( pte ) = pfn | pgprot_val ( pgprot ) ; \
\
pte ; \
} )
# define pte_page(x) \
( { \
unsigned long kvirt ; \
struct page * __xx ; \
\
kvirt = ( unsigned long ) __va ( pte_val ( x ) > > ( 32 - PAGE_SHIFT ) ) ; \
__xx = virt_to_page ( kvirt ) ; \
\
__xx ; \
} )
# define pfn_to_page(pfn) \
( { \
unsigned long kaddr = ( unsigned long ) __va ( ( pfn ) < < PAGE_SHIFT ) ; \
[PATCH] remove non-DISCONTIG use of pgdat->node_mem_map
This patch effectively eliminates direct use of pgdat->node_mem_map outside
of the DISCONTIG code. On a flat memory system, these fields aren't
currently used, neither are they on a sparsemem system.
There was also a node_mem_map(nid) macro on many architectures. Its use
along with the use of ->node_mem_map itself was not consistent. It has
been removed in favor of two new, more explicit, arch-independent macros:
pgdat_page_nr(pgdat, pagenr)
nid_page_nr(nid, pagenr)
I called them "pgdat" and "nid" because we overload the term "node" to mean
"NUMA node", "DISCONTIG node" or "pg_data_t" in very confusing ways. I
believe the newer names are much clearer.
These macros can be overridden in the sparsemem case with a theoretically
slower operation using node_start_pfn and pfn_to_page(), instead. We could
make this the only behavior if people want, but I don't want to change too
much at once. One thing at a time.
This patch removes more code than it adds.
Compile tested on alpha, alpha discontig, arm, arm-discontig, i386, i386
generic, NUMAQ, Summit, ppc64, ppc64 discontig, and x86_64. Full list
here: http://sr71.net/patches/2.6.12/2.6.12-rc1-mhp2/configs/
Boot tested on NUMAQ, x86 SMP and ppc64 power4/5 LPARs.
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Martin J. Bligh <mbligh@aracnet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 11:07:37 +04:00
( NODE_DATA ( kvaddr_to_nid ( kaddr ) ) - > node_mem_map + local_mapnr ( kaddr ) ) ; \
2005-04-17 02:20:36 +04:00
} )
# define page_to_pfn(page) \
( ( page ) - page_zone ( page ) - > zone_mem_map + \
( page_zone ( page ) - > zone_start_pfn ) )
# define page_to_pa(page) \
( ( ( ( page ) - page_zone ( page ) - > zone_mem_map ) \
+ page_zone ( page ) - > zone_start_pfn ) < < PAGE_SHIFT )
# define pfn_to_nid(pfn) pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
# define pfn_valid(pfn) \
( ( ( pfn ) - node_start_pfn ( pfn_to_nid ( pfn ) ) ) < \
node_spanned_pages ( pfn_to_nid ( pfn ) ) ) \
# define virt_addr_valid(kaddr) pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
# endif /* CONFIG_DISCONTIGMEM */
# endif /* _ASM_MMZONE_H_ */