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[PATCH] sparsemem memory model for i386

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Provide the architecture specific implementation for SPARSEMEM for i386 SMP
and NUMA systems.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Martin Bligh <mbligh@aracnet.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andy Whitcroft 2005-06-23 00:07:57 -07:00 committed by Linus Torvalds
parent d41dee369b
commit 05b79bdcb4
9 changed files with 137 additions and 83 deletions
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24
arch/i386/Kconfig
View file

@ -68,7 +68,6 @@ config X86_VOYAGER
config X86_NUMAQ
bool "NUMAQ (IBM/Sequent)"
select DISCONTIGMEM
select NUMA
help
This option is used for getting Linux to run on a (IBM/Sequent) NUMA
@ -783,11 +782,6 @@ comment "NUMA (NUMA-Q) requires SMP, 64GB highmem support"
comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI)
config ARCH_DISCONTIGMEM_ENABLE
bool
depends on NUMA
default y
config HAVE_ARCH_BOOTMEM_NODE
bool
depends on NUMA
@ -800,7 +794,7 @@ config ARCH_HAVE_MEMORY_PRESENT
config NEED_NODE_MEMMAP_SIZE
bool
depends on DISCONTIGMEM
depends on DISCONTIGMEM || SPARSEMEM
default y
config HAVE_ARCH_ALLOC_REMAP
@ -808,6 +802,22 @@ config HAVE_ARCH_ALLOC_REMAP
depends on NUMA
default y
config ARCH_DISCONTIGMEM_ENABLE
def_bool y
depends on NUMA
config ARCH_DISCONTIGMEM_DEFAULT
def_bool y
depends on NUMA
config ARCH_SPARSEMEM_ENABLE
def_bool y
depends on NUMA
config ARCH_SELECT_MEMORY_MODEL
def_bool y
depends on ARCH_SPARSEMEM_ENABLE
source "mm/Kconfig"
config HAVE_ARCH_EARLY_PFN_TO_NID

8
arch/i386/kernel/setup.c
View file

@ -25,6 +25,7 @@
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/tty.h>
#include <linux/ioport.h>
#include <linux/acpi.h>
@ -1022,7 +1023,7 @@ static void __init reserve_ebda_region(void)
reserve_bootmem(addr, PAGE_SIZE);
}
#ifndef CONFIG_DISCONTIGMEM
#ifndef CONFIG_NEED_MULTIPLE_NODES
void __init setup_bootmem_allocator(void);
static unsigned long __init setup_memory(void)
{
@ -1072,9 +1073,9 @@ void __init zone_sizes_init(void)
free_area_init(zones_size);
}
#else
extern unsigned long setup_memory(void);
extern unsigned long __init setup_memory(void);
extern void zone_sizes_init(void);
#endif /* !CONFIG_DISCONTIGMEM */
#endif /* !CONFIG_NEED_MULTIPLE_NODES */
void __init setup_bootmem_allocator(void)
{
@ -1475,6 +1476,7 @@ void __init setup_arch(char **cmdline_p)
#endif
paging_init();
remapped_pgdat_init();
sparse_init();
zone_sizes_init();
/*

2
arch/i386/mm/Makefile
View file

@ -4,7 +4,7 @@
obj-y := init.o pgtable.o fault.o ioremap.o extable.o pageattr.o mmap.o
obj-$(CONFIG_DISCONTIGMEM) += discontig.o
obj-$(CONFIG_NUMA) += discontig.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_HIGHMEM) += highmem.o
obj-$(CONFIG_BOOT_IOREMAP) += boot_ioremap.o

36
arch/i386/mm/discontig.c
View file

@ -42,12 +42,16 @@ bootmem_data_t node0_bdata;
* populated the following initialisation.
*
* 1) node_online_map - the map of all nodes configured (online) in the system
* 2) physnode_map - the mapping between a pfn and owning node
* 3) node_start_pfn - the starting page frame number for a node
* 2) node_start_pfn - the starting page frame number for a node
* 3) node_end_pfn - the ending page fram number for a node
*/
unsigned long node_start_pfn[MAX_NUMNODES];
unsigned long node_end_pfn[MAX_NUMNODES];
#ifdef CONFIG_DISCONTIGMEM
/*
* 4) physnode_map - the mapping between a pfn and owning node
* physnode_map keeps track of the physical memory layout of a generic
* numa node on a 256Mb break (each element of the array will
* represent 256Mb of memory and will be marked by the node id. so,
@ -85,9 +89,7 @@ unsigned long node_memmap_size_bytes(int nid, unsigned long start_pfn,
return (nr_pages + 1) * sizeof(struct page);
}
unsigned long node_start_pfn[MAX_NUMNODES];
unsigned long node_end_pfn[MAX_NUMNODES];
#endif
extern unsigned long find_max_low_pfn(void);
extern void find_max_pfn(void);
@ -390,24 +392,26 @@ void __init set_highmem_pages_init(int bad_ppro)
{
#ifdef CONFIG_HIGHMEM
struct zone *zone;
struct page *page;
for_each_zone(zone) {
unsigned long node_pfn, node_high_size, zone_start_pfn;
struct page * zone_mem_map;
unsigned long node_pfn, zone_start_pfn, zone_end_pfn;
if (!is_highmem(zone))
continue;
printk("Initializing %s for node %d\n", zone->name,
zone->zone_pgdat->node_id);
node_high_size = zone->spanned_pages;
zone_mem_map = zone->zone_mem_map;
zone_start_pfn = zone->zone_start_pfn;
zone_end_pfn = zone_start_pfn + zone->spanned_pages;
for (node_pfn = 0; node_pfn < node_high_size; node_pfn++) {
one_highpage_init((struct page *)(zone_mem_map + node_pfn),
zone_start_pfn + node_pfn, bad_ppro);
printk("Initializing %s for node %d (%08lx:%08lx)\n",
zone->name, zone->zone_pgdat->node_id,
zone_start_pfn, zone_end_pfn);
for (node_pfn = zone_start_pfn; node_pfn < zone_end_pfn; node_pfn++) {
if (!pfn_valid(node_pfn))
continue;
page = pfn_to_page(node_pfn);
one_highpage_init(page, node_pfn, bad_ppro);
}
}
totalram_pages += totalhigh_pages;

18
arch/i386/mm/init.c
View file

@ -276,7 +276,9 @@ void __init one_highpage_init(struct page *page, int pfn, int bad_ppro)
SetPageReserved(page);
}
#ifndef CONFIG_DISCONTIGMEM
#ifdef CONFIG_NUMA
extern void set_highmem_pages_init(int);
#else
static void __init set_highmem_pages_init(int bad_ppro)
{
int pfn;
@ -284,9 +286,7 @@ static void __init set_highmem_pages_init(int bad_ppro)
one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
totalram_pages += totalhigh_pages;
}
#else
extern void set_highmem_pages_init(int);
#endif /* !CONFIG_DISCONTIGMEM */
#endif /* CONFIG_FLATMEM */
#else
#define kmap_init() do { } while (0)
@ -297,10 +297,10 @@ extern void set_highmem_pages_init(int);
unsigned long long __PAGE_KERNEL = _PAGE_KERNEL;
unsigned long long __PAGE_KERNEL_EXEC = _PAGE_KERNEL_EXEC;
#ifndef CONFIG_DISCONTIGMEM
#define remap_numa_kva() do {} while (0)
#else
#ifdef CONFIG_NUMA
extern void __init remap_numa_kva(void);
#else
#define remap_numa_kva() do {} while (0)
#endif
static void __init pagetable_init (void)
@ -525,7 +525,7 @@ static void __init set_max_mapnr_init(void)
#else
num_physpages = max_low_pfn;
#endif
#ifndef CONFIG_DISCONTIGMEM
#ifdef CONFIG_FLATMEM
max_mapnr = num_physpages;
#endif
}
@ -539,7 +539,7 @@ void __init mem_init(void)
int tmp;
int bad_ppro;
#ifndef CONFIG_DISCONTIGMEM
#ifdef CONFIG_FLATMEM
if (!mem_map)
BUG();
#endif

93
include/asm-i386/mmzone.h
View file

@ -8,7 +8,9 @@
#include <asm/smp.h>
#ifdef CONFIG_DISCONTIGMEM
#if CONFIG_NUMA
extern struct pglist_data *node_data[];
#define NODE_DATA(nid) (node_data[nid])
#ifdef CONFIG_NUMA
#ifdef CONFIG_X86_NUMAQ
@ -21,8 +23,28 @@
#define get_zholes_size(n) (0)
#endif /* CONFIG_NUMA */
extern struct pglist_data *node_data[];
#define NODE_DATA(nid) (node_data[nid])
extern int get_memcfg_numa_flat(void );
/*
* This allows any one NUMA architecture to be compiled
* for, and still fall back to the flat function if it
* fails.
*/
static inline void get_memcfg_numa(void)
{
#ifdef CONFIG_X86_NUMAQ
if (get_memcfg_numaq())
return;
#elif CONFIG_ACPI_SRAT
if (get_memcfg_from_srat())
return;
#endif
get_memcfg_numa_flat();
}
#endif /* CONFIG_NUMA */
#ifdef CONFIG_DISCONTIGMEM
/*
* generic node memory support, the following assumptions apply:
@ -48,26 +70,6 @@ static inline int pfn_to_nid(unsigned long pfn)
#endif
}
/*
* Following are macros that are specific to this numa platform.
*/
#define reserve_bootmem(addr, size) \
reserve_bootmem_node(NODE_DATA(0), (addr), (size))
#define alloc_bootmem(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
#define alloc_bootmem_pages(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
#define alloc_bootmem_node(ignore, x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages_node(ignore, x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages_node(ignore, x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
#define node_localnr(pfn, nid) ((pfn) - node_data[nid]->node_start_pfn)
/*
@ -121,29 +123,34 @@ static inline int pfn_valid(int pfn)
return (pfn < node_end_pfn(nid));
return 0;
}
#endif
extern int get_memcfg_numa_flat(void );
/*
* This allows any one NUMA architecture to be compiled
* for, and still fall back to the flat function if it
* fails.
*/
static inline void get_memcfg_numa(void)
{
#ifdef CONFIG_X86_NUMAQ
if (get_memcfg_numaq())
return;
#elif CONFIG_ACPI_SRAT
if (get_memcfg_from_srat())
return;
#endif
get_memcfg_numa_flat();
}
#endif /* CONFIG_X86_NUMAQ */
#endif /* CONFIG_DISCONTIGMEM */
#ifdef CONFIG_NEED_MULTIPLE_NODES
/*
* Following are macros that are specific to this numa platform.
*/
#define reserve_bootmem(addr, size) \
reserve_bootmem_node(NODE_DATA(0), (addr), (size))
#define alloc_bootmem(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, 0)
#define alloc_bootmem_pages(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages(x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
#define alloc_bootmem_node(ignore, x) \
__alloc_bootmem_node(NODE_DATA(0), (x), SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_pages_node(ignore, x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, __pa(MAX_DMA_ADDRESS))
#define alloc_bootmem_low_pages_node(ignore, x) \
__alloc_bootmem_node(NODE_DATA(0), (x), PAGE_SIZE, 0)
#endif /* CONFIG_NEED_MULTIPLE_NODES */
extern int early_pfn_to_nid(unsigned long pfn);
#endif /* _ASM_MMZONE_H_ */

4
include/asm-i386/page.h
View file

@ -137,11 +137,11 @@ extern int page_is_ram(unsigned long pagenr);
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
#ifndef CONFIG_DISCONTIGMEM
#ifdef CONFIG_FLATMEM
#define pfn_to_page(pfn) (mem_map + (pfn))
#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#endif /* !CONFIG_DISCONTIGMEM */
#endif /* CONFIG_FLATMEM */
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)

4
include/asm-i386/pgtable.h
View file

@ -398,9 +398,9 @@ extern void noexec_setup(const char *str);
#endif /* !__ASSEMBLY__ */
#ifndef CONFIG_DISCONTIGMEM
#ifdef CONFIG_FLATMEM
#define kern_addr_valid(addr) (1)
#endif /* !CONFIG_DISCONTIGMEM */
#endif /* CONFIG_FLATMEM */
#define io_remap_page_range(vma, vaddr, paddr, size, prot) \
remap_pfn_range(vma, vaddr, (paddr) >> PAGE_SHIFT, size, prot)

31
include/asm-i386/sparsemem.h Normal file
View file

@ -0,0 +1,31 @@
#ifndef _I386_SPARSEMEM_H
#define _I386_SPARSEMEM_H
#ifdef CONFIG_SPARSEMEM
/*
* generic non-linear memory support:
*
* 1) we will not split memory into more chunks than will fit into the
* flags field of the struct page
*/
/*
* SECTION_SIZE_BITS 2^N: how big each section will be
* MAX_PHYSADDR_BITS 2^N: how much physical address space we have
* MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space
*/
#ifdef CONFIG_X86_PAE
#define SECTION_SIZE_BITS 30
#define MAX_PHYSADDR_BITS 36
#define MAX_PHYSMEM_BITS 36
#else
#define SECTION_SIZE_BITS 26
#define MAX_PHYSADDR_BITS 32
#define MAX_PHYSMEM_BITS 32
#endif
/* XXX: FIXME -- wli */
#define kern_addr_valid(kaddr) (0)
#endif /* CONFIG_SPARSEMEM */
#endif /* _I386_SPARSEMEM_H */