From: "Martin J. Bligh" <Martin.Bligh@us.ibm.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Subject: [RFC] / [CFT] convert zone_start_paddr to zone_start_pfn
Date: Fri, 19 Apr 2002 17:15:43 -0700 [thread overview]
Message-ID: <2950000.1019261743@flay> (raw)
In-Reply-To: <1985660000.1019257493@flay>
At present we store zone_start_paddr as an unsigned long, which is
not correct - it may work for some architectures, but not for others
(eg ia32 with PAE, where a paddr is 36 bits and a ulong is 32).
Below is a (untested) patch to convert the paddr to a pfn. This patch
applies on top of the previous node_start_paddr, though there's only
one conflict, and it's easy to fix.
zone_start_pfn == zone_start_paddr >> PAGE_SHIFT
Comments ?
M.
diff -urN linux-2.5.8-node_start_paddr/arch/alpha/mm/numa.c linux-2.5.8-zone_start_paddr/arch/alpha/mm/numa.c
--- linux-2.5.8-node_start_paddr/arch/alpha/mm/numa.c Fri Apr 19 15:24:11 2002
+++ linux-2.5.8-zone_start_paddr/arch/alpha/mm/numa.c Fri Apr 19 16:50:20 2002
@@ -294,7 +294,7 @@
zones_size[ZONE_DMA] = dma_local_pfn;
zones_size[ZONE_NORMAL] = (end_pfn - start_pfn) - dma_local_pfn;
}
- free_area_init_node(nid, NODE_DATA(nid), NULL, zones_size, start_pfn<<PAGE_SHIFT, NULL);
+ free_area_init_node(nid, NODE_DATA(nid), NULL, zones_size, start_pfn, NULL);
lmax_mapnr = PLAT_NODE_DATA_STARTNR(nid) + PLAT_NODE_DATA_SIZE(nid);
if (lmax_mapnr > max_mapnr) {
max_mapnr = lmax_mapnr;
diff -urN linux-2.5.8-node_start_paddr/include/asm-alpha/pgtable.h linux-2.5.8-zone_start_paddr/include/asm-alpha/pgtable.h
--- linux-2.5.8-node_start_paddr/include/asm-alpha/pgtable.h Sun Apr 14 12:18:48 2002
+++ linux-2.5.8-zone_start_paddr/include/asm-alpha/pgtable.h Fri Apr 19 16:35:26 2002
@@ -194,8 +194,8 @@
#define PAGE_TO_PA(page) ((page - mem_map) << PAGE_SHIFT)
#else
#define PAGE_TO_PA(page) \
- ((((page)-(page)->zone->zone_mem_map) << PAGE_SHIFT) \
- + (page)->zone->zone_start_paddr)
+ (( ((page)-(page)->zone->zone_mem_map) \
+ + (page)->zone->zone_start_pfn) << PAGE_SHIFT)
#endif
#ifndef CONFIG_DISCONTIGMEM
@@ -214,7 +214,7 @@
unsigned long pfn; \
\
pfn = ((unsigned long)((page)-(page)->zone->zone_mem_map)) << 32; \
- pfn += (page)->zone->zone_start_paddr << (32-PAGE_SHIFT); \
+ pfn += (page)->zone->zone_start_pfn << 32; \
pte_val(pte) = pfn | pgprot_val(pgprot); \
\
pte; \
diff -urN linux-2.5.8-node_start_paddr/include/asm-mips64/pgtable.h linux-2.5.8-zone_start_paddr/include/asm-mips64/pgtable.h
--- linux-2.5.8-node_start_paddr/include/asm-mips64/pgtable.h Sun Apr 14 12:18:56 2002
+++ linux-2.5.8-zone_start_paddr/include/asm-mips64/pgtable.h Fri Apr 19 16:37:42 2002
@@ -484,8 +484,8 @@
#define PAGE_TO_PA(page) ((page - mem_map) << PAGE_SHIFT)
#else
#define PAGE_TO_PA(page) \
- ((((page)-(page)->zone->zone_mem_map) << PAGE_SHIFT) \
- + ((page)->zone->zone_start_paddr))
+ (( ((page)-(page)->zone->zone_mem_map) \
+ (page)->zone->zone_start_pfn) << PAGE_SHIFT)
#endif
#define mk_pte(page, pgprot) \
({ \
diff -urN linux-2.5.8-node_start_paddr/include/linux/mm.h linux-2.5.8-zone_start_paddr/include/linux/mm.h
--- linux-2.5.8-node_start_paddr/include/linux/mm.h Sun Apr 14 12:18:43 2002
+++ linux-2.5.8-zone_start_paddr/include/linux/mm.h Fri Apr 19 16:21:27 2002
@@ -363,8 +363,8 @@
#else /* CONFIG_HIGHMEM || WANT_PAGE_VIRTUAL */
#define page_address(page) \
- __va( (((page) - page_zone(page)->zone_mem_map) << PAGE_SHIFT) \
- + page_zone(page)->zone_start_paddr)
+ __va( ( ((page) - page_zone(page)->zone_mem_map) \
+ + page_zone(page)->zone_start_pfn) << PAGE_SHIFT)
#endif /* CONFIG_HIGHMEM || WANT_PAGE_VIRTUAL */
@@ -461,7 +461,7 @@
extern void free_area_init(unsigned long * zones_size);
extern void free_area_init_node(int nid, pg_data_t *pgdat, struct page *pmap,
- unsigned long * zones_size, unsigned long zone_start_paddr,
+ unsigned long * zones_size, unsigned long zone_start_pfn,
unsigned long *zholes_size);
extern void mem_init(void);
extern void show_mem(void);
diff -urN linux-2.5.8-node_start_paddr/include/linux/mmzone.h linux-2.5.8-zone_start_paddr/include/linux/mmzone.h
--- linux-2.5.8-node_start_paddr/include/linux/mmzone.h Fri Apr 19 15:23:28 2002
+++ linux-2.5.8-zone_start_paddr/include/linux/mmzone.h Fri Apr 19 16:23:42 2002
@@ -81,7 +81,8 @@
*/
struct pglist_data *zone_pgdat;
struct page *zone_mem_map;
- unsigned long zone_start_paddr;
+ /* zone_start_pfn == zone_start_paddr >> PAGE_SHIFT */
+ unsigned long zone_start_pfn;
unsigned long zone_start_mapnr;
/*
diff -urN linux-2.5.8-node_start_paddr/mm/highmem.c linux-2.5.8-zone_start_paddr/mm/highmem.c
--- linux-2.5.8-node_start_paddr/mm/highmem.c Sun Apr 14 12:18:44 2002
+++ linux-2.5.8-zone_start_paddr/mm/highmem.c Fri Apr 19 16:41:40 2002
@@ -379,7 +379,7 @@
/*
* is destination page below bounce pfn?
*/
- if ((page - page_zone(page)->zone_mem_map) + (page_zone(page)->zone_start_paddr >> PAGE_SHIFT) < pfn)
+ if ( ( (page - page_zone(page)->zone_mem_map) + page_zone(page)->zone_start_pfn ) < pfn)
continue;
/*
diff -urN linux-2.5.8-node_start_paddr/mm/numa.c linux-2.5.8-zone_start_paddr/mm/numa.c
--- linux-2.5.8-node_start_paddr/mm/numa.c Sun Apr 14 12:18:49 2002
+++ linux-2.5.8-zone_start_paddr/mm/numa.c Fri Apr 19 16:49:37 2002
@@ -22,11 +22,11 @@
* Should be invoked with paramters (0, 0, unsigned long *[], start_paddr).
*/
void __init free_area_init_node(int nid, pg_data_t *pgdat, struct page *pmap,
- unsigned long *zones_size, unsigned long zone_start_paddr,
+ unsigned long *zones_size, unsigned long zone_start_pfn,
unsigned long *zholes_size)
{
free_area_init_core(0, &contig_page_data, &mem_map, zones_size,
- zone_start_paddr, zholes_size, pmap);
+ zone_start_pfn, zholes_size, pmap);
}
#endif /* !CONFIG_DISCONTIGMEM */
@@ -59,7 +59,7 @@
* Nodes can be initialized parallely, in no particular order.
*/
void __init free_area_init_node(int nid, pg_data_t *pgdat, struct page *pmap,
- unsigned long *zones_size, unsigned long zone_start_paddr,
+ unsigned long *zones_size, unsigned long zone_start_pfn,
unsigned long *zholes_size)
{
int i, size = 0;
@@ -68,7 +68,7 @@
if (mem_map == (mem_map_t *)NULL)
mem_map = (mem_map_t *)PAGE_OFFSET;
- free_area_init_core(nid, pgdat, &discard, zones_size, zone_start_paddr,
+ free_area_init_core(nid, pgdat, &discard, zones_size, zone_start_pfn,
zholes_size, pmap);
pgdat->node_id = nid;
diff -urN linux-2.5.8-node_start_paddr/mm/page_alloc.c linux-2.5.8-zone_start_paddr/mm/page_alloc.c
--- linux-2.5.8-node_start_paddr/mm/page_alloc.c Fri Apr 19 15:32:01 2002
+++ linux-2.5.8-zone_start_paddr/mm/page_alloc.c Fri Apr 19 16:55:43 2002
@@ -705,7 +705,7 @@
* - clear the memory bitmaps
*/
void __init free_area_init_core(int nid, pg_data_t *pgdat, struct page **gmap,
- unsigned long *zones_size, unsigned long zone_start_paddr,
+ unsigned long *zones_size, unsigned long zone_start_pfn,
unsigned long *zholes_size, struct page *lmem_map)
{
unsigned long i, j;
@@ -713,9 +713,6 @@
unsigned long totalpages, offset, realtotalpages;
const unsigned long zone_required_alignment = 1UL << (MAX_ORDER-1);
- if (zone_start_paddr & ~PAGE_MASK)
- BUG();
-
totalpages = 0;
for (i = 0; i < MAX_NR_ZONES; i++) {
unsigned long size = zones_size[i];
@@ -746,7 +743,7 @@
}
*gmap = pgdat->node_mem_map = lmem_map;
pgdat->node_size = totalpages;
- pgdat->node_start_pfn = zone_start_paddr >> PAGE_SHIFT;
+ pgdat->node_start_pfn = zone_start_pfn;
pgdat->node_start_mapnr = (lmem_map - mem_map);
pgdat->nr_zones = 0;
@@ -798,9 +795,9 @@
zone->zone_mem_map = mem_map + offset;
zone->zone_start_mapnr = offset;
- zone->zone_start_paddr = zone_start_paddr;
+ zone->zone_start_pfn = zone_start_pfn;
- if ((zone_start_paddr >> PAGE_SHIFT) & (zone_required_alignment-1))
+ if ((zone_start_pfn) & (zone_required_alignment-1))
printk("BUG: wrong zone alignment, it will crash\n");
/*
@@ -815,8 +812,9 @@
__SetPageReserved(page);
memlist_init(&page->list);
if (j != ZONE_HIGHMEM)
- set_page_address(page, __va(zone_start_paddr));
- zone_start_paddr += PAGE_SIZE;
+ /* WARNING - this looks dangerous, could overflow */
+ set_page_address(page, __va(zone_start_pfn << PAGE_SHIFT));
+ zone_start_pfn++;
}
offset += size;
prev parent reply other threads:[~2002-04-19 23:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-19 23:04 [RFC] / [CFT] convert node_start_paddr to node_start_pfn Martin J. Bligh
2002-04-20 0:15 ` Martin J. Bligh [this message]
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