printk("%d pages swap cached\n", cached);
}
+static void __init find_node_limits(int node, struct meminfo *mi,
+ unsigned long *min, unsigned long *max_low, unsigned long *max_high)
+{
+ int i;
+
+ *min = -1UL;
+ *max_low = *max_high = 0;
+
+ for_each_nodebank(i, mi, node) {
+ struct membank *bank = &mi->bank[i];
+ unsigned long start, end;
+
+ start = bank_pfn_start(bank);
+ end = bank_pfn_end(bank);
+
+ if (*min > start)
+ *min = start;
+ if (*max_high < end)
+ *max_high = end;
+ if (bank->highmem)
+ continue;
+ if (*max_low < end)
+ *max_low = end;
+ }
+}
+
/*
* FIXME: We really want to avoid allocating the bootmap bitmap
* over the top of the initrd. Hopefully, this is located towards
#endif
}
-static unsigned long __init bootmem_init_node(int node, struct meminfo *mi)
+static void __init bootmem_init_node(int node, struct meminfo *mi,
+ unsigned long start_pfn, unsigned long end_pfn)
{
- unsigned long start_pfn, end_pfn, boot_pfn;
+ unsigned long boot_pfn;
unsigned int boot_pages;
pg_data_t *pgdat;
int i;
- start_pfn = -1UL;
- end_pfn = 0;
-
/*
- * Calculate the pfn range, and map the memory banks for this node.
+ * Map the memory banks for this node.
*/
for_each_nodebank(i, mi, node) {
struct membank *bank = &mi->bank[i];
- unsigned long start, end;
- start = bank_pfn_start(bank);
- end = bank_pfn_end(bank);
-
- if (start_pfn > start)
- start_pfn = start;
- if (end_pfn < end)
- end_pfn = end;
-
- map_memory_bank(bank);
+ if (!bank->highmem)
+ map_memory_bank(bank);
}
- /*
- * If there is no memory in this node, ignore it.
- */
- if (end_pfn == 0)
- return end_pfn;
-
/*
* Allocate the bootmem bitmap page.
*/
for_each_nodebank(i, mi, node) {
struct membank *bank = &mi->bank[i];
- free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));
+ if (!bank->highmem)
+ free_bootmem_node(pgdat, bank_phys_start(bank), bank_phys_size(bank));
memory_present(node, bank_pfn_start(bank), bank_pfn_end(bank));
}
*/
reserve_bootmem_node(pgdat, boot_pfn << PAGE_SHIFT,
boot_pages << PAGE_SHIFT, BOOTMEM_DEFAULT);
-
- return end_pfn;
}
static void __init bootmem_reserve_initrd(int node)
static void __init bootmem_free_node(int node, struct meminfo *mi)
{
unsigned long zone_size[MAX_NR_ZONES], zhole_size[MAX_NR_ZONES];
- unsigned long start_pfn, end_pfn;
- pg_data_t *pgdat = NODE_DATA(node);
+ unsigned long min, max_low, max_high;
int i;
- start_pfn = pgdat->bdata->node_min_pfn;
- end_pfn = pgdat->bdata->node_low_pfn;
+ find_node_limits(node, mi, &min, &max_low, &max_high);
/*
* initialise the zones within this node.
*/
memset(zone_size, 0, sizeof(zone_size));
- memset(zhole_size, 0, sizeof(zhole_size));
/*
* The size of this node has already been determined. If we need
* to do anything fancy with the allocation of this memory to the
* zones, now is the time to do it.
*/
- zone_size[0] = end_pfn - start_pfn;
+ zone_size[0] = max_low - min;
+#ifdef CONFIG_HIGHMEM
+ zone_size[ZONE_HIGHMEM] = max_high - max_low;
+#endif
/*
* For each bank in this node, calculate the size of the holes.
* holes = node_size - sum(bank_sizes_in_node)
*/
- zhole_size[0] = zone_size[0];
- for_each_nodebank(i, mi, node)
- zhole_size[0] -= bank_pfn_size(&mi->bank[i]);
+ memcpy(zhole_size, zone_size, sizeof(zhole_size));
+ for_each_nodebank(i, mi, node) {
+ int idx = 0;
+#ifdef CONFIG_HIGHMEM
+ if (mi->bank[i].highmem)
+ idx = ZONE_HIGHMEM;
+#endif
+ zhole_size[idx] -= bank_pfn_size(&mi->bank[i]);
+ }
/*
* Adjust the sizes according to any special requirements for
*/
arch_adjust_zones(node, zone_size, zhole_size);
- free_area_init_node(node, zone_size, start_pfn, zhole_size);
+ free_area_init_node(node, zone_size, min, zhole_size);
}
void __init bootmem_init(void)
{
struct meminfo *mi = &meminfo;
- unsigned long memend_pfn = 0;
+ unsigned long min, max_low, max_high;
int node, initrd_node;
/*
*/
initrd_node = check_initrd(mi);
+ max_low = max_high = 0;
+
/*
* Run through each node initialising the bootmem allocator.
*/
for_each_node(node) {
- unsigned long end_pfn = bootmem_init_node(node, mi);
+ unsigned long node_low, node_high;
+
+ find_node_limits(node, mi, &min, &node_low, &node_high);
+
+ if (node_low > max_low)
+ max_low = node_low;
+ if (node_high > max_high)
+ max_high = node_high;
+
+ /*
+ * If there is no memory in this node, ignore it.
+ * (We can't have nodes which have no lowmem)
+ */
+ if (node_low == 0)
+ continue;
+
+ bootmem_init_node(node, mi, min, node_low);
/*
* Reserve any special node zero regions.
*/
if (node == initrd_node)
bootmem_reserve_initrd(node);
-
- /*
- * Remember the highest memory PFN.
- */
- if (end_pfn > memend_pfn)
- memend_pfn = end_pfn;
}
/*
for_each_node(node)
bootmem_free_node(node, mi);
- high_memory = __va((memend_pfn << PAGE_SHIFT) - 1) + 1;
+ high_memory = __va((max_low << PAGE_SHIFT) - 1) + 1;
/*
* This doesn't seem to be used by the Linux memory manager any
* Note: max_low_pfn and max_pfn reflect the number of _pages_ in
* the system, not the maximum PFN.
*/
- max_pfn = max_low_pfn = memend_pfn - PHYS_PFN_OFFSET;
+ max_low_pfn = max_low - PHYS_PFN_OFFSET;
+ max_pfn = max_high - PHYS_PFN_OFFSET;
}
static inline int free_area(unsigned long pfn, unsigned long end, char *s)
git.openpandora.org / pandora-kernel.git / blobdiff