* dma_get_required_mask(), which uses
* it, can be an inline function */
+static LIST_HEAD(bdata_list);
+#ifdef CONFIG_CRASH_DUMP
+/*
+ * If we have booted due to a crash, max_pfn will be a very low value. We need
+ * to know the amount of memory that the previous kernel used.
+ */
+unsigned long saved_max_pfn;
+#endif
+
/* return the number of _pages_ that will be allocated for the boot bitmap */
unsigned long __init bootmem_bootmap_pages (unsigned long pages)
{
return mapsize;
}
+/*
+ * link bdata in order
+ */
+static void link_bootmem(bootmem_data_t *bdata)
+{
+ bootmem_data_t *ent;
+ if (list_empty(&bdata_list)) {
+ list_add(&bdata->list, &bdata_list);
+ return;
+ }
+ /* insert in order */
+ list_for_each_entry(ent, &bdata_list, list) {
+ if (bdata->node_boot_start < ent->node_boot_start) {
+ list_add_tail(&bdata->list, &ent->list);
+ return;
+ }
+ }
+ list_add_tail(&bdata->list, &bdata_list);
+ return;
+}
+
/*
* Called once to set up the allocator itself.
bootmem_data_t *bdata = pgdat->bdata;
unsigned long mapsize = ((end - start)+7)/8;
- pgdat->pgdat_next = pgdat_list;
- pgdat_list = pgdat;
-
- mapsize = (mapsize + (sizeof(long) - 1UL)) & ~(sizeof(long) - 1UL);
+ mapsize = ALIGN(mapsize, sizeof(long));
bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT);
bdata->node_boot_start = (start << PAGE_SHIFT);
bdata->node_low_pfn = end;
+ link_bootmem(bdata);
/*
* Initially all pages are reserved - setup_arch() has to
*
* NOTE: This function is _not_ reentrant.
*/
-static void * __init
+void * __init
__alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size,
- unsigned long align, unsigned long goal)
+ unsigned long align, unsigned long goal, unsigned long limit)
{
unsigned long offset, remaining_size, areasize, preferred;
- unsigned long i, start = 0, incr, eidx;
+ unsigned long i, start = 0, incr, eidx, end_pfn = bdata->node_low_pfn;
void *ret;
if(!size) {
}
BUG_ON(align & (align-1));
- eidx = bdata->node_low_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
+ if (limit && bdata->node_boot_start >= limit)
+ return NULL;
+
+ limit >>=PAGE_SHIFT;
+ if (limit && end_pfn > limit)
+ end_pfn = limit;
+
+ eidx = end_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
offset = 0;
if (align &&
(bdata->node_boot_start & (align - 1UL)) != 0)
* first, then we try to allocate lower pages.
*/
if (goal && (goal >= bdata->node_boot_start) &&
- ((goal >> PAGE_SHIFT) < bdata->node_low_pfn)) {
+ ((goal >> PAGE_SHIFT) < end_pfn)) {
preferred = goal - bdata->node_boot_start;
if (bdata->last_success >= preferred)
- preferred = bdata->last_success;
+ if (!limit || (limit && limit > bdata->last_success))
+ preferred = bdata->last_success;
} else
preferred = 0;
- preferred = ((preferred + align - 1) & ~(align - 1)) >> PAGE_SHIFT;
+ preferred = ALIGN(preferred, align) >> PAGE_SHIFT;
preferred += offset;
areasize = (size+PAGE_SIZE-1)/PAGE_SIZE;
incr = align >> PAGE_SHIFT ? : 1;
unsigned long j;
i = find_next_zero_bit(bdata->node_bootmem_map, eidx, i);
i = ALIGN(i, incr);
+ if (i >= eidx)
+ break;
if (test_bit(i, bdata->node_bootmem_map))
continue;
for (j = i + 1; j < i + areasize; ++j) {
*/
if (align < PAGE_SIZE &&
bdata->last_offset && bdata->last_pos+1 == start) {
- offset = (bdata->last_offset+align-1) & ~(align-1);
+ offset = ALIGN(bdata->last_offset, align);
BUG_ON(offset > PAGE_SIZE);
remaining_size = PAGE_SIZE-offset;
if (size < remaining_size) {
static unsigned long __init free_all_bootmem_core(pg_data_t *pgdat)
{
struct page *page;
+ unsigned long pfn;
bootmem_data_t *bdata = pgdat->bdata;
unsigned long i, count, total = 0;
unsigned long idx;
count = 0;
/* first extant page of the node */
- page = virt_to_page(phys_to_virt(bdata->node_boot_start));
+ pfn = bdata->node_boot_start >> PAGE_SHIFT;
idx = bdata->node_low_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
map = bdata->node_bootmem_map;
/* Check physaddr is O(LOG2(BITS_PER_LONG)) page aligned */
gofast = 1;
for (i = 0; i < idx; ) {
unsigned long v = ~map[i / BITS_PER_LONG];
+
if (gofast && v == ~0UL) {
- int j, order;
+ int order;
+ page = pfn_to_page(pfn);
count += BITS_PER_LONG;
- __ClearPageReserved(page);
order = ffs(BITS_PER_LONG) - 1;
- set_page_refs(page, order);
- for (j = 1; j < BITS_PER_LONG; j++) {
- if (j + 16 < BITS_PER_LONG)
- prefetchw(page + j + 16);
- __ClearPageReserved(page + j);
- }
- __free_pages(page, order);
+ __free_pages_bootmem(page, order);
i += BITS_PER_LONG;
page += BITS_PER_LONG;
} else if (v) {
unsigned long m;
+
+ page = pfn_to_page(pfn);
for (m = 1; m && i < idx; m<<=1, page++, i++) {
if (v & m) {
count++;
- __ClearPageReserved(page);
- set_page_refs(page, 0);
- __free_page(page);
+ __free_pages_bootmem(page, 0);
}
}
} else {
i+=BITS_PER_LONG;
- page += BITS_PER_LONG;
}
+ pfn += BITS_PER_LONG;
}
total += count;
count = 0;
for (i = 0; i < ((bdata->node_low_pfn-(bdata->node_boot_start >> PAGE_SHIFT))/8 + PAGE_SIZE-1)/PAGE_SIZE; i++,page++) {
count++;
- __ClearPageReserved(page);
- set_page_count(page, 1);
- __free_page(page);
+ __free_pages_bootmem(page, 0);
}
total += count;
bdata->node_bootmem_map = NULL;
return(free_all_bootmem_core(NODE_DATA(0)));
}
-void * __init __alloc_bootmem (unsigned long size, unsigned long align, unsigned long goal)
+void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, unsigned long goal)
{
- pg_data_t *pgdat = pgdat_list;
+ bootmem_data_t *bdata;
void *ptr;
- for_each_pgdat(pgdat)
- if ((ptr = __alloc_bootmem_core(pgdat->bdata, size,
- align, goal)))
+ list_for_each_entry(bdata, &bdata_list, list)
+ if ((ptr = __alloc_bootmem_core(bdata, size, align, goal, 0)))
return(ptr);
+ return NULL;
+}
+void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal)
+{
+ void *mem = __alloc_bootmem_nopanic(size,align,goal);
+ if (mem)
+ return mem;
/*
* Whoops, we cannot satisfy the allocation request.
*/
return NULL;
}
-void * __init __alloc_bootmem_node (pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal)
+
+void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size, unsigned long align,
+ unsigned long goal)
{
void *ptr;
- ptr = __alloc_bootmem_core(pgdat->bdata, size, align, goal);
+ ptr = __alloc_bootmem_core(pgdat->bdata, size, align, goal, 0);
if (ptr)
return (ptr);
return __alloc_bootmem(size, align, goal);
}
+#define LOW32LIMIT 0xffffffff
+
+void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, unsigned long goal)
+{
+ bootmem_data_t *bdata;
+ void *ptr;
+
+ list_for_each_entry(bdata, &bdata_list, list)
+ if ((ptr = __alloc_bootmem_core(bdata, size,
+ align, goal, LOW32LIMIT)))
+ return(ptr);
+
+ /*
+ * Whoops, we cannot satisfy the allocation request.
+ */
+ printk(KERN_ALERT "low bootmem alloc of %lu bytes failed!\n", size);
+ panic("Out of low memory");
+ return NULL;
+}
+
+void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
+ unsigned long align, unsigned long goal)
+{
+ return __alloc_bootmem_core(pgdat->bdata, size, align, goal, LOW32LIMIT);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff