if (unlikely(bootmem_debug)) \
printk(KERN_INFO \
"bootmem::%s " fmt, \
- __FUNCTION__, ## args); \
+ __func__, ## args); \
})
static unsigned long __init bootmap_bytes(unsigned long pages)
bootmem_data_t *ent;
ent = list_entry(iter, bootmem_data_t, list);
- if (bdata->node_boot_start < ent->node_boot_start)
+ if (bdata->node_min_pfn < ent->node_min_pfn)
break;
}
list_add_tail(&bdata->list, iter);
mminit_validate_memmodel_limits(&start, &end);
bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart));
- bdata->node_boot_start = PFN_PHYS(start);
+ bdata->node_min_pfn = start;
bdata->node_low_pfn = end;
link_bootmem(bdata);
if (!bdata->node_bootmem_map)
return 0;
- start = PFN_DOWN(bdata->node_boot_start);
+ start = bdata->node_min_pfn;
end = bdata->node_low_pfn;
/*
unsigned long *map, idx, vec;
map = bdata->node_bootmem_map;
- idx = start - PFN_DOWN(bdata->node_boot_start);
+ idx = start - bdata->node_min_pfn;
vec = ~map[idx / BITS_PER_LONG];
if (aligned && vec == ~0UL && start + BITS_PER_LONG < end) {
}
page = virt_to_page(bdata->node_bootmem_map);
- pages = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
+ pages = bdata->node_low_pfn - bdata->node_min_pfn;
pages = bootmem_bootmap_pages(pages);
count += pages;
while (pages--)
unsigned long idx;
bdebug("nid=%td start=%lx end=%lx\n", bdata - bootmem_node_data,
- sidx + PFN_DOWN(bdata->node_boot_start),
- eidx + PFN_DOWN(bdata->node_boot_start));
+ sidx + bdata->node_min_pfn,
+ eidx + bdata->node_min_pfn);
+
+ if (bdata->hint_idx > sidx)
+ bdata->hint_idx = sidx;
for (idx = sidx; idx < eidx; idx++)
if (!test_and_clear_bit(idx, bdata->node_bootmem_map))
bdebug("nid=%td start=%lx end=%lx flags=%x\n",
bdata - bootmem_node_data,
- sidx + PFN_DOWN(bdata->node_boot_start),
- eidx + PFN_DOWN(bdata->node_boot_start),
+ sidx + bdata->node_min_pfn,
+ eidx + bdata->node_min_pfn,
flags);
for (idx = sidx; idx < eidx; idx++)
return -EBUSY;
}
bdebug("silent double reserve of PFN %lx\n",
- idx + PFN_DOWN(bdata->node_boot_start));
+ idx + bdata->node_min_pfn);
}
return 0;
}
-static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
- unsigned long size)
+static int __init mark_bootmem_node(bootmem_data_t *bdata,
+ unsigned long start, unsigned long end,
+ int reserve, int flags)
{
unsigned long sidx, eidx;
- unsigned long i;
- BUG_ON(!size);
+ bdebug("nid=%td start=%lx end=%lx reserve=%d flags=%x\n",
+ bdata - bootmem_node_data, start, end, reserve, flags);
- /* out range */
- if (addr + size < bdata->node_boot_start ||
- PFN_DOWN(addr) > bdata->node_low_pfn)
- return;
- /*
- * round down end of usable mem, partially free pages are
- * considered reserved.
- */
+ BUG_ON(start < bdata->node_min_pfn);
+ BUG_ON(end > bdata->node_low_pfn);
- if (addr >= bdata->node_boot_start &&
- PFN_DOWN(addr - bdata->node_boot_start) < bdata->hint_idx)
- bdata->hint_idx = PFN_DOWN(addr - bdata->node_boot_start);
+ sidx = start - bdata->node_min_pfn;
+ eidx = end - bdata->node_min_pfn;
- /*
- * Round up to index to the range.
- */
- if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
- sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
+ if (reserve)
+ return __reserve(bdata, sidx, eidx, flags);
else
- sidx = 0;
+ __free(bdata, sidx, eidx);
+ return 0;
+}
- eidx = PFN_DOWN(addr + size - bdata->node_boot_start);
- if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
- eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
+static int __init mark_bootmem(unsigned long start, unsigned long end,
+ int reserve, int flags)
+{
+ unsigned long pos;
+ bootmem_data_t *bdata;
- __free(bdata, sidx, eidx);
+ pos = start;
+ list_for_each_entry(bdata, &bdata_list, list) {
+ int err;
+ unsigned long max;
+
+ if (pos < bdata->node_min_pfn ||
+ pos >= bdata->node_low_pfn) {
+ BUG_ON(pos != start);
+ continue;
+ }
+
+ max = min(bdata->node_low_pfn, end);
+
+ err = mark_bootmem_node(bdata, pos, max, reserve, flags);
+ if (reserve && err) {
+ mark_bootmem(start, pos, 0, 0);
+ return err;
+ }
+
+ if (max == end)
+ return 0;
+ pos = bdata->node_low_pfn;
+ }
+ BUG();
}
/**
*
* Partial pages will be considered reserved and left as they are.
*
- * Only physical pages that actually reside on @pgdat are marked.
+ * The range must reside completely on the specified node.
*/
void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
unsigned long size)
{
- free_bootmem_core(pgdat->bdata, physaddr, size);
+ unsigned long start, end;
+
+ start = PFN_UP(physaddr);
+ end = PFN_DOWN(physaddr + size);
+
+ mark_bootmem_node(pgdat->bdata, start, end, 0, 0);
}
/**
*
* Partial pages will be considered reserved and left as they are.
*
- * All physical pages within the range are marked, no matter what
- * node they reside on.
+ * The range must be contiguous but may span node boundaries.
*/
void __init free_bootmem(unsigned long addr, unsigned long size)
{
- bootmem_data_t *bdata;
- list_for_each_entry(bdata, &bdata_list, list)
- free_bootmem_core(bdata, addr, size);
-}
-
-/*
- * Marks a particular physical memory range as unallocatable. Usable RAM
- * might be used for boot-time allocations - or it might get added
- * to the free page pool later on.
- */
-static int __init can_reserve_bootmem_core(bootmem_data_t *bdata,
- unsigned long addr, unsigned long size, int flags)
-{
- unsigned long sidx, eidx;
- unsigned long i;
-
- BUG_ON(!size);
-
- /* out of range, don't hold other */
- if (addr + size < bdata->node_boot_start ||
- PFN_DOWN(addr) > bdata->node_low_pfn)
- return 0;
-
- /*
- * Round up to index to the range.
- */
- if (addr > bdata->node_boot_start)
- sidx= PFN_DOWN(addr - bdata->node_boot_start);
- else
- sidx = 0;
-
- eidx = PFN_UP(addr + size - bdata->node_boot_start);
- if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
- eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
-
- for (i = sidx; i < eidx; i++) {
- if (test_bit(i, bdata->node_bootmem_map)) {
- if (flags & BOOTMEM_EXCLUSIVE)
- return -EBUSY;
- }
- }
-
- return 0;
-
-}
-
-static void __init reserve_bootmem_core(bootmem_data_t *bdata,
- unsigned long addr, unsigned long size, int flags)
-{
- unsigned long sidx, eidx;
- unsigned long i;
+ unsigned long start, end;
- BUG_ON(!size);
+ start = PFN_UP(addr);
+ end = PFN_DOWN(addr + size);
- /* out of range */
- if (addr + size < bdata->node_boot_start ||
- PFN_DOWN(addr) > bdata->node_low_pfn)
- return;
-
- /*
- * Round up to index to the range.
- */
- if (addr > bdata->node_boot_start)
- sidx= PFN_DOWN(addr - bdata->node_boot_start);
- else
- sidx = 0;
-
- eidx = PFN_UP(addr + size - bdata->node_boot_start);
- if (eidx > bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start))
- eidx = bdata->node_low_pfn - PFN_DOWN(bdata->node_boot_start);
-
- return __reserve(bdata, sidx, eidx, flags);
+ mark_bootmem(start, end, 0, 0);
}
/**
*
* Partial pages will be reserved.
*
- * Only physical pages that actually reside on @pgdat are marked.
+ * The range must reside completely on the specified node.
*/
int __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
unsigned long size, int flags)
{
- int ret;
+ unsigned long start, end;
- ret = can_reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
- if (ret < 0)
- return -ENOMEM;
- reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
- return 0;
+ start = PFN_DOWN(physaddr);
+ end = PFN_UP(physaddr + size);
+
+ return mark_bootmem_node(pgdat->bdata, start, end, 1, flags);
}
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
*
* Partial pages will be reserved.
*
- * All physical pages within the range are marked, no matter what
- * node they reside on.
+ * The range must be contiguous but may span node boundaries.
*/
int __init reserve_bootmem(unsigned long addr, unsigned long size,
int flags)
{
- bootmem_data_t *bdata;
- int ret;
+ unsigned long start, end;
- list_for_each_entry(bdata, &bdata_list, list) {
- ret = can_reserve_bootmem_core(bdata, addr, size, flags);
- if (ret < 0)
- return ret;
- }
- list_for_each_entry(bdata, &bdata_list, list)
- reserve_bootmem_core(bdata, addr, size, flags);
+ start = PFN_DOWN(addr);
+ end = PFN_UP(addr + size);
- return 0;
+ return mark_bootmem(start, end, 1, flags);
}
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
+static unsigned long align_idx(struct bootmem_data *bdata, unsigned long idx,
+ unsigned long step)
+{
+ unsigned long base = bdata->node_min_pfn;
+
+ /*
+ * Align the index with respect to the node start so that the
+ * combination of both satisfies the requested alignment.
+ */
+
+ return ALIGN(base + idx, step) - base;
+}
+
+static unsigned long align_off(struct bootmem_data *bdata, unsigned long off,
+ unsigned long align)
+{
+ unsigned long base = PFN_PHYS(bdata->node_min_pfn);
+
+ /* Same as align_idx for byte offsets */
+
+ return ALIGN(base + off, align) - base;
+}
+
static void * __init alloc_bootmem_core(struct bootmem_data *bdata,
unsigned long size, unsigned long align,
unsigned long goal, unsigned long limit)
{
+ unsigned long fallback = 0;
unsigned long min, max, start, sidx, midx, step;
+ bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n",
+ bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT,
+ align, goal, limit);
+
BUG_ON(!size);
BUG_ON(align & (align - 1));
BUG_ON(limit && goal + size > limit);
if (!bdata->node_bootmem_map)
return NULL;
- bdebug("nid=%td size=%lx [%lu pages] align=%lx goal=%lx limit=%lx\n",
- bdata - bootmem_node_data, size, PAGE_ALIGN(size) >> PAGE_SHIFT,
- align, goal, limit);
-
- min = PFN_DOWN(bdata->node_boot_start);
+ min = bdata->node_min_pfn;
max = bdata->node_low_pfn;
goal >>= PAGE_SHIFT;
else
start = ALIGN(min, step);
- sidx = start - PFN_DOWN(bdata->node_boot_start);
- midx = max - PFN_DOWN(bdata->node_boot_start);
+ sidx = start - bdata->node_min_pfn;
+ midx = max - bdata->node_min_pfn;
if (bdata->hint_idx > sidx) {
- /* Make sure we retry on failure */
- goal = 1;
- sidx = ALIGN(bdata->hint_idx, step);
+ /*
+ * Handle the valid case of sidx being zero and still
+ * catch the fallback below.
+ */
+ fallback = sidx + 1;
+ sidx = align_idx(bdata, bdata->hint_idx, step);
}
while (1) {
unsigned long eidx, i, start_off, end_off;
find_block:
sidx = find_next_zero_bit(bdata->node_bootmem_map, midx, sidx);
- sidx = ALIGN(sidx, step);
+ sidx = align_idx(bdata, sidx, step);
eidx = sidx + PFN_UP(size);
if (sidx >= midx || eidx > midx)
for (i = sidx; i < eidx; i++)
if (test_bit(i, bdata->node_bootmem_map)) {
- sidx = ALIGN(i, step);
+ sidx = align_idx(bdata, i, step);
if (sidx == i)
sidx += step;
goto find_block;
}
- if (bdata->last_end_off &&
+ if (bdata->last_end_off & (PAGE_SIZE - 1) &&
PFN_DOWN(bdata->last_end_off) + 1 == sidx)
- start_off = ALIGN(bdata->last_end_off, align);
+ start_off = align_off(bdata, bdata->last_end_off, align);
else
start_off = PFN_PHYS(sidx);
PFN_UP(end_off), BOOTMEM_EXCLUSIVE))
BUG();
- region = phys_to_virt(bdata->node_boot_start + start_off);
+ region = phys_to_virt(PFN_PHYS(bdata->node_min_pfn) +
+ start_off);
memset(region, 0, size);
return region;
}
+ if (fallback) {
+ sidx = align_idx(bdata, fallback - 1, step);
+ fallback = 0;
+ goto find_block;
+ }
+
+ return NULL;
+}
+
+static void * __init ___alloc_bootmem_nopanic(unsigned long size,
+ unsigned long align,
+ unsigned long goal,
+ unsigned long limit)
+{
+ bootmem_data_t *bdata;
+
+restart:
+ list_for_each_entry(bdata, &bdata_list, list) {
+ void *region;
+
+ if (goal && bdata->node_low_pfn <= PFN_DOWN(goal))
+ continue;
+ if (limit && bdata->node_min_pfn >= PFN_DOWN(limit))
+ break;
+
+ region = alloc_bootmem_core(bdata, size, align, goal, limit);
+ if (region)
+ return region;
+ }
+
if (goal) {
goal = 0;
- sidx = 0;
- goto find_block;
+ goto restart;
}
return NULL;
* Returns NULL on failure.
*/
void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align,
- unsigned long goal)
+ unsigned long goal)
{
- bootmem_data_t *bdata;
- void *ptr;
+ return ___alloc_bootmem_nopanic(size, align, goal, 0);
+}
- list_for_each_entry(bdata, &bdata_list, list) {
- ptr = alloc_bootmem_core(bdata, size, align, goal, 0);
- if (ptr)
- return ptr;
- }
+static void * __init ___alloc_bootmem(unsigned long size, unsigned long align,
+ unsigned long goal, unsigned long limit)
+{
+ void *mem = ___alloc_bootmem_nopanic(size, align, goal, limit);
+
+ if (mem)
+ return mem;
+ /*
+ * Whoops, we cannot satisfy the allocation request.
+ */
+ printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
+ panic("Out of memory");
return NULL;
}
void * __init __alloc_bootmem(unsigned long size, unsigned long align,
unsigned long goal)
{
- void *mem = __alloc_bootmem_nopanic(size,align,goal);
+ return ___alloc_bootmem(size, align, goal, 0);
+}
+
+static void * __init ___alloc_bootmem_node(bootmem_data_t *bdata,
+ unsigned long size, unsigned long align,
+ unsigned long goal, unsigned long limit)
+{
+ void *ptr;
- if (mem)
- return mem;
- /*
- * Whoops, we cannot satisfy the allocation request.
- */
- printk(KERN_ALERT "bootmem alloc of %lu bytes failed!\n", size);
- panic("Out of memory");
- return NULL;
+ ptr = alloc_bootmem_core(bdata, size, align, goal, limit);
+ if (ptr)
+ return ptr;
+
+ return ___alloc_bootmem(size, align, goal, limit);
}
/**
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, 0);
- if (ptr)
- return ptr;
-
- return __alloc_bootmem(size, align, goal);
+ return ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
}
#ifdef CONFIG_SPARSEMEM
void * __init alloc_bootmem_section(unsigned long size,
unsigned long section_nr)
{
- void *ptr;
- unsigned long limit, goal, start_nr, end_nr, pfn;
- struct pglist_data *pgdat;
+ bootmem_data_t *bdata;
+ unsigned long pfn, goal, limit;
pfn = section_nr_to_pfn(section_nr);
- goal = PFN_PHYS(pfn);
- limit = PFN_PHYS(section_nr_to_pfn(section_nr + 1)) - 1;
- pgdat = NODE_DATA(early_pfn_to_nid(pfn));
- ptr = alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, goal,
- limit);
+ goal = pfn << PAGE_SHIFT;
+ limit = section_nr_to_pfn(section_nr + 1) << PAGE_SHIFT;
+ bdata = &bootmem_node_data[early_pfn_to_nid(pfn)];
- if (!ptr)
- return NULL;
-
- start_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr)));
- end_nr = pfn_to_section_nr(PFN_DOWN(__pa(ptr) + size));
- if (start_nr != section_nr || end_nr != section_nr) {
- printk(KERN_WARNING "alloc_bootmem failed on section %ld.\n",
- section_nr);
- free_bootmem_core(pgdat->bdata, __pa(ptr), size);
- ptr = NULL;
- }
-
- return ptr;
+ return alloc_bootmem_core(bdata, size, SMP_CACHE_BYTES, goal, limit);
}
#endif
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) {
- ptr = alloc_bootmem_core(bdata, size, align, goal,
- ARCH_LOW_ADDRESS_LIMIT);
- if (ptr)
- 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;
+ return ___alloc_bootmem(size, align, goal, ARCH_LOW_ADDRESS_LIMIT);
}
/**
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,
- ARCH_LOW_ADDRESS_LIMIT);
+ return ___alloc_bootmem_node(pgdat->bdata, size, align,
+ goal, ARCH_LOW_ADDRESS_LIMIT);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff