* free memory collector. It's used to deal with reserved
* system memory and memory holes as well.
*/
-
-#include <linux/mm.h>
-#include <linux/kernel_stat.h>
-#include <linux/swap.h>
-#include <linux/interrupt.h>
#include <linux/init.h>
+#include <linux/pfn.h>
#include <linux/bootmem.h>
-#include <linux/mmzone.h>
#include <linux/module.h>
-#include <asm/dma.h>
+
+#include <asm/bug.h>
#include <asm/io.h>
+#include <asm/processor.h>
+
#include "internal.h"
/*
unsigned long min_low_pfn;
unsigned long max_pfn;
-EXPORT_UNUSED_SYMBOL(max_pfn); /* June 2006 */
-
static LIST_HEAD(bdata_list);
#ifdef CONFIG_CRASH_DUMP
/*
#endif
/* return the number of _pages_ that will be allocated for the boot bitmap */
-unsigned long __init bootmem_bootmap_pages (unsigned long pages)
+unsigned long __init bootmem_bootmap_pages(unsigned long pages)
{
unsigned long mapsize;
return mapsize;
}
+
/*
* link bdata in order
*/
-static void link_bootmem(bootmem_data_t *bdata)
+static void __init link_bootmem(bootmem_data_t *bdata)
{
bootmem_data_t *ent;
+
if (list_empty(&bdata_list)) {
list_add(&bdata->list, &bdata_list);
return;
}
}
list_add_tail(&bdata->list, &bdata_list);
- return;
}
+/*
+ * Given an initialised bdata, it returns the size of the boot bitmap
+ */
+static unsigned long __init get_mapsize(bootmem_data_t *bdata)
+{
+ unsigned long mapsize;
+ unsigned long start = PFN_DOWN(bdata->node_boot_start);
+ unsigned long end = bdata->node_low_pfn;
+
+ mapsize = ((end - start) + 7) / 8;
+ return ALIGN(mapsize, sizeof(long));
+}
/*
* Called once to set up the allocator itself.
*/
-static unsigned long __init init_bootmem_core (pg_data_t *pgdat,
+static unsigned long __init init_bootmem_core(pg_data_t *pgdat,
unsigned long mapstart, unsigned long start, unsigned long end)
{
bootmem_data_t *bdata = pgdat->bdata;
- unsigned long mapsize = ((end - start)+7)/8;
+ unsigned long mapsize;
- mapsize = ALIGN(mapsize, sizeof(long));
- bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT);
- bdata->node_boot_start = (start << PAGE_SHIFT);
+ bdata->node_bootmem_map = phys_to_virt(PFN_PHYS(mapstart));
+ bdata->node_boot_start = PFN_PHYS(start);
bdata->node_low_pfn = end;
link_bootmem(bdata);
* Initially all pages are reserved - setup_arch() has to
* register free RAM areas explicitly.
*/
+ mapsize = get_mapsize(bdata);
memset(bdata->node_bootmem_map, 0xff, mapsize);
return mapsize;
* might be used for boot-time allocations - or it might get added
* to the free page pool later on.
*/
-static void __init reserve_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long size)
+static int __init reserve_bootmem_core(bootmem_data_t *bdata,
+ unsigned long addr, unsigned long size, int flags)
{
+ unsigned long sidx, eidx;
unsigned long i;
+ int ret;
+
/*
* round up, partially reserved pages are considered
* fully reserved.
*/
- unsigned long sidx = (addr - bdata->node_boot_start)/PAGE_SIZE;
- unsigned long eidx = (addr + size - bdata->node_boot_start +
- PAGE_SIZE-1)/PAGE_SIZE;
- unsigned long end = (addr + size + PAGE_SIZE-1)/PAGE_SIZE;
-
BUG_ON(!size);
- BUG_ON(sidx >= eidx);
- BUG_ON((addr >> PAGE_SHIFT) >= bdata->node_low_pfn);
- BUG_ON(end > bdata->node_low_pfn);
+ BUG_ON(PFN_DOWN(addr) >= bdata->node_low_pfn);
+ BUG_ON(PFN_UP(addr + size) > bdata->node_low_pfn);
+ BUG_ON(addr < bdata->node_boot_start);
+
+ sidx = PFN_DOWN(addr - bdata->node_boot_start);
+ eidx = PFN_UP(addr + size - bdata->node_boot_start);
for (i = sidx; i < eidx; i++)
if (test_and_set_bit(i, bdata->node_bootmem_map)) {
#ifdef CONFIG_DEBUG_BOOTMEM
printk("hm, page %08lx reserved twice.\n", i*PAGE_SIZE);
#endif
+ if (flags & BOOTMEM_EXCLUSIVE) {
+ ret = -EBUSY;
+ goto err;
+ }
}
+
+ return 0;
+
+err:
+ /* unreserve memory we accidentally reserved */
+ for (i--; i >= sidx; i--)
+ clear_bit(i, bdata->node_bootmem_map);
+
+ return ret;
}
-static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, unsigned long size)
+static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr,
+ unsigned long size)
{
+ unsigned long sidx, eidx;
unsigned long i;
- unsigned long start;
+
+ BUG_ON(!size);
+
+ /* 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.
*/
- unsigned long sidx;
- unsigned long eidx = (addr + size - bdata->node_boot_start)/PAGE_SIZE;
- unsigned long end = (addr + size)/PAGE_SIZE;
-
- BUG_ON(!size);
- BUG_ON(end > bdata->node_low_pfn);
- if (addr < bdata->last_success)
+ if (addr >= bdata->node_boot_start && addr < bdata->last_success)
bdata->last_success = addr;
/*
- * Round up the beginning of the address.
+ * Round up to index to the range.
*/
- start = (addr + PAGE_SIZE-1) / PAGE_SIZE;
- sidx = start - (bdata->node_boot_start/PAGE_SIZE);
+ if (PFN_UP(addr) > PFN_DOWN(bdata->node_boot_start))
+ sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
+ else
+ sidx = 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);
for (i = sidx; i < eidx; i++) {
if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
unsigned long align, unsigned long goal, unsigned long limit)
{
unsigned long offset, remaining_size, areasize, preferred;
- unsigned long i, start = 0, incr, eidx, end_pfn = bdata->node_low_pfn;
+ unsigned long i, start = 0, incr, eidx, end_pfn;
void *ret;
- if(!size) {
+ if (!size) {
printk("__alloc_bootmem_core(): zero-sized request\n");
BUG();
}
if (limit && bdata->node_boot_start >= limit)
return NULL;
- limit >>=PAGE_SHIFT;
+ /* on nodes without memory - bootmem_map is NULL */
+ if (!bdata->node_bootmem_map)
+ return NULL;
+
+ end_pfn = bdata->node_low_pfn;
+ limit = PFN_DOWN(limit);
if (limit && end_pfn > limit)
end_pfn = limit;
- eidx = end_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
+ eidx = end_pfn - PFN_DOWN(bdata->node_boot_start);
offset = 0;
- if (align &&
- (bdata->node_boot_start & (align - 1UL)) != 0)
- offset = (align - (bdata->node_boot_start & (align - 1UL)));
- offset >>= PAGE_SHIFT;
+ if (align && (bdata->node_boot_start & (align - 1UL)) != 0)
+ offset = align - (bdata->node_boot_start & (align - 1UL));
+ offset = PFN_DOWN(offset);
/*
* We try to allocate bootmem pages above 'goal'
* first, then we try to allocate lower pages.
*/
- if (goal && (goal >= bdata->node_boot_start) &&
- ((goal >> PAGE_SHIFT) < end_pfn)) {
+ if (goal && goal >= bdata->node_boot_start && PFN_DOWN(goal) < end_pfn) {
preferred = goal - bdata->node_boot_start;
if (bdata->last_success >= preferred)
} else
preferred = 0;
- preferred = ALIGN(preferred, align) >> PAGE_SHIFT;
- preferred += offset;
- areasize = (size+PAGE_SIZE-1)/PAGE_SIZE;
+ preferred = PFN_DOWN(ALIGN(preferred, align)) + offset;
+ areasize = (size + PAGE_SIZE-1) / PAGE_SIZE;
incr = align >> PAGE_SHIFT ? : 1;
restart_scan:
for (j = i + 1; j < i + areasize; ++j) {
if (j >= eidx)
goto fail_block;
- if (test_bit (j, bdata->node_bootmem_map))
+ if (test_bit(j, bdata->node_bootmem_map))
goto fail_block;
}
start = i;
return NULL;
found:
- bdata->last_success = start << PAGE_SHIFT;
+ bdata->last_success = PFN_PHYS(start);
BUG_ON(start >= eidx);
/*
bdata->last_offset && bdata->last_pos+1 == start) {
offset = ALIGN(bdata->last_offset, align);
BUG_ON(offset > PAGE_SIZE);
- remaining_size = PAGE_SIZE-offset;
+ remaining_size = PAGE_SIZE - offset;
if (size < remaining_size) {
areasize = 0;
/* last_pos unchanged */
- bdata->last_offset = offset+size;
- ret = phys_to_virt(bdata->last_pos*PAGE_SIZE + offset +
- bdata->node_boot_start);
+ bdata->last_offset = offset + size;
+ ret = phys_to_virt(bdata->last_pos * PAGE_SIZE +
+ offset +
+ bdata->node_boot_start);
} else {
remaining_size = size - remaining_size;
- areasize = (remaining_size+PAGE_SIZE-1)/PAGE_SIZE;
- ret = phys_to_virt(bdata->last_pos*PAGE_SIZE + offset +
- bdata->node_boot_start);
- bdata->last_pos = start+areasize-1;
+ areasize = (remaining_size + PAGE_SIZE-1) / PAGE_SIZE;
+ ret = phys_to_virt(bdata->last_pos * PAGE_SIZE +
+ offset +
+ bdata->node_boot_start);
+ bdata->last_pos = start + areasize - 1;
bdata->last_offset = remaining_size;
}
bdata->last_offset &= ~PAGE_MASK;
/*
* Reserve the area now:
*/
- for (i = start; i < start+areasize; i++)
+ for (i = start; i < start + areasize; i++)
if (unlikely(test_and_set_bit(i, bdata->node_bootmem_map)))
BUG();
memset(ret, 0, size);
count = 0;
/* first extant page of the node */
- pfn = bdata->node_boot_start >> PAGE_SHIFT;
- idx = bdata->node_low_pfn - (bdata->node_boot_start >> PAGE_SHIFT);
+ pfn = PFN_DOWN(bdata->node_boot_start);
+ idx = bdata->node_low_pfn - pfn;
map = bdata->node_bootmem_map;
/* Check physaddr is O(LOG2(BITS_PER_LONG)) page aligned */
if (bdata->node_boot_start == 0 ||
}
}
} else {
- i+=BITS_PER_LONG;
+ i += BITS_PER_LONG;
}
pfn += BITS_PER_LONG;
}
*/
page = virt_to_page(bdata->node_bootmem_map);
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++;
+ idx = (get_mapsize(bdata) + PAGE_SIZE-1) >> PAGE_SHIFT;
+ for (i = 0; i < idx; i++, page++) {
__free_pages_bootmem(page, 0);
+ count++;
}
total += count;
bdata->node_bootmem_map = NULL;
return total;
}
-unsigned long __init init_bootmem_node (pg_data_t *pgdat, unsigned long freepfn, unsigned long startpfn, unsigned long endpfn)
+unsigned long __init init_bootmem_node(pg_data_t *pgdat, unsigned long freepfn,
+ unsigned long startpfn, unsigned long endpfn)
{
- return(init_bootmem_core(pgdat, freepfn, startpfn, endpfn));
+ return init_bootmem_core(pgdat, freepfn, startpfn, endpfn);
}
-void __init reserve_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size)
+void __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
+ unsigned long size, int flags)
{
- reserve_bootmem_core(pgdat->bdata, physaddr, size);
+ reserve_bootmem_core(pgdat->bdata, physaddr, size, flags);
}
-void __init free_bootmem_node (pg_data_t *pgdat, unsigned long physaddr, unsigned long size)
+void __init free_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
+ unsigned long size)
{
free_bootmem_core(pgdat->bdata, physaddr, size);
}
-unsigned long __init free_all_bootmem_node (pg_data_t *pgdat)
+unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
{
- return(free_all_bootmem_core(pgdat));
+ return free_all_bootmem_core(pgdat);
}
-unsigned long __init init_bootmem (unsigned long start, unsigned long pages)
+unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
{
max_low_pfn = pages;
min_low_pfn = start;
- return(init_bootmem_core(NODE_DATA(0), start, 0, pages));
+ return init_bootmem_core(NODE_DATA(0), start, 0, pages);
}
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
-void __init reserve_bootmem (unsigned long addr, unsigned long size)
+int __init reserve_bootmem(unsigned long addr, unsigned long size,
+ int flags)
{
- reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size);
+ return reserve_bootmem_core(NODE_DATA(0)->bdata, addr, size, flags);
}
#endif /* !CONFIG_HAVE_ARCH_BOOTMEM_NODE */
-void __init free_bootmem (unsigned long addr, unsigned long size)
+void __init free_bootmem(unsigned long addr, unsigned long size)
{
- free_bootmem_core(NODE_DATA(0)->bdata, addr, size);
+ bootmem_data_t *bdata;
+ list_for_each_entry(bdata, &bdata_list, list)
+ free_bootmem_core(bdata, addr, size);
}
-unsigned long __init free_all_bootmem (void)
+unsigned long __init free_all_bootmem(void)
{
- return(free_all_bootmem_core(NODE_DATA(0)));
+ return free_all_bootmem_core(NODE_DATA(0));
}
-void * __init __alloc_bootmem_nopanic(unsigned long size, unsigned long align, unsigned long goal)
+void * __init __alloc_bootmem_nopanic(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, 0)))
- return(ptr);
+ list_for_each_entry(bdata, &bdata_list, list) {
+ ptr = __alloc_bootmem_core(bdata, size, align, goal, 0);
+ if (ptr)
+ return ptr;
+ }
return NULL;
}
-void * __init __alloc_bootmem(unsigned long size, unsigned long align, unsigned long goal)
+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;
/*
}
-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, 0);
if (ptr)
- return (ptr);
+ return ptr;
return __alloc_bootmem(size, align, goal);
}
-#define LOW32LIMIT 0xffffffff
+#ifndef ARCH_LOW_ADDRESS_LIMIT
+#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
+#endif
-void * __init __alloc_bootmem_low(unsigned long size, unsigned long align, unsigned long goal)
+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);
+ 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.
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);
+ return __alloc_bootmem_core(pgdat->bdata, size, align, goal,
+ ARCH_LOW_ADDRESS_LIMIT);
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff