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
/*
* 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
BUG_ON(!size);
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);
#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 sidx, eidx;
unsigned long i;
+ 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.
*/
- BUG_ON(!size);
- BUG_ON(PFN_DOWN(addr + size) > 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.
*/
- sidx = PFN_UP(addr) - PFN_DOWN(bdata->node_boot_start);
+ 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)))
}
void __init reserve_bootmem_node(pg_data_t *pgdat, unsigned long physaddr,
- unsigned long size)
+ 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,
}
#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)
{
- 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)