diff options
Diffstat (limited to 'arch/i386/kernel/e820.c')
| -rw-r--r-- | arch/i386/kernel/e820.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/i386/kernel/e820.c b/arch/i386/kernel/e820.c index 31f4670ef740..829beec9247e 100644 --- a/arch/i386/kernel/e820.c +++ b/arch/i386/kernel/e820.c @@ -825,6 +825,26 @@ void __init limit_regions(unsigned long long size) print_memory_map("limit_regions endfunc"); } +/* + * This function checks if any part of the range <start,end> is mapped + * with type. + */ +int +e820_any_mapped(u64 start, u64 end, unsigned type) +{ + int i; + for (i = 0; i < e820.nr_map; i++) { + const struct e820entry *ei = &e820.map[i]; + if (type && ei->type != type) + continue; + if (ei->addr >= end || ei->addr + ei->size <= start) + continue; + return 1; + } + return 0; +} +EXPORT_SYMBOL_GPL(e820_any_mapped); + /* * This function checks if the entire range <start,end> is mapped with type. * |
