xnu-2050.7.9.tar.gz

[apple/xnu.git] / osfmk / x86_64 / loose_ends.c

diff --git a/osfmk/x86_64/loose_ends.c b/osfmk/x86_64/loose_ends.c
index 10a086542bcc289180d046c080b899689bf14380..b912c6d9b98277be64a22de20103c7d7559468b6 100644 (file)
--- a/osfmk/x86_64/loose_ends.c
+++ b/osfmk/x86_64/loose_ends.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2011 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -582,7 +582,7 @@ flush_dcache64(addr64_t addr, unsigned count, int phys)
                dcache_incoherent_io_flush64(addr, count);
        }
        else {
-               uint32_t  linesize = cpuid_info()->cache_linesize;
+               uint64_t  linesize = cpuid_info()->cache_linesize;
                addr64_t  bound = (addr + count + linesize -1) & ~(linesize - 1);
                __mfence();
                while (addr < bound) {
@@ -646,6 +646,20 @@ kdp_register_callout(void)
 }
 #endif
 
+/*
+ * Return a uniformly distributed 64-bit random number.
+ *
+ * This interface should have minimal dependencies on kernel
+ * services, and thus be available very early in the life
+ * of the kernel.  But as a result, it may not be very random
+ * on all platforms.
+ */
+uint64_t
+early_random(void)
+{
+       return (ml_early_random());
+}
+
 #if !CONFIG_VMX
 int host_vmxon(boolean_t exclusive __unused)
 {