arch: Rename FreeBSD namespace as free_bsd

As part of recent decisions regarding namespace
naming conventions, all namespaces will be changed
to snake case.

::FreeBSD became ::free_bsd.

Change-Id: If3fc4b04e60e6e1e790962dc81744ec7f712d8a6
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45419
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu>

src/arch/arm/freebsd/fs_workload.cc

@@ -45,7 +45,7 @@
 #include "mem/physical.hh"
 #include "sim/stat_control.hh"
 
-using namespace FreeBSD;
+using namespace free_bsd;
 
 namespace ArmISA
 {

src/arch/generic/freebsd/threadinfo.hh

@@ -36,7 +36,9 @@
 #include "cpu/thread_context.hh"
 #include "sim/system.hh"
 
-namespace FreeBSD {
+GEM5_DEPRECATED_NAMESPACE(FreeBSD, free_bsd);
+namespace free_bsd
+{
 
 class ThreadInfo
 {
@@ -54,6 +56,6 @@ class ThreadInfo
     {}
 };
 
-} // namespace FreeBSD
+} // namespace free_bsd
 
 #endif // __ARCH_GENERIC_FREEBSD_THREADINFO_HH__

src/kern/freebsd/events.cc

@@ -40,7 +40,8 @@
 #include "kern/system_events.hh"
 #include "sim/system.hh"
 
-namespace FreeBSD
+GEM5_DEPRECATED_NAMESPACE(FreeBSD, free_bsd);
+namespace free_bsd
 {
 
 void
@@ -60,4 +61,4 @@ onUDelay(ThreadContext *tc, uint64_t div, uint64_t mul, uint64_t time)
         tc->quiesceTick(curTick() + sim_clock::Int::ns * time);
 }
 
-} // namespace FreeBSD
+} // namespace free_bsd

src/kern/freebsd/events.hh

@@ -33,10 +33,12 @@
 #ifndef __KERN_FREEBSD_EVENTS_HH__
 #define __KERN_FREEBSD_EVENTS_HH__
 
+#include "base/compiler.hh"
 #include "kern/system_events.hh"
 #include "sim/guest_abi.hh"
 
-namespace FreeBSD
+GEM5_DEPRECATED_NAMESPACE(FreeBSD, free_bsd);
+namespace free_bsd
 {
 
 void onUDelay(ThreadContext *tc, uint64_t div, uint64_t mul, uint64_t time);