diff options
| author | Haibo Xu <haibo.xu@arm.com> | 2019-01-30 11:48:02 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-01-30 11:49:08 -0800 |
| commit | cedff8d3aef3bc2055b1a7c3ad47a4c8297367ea (patch) | |
| tree | 6d3715999a76b64f9c8df3abbf6c46e8f12544cb /pkg/sentry/time/tsc_arm64.s | |
| parent | f03c7e48e71009a64c30b57648fd234710fd578a (diff) | |
Add muldiv/rd_tsc support for arm64 platform.
Signed-off-by: Haibo Xu <haibo.xu@arm.com>
Change-Id: If35459be78e023346a140184401172f8e023c7f9
PiperOrigin-RevId: 231638020
Diffstat (limited to 'pkg/sentry/time/tsc_arm64.s')
| -rw-r--r-- | pkg/sentry/time/tsc_arm64.s | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/pkg/sentry/time/tsc_arm64.s b/pkg/sentry/time/tsc_arm64.s new file mode 100644 index 000000000..c1c9760ef --- /dev/null +++ b/pkg/sentry/time/tsc_arm64.s @@ -0,0 +1,22 @@ +// Copyright 2018 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "textflag.h" + +TEXT ·Rdtsc(SB),NOSPLIT,$0-8 + // Get the virtual counter. + ISB $15 + WORD $0xd53be040 //MRS CNTVCT_EL0, R0 + MOVD R0, ret+0(FP) + RET |