diff options
| author | Patrick Wildt <patrick@cvs.openbsd.org> | 2017-02-03 10:46:20 +0000 |
|---|---|---|
| committer | Patrick Wildt <patrick@cvs.openbsd.org> | 2017-02-03 10:46:20 +0000 |
| commit | 848681829586d1e67b7f69b169b7ec89e7e61ad9 (patch) | |
| tree | 5c3b1598ebf47fef167d30c708a5d48f35102645 | |
| parent | 5e3bc90e0246b92c68038b567da63c4c73701df2 (diff) | |
Set the context id and counter offset to a known value. Enable access
to the physical timers at EL1.
From FreeBSD
| -rw-r--r-- | sys/arch/arm64/arm64/locore.S | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/arch/arm64/arm64/locore.S b/sys/arch/arm64/arm64/locore.S index 76ab4ebba3b..c96ec895b8a 100644 --- a/sys/arch/arm64/arm64/locore.S +++ b/sys/arch/arm64/arm64/locore.S @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.S,v 1.8 2017/02/03 10:34:21 patrick Exp $ */ +/* $OpenBSD: locore.S,v 1.9 2017/02/03 10:46:19 patrick Exp $ */ /*- * Copyright (c) 2012-2014 Andrew Turner * All rights reserved. @@ -74,6 +74,8 @@ _start: msr sctlr_el1, x2 isb + /* Set the context id */ + msr contextidr_el1, xzr /* Get the virt -> phys offset */ bl get_virt_delta @@ -222,6 +224,14 @@ drop_to_el1: /* Don't trap to EL2 for CP15 traps */ msr hstr_el2, xzr + /* Enable access to the physical timers at EL1 */ + mrs x2, cnthctl_el2 + orr x2, x2, #(CNTHCTL_EL1PCTEN | CNTHCTL_EL1PCEN) + msr cnthctl_el2, x2 + + /* Set the counter offset to a known value */ + msr cntvoff_el2, xzr + /* Hypervisor trap functions */ adr x2, hyp_vectors msr vbar_el2, x2 |