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N1SDP: Initialise CNTFRQ in Non Secure CNTBaseN

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N1SDP exhibits the behavior similar to Juno wherein CNTBaseN.CNTFRQ
can be written but does not reflect the value of the CNTFRQ register
in CNTCTLBase frame. This doesn't follow ARM ARM in that the value
updated in CNTCTLBase.CNTFRQ is not reflected in CNTBaseN.CNTFRQ.

Hence enable the workaround (applied to Juno) for N1SDP that updates
the CNTFRQ register in the Non Secure CNTBaseN frame.

Change-Id: Id89ee1bca0f25c9d62f8f794f2c4f4e618cdf092
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
This commit is contained in:
Sami Mujawar 2019-05-10 08:52:07 +01:00
parent 49d64e5d0e
commit 603b372e53
1 changed files with 5 additions and 5 deletions
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10
plat/arm/common/arm_common.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -127,12 +127,12 @@ void arm_configure_sys_timer(void)
*/
mmio_write_32(ARM_SYS_TIMCTL_BASE + CNTCTLBASE_CNTFRQ, freq_val);
#ifdef PLAT_juno
#if defined(PLAT_juno) || defined(PLAT_n1sdp)
/*
* Initialize CNTFRQ register in Non-secure CNTBase frame.
* This is only required for Juno, because it doesn't follow ARM ARM
* in that the value updated in CNTFRQ is not reflected in
* CNTBASEN_CNTFRQ. Hence update the value manually.
* This is only required for Juno and N1SDP, because they do not
* follow ARM ARM in that the value updated in CNTFRQ is not
* reflected in CNTBASEN_CNTFRQ. Hence update the value manually.
*/
mmio_write_32(ARM_SYS_CNT_BASE_NS + CNTBASEN_CNTFRQ, freq_val);
#endif