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refactor(juno): disable non-invasive debug of secure state 

Disable non-invasive debug of secure state for Juno
in release builds. This makes sure that PMU counts
only Non-secure events.

Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I0d1c3f96f3b4e48360a7211ae55851d65d291025
This commit is contained in:
Zelalem 2021-05-13 15:10:03 -05:00
parent 57dde21207
commit 63ca6bbad8
2 changed files with 12 additions and 2 deletions
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4
include/plat/arm/css/common/css_def.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -137,6 +137,8 @@
#define SSC_DBGCFG_SET 0x14
#define SSC_DBGCFG_CLR 0x18
#define SPNIDEN_INT_CLR_SHIFT 4
#define SPNIDEN_SEL_SET_SHIFT 5
#define SPIDEN_INT_CLR_SHIFT 6
#define SPIDEN_SEL_SET_SHIFT 7

10
plat/arm/board/juno/juno_security.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2014-2021, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -115,6 +115,14 @@ static void init_debug_cfg(void)
/* Drive SPIDEN LOW to disable invasive debug of secure state. */
mmio_write_32(SSC_REG_BASE + SSC_DBGCFG_CLR,
1U << SPIDEN_INT_CLR_SHIFT);
/* Set internal drive selection for SPNIDEN. */
mmio_write_32(SSC_REG_BASE + SSC_DBGCFG_SET,
1U << SPNIDEN_SEL_SET_SHIFT);
/* Drive SPNIDEN LOW to disable non-invasive debug of secure state. */
mmio_write_32(SSC_REG_BASE + SSC_DBGCFG_CLR,
1U << SPNIDEN_INT_CLR_SHIFT);
#endif
}