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| author | Madhukar Pappireddy <madhukar.pappireddy@arm.com> | 2023-03-22 15:27:22 -0500 |
|---|---|---|
| committer | Madhukar Pappireddy <madhukar.pappireddy@arm.com> | 2023-05-04 08:24:12 -0500 |
| commit | e8166d3e5937b8db43921b5049672b16af7f58e0 (patch) | |
| tree | 7eb9c1c80ab85cdcd3dc1318f798fed2aaec24f5 | |
| parent | c194aa0c6cac310a54e796f4a4dcf4563cb83128 (diff) | |
| download | arm-trusted-firmware-e8166d3e5937b8db43921b5049672b16af7f58e0.tar.gz | |
feat(sbsa): helper api for refreshing watchdog timer
This patch adds a helper API to explicitly refresh SBSA secure watchdog
timer. Please refer section A.3 of the following spec:
https://developer.arm.com/documentation/den0029/latest/
Change-Id: I2d0943792aea0092bee1e51d74b908348587e66b
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
| -rw-r--r-- | changelog.yaml | 3 | ||||
| -rw-r--r-- | drivers/arm/sbsa/sbsa.c | 8 | ||||
| -rw-r--r-- | include/drivers/arm/sbsa.h | 10 |
3 files changed, 18 insertions, 3 deletions
diff --git a/changelog.yaml b/changelog.yaml index 6dbb9b20d..c969b2c56 100644 --- a/changelog.yaml +++ b/changelog.yaml @@ -877,6 +877,9 @@ subsections: deprecated: - drivers/tzc380 + - title: SBSA + scope: sbsa + - title: Marvell scope: marvell-drivers diff --git a/drivers/arm/sbsa/sbsa.c b/drivers/arm/sbsa/sbsa.c index 79c6f2620..a88e20c04 100644 --- a/drivers/arm/sbsa/sbsa.c +++ b/drivers/arm/sbsa/sbsa.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2019, ARM Limited. All rights reserved. + * Copyright (c) 2019-2023, Arm Limited. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ @@ -40,3 +40,9 @@ void sbsa_wdog_stop(uintptr_t base) { mmio_write_32(base + SBSA_WDOG_WCS_OFFSET, (0x0)); } + +/* Refresh the secure watchdog timer explicitly */ +void sbsa_wdog_refresh(uintptr_t refresh_base) +{ + mmio_write_32(refresh_base + SBSA_WDOG_WRR_OFFSET, SBSA_WDOG_WRR_REFRESH); +} diff --git a/include/drivers/arm/sbsa.h b/include/drivers/arm/sbsa.h index 9403634f7..4ca71942e 100644 --- a/include/drivers/arm/sbsa.h +++ b/include/drivers/arm/sbsa.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2019, ARM Limited. All rights reserved. + * Copyright (c) 2019-2023, Arm Limited. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ @@ -9,7 +9,12 @@ #include <stdint.h> -/* Register Offsets */ +/* SBSA Secure Watchdog Register Offsets */ +/* Refresh frame */ +#define SBSA_WDOG_WRR_OFFSET UL(0x000) +#define SBSA_WDOG_WRR_REFRESH UL(0x1) + +/* Control and status frame */ #define SBSA_WDOG_WCS_OFFSET UL(0x000) #define SBSA_WDOG_WOR_LOW_OFFSET UL(0x008) #define SBSA_WDOG_WOR_HIGH_OFFSET UL(0x00C) @@ -20,5 +25,6 @@ void sbsa_wdog_start(uintptr_t base, uint64_t ms); void sbsa_wdog_stop(uintptr_t base); +void sbsa_wdog_refresh(uintptr_t refresh_base); #endif /* SBSA_H */ |