Djam/arm-trusted-firmware
1
0
Fork 0
mirror of https://github.com/ARM-software/arm-trusted-firmware.git synced 2025-04-17 01:54:22 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

fix(rpi3): manually populate CNTFRQ reg

Browse source 
The rpi3 does not initialize the generic timer in BL1, which is now
required to use the delay timer in the dTPM driver. This change sets the
counter frequency register (CNTFRQ) with the rpi3's system counter
frequency value, as a prerequisite for timer initialization, and then
initializes the generic timer all during BL1 setup.

Change-Id: I4e2475b63ce4a97653202f94f506b5d3edc4c1a7
Signed-off-by: Abhi Singh <abhi.singh@arm.com>
This commit is contained in:
Abhi.Singh 2024-08-29 11:31:44 -05:00
parent e2c3611cf1
commit 11dff59946
2 changed files with 13 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
plat/rpi/rpi3/platform.mk
View file

@ -23,6 +23,7 @@ PLAT_BL_COMMON_SOURCES := drivers/ti/uart/aarch64/16550_console.S \
BL1_SOURCES += drivers/io/io_fip.c \
drivers/io/io_memmap.c \
drivers/io/io_storage.c \
drivers/delay_timer/generic_delay_timer.c \
lib/cpus/aarch64/cortex_a53.S \
plat/common/aarch64/platform_mp_stack.S \
plat/rpi/rpi3/rpi3_bl1_setup.c \

13
plat/rpi/rpi3/rpi3_bl1_setup.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2015-2024, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@ -13,6 +13,8 @@
#include <lib/mmio.h>
#include <lib/xlat_tables/xlat_mmu_helpers.h>
#include <lib/xlat_tables/xlat_tables_defs.h>
#include <drivers/generic_delay_timer.h>
#include <plat/common/platform.h>
#include <rpi_shared.h>
@ -37,6 +39,15 @@ void bl1_early_platform_setup(void)
/* Initialize the console to provide early debug support */
rpi3_console_init();
/*
* Write the System Timer Frequency to CNTFRQ manually, this
* is required to use the delay_timer functionality.
*/
write_cntfrq_el0(plat_get_syscnt_freq2());
/* Enable arch timer */
generic_delay_timer_init();
/* Allow BL1 to see the whole Trusted RAM */
bl1_tzram_layout.total_base = BL_RAM_BASE;
bl1_tzram_layout.total_size = BL_RAM_SIZE;