From dc7e5f190de5ac89fafe3e6212a6167a2b7a36d0 Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Thu, 30 Apr 2020 16:30:21 +0200 Subject: [PATCH] arm: stm32mp: activate data cache on DDR in SPL Activate cache on DDR to improve the accesses to DDR used by SPL: - CONFIG_SPL_BSS_START_ADDR - CONFIG_SYS_SPL_MALLOC_START Cache is configured only when DDR is fully initialized, to avoid speculative access and issue in get_ram_size(). Data cache is deactivated at the end of SPL, to flush the data cache and the TLB. Reviewed-by: Patrice Chotard Signed-off-by: Patrick Delaunay --- arch/arm/mach-stm32mp/spl.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/arm/mach-stm32mp/spl.c b/arch/arm/mach-stm32mp/spl.c index 6368db4f6d..b7e7e92ef6 100644 --- a/arch/arm/mach-stm32mp/spl.c +++ b/arch/arm/mach-stm32mp/spl.c @@ -4,6 +4,7 @@ */ #include +#include #include #include #include @@ -128,4 +129,22 @@ void board_init_f(ulong dummy) printf("DRAM init failed: %d\n", ret); hang(); } + + /* + * activate cache on DDR only when DDR is fully initialized + * to avoid speculative access and issue in get_ram_size() + */ + if (!CONFIG_IS_ENABLED(SYS_DCACHE_OFF)) + mmu_set_region_dcache_behaviour(STM32_DDR_BASE, STM32_DDR_SIZE, + DCACHE_DEFAULT_OPTION); +} + +void spl_board_prepare_for_boot(void) +{ + dcache_disable(); +} + +void spl_board_prepare_for_boot_linux(void) +{ + dcache_disable(); } -- 2.39.5