From 1419e5b5167e6ff35882473b81741d0815c453ea Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Fri, 5 Feb 2021 13:53:32 +0100 Subject: [PATCH] stm32mp: update MMU config before the relocation Mark the top of ram, used for relocated U-Boot as a normal memory (cacheable and executable) to avoid permission access issue when U-Boot jumps to this relocated code. When MMU is activated in pre-reloc stage; only the beginning of DDR is marked executable. This patch avoids access issue when DACR is correctly managed. Signed-off-by: Patrick Delaunay --- arch/arm/mach-stm32mp/dram_init.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/arch/arm/mach-stm32mp/dram_init.c b/arch/arm/mach-stm32mp/dram_init.c index ad6977fd44..66e81bacca 100644 --- a/arch/arm/mach-stm32mp/dram_init.c +++ b/arch/arm/mach-stm32mp/dram_init.c @@ -13,6 +13,7 @@ #include #include #include +#include DECLARE_GLOBAL_DATA_PTR; @@ -41,6 +42,7 @@ int dram_init(void) ulong board_get_usable_ram_top(ulong total_size) { + phys_size_t size; phys_addr_t reg; struct lmb lmb; @@ -48,10 +50,13 @@ ulong board_get_usable_ram_top(ulong total_size) lmb_init(&lmb); lmb_add(&lmb, gd->ram_base, gd->ram_size); boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob); - reg = lmb_alloc(&lmb, CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K); + size = ALIGN(CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE), + reg = lmb_alloc(&lmb, size, MMU_SECTION_SIZE); - if (reg) - return ALIGN(reg + CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K); + if (!reg) + reg = gd->ram_top - size; - return gd->ram_top; + mmu_set_region_dcache_behaviour(reg, size, DCACHE_DEFAULT_OPTION); + + return reg + size; } -- 2.39.5