From 7dc6068fc10d699558176da364a3e7a6cfccdaa1 Mon Sep 17 00:00:00 2001 From: Patrick Delaunay Date: Fri, 7 May 2021 14:50:34 +0200 Subject: [PATCH] stm32mp: Increase the reserved memory in board_get_usable_ram_top Add 8M for the U-Boot reserved memory (display, fdt, gd, ...) mapped cacheable before relocation. Without this patch the device tree, located before the MALLOC area is not tagged cacheable just after relocation, before mmu reconfiguration. This patch reduces the duration for device tree parsing in lmb_init_and_reserve. Signed-off-by: Patrick Delaunay --- arch/arm/mach-stm32mp/dram_init.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-stm32mp/dram_init.c b/arch/arm/mach-stm32mp/dram_init.c index 66e81bacca..3c097029bd 100644 --- a/arch/arm/mach-stm32mp/dram_init.c +++ b/arch/arm/mach-stm32mp/dram_init.c @@ -50,13 +50,16 @@ 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); - size = ALIGN(CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE), + /* add 8M for reserved memory for display, fdt, gd,... */ + size = ALIGN(SZ_8M + CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE), reg = lmb_alloc(&lmb, size, MMU_SECTION_SIZE); if (!reg) reg = gd->ram_top - size; - mmu_set_region_dcache_behaviour(reg, size, DCACHE_DEFAULT_OPTION); + /* before relocation, mark the U-Boot memory as cacheable by default */ + if (!(gd->flags & GD_FLG_RELOC)) + mmu_set_region_dcache_behaviour(reg, size, DCACHE_DEFAULT_OPTION); return reg + size; } -- 2.39.5