From 24f55496a40fc2903a3737563c52b952d9a25332 Mon Sep 17 00:00:00 2001 From: York Sun Date: Mon, 6 Mar 2017 09:02:30 -0800 Subject: [PATCH] armv8: layerscape: Update MMU mapping with actual DDR size Update mapping with actual DDR size. Non-existing memory should not be mapped as "normal" memory to avoid speculative access. Signed-off-by: York Sun --- arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 42 +++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c index d0be335b2f..368bdcdb88 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c @@ -101,12 +101,50 @@ static inline void final_mmu_setup(void) { u64 tlb_addr_save = gd->arch.tlb_addr; unsigned int el = current_el(); -#ifdef CONFIG_SYS_MEM_RESERVE_SECURE int index; -#endif mem_map = final_map; + /* Update mapping for DDR to actual size */ + for (index = 0; index < ARRAY_SIZE(final_map) - 2; index++) { + /* + * Find the entry for DDR mapping and update the address and + * size. Zero-sized mapping will be skipped when creating MMU + * table. + */ + switch (final_map[index].virt) { + case CONFIG_SYS_FSL_DRAM_BASE1: + final_map[index].virt = gd->bd->bi_dram[0].start; + final_map[index].phys = gd->bd->bi_dram[0].start; + final_map[index].size = gd->bd->bi_dram[0].size; + break; +#ifdef CONFIG_SYS_FSL_DRAM_BASE2 + case CONFIG_SYS_FSL_DRAM_BASE2: +#if (CONFIG_NR_DRAM_BANKS >= 2) + final_map[index].virt = gd->bd->bi_dram[1].start; + final_map[index].phys = gd->bd->bi_dram[1].start; + final_map[index].size = gd->bd->bi_dram[1].size; +#else + final_map[index].size = 0; +#endif + break; +#endif +#ifdef CONFIG_SYS_FSL_DRAM_BASE3 + case CONFIG_SYS_FSL_DRAM_BASE3: +#if (CONFIG_NR_DRAM_BANKS >= 3) + final_map[index].virt = gd->bd->bi_dram[2].start; + final_map[index].phys = gd->bd->bi_dram[2].start; + final_map[index].size = gd->bd->bi_dram[2].size; +#else + final_map[index].size = 0; +#endif + break; +#endif + default: + break; + } + } + #ifdef CONFIG_SYS_MEM_RESERVE_SECURE if (gd->arch.secure_ram & MEM_RESERVE_SECURE_MAINTAINED) { if (el == 3) { -- 2.39.5