// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause /* * Copyright (C) 2018, STMicroelectronics - All Rights Reserved */ #define LOG_CATEGORY LOGC_ARCH #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; int dram_init(void) { struct ram_info ram; struct udevice *dev; int ret; ret = uclass_get_device(UCLASS_RAM, 0, &dev); /* in case there is no RAM driver, retrieve DDR size from DT */ if (ret == -ENODEV) { return fdtdec_setup_mem_size_base(); } else if (ret) { log_err("RAM init failed: %d\n", ret); return ret; } ret = ram_get_info(dev, &ram); if (ret) { log_debug("Cannot get RAM size: %d\n", ret); return ret; } log_debug("RAM init base=%p, size=%zx\n", (void *)ram.base, ram.size); gd->ram_size = ram.size; return 0; } phys_addr_t board_get_usable_ram_top(phys_size_t total_size) { phys_size_t size; phys_addr_t reg; struct lmb lmb; if (!total_size) return gd->ram_top; /* * make sure U-Boot uses address space below 4GB boundaries even * if the effective available memory is bigger */ gd->ram_top = clamp_val(gd->ram_top, 0, SZ_4G - 1); /* found enough not-reserved memory to relocated U-Boot */ lmb_init(&lmb); lmb_add(&lmb, gd->ram_base, gd->ram_top - gd->ram_base); boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob); /* 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; /* 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; } void efi_add_known_memory(void) { if (IS_ENABLED(CONFIG_EFI_LOADER)) /* * Memory over ram_top is reserved to OPTEE. * Declare to EFI only memory area below ram_top */ efi_add_memory_map(gd->ram_base, gd->ram_top - gd->ram_base, EFI_CONVENTIONAL_MEMORY); }