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- // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
- /*
- * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
- */
- #define LOG_CATEGORY LOGC_ARCH
- #include <common.h>
- #include <dm.h>
- #include <image.h>
- #include <init.h>
- #include <lmb.h>
- #include <log.h>
- #include <ram.h>
- #include <asm/global_data.h>
- #include <asm/system.h>
- 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);
- if (ret) {
- log_debug("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=%lx, size=%x\n", ram.base, ram.size);
- gd->ram_size = ram.size;
- return 0;
- }
- ulong board_get_usable_ram_top(ulong total_size)
- {
- phys_size_t size;
- phys_addr_t reg;
- struct lmb lmb;
- if (!total_size)
- return gd->ram_top;
- /* found enough not-reserved memory to relocated U-Boot */
- lmb_init(&lmb);
- lmb_add(&lmb, gd->ram_base, gd->ram_size);
- 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;
- }
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