LXR uboot/arch/arm/mach-stm32mp/dram

   1// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
   2/*
   3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <image.h>
   9#include <init.h>
  10#include <lmb.h>
  11#include <log.h>
  12#include <ram.h>
  13
  14DECLARE_GLOBAL_DATA_PTR;
  15
  16int dram_init(void)
  17{
  18        struct ram_info ram;
  19        struct udevice *dev;
  20        int ret;
  21
  22        ret = uclass_get_device(UCLASS_RAM, 0, &dev);
  23        if (ret) {
  24                debug("RAM init failed: %d\n", ret);
  25                return ret;
  26        }
  27        ret = ram_get_info(dev, &ram);
  28        if (ret) {
  29                debug("Cannot get RAM size: %d\n", ret);
  30                return ret;
  31        }
  32        debug("RAM init base=%lx, size=%x\n", ram.base, ram.size);
  33
  34        gd->ram_size = ram.size;
  35
  36        return 0;
  37}
  38
  39ulong board_get_usable_ram_top(ulong total_size)
  40{
  41        phys_addr_t reg;
  42        struct lmb lmb;
  43
  44        /* found enough not-reserved memory to relocated U-Boot */
  45        lmb_init(&lmb);
  46        lmb_add(&lmb, gd->ram_base, gd->ram_size);
  47        boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob);
  48        reg = lmb_alloc(&lmb, CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K);
  49
  50        if (reg)
  51                return ALIGN(reg + CONFIG_SYS_MALLOC_LEN + total_size, SZ_4K);
  52
  53        return gd->ram_top;
  54}
  55