mx53_dram.c 1.3 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2017 Beckhoff Automation GmbH & Co. KG
  4. * Patrick Bruenn <p.bruenn@beckhoff.com>
  5. */
  6. #include <common.h>
  7. #include <init.h>
  8. #include <asm/global_data.h>
  9. DECLARE_GLOBAL_DATA_PTR;
  10. phys_size_t get_effective_memsize(void)
  11. {
  12. /*
  13. * WARNING: We must override get_effective_memsize() function here
  14. * to report only the size of the first DRAM bank. This is to make
  15. * U-Boot relocator place U-Boot into valid memory, that is, at the
  16. * end of the first DRAM bank. If we did not override this function
  17. * like so, U-Boot would be placed at the address of the first DRAM
  18. * bank + total DRAM size - sizeof(uboot), which in the setup where
  19. * each DRAM bank contains 512MiB of DRAM would result in placing
  20. * U-Boot into invalid memory area close to the end of the first
  21. * DRAM bank.
  22. */
  23. return get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
  24. }
  25. int dram_init(void)
  26. {
  27. gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
  28. gd->ram_size += get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
  29. return 0;
  30. }
  31. int dram_init_banksize(void)
  32. {
  33. gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  34. gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1, 1 << 30);
  35. gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
  36. gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2, 1 << 30);
  37. return 0;
  38. }