LXR uboot/arch/arm/mach-mvebu/arm64-common.c

   1/*
   2 * Copyright (C) 2016 Stefan Roese <sr@denx.de>
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <fdtdec.h>
  10#include <libfdt.h>
  11#include <pci.h>
  12#include <asm/io.h>
  13#include <asm/system.h>
  14#include <asm/arch/cpu.h>
  15#include <asm/arch/soc.h>
  16#include <asm/armv8/mmu.h>
  17
  18DECLARE_GLOBAL_DATA_PTR;
  19
  20/*
  21 * Not all memory is mapped in the MMU. So we need to restrict the
  22 * memory size so that U-Boot does not try to access it. Also, the
  23 * internal registers are located at 0xf000.0000 - 0xffff.ffff.
  24 * Currently only 2GiB are mapped for system memory. This is what
  25 * we pass to the U-Boot subsystem here.
  26 */
  27#define USABLE_RAM_SIZE         0x80000000
  28
  29ulong board_get_usable_ram_top(ulong total_size)
  30{
  31        if (gd->ram_size > USABLE_RAM_SIZE)
  32                return USABLE_RAM_SIZE;
  33
  34        return gd->ram_size;
  35}
  36
  37/*
  38 * On ARMv8, MBus is not configured in U-Boot. To enable compilation
  39 * of the already implemented drivers, lets add a dummy version of
  40 * this function so that linking does not fail.
  41 */
  42const struct mbus_dram_target_info *mvebu_mbus_dram_info(void)
  43{
  44        return NULL;
  45}
  46
  47/* DRAM init code ... */
  48
  49int dram_init_banksize(void)
  50{
  51        fdtdec_setup_memory_banksize();
  52
  53        return 0;
  54}
  55
  56int dram_init(void)
  57{
  58        if (fdtdec_setup_memory_size() != 0)
  59                return -EINVAL;
  60
  61        return 0;
  62}
  63
  64int arch_cpu_init(void)
  65{
  66        /* Nothing to do (yet) */
  67        return 0;
  68}
  69
  70int arch_early_init_r(void)
  71{
  72        struct udevice *dev;
  73        int ret;
  74        int i;
  75
  76        /*
  77         * Loop over all MISC uclass drivers to call the comphy code
  78         * and init all CP110 devices enabled in the DT
  79         */
  80        i = 0;
  81        while (1) {
  82                /* Call the comphy code via the MISC uclass driver */
  83                ret = uclass_get_device(UCLASS_MISC, i++, &dev);
  84
  85                /* We're done, once no further CP110 device is found */
  86                if (ret)
  87                        break;
  88        }
  89
  90        /* Cause the SATA device to do its early init */
  91        uclass_first_device(UCLASS_AHCI, &dev);
  92
  93#ifdef CONFIG_DM_PCI
  94        /* Trigger PCIe devices detection */
  95        pci_init();
  96#endif
  97
  98        return 0;
  99}
 100