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

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2016 Stefan Roese <sr@denx.de>
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <fdtdec.h>
   9#include <init.h>
  10#include <asm/cache.h>
  11#include <asm/global_data.h>
  12#include <asm/ptrace.h>
  13#include <linux/libfdt.h>
  14#include <linux/sizes.h>
  15#include <pci.h>
  16#include <asm/io.h>
  17#include <asm/system.h>
  18#include <asm/arch/cpu.h>
  19#include <asm/arch/soc.h>
  20#include <asm/armv8/mmu.h>
  21
  22DECLARE_GLOBAL_DATA_PTR;
  23
  24/*
  25 * Not all memory is mapped in the MMU. So we need to restrict the
  26 * memory size so that U-Boot does not try to access it. Also, the
  27 * internal registers are located at 0xf000.0000 - 0xffff.ffff.
  28 * Currently only 2GiB are mapped for system memory. This is what
  29 * we pass to the U-Boot subsystem here.
  30 */
  31#define USABLE_RAM_SIZE         0x80000000
  32
  33ulong board_get_usable_ram_top(ulong total_size)
  34{
  35        if (gd->ram_size > USABLE_RAM_SIZE)
  36                return USABLE_RAM_SIZE;
  37
  38        return gd->ram_size;
  39}
  40
  41/*
  42 * On ARMv8, MBus is not configured in U-Boot. To enable compilation
  43 * of the already implemented drivers, lets add a dummy version of
  44 * this function so that linking does not fail.
  45 */
  46const struct mbus_dram_target_info *mvebu_mbus_dram_info(void)
  47{
  48        return NULL;
  49}
  50
  51__weak int dram_init_banksize(void)
  52{
  53        if (CONFIG_IS_ENABLED(ARMADA_8K))
  54                return a8k_dram_init_banksize();
  55        else if (CONFIG_IS_ENABLED(ARMADA_3700))
  56                return a3700_dram_init_banksize();
  57        else
  58                return fdtdec_setup_memory_banksize();
  59}
  60
  61__weak int dram_init(void)
  62{
  63        if (CONFIG_IS_ENABLED(ARMADA_8K)) {
  64                gd->ram_size = a8k_dram_scan_ap_sz();
  65                if (gd->ram_size != 0)
  66                        return 0;
  67        }
  68
  69        if (CONFIG_IS_ENABLED(ARMADA_3700))
  70                return a3700_dram_init();
  71
  72        if (fdtdec_setup_mem_size_base() != 0)
  73                return -EINVAL;
  74
  75        return 0;
  76}
  77
  78int arch_cpu_init(void)
  79{
  80        /* Nothing to do (yet) */
  81        return 0;
  82}
  83
  84int arch_early_init_r(void)
  85{
  86        struct udevice *dev;
  87        int ret;
  88        int i;
  89
  90        /*
  91         * Loop over all MISC uclass drivers to call the comphy code
  92         * and init all CP110 devices enabled in the DT
  93         */
  94        i = 0;
  95        while (1) {
  96                /* Call the comphy code via the MISC uclass driver */
  97                ret = uclass_get_device(UCLASS_MISC, i++, &dev);
  98
  99                /* We're done, once no further CP110 device is found */
 100                if (ret)
 101                        break;
 102        }
 103
 104        /* Cause the SATA device to do its early init */
 105        uclass_first_device(UCLASS_AHCI, &dev);
 106
 107        /* Trigger PCIe devices detection */
 108        if (IS_ENABLED(CONFIG_PCI))
 109                pci_init();
 110
 111        return 0;
 112}
 113