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 <linux/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