1 /* 2 * (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <libfdt.h> 9 #include <linux/err.h> 10 #include <asm/arch/gxbb.h> 11 #include <asm/arch/sm.h> 12 #include <asm/armv8/mmu.h> 13 #include <asm/unaligned.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 int dram_init(void) 18 { 19 const fdt64_t *val; 20 int offset; 21 int len; 22 23 offset = fdt_path_offset(gd->fdt_blob, "/memory"); 24 if (offset < 0) 25 return -EINVAL; 26 27 val = fdt_getprop(gd->fdt_blob, offset, "reg", &len); 28 if (len < sizeof(*val) * 2) 29 return -EINVAL; 30 31 /* Use unaligned access since cache is still disabled */ 32 gd->ram_size = get_unaligned_be64(&val[1]); 33 34 return 0; 35 } 36 37 int dram_init_banksize(void) 38 { 39 /* Reserve first 16 MiB of RAM for firmware */ 40 gd->bd->bi_dram[0].start = 0x1000000; 41 gd->bd->bi_dram[0].size = 0xf000000; 42 /* Reserve 2 MiB for ARM Trusted Firmware (BL31) */ 43 gd->bd->bi_dram[1].start = 0x10000000; 44 gd->bd->bi_dram[1].size = gd->ram_size - 0x10200000; 45 return 0; 46 } 47 48 void reset_cpu(ulong addr) 49 { 50 psci_system_reset(); 51 } 52 53 static struct mm_region gxbb_mem_map[] = { 54 { 55 .virt = 0x0UL, 56 .phys = 0x0UL, 57 .size = 0x80000000UL, 58 .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | 59 PTE_BLOCK_INNER_SHARE 60 }, { 61 .virt = 0x80000000UL, 62 .phys = 0x80000000UL, 63 .size = 0x80000000UL, 64 .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | 65 PTE_BLOCK_NON_SHARE | 66 PTE_BLOCK_PXN | PTE_BLOCK_UXN 67 }, { 68 /* List terminator */ 69 0, 70 } 71 }; 72 73 struct mm_region *mem_map = gxbb_mem_map; 74