1 /* 2 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/fsp/fsp_support.h> 9 #include <asm/e820.h> 10 #include <asm/post.h> 11 12 DECLARE_GLOBAL_DATA_PTR; 13 14 int dram_init(void) 15 { 16 phys_size_t ram_size = 0; 17 const struct hob_header *hdr; 18 struct hob_res_desc *res_desc; 19 20 hdr = gd->arch.hob_list; 21 while (!end_of_hob(hdr)) { 22 if (hdr->type == HOB_TYPE_RES_DESC) { 23 res_desc = (struct hob_res_desc *)hdr; 24 if (res_desc->type == RES_SYS_MEM || 25 res_desc->type == RES_MEM_RESERVED) { 26 ram_size += res_desc->len; 27 } 28 } 29 hdr = get_next_hob(hdr); 30 } 31 32 gd->ram_size = ram_size; 33 post_code(POST_DRAM); 34 35 return 0; 36 } 37 38 void dram_init_banksize(void) 39 { 40 gd->bd->bi_dram[0].start = 0; 41 gd->bd->bi_dram[0].size = gd->ram_size; 42 } 43 44 /* 45 * This function looks for the highest region of memory lower than 4GB which 46 * has enough space for U-Boot where U-Boot is aligned on a page boundary. 47 * It overrides the default implementation found elsewhere which simply 48 * picks the end of ram, wherever that may be. The location of the stack, 49 * the relocation address, and how far U-Boot is moved by relocation are 50 * set in the global data structure. 51 */ 52 ulong board_get_usable_ram_top(ulong total_size) 53 { 54 return fsp_get_usable_lowmem_top(gd->arch.hob_list); 55 } 56 57 unsigned install_e820_map(unsigned max_entries, struct e820entry *entries) 58 { 59 unsigned num_entries = 0; 60 const struct hob_header *hdr; 61 struct hob_res_desc *res_desc; 62 63 hdr = gd->arch.hob_list; 64 65 while (!end_of_hob(hdr)) { 66 if (hdr->type == HOB_TYPE_RES_DESC) { 67 res_desc = (struct hob_res_desc *)hdr; 68 entries[num_entries].addr = res_desc->phys_start; 69 entries[num_entries].size = res_desc->len; 70 71 if (res_desc->type == RES_SYS_MEM) 72 entries[num_entries].type = E820_RAM; 73 else if (res_desc->type == RES_MEM_RESERVED) 74 entries[num_entries].type = E820_RESERVED; 75 } 76 hdr = get_next_hob(hdr); 77 num_entries++; 78 } 79 80 return num_entries; 81 } 82