1 /* 2 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <vbe.h> 9 #include <asm/coreboot_tables.h> 10 #include <asm/e820.h> 11 12 /** 13 * cb_table_init() - initialize a coreboot table header 14 * 15 * This fills in the coreboot table header signature and the header bytes. 16 * Other fields are set to zero. 17 * 18 * @cbh: coreboot table header address 19 */ 20 static void cb_table_init(struct cb_header *cbh) 21 { 22 memset(cbh, 0, sizeof(struct cb_header)); 23 memcpy(cbh->signature, "LBIO", 4); 24 cbh->header_bytes = sizeof(struct cb_header); 25 } 26 27 /** 28 * cb_table_add_entry() - add a coreboot table entry 29 * 30 * This increases the coreboot table entry size with added table entry length 31 * and increases entry count by 1. 32 * 33 * @cbh: coreboot table header address 34 * @cbr: to be added table entry address 35 * @return: pointer to next table entry address 36 */ 37 static u32 cb_table_add_entry(struct cb_header *cbh, struct cb_record *cbr) 38 { 39 cbh->table_bytes += cbr->size; 40 cbh->table_entries++; 41 42 return (u32)cbr + cbr->size; 43 } 44 45 /** 46 * cb_table_finalize() - finalize the coreboot table 47 * 48 * This calculates the checksum for all coreboot table entries as well as 49 * the checksum for the coreboot header itself. 50 * 51 * @cbh: coreboot table header address 52 */ 53 static void cb_table_finalize(struct cb_header *cbh) 54 { 55 struct cb_record *cbr = (struct cb_record *)(cbh + 1); 56 57 cbh->table_checksum = compute_ip_checksum(cbr, cbh->table_bytes); 58 cbh->header_checksum = compute_ip_checksum(cbh, cbh->header_bytes); 59 } 60 61 void write_coreboot_table(u32 addr, struct memory_area *cfg_tables) 62 { 63 struct cb_header *cbh = (struct cb_header *)addr; 64 struct cb_record *cbr; 65 struct cb_memory *mem; 66 struct cb_memory_range *map; 67 struct e820entry e820[32]; 68 struct cb_framebuffer *fb; 69 struct vesa_mode_info *vesa; 70 int i, num; 71 72 cb_table_init(cbh); 73 cbr = (struct cb_record *)(cbh + 1); 74 75 /* 76 * Two type of coreboot table entries are generated by us. 77 * They are 'struct cb_memory' and 'struct cb_framebuffer'. 78 */ 79 80 /* populate memory map table */ 81 mem = (struct cb_memory *)cbr; 82 mem->tag = CB_TAG_MEMORY; 83 map = mem->map; 84 85 /* first install e820 defined memory maps */ 86 num = install_e820_map(ARRAY_SIZE(e820), e820); 87 for (i = 0; i < num; i++) { 88 map->start.lo = e820[i].addr & 0xffffffff; 89 map->start.hi = e820[i].addr >> 32; 90 map->size.lo = e820[i].size & 0xffffffff; 91 map->size.hi = e820[i].size >> 32; 92 map->type = e820[i].type; 93 map++; 94 } 95 96 /* then install all configuration tables */ 97 while (cfg_tables->size) { 98 map->start.lo = cfg_tables->start & 0xffffffff; 99 map->start.hi = cfg_tables->start >> 32; 100 map->size.lo = cfg_tables->size & 0xffffffff; 101 map->size.hi = cfg_tables->size >> 32; 102 map->type = CB_MEM_TABLE; 103 map++; 104 num++; 105 cfg_tables++; 106 } 107 mem->size = num * sizeof(struct cb_memory_range) + 108 sizeof(struct cb_record); 109 cbr = (struct cb_record *)cb_table_add_entry(cbh, cbr); 110 111 /* populate framebuffer table if we have sane vesa info */ 112 vesa = &mode_info.vesa; 113 if (vesa->x_resolution && vesa->y_resolution) { 114 fb = (struct cb_framebuffer *)cbr; 115 fb->tag = CB_TAG_FRAMEBUFFER; 116 fb->size = sizeof(struct cb_framebuffer); 117 118 fb->x_resolution = vesa->x_resolution; 119 fb->y_resolution = vesa->y_resolution; 120 fb->bits_per_pixel = vesa->bits_per_pixel; 121 fb->bytes_per_line = vesa->bytes_per_scanline; 122 fb->physical_address = vesa->phys_base_ptr; 123 fb->red_mask_size = vesa->red_mask_size; 124 fb->red_mask_pos = vesa->red_mask_pos; 125 fb->green_mask_size = vesa->green_mask_size; 126 fb->green_mask_pos = vesa->green_mask_pos; 127 fb->blue_mask_size = vesa->blue_mask_size; 128 fb->blue_mask_pos = vesa->blue_mask_pos; 129 fb->reserved_mask_size = vesa->reserved_mask_size; 130 fb->reserved_mask_pos = vesa->reserved_mask_pos; 131 132 cbr = (struct cb_record *)cb_table_add_entry(cbh, cbr); 133 } 134 135 cb_table_finalize(cbh); 136 } 137