Xiang Wang | 411a8b7 | 2019-01-23 11:45:06 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2019 HardenedLinux |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #include <stdint.h> |
| 17 | #include <string.h> |
| 18 | #include <soc/otp.h> |
| 19 | #include <soc/sdram.h> |
| 20 | #include <cbfs.h> |
| 21 | #include <device_tree.h> |
| 22 | #include <bootstate.h> |
| 23 | #include <mcall.h> |
| 24 | |
| 25 | static void do_fixup_mac(struct device_tree_node *node) |
| 26 | { |
| 27 | uint32_t serial = otp_read_serial(); |
| 28 | static unsigned char mac[6] = { 0x70, 0xb3, 0xd5, 0x92, 0xf0, 0x00 }; |
| 29 | if (serial != ~0) { |
| 30 | mac[5] |= (serial >> 0) & 0xff; |
| 31 | mac[4] |= (serial >> 8) & 0xff; |
| 32 | mac[3] |= (serial >> 16) & 0xff; |
| 33 | } |
| 34 | dt_add_bin_prop(node, "local-mac-address", mac, 6); |
| 35 | } |
| 36 | |
| 37 | static void fixup_mac(struct device_tree_node *parent) |
| 38 | { |
| 39 | struct device_tree_property *prop; |
| 40 | const char *name = "local-mac-address"; |
| 41 | |
| 42 | list_for_each(prop, parent->properties, list_node) { |
| 43 | if (!strcmp(name, prop->prop.name)) |
| 44 | do_fixup_mac(parent); |
| 45 | } |
| 46 | |
| 47 | struct device_tree_node *child; |
| 48 | list_for_each(child, parent->children, list_node) { |
| 49 | fixup_mac(child); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | static void do_fixup_memory(struct device_tree_node *node) |
| 54 | { |
| 55 | u64 addrs[1], sizes[1]; |
| 56 | addrs[0] = 0x80000000; |
| 57 | sizes[0] = sdram_size_mb() * 1024 * 1024; |
| 58 | dt_add_reg_prop(node, addrs, sizes, 1, 2, 2); |
| 59 | } |
| 60 | |
| 61 | |
| 62 | static void fixup_memory(struct device_tree_node *parent) |
| 63 | { |
| 64 | struct device_tree_property *prop; |
| 65 | const char *name = "device_type"; |
| 66 | const char *value = "memory"; |
| 67 | |
| 68 | list_for_each(prop, parent->properties, list_node) { |
| 69 | if (!strcmp(name, prop->prop.name)) { |
| 70 | if (!strcmp(value, (char *)prop->prop.data)) |
| 71 | do_fixup_memory(parent); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | struct device_tree_node *child; |
| 76 | list_for_each(child, parent->children, list_node) { |
| 77 | fixup_memory(child); |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | static void fixup_fdt(void *unused) |
| 82 | { |
| 83 | void *fdt_rom; |
| 84 | struct device_tree *tree; |
| 85 | |
| 86 | /* load flat dt from cbfs */ |
| 87 | fdt_rom = cbfs_boot_map_with_leak("fallback/DTB", CBFS_TYPE_RAW, NULL); |
| 88 | |
| 89 | /* Expand DT into a tree */ |
| 90 | tree = fdt_unflatten(fdt_rom); |
| 91 | |
| 92 | /* fixup tree */ |
| 93 | fixup_mac(tree->root); |
| 94 | fixup_memory(tree->root); |
| 95 | |
| 96 | /* convert the tree to a flat dt */ |
| 97 | void *dt = malloc(dt_flat_size(tree)); |
| 98 | dt_flatten(tree, dt); |
| 99 | |
| 100 | /* update HLS */ |
| 101 | for (int i = 0; i < CONFIG_MAX_CPUS; i++) |
| 102 | OTHER_HLS(i)->fdt = dt; |
| 103 | } |
| 104 | |
| 105 | BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_EXIT, fixup_fdt, NULL); |