ron minnich | b44a388 | 2024-03-03 21:21:55 +0000 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <stdint.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <string.h> |
| 6 | #include <console/console.h> |
| 7 | #include <soc/otp.h> |
| 8 | #include <soc/sdram.h> |
| 9 | #include <cbfs.h> |
| 10 | #include <device_tree.h> |
| 11 | #include <bootstate.h> |
| 12 | #include <mcall.h> |
| 13 | |
| 14 | static void do_fixup_mac(struct device_tree_node *node) |
| 15 | { |
| 16 | uint32_t serial = otp_read_serial(); |
| 17 | static unsigned char mac[6] = { 0x70, 0xb3, 0xd5, 0x92, 0xf0, 0x00 }; |
| 18 | if (serial != ~0) { |
| 19 | mac[5] |= (serial >> 0) & 0xff; |
| 20 | mac[4] |= (serial >> 8) & 0xff; |
| 21 | mac[3] |= (serial >> 16) & 0xff; |
| 22 | } |
| 23 | dt_add_bin_prop(node, "local-mac-address", mac, 6); |
| 24 | } |
| 25 | |
| 26 | static void fixup_mac(struct device_tree_node *parent) |
| 27 | { |
| 28 | struct device_tree_property *prop; |
| 29 | const char *name = "local-mac-address"; |
| 30 | |
| 31 | list_for_each(prop, parent->properties, list_node) { |
| 32 | if (!strcmp(name, prop->prop.name)) |
| 33 | do_fixup_mac(parent); |
| 34 | } |
| 35 | |
| 36 | struct device_tree_node *child; |
| 37 | list_for_each(child, parent->children, list_node) { |
| 38 | fixup_mac(child); |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | static void do_fixup_memory(struct device_tree_node *node) |
| 43 | { |
| 44 | u64 addrs[1], sizes[1]; |
| 45 | addrs[0] = 0x80000000; |
| 46 | sizes[0] = sdram_size(); |
| 47 | dt_add_reg_prop(node, addrs, sizes, 1, 2, 2); |
| 48 | } |
| 49 | |
| 50 | static void fixup_memory(struct device_tree_node *parent) |
| 51 | { |
| 52 | struct device_tree_property *prop; |
| 53 | const char *name = "device_type"; |
| 54 | const char *value = "memory"; |
| 55 | |
| 56 | list_for_each(prop, parent->properties, list_node) { |
| 57 | if (!strcmp(name, prop->prop.name)) { |
| 58 | if (!strcmp(value, (char *)prop->prop.data)) |
| 59 | do_fixup_memory(parent); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | struct device_tree_node *child; |
| 64 | list_for_each(child, parent->children, list_node) { |
| 65 | fixup_memory(child); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | static void fixup_fdt(void *unused) |
| 70 | { |
| 71 | printk(BIOS_DEBUG, "fix up FDT\n"); |
| 72 | |
| 73 | void *fdt_rom; |
| 74 | struct device_tree *tree; |
| 75 | |
| 76 | /* load flat dt from cbfs */ |
| 77 | fdt_rom = cbfs_map("fallback/DTB", NULL); |
| 78 | |
| 79 | if (fdt_rom == NULL) { |
| 80 | printk(BIOS_ERR, "Unable to load fallback/DTB from CBFS\n"); |
| 81 | return; |
| 82 | } |
| 83 | |
| 84 | /* Expand DT into a tree */ |
| 85 | tree = fdt_unflatten(fdt_rom); |
| 86 | |
| 87 | /* fixup tree */ |
| 88 | fixup_mac(tree->root); |
| 89 | fixup_memory(tree->root); |
| 90 | |
| 91 | /* convert the tree to a flat dt */ |
| 92 | void *dt = malloc(dt_flat_size(tree)); |
| 93 | |
| 94 | if (dt == NULL) { |
| 95 | printk(BIOS_ERR, "Unable to allocate memory for flat device tree\n"); |
| 96 | return; |
| 97 | } |
| 98 | |
| 99 | dt_flatten(tree, dt); |
| 100 | |
| 101 | /* update HLS */ |
| 102 | for (int i = 0; i < CONFIG_MAX_CPUS; i++) |
| 103 | OTHER_HLS(i)->fdt = dt; |
| 104 | } |
| 105 | |
| 106 | BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_EXIT, fixup_fdt, NULL); |