| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <stdint.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <console/console.h> |
| #include <soc/otp.h> |
| #include <soc/sdram.h> |
| #include <cbfs.h> |
| #include <device_tree.h> |
| #include <bootstate.h> |
| #include <mcall.h> |
| |
| static void do_fixup_mac(struct device_tree_node *node) |
| { |
| uint32_t serial = otp_read_serial(); |
| static unsigned char mac[6] = { 0x70, 0xb3, 0xd5, 0x92, 0xf0, 0x00 }; |
| if (serial != ~0) { |
| mac[5] |= (serial >> 0) & 0xff; |
| mac[4] |= (serial >> 8) & 0xff; |
| mac[3] |= (serial >> 16) & 0xff; |
| } |
| dt_add_bin_prop(node, "local-mac-address", mac, 6); |
| } |
| |
| static void fixup_mac(struct device_tree_node *parent) |
| { |
| struct device_tree_property *prop; |
| const char *name = "local-mac-address"; |
| |
| list_for_each(prop, parent->properties, list_node) { |
| if (!strcmp(name, prop->prop.name)) |
| do_fixup_mac(parent); |
| } |
| |
| struct device_tree_node *child; |
| list_for_each(child, parent->children, list_node) { |
| fixup_mac(child); |
| } |
| } |
| |
| static void do_fixup_memory(struct device_tree_node *node) |
| { |
| u64 addrs[1], sizes[1]; |
| addrs[0] = 0x80000000; |
| sizes[0] = sdram_size_mb() * 1024 * 1024; |
| dt_add_reg_prop(node, addrs, sizes, 1, 2, 2); |
| } |
| |
| static void fixup_memory(struct device_tree_node *parent) |
| { |
| struct device_tree_property *prop; |
| const char *name = "device_type"; |
| const char *value = "memory"; |
| |
| list_for_each(prop, parent->properties, list_node) { |
| if (!strcmp(name, prop->prop.name)) { |
| if (!strcmp(value, (char *)prop->prop.data)) |
| do_fixup_memory(parent); |
| } |
| } |
| |
| struct device_tree_node *child; |
| list_for_each(child, parent->children, list_node) { |
| fixup_memory(child); |
| } |
| } |
| |
| static void fixup_fdt(void *unused) |
| { |
| void *fdt_rom; |
| struct device_tree *tree; |
| |
| /* load flat dt from cbfs */ |
| fdt_rom = cbfs_map("fallback/DTB", NULL); |
| |
| if (fdt_rom == NULL) { |
| printk(BIOS_ERR, "Unable to load fallback/DTB from CBFS\n"); |
| return; |
| } |
| |
| /* Expand DT into a tree */ |
| tree = fdt_unflatten(fdt_rom); |
| |
| /* fixup tree */ |
| fixup_mac(tree->root); |
| fixup_memory(tree->root); |
| |
| /* convert the tree to a flat dt */ |
| void *dt = malloc(dt_flat_size(tree)); |
| |
| if (dt == NULL) { |
| printk(BIOS_ERR, "Unable to allocate memory for flat device tree\n"); |
| return; |
| } |
| |
| dt_flatten(tree, dt); |
| |
| /* update HLS */ |
| for (int i = 0; i < CONFIG_MAX_CPUS; i++) |
| OTHER_HLS(i)->fdt = dt; |
| } |
| |
| BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_EXIT, fixup_fdt, NULL); |