| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <cbfs.h> |
| #include <commonlib/bsd/compression.h> |
| #include <console/console.h> |
| #include <bootmem.h> |
| #include <cbmem.h> |
| #include <device/resource.h> |
| #include <stdlib.h> |
| #include <commonlib/region.h> |
| #include <fit.h> |
| #include <program_loading.h> |
| #include <timestamp.h> |
| #include <string.h> |
| #include <lib.h> |
| #include <boardid.h> |
| |
| /* Pack the device_tree and place it at given position. */ |
| static void pack_fdt(struct region *fdt, struct device_tree *dt) |
| { |
| printk(BIOS_INFO, "FIT: Flattening FDT to %p\n", |
| (void *)fdt->offset); |
| |
| dt_flatten(dt, (void *)fdt->offset); |
| prog_segment_loaded(fdt->offset, fdt->size, 0); |
| } |
| |
| /** |
| * Extract a node to given regions. |
| * Returns true on error, false on success. |
| */ |
| static bool extract(struct region *region, struct fit_image_node *node) |
| { |
| void *dst = (void *)region->offset; |
| const char *comp_name; |
| size_t true_size = 0; |
| |
| if (node->size == 0) { |
| printk(BIOS_ERR, "ERROR: The %s size is 0\n", node->name); |
| return true; |
| } |
| |
| switch (node->compression) { |
| case CBFS_COMPRESS_NONE: |
| comp_name = "Relocating uncompressed"; |
| break; |
| case CBFS_COMPRESS_LZMA: |
| comp_name = "Decompressing LZMA"; |
| break; |
| case CBFS_COMPRESS_LZ4: |
| comp_name = "Decompressing LZ4"; |
| break; |
| default: |
| printk(BIOS_ERR, "ERROR: Unsupported compression\n"); |
| return true; |
| } |
| |
| printk(BIOS_INFO, "FIT: %s %s to %p\n", comp_name, node->name, dst); |
| |
| switch (node->compression) { |
| case CBFS_COMPRESS_NONE: |
| memcpy(dst, node->data, node->size); |
| true_size = node->size; |
| break; |
| case CBFS_COMPRESS_LZMA: |
| timestamp_add_now(TS_START_ULZMA); |
| true_size = ulzman(node->data, node->size, dst, region->size); |
| timestamp_add_now(TS_END_ULZMA); |
| break; |
| case CBFS_COMPRESS_LZ4: |
| timestamp_add_now(TS_START_ULZ4F); |
| true_size = ulz4fn(node->data, node->size, dst, region->size); |
| timestamp_add_now(TS_END_ULZ4F); |
| break; |
| default: |
| return true; |
| } |
| |
| if (!true_size) { |
| printk(BIOS_ERR, "ERROR: %s decompression failed!\n", |
| comp_name); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static struct device_tree *unpack_fdt(struct fit_image_node *image_node) |
| { |
| void *data = image_node->data; |
| |
| if (image_node->compression != CBFS_COMPRESS_NONE) { |
| /* TODO: This is an ugly heuristic for how much the size will |
| expand on decompression, fix once FIT images support storing |
| the real uncompressed size. */ |
| struct region r = { .offset = 0, .size = image_node->size * 5 }; |
| data = malloc(r.size); |
| r.offset = (uintptr_t)data; |
| if (!data || extract(&r, image_node)) |
| return NULL; |
| } |
| |
| return fdt_unflatten(data); |
| } |
| |
| /** |
| * Add coreboot tables, CBMEM information and optional board specific strapping |
| * IDs to the device tree loaded via FIT. |
| */ |
| static void add_cb_fdt_data(struct device_tree *tree) |
| { |
| u32 addr_cells = 1, size_cells = 1; |
| u64 reg_addrs[2], reg_sizes[2]; |
| void *baseptr = NULL; |
| size_t size = 0; |
| |
| static const char *firmware_path[] = {"firmware", NULL}; |
| struct device_tree_node *firmware_node = dt_find_node(tree->root, |
| firmware_path, &addr_cells, &size_cells, 1); |
| |
| /* Need to add 'ranges' to the intermediate node to make 'reg' work. */ |
| dt_add_bin_prop(firmware_node, "ranges", NULL, 0); |
| |
| static const char *coreboot_path[] = {"coreboot", NULL}; |
| struct device_tree_node *coreboot_node = dt_find_node(firmware_node, |
| coreboot_path, &addr_cells, &size_cells, 1); |
| |
| dt_add_string_prop(coreboot_node, "compatible", "coreboot"); |
| |
| /* Fetch CB tables from cbmem */ |
| void *cbtable = cbmem_find(CBMEM_ID_CBTABLE); |
| if (!cbtable) { |
| printk(BIOS_WARNING, "FIT: No coreboot table found!\n"); |
| return; |
| } |
| |
| /* First 'reg' address range is the coreboot table. */ |
| const struct lb_header *header = cbtable; |
| reg_addrs[0] = (uintptr_t)header; |
| reg_sizes[0] = header->header_bytes + header->table_bytes; |
| |
| /* Second is the CBMEM area (which usually includes the coreboot |
| table). */ |
| cbmem_get_region(&baseptr, &size); |
| if (!baseptr || size == 0) { |
| printk(BIOS_WARNING, "FIT: CBMEM pointer/size not found!\n"); |
| return; |
| } |
| |
| reg_addrs[1] = (uintptr_t)baseptr; |
| reg_sizes[1] = size; |
| |
| dt_add_reg_prop(coreboot_node, reg_addrs, reg_sizes, 2, addr_cells, |
| size_cells); |
| |
| /* Expose board ID, SKU ID, and RAM code to payload.*/ |
| if (board_id() != UNDEFINED_STRAPPING_ID) |
| dt_add_u32_prop(coreboot_node, "board-id", board_id()); |
| |
| if (sku_id() != UNDEFINED_STRAPPING_ID) |
| dt_add_u32_prop(coreboot_node, "sku-id", sku_id()); |
| |
| if (ram_code() != UNDEFINED_STRAPPING_ID) |
| dt_add_u32_prop(coreboot_node, "ram-code", ram_code()); |
| } |
| |
| /* |
| * Parse the uImage FIT, choose a configuration and extract images. |
| */ |
| void fit_payload(struct prog *payload, void *data) |
| { |
| struct device_tree *dt = NULL; |
| struct region kernel = {0}, fdt = {0}, initrd = {0}; |
| |
| printk(BIOS_INFO, "FIT: Examine payload %s\n", payload->name); |
| |
| struct fit_config_node *config = fit_load(data); |
| |
| if (!config) { |
| printk(BIOS_ERR, "ERROR: Could not load FIT\n"); |
| return; |
| } |
| |
| dt = unpack_fdt(config->fdt); |
| if (!dt) { |
| printk(BIOS_ERR, "ERROR: Failed to unflatten the FDT.\n"); |
| return; |
| } |
| |
| struct fit_overlay_chain *chain; |
| list_for_each(chain, config->overlays, list_node) { |
| struct device_tree *overlay = unpack_fdt(chain->overlay); |
| if (!overlay || dt_apply_overlay(dt, overlay)) { |
| printk(BIOS_ERR, "ERROR: Failed to apply overlay %s!\n", |
| chain->overlay->name); |
| } |
| } |
| |
| dt_apply_fixups(dt); |
| |
| /* Insert coreboot specific information */ |
| add_cb_fdt_data(dt); |
| |
| /* Update device_tree */ |
| #if defined(CONFIG_LINUX_COMMAND_LINE) |
| fit_update_chosen(dt, (char *)CONFIG_LINUX_COMMAND_LINE); |
| #endif |
| fit_update_memory(dt); |
| |
| /* Collect infos for fit_payload_arch */ |
| kernel.size = config->kernel->size; |
| fdt.size = dt_flat_size(dt); |
| initrd.size = config->ramdisk ? config->ramdisk->size : 0; |
| |
| /* Invoke arch specific payload placement and fixups */ |
| if (!fit_payload_arch(payload, config, &kernel, &fdt, &initrd)) { |
| printk(BIOS_ERR, "ERROR: Failed to find free memory region\n"); |
| bootmem_dump_ranges(); |
| return; |
| } |
| |
| /* Update ramdisk location in FDT */ |
| if (config->ramdisk) |
| fit_add_ramdisk(dt, (void *)initrd.offset, initrd.size); |
| |
| /* Repack FDT for handoff to kernel */ |
| pack_fdt(&fdt, dt); |
| |
| if (config->ramdisk && |
| extract(&initrd, config->ramdisk)) { |
| printk(BIOS_ERR, "ERROR: Failed to extract initrd\n"); |
| prog_set_entry(payload, NULL, NULL); |
| return; |
| } |
| |
| timestamp_add_now(TS_KERNEL_DECOMPRESSION); |
| |
| if (extract(&kernel, config->kernel)) { |
| printk(BIOS_ERR, "ERROR: Failed to extract kernel\n"); |
| prog_set_entry(payload, NULL, NULL); |
| return; |
| } |
| |
| timestamp_add_now(TS_START_KERNEL); |
| } |