+#ifdef CONFIG_EFI
+static int setup_efi_info_memmap(struct boot_params *params,
+ unsigned long params_load_addr,
+ unsigned int efi_map_offset,
+ unsigned int efi_map_sz)
+{
+ void *efi_map = (void *)params + efi_map_offset;
+ unsigned long efi_map_phys_addr = params_load_addr + efi_map_offset;
+ struct efi_info *ei = ¶ms->efi_info;
+
+ if (!efi_map_sz)
+ return 0;
+
+ efi_runtime_map_copy(efi_map, efi_map_sz);
+
+ ei->efi_memmap = efi_map_phys_addr & 0xffffffff;
+ ei->efi_memmap_hi = efi_map_phys_addr >> 32;
+ ei->efi_memmap_size = efi_map_sz;
+
+ return 0;
+}
+
+static int
+prepare_add_efi_setup_data(struct boot_params *params,
+ unsigned long params_load_addr,
+ unsigned int efi_setup_data_offset)
+{
+ unsigned long setup_data_phys;
+ struct setup_data *sd = (void *)params + efi_setup_data_offset;
+ struct efi_setup_data *esd = (void *)sd + sizeof(struct setup_data);
+
+ esd->fw_vendor = efi.fw_vendor;
+ esd->runtime = efi.runtime;
+ esd->tables = efi.config_table;
+ esd->smbios = efi.smbios;
+
+ sd->type = SETUP_EFI;
+ sd->len = sizeof(struct efi_setup_data);
+
+ /* Add setup data */
+ setup_data_phys = params_load_addr + efi_setup_data_offset;
+ sd->next = params->hdr.setup_data;
+ params->hdr.setup_data = setup_data_phys;
+
+ return 0;
+}
+
+static int
+setup_efi_state(struct boot_params *params, unsigned long params_load_addr,
+ unsigned int efi_map_offset, unsigned int efi_map_sz,
+ unsigned int efi_setup_data_offset)
+{
+ struct efi_info *current_ei = &boot_params.efi_info;
+ struct efi_info *ei = ¶ms->efi_info;
+
+ if (!current_ei->efi_memmap_size)
+ return 0;
+
+ /*
+ * If 1:1 mapping is not enabled, second kernel can not setup EFI
+ * and use EFI run time services. User space will have to pass
+ * acpi_rsdp=<addr> on kernel command line to make second kernel boot
+ * without efi.
+ */
+ if (efi_enabled(EFI_OLD_MEMMAP))
+ return 0;
+
+ ei->efi_loader_signature = current_ei->efi_loader_signature;
+ ei->efi_systab = current_ei->efi_systab;
+ ei->efi_systab_hi = current_ei->efi_systab_hi;
+
+ ei->efi_memdesc_version = current_ei->efi_memdesc_version;
+ ei->efi_memdesc_size = efi_get_runtime_map_desc_size();
+
+ setup_efi_info_memmap(params, params_load_addr, efi_map_offset,
+ efi_map_sz);
+ prepare_add_efi_setup_data(params, params_load_addr,
+ efi_setup_data_offset);
+ return 0;
+}
+#endif /* CONFIG_EFI */
+
+static int
+setup_boot_parameters(struct kimage *image, struct boot_params *params,
+ unsigned long params_load_addr,
+ unsigned int efi_map_offset, unsigned int efi_map_sz,
+ unsigned int efi_setup_data_offset)