/* * EFI application boot time services * * Copyright (c) 2016 Alexander Graf * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; /* Task priority level */ static efi_uintn_t efi_tpl = TPL_APPLICATION; /* This list contains all the EFI objects our payload has access to */ LIST_HEAD(efi_obj_list); /* List of all events */ LIST_HEAD(efi_events); /* * If we're running on nasty systems (32bit ARM booting into non-EFI Linux) * we need to do trickery with caches. Since we don't want to break the EFI * aware boot path, only apply hacks when loading exiting directly (breaking * direct Linux EFI booting along the way - oh well). */ static bool efi_is_direct_boot = true; /* * EFI can pass arbitrary additional "tables" containing vendor specific * information to the payload. One such table is the FDT table which contains * a pointer to a flattened device tree blob. * * In most cases we want to pass an FDT to the payload, so reserve one slot of * config table space for it. The pointer gets populated by do_bootefi_exec(). */ static struct efi_configuration_table __efi_runtime_data efi_conf_table[2]; #ifdef CONFIG_ARM /* * The "gd" pointer lives in a register on ARM and AArch64 that we declare * fixed when compiling U-Boot. However, the payload does not know about that * restriction so we need to manually swap its and our view of that register on * EFI callback entry/exit. */ static volatile void *efi_gd, *app_gd; #endif static int entry_count; static int nesting_level; /* GUID of the device tree table */ const efi_guid_t efi_guid_fdt = EFI_FDT_GUID; /* GUID of the EFI_DRIVER_BINDING_PROTOCOL */ const efi_guid_t efi_guid_driver_binding_protocol = EFI_DRIVER_BINDING_PROTOCOL_GUID; /* event group ExitBootServices() invoked */ const efi_guid_t efi_guid_event_group_exit_boot_services = EFI_EVENT_GROUP_EXIT_BOOT_SERVICES; /* event group SetVirtualAddressMap() invoked */ const efi_guid_t efi_guid_event_group_virtual_address_change = EFI_EVENT_GROUP_VIRTUAL_ADDRESS_CHANGE; /* event group memory map changed */ const efi_guid_t efi_guid_event_group_memory_map_change = EFI_EVENT_GROUP_MEMORY_MAP_CHANGE; /* event group boot manager about to boot */ const efi_guid_t efi_guid_event_group_ready_to_boot = EFI_EVENT_GROUP_READY_TO_BOOT; /* event group ResetSystem() invoked (before ExitBootServices) */ const efi_guid_t efi_guid_event_group_reset_system = EFI_EVENT_GROUP_RESET_SYSTEM; static efi_status_t EFIAPI efi_disconnect_controller( efi_handle_t controller_handle, efi_handle_t driver_image_handle, efi_handle_t child_handle); /* Called on every callback entry */ int __efi_entry_check(void) { int ret = entry_count++ == 0; #ifdef CONFIG_ARM assert(efi_gd); app_gd = gd; gd = efi_gd; #endif return ret; } /* Called on every callback exit */ int __efi_exit_check(void) { int ret = --entry_count == 0; #ifdef CONFIG_ARM gd = app_gd; #endif return ret; } /* Called from do_bootefi_exec() */ void efi_save_gd(void) { #ifdef CONFIG_ARM efi_gd = gd; #endif } /* * Special case handler for error/abort that just forces things back * to u-boot world so we can dump out an abort msg, without any care * about returning back to UEFI world. */ void efi_restore_gd(void) { #ifdef CONFIG_ARM /* Only restore if we're already in EFI context */ if (!efi_gd) return; gd = efi_gd; #endif } /* * Return a string for indenting with two spaces per level. A maximum of ten * indent levels is supported. Higher indent levels will be truncated. * * @level indent level * @return indent string */ static const char *indent_string(int level) { const char *indent = " "; const int max = strlen(indent); level = min(max, level * 2); return &indent[max - level]; } const char *__efi_nesting(void) { return indent_string(nesting_level); } const char *__efi_nesting_inc(void) { return indent_string(nesting_level++); } const char *__efi_nesting_dec(void) { return indent_string(--nesting_level); } /* * Queue an EFI event. * * This function queues the notification function of the event for future * execution. * * The notification function is called if the task priority level of the * event is higher than the current task priority level. * * For the SignalEvent service see efi_signal_event_ext. * * @event event to signal * @check_tpl check the TPL level */ static void efi_queue_event(struct efi_event *event, bool check_tpl) { if (event->notify_function) { event->is_queued = true; /* Check TPL */ if (check_tpl && efi_tpl >= event->notify_tpl) return; EFI_CALL_VOID(event->notify_function(event, event->notify_context)); } event->is_queued = false; } /* * Signal an EFI event. * * This function signals an event. If the event belongs to an event group * all events of the group are signaled. If they are of type EVT_NOTIFY_SIGNAL * their notification function is queued. * * For the SignalEvent service see efi_signal_event_ext. * * @event event to signal * @check_tpl check the TPL level */ void efi_signal_event(struct efi_event *event, bool check_tpl) { if (event->group) { struct efi_event *evt; /* * The signaled state has to set before executing any * notification function */ list_for_each_entry(evt, &efi_events, link) { if (!evt->group || guidcmp(evt->group, event->group)) continue; if (evt->is_signaled) continue; evt->is_signaled = true; if (evt->type & EVT_NOTIFY_SIGNAL && evt->notify_function) evt->is_queued = true; } list_for_each_entry(evt, &efi_events, link) { if (!evt->group || guidcmp(evt->group, event->group)) continue; if (evt->is_queued) efi_queue_event(evt, check_tpl); } } else if (!event->is_signaled) { event->is_signaled = true; if (event->type & EVT_NOTIFY_SIGNAL) efi_queue_event(event, check_tpl); } } /* * Raise the task priority level. * * This function implements the RaiseTpl service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @new_tpl new value of the task priority level * @return old value of the task priority level */ static unsigned long EFIAPI efi_raise_tpl(efi_uintn_t new_tpl) { efi_uintn_t old_tpl = efi_tpl; EFI_ENTRY("0x%zx", new_tpl); if (new_tpl < efi_tpl) debug("WARNING: new_tpl < current_tpl in %s\n", __func__); efi_tpl = new_tpl; if (efi_tpl > TPL_HIGH_LEVEL) efi_tpl = TPL_HIGH_LEVEL; EFI_EXIT(EFI_SUCCESS); return old_tpl; } /* * Lower the task priority level. * * This function implements the RestoreTpl service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @old_tpl value of the task priority level to be restored */ static void EFIAPI efi_restore_tpl(efi_uintn_t old_tpl) { EFI_ENTRY("0x%zx", old_tpl); if (old_tpl > efi_tpl) debug("WARNING: old_tpl > current_tpl in %s\n", __func__); efi_tpl = old_tpl; if (efi_tpl > TPL_HIGH_LEVEL) efi_tpl = TPL_HIGH_LEVEL; EFI_EXIT(EFI_SUCCESS); } /* * Allocate memory pages. * * This function implements the AllocatePages service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @type type of allocation to be performed * @memory_type usage type of the allocated memory * @pages number of pages to be allocated * @memory allocated memory * @return status code */ static efi_status_t EFIAPI efi_allocate_pages_ext(int type, int memory_type, efi_uintn_t pages, uint64_t *memory) { efi_status_t r; EFI_ENTRY("%d, %d, 0x%zx, %p", type, memory_type, pages, memory); r = efi_allocate_pages(type, memory_type, pages, memory); return EFI_EXIT(r); } /* * Free memory pages. * * This function implements the FreePages service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @memory start of the memory area to be freed * @pages number of pages to be freed * @return status code */ static efi_status_t EFIAPI efi_free_pages_ext(uint64_t memory, efi_uintn_t pages) { efi_status_t r; EFI_ENTRY("%" PRIx64 ", 0x%zx", memory, pages); r = efi_free_pages(memory, pages); return EFI_EXIT(r); } /* * Get map describing memory usage. * * This function implements the GetMemoryMap service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @memory_map_size on entry the size, in bytes, of the memory map buffer, * on exit the size of the copied memory map * @memory_map buffer to which the memory map is written * @map_key key for the memory map * @descriptor_size size of an individual memory descriptor * @descriptor_version version number of the memory descriptor structure * @return status code */ static efi_status_t EFIAPI efi_get_memory_map_ext( efi_uintn_t *memory_map_size, struct efi_mem_desc *memory_map, efi_uintn_t *map_key, efi_uintn_t *descriptor_size, uint32_t *descriptor_version) { efi_status_t r; EFI_ENTRY("%p, %p, %p, %p, %p", memory_map_size, memory_map, map_key, descriptor_size, descriptor_version); r = efi_get_memory_map(memory_map_size, memory_map, map_key, descriptor_size, descriptor_version); return EFI_EXIT(r); } /* * Allocate memory from pool. * * This function implements the AllocatePool service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @pool_type type of the pool from which memory is to be allocated * @size number of bytes to be allocated * @buffer allocated memory * @return status code */ static efi_status_t EFIAPI efi_allocate_pool_ext(int pool_type, efi_uintn_t size, void **buffer) { efi_status_t r; EFI_ENTRY("%d, %zd, %p", pool_type, size, buffer); r = efi_allocate_pool(pool_type, size, buffer); return EFI_EXIT(r); } /* * Free memory from pool. * * This function implements the FreePool service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @buffer start of memory to be freed * @return status code */ static efi_status_t EFIAPI efi_free_pool_ext(void *buffer) { efi_status_t r; EFI_ENTRY("%p", buffer); r = efi_free_pool(buffer); return EFI_EXIT(r); } /* * Add a new object to the object list. * * The protocols list is initialized. * The object handle is set. * * @obj object to be added */ void efi_add_handle(struct efi_object *obj) { if (!obj) return; INIT_LIST_HEAD(&obj->protocols); obj->handle = obj; list_add_tail(&obj->link, &efi_obj_list); } /* * Create handle. * * @handle new handle * @return status code */ efi_status_t efi_create_handle(efi_handle_t *handle) { struct efi_object *obj; efi_status_t r; r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, sizeof(struct efi_object), (void **)&obj); if (r != EFI_SUCCESS) return r; efi_add_handle(obj); *handle = obj->handle; return r; } /* * Find a protocol on a handle. * * @handle handle * @protocol_guid GUID of the protocol * @handler reference to the protocol * @return status code */ efi_status_t efi_search_protocol(const efi_handle_t handle, const efi_guid_t *protocol_guid, struct efi_handler **handler) { struct efi_object *efiobj; struct list_head *lhandle; if (!handle || !protocol_guid) return EFI_INVALID_PARAMETER; efiobj = efi_search_obj(handle); if (!efiobj) return EFI_INVALID_PARAMETER; list_for_each(lhandle, &efiobj->protocols) { struct efi_handler *protocol; protocol = list_entry(lhandle, struct efi_handler, link); if (!guidcmp(protocol->guid, protocol_guid)) { if (handler) *handler = protocol; return EFI_SUCCESS; } } return EFI_NOT_FOUND; } /* * Delete protocol from a handle. * * @handle handle from which the protocol shall be deleted * @protocol GUID of the protocol to be deleted * @protocol_interface interface of the protocol implementation * @return status code */ efi_status_t efi_remove_protocol(const efi_handle_t handle, const efi_guid_t *protocol, void *protocol_interface) { struct efi_handler *handler; efi_status_t ret; ret = efi_search_protocol(handle, protocol, &handler); if (ret != EFI_SUCCESS) return ret; if (guidcmp(handler->guid, protocol)) return EFI_INVALID_PARAMETER; list_del(&handler->link); free(handler); return EFI_SUCCESS; } /* * Delete all protocols from a handle. * * @handle handle from which the protocols shall be deleted * @return status code */ efi_status_t efi_remove_all_protocols(const efi_handle_t handle) { struct efi_object *efiobj; struct efi_handler *protocol; struct efi_handler *pos; efiobj = efi_search_obj(handle); if (!efiobj) return EFI_INVALID_PARAMETER; list_for_each_entry_safe(protocol, pos, &efiobj->protocols, link) { efi_status_t ret; ret = efi_remove_protocol(handle, protocol->guid, protocol->protocol_interface); if (ret != EFI_SUCCESS) return ret; } return EFI_SUCCESS; } /* * Delete handle. * * @handle handle to delete */ void efi_delete_handle(struct efi_object *obj) { if (!obj) return; efi_remove_all_protocols(obj->handle); list_del(&obj->link); free(obj); } /* * Check if a pointer is a valid event. * * @event pointer to check * @return status code */ static efi_status_t efi_is_event(const struct efi_event *event) { const struct efi_event *evt; if (!event) return EFI_INVALID_PARAMETER; list_for_each_entry(evt, &efi_events, link) { if (evt == event) return EFI_SUCCESS; } return EFI_INVALID_PARAMETER; } /* * Create an event. * * This function is used inside U-Boot code to create an event. * * For the API function implementing the CreateEvent service see * efi_create_event_ext. * * @type type of the event to create * @notify_tpl task priority level of the event * @notify_function notification function of the event * @notify_context pointer passed to the notification function * @event created event * @return status code */ efi_status_t efi_create_event(uint32_t type, efi_uintn_t notify_tpl, void (EFIAPI *notify_function) ( struct efi_event *event, void *context), void *notify_context, efi_guid_t *group, struct efi_event **event) { struct efi_event *evt; if (event == NULL) return EFI_INVALID_PARAMETER; if ((type & EVT_NOTIFY_SIGNAL) && (type & EVT_NOTIFY_WAIT)) return EFI_INVALID_PARAMETER; if ((type & (EVT_NOTIFY_SIGNAL | EVT_NOTIFY_WAIT)) && notify_function == NULL) return EFI_INVALID_PARAMETER; evt = calloc(1, sizeof(struct efi_event)); if (!evt) return EFI_OUT_OF_RESOURCES; evt->type = type; evt->notify_tpl = notify_tpl; evt->notify_function = notify_function; evt->notify_context = notify_context; evt->group = group; /* Disable timers on bootup */ evt->trigger_next = -1ULL; evt->is_queued = false; evt->is_signaled = false; list_add_tail(&evt->link, &efi_events); *event = evt; return EFI_SUCCESS; } /* * Create an event in a group. * * This function implements the CreateEventEx service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * TODO: Support event groups * * @type type of the event to create * @notify_tpl task priority level of the event * @notify_function notification function of the event * @notify_context pointer passed to the notification function * @event created event * @event_group event group * @return status code */ efi_status_t EFIAPI efi_create_event_ex(uint32_t type, efi_uintn_t notify_tpl, void (EFIAPI *notify_function) ( struct efi_event *event, void *context), void *notify_context, efi_guid_t *event_group, struct efi_event **event) { EFI_ENTRY("%d, 0x%zx, %p, %p, %pUl", type, notify_tpl, notify_function, notify_context, event_group); return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function, notify_context, event_group, event)); } /* * Create an event. * * This function implements the CreateEvent service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @type type of the event to create * @notify_tpl task priority level of the event * @notify_function notification function of the event * @notify_context pointer passed to the notification function * @event created event * @return status code */ static efi_status_t EFIAPI efi_create_event_ext( uint32_t type, efi_uintn_t notify_tpl, void (EFIAPI *notify_function) ( struct efi_event *event, void *context), void *notify_context, struct efi_event **event) { EFI_ENTRY("%d, 0x%zx, %p, %p", type, notify_tpl, notify_function, notify_context); return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function, notify_context, NULL, event)); } /* * Check if a timer event has occurred or a queued notification function should * be called. * * Our timers have to work without interrupts, so we check whenever keyboard * input or disk accesses happen if enough time elapsed for them to fire. */ void efi_timer_check(void) { struct efi_event *evt; u64 now = timer_get_us(); list_for_each_entry(evt, &efi_events, link) { if (evt->is_queued) efi_queue_event(evt, true); if (!(evt->type & EVT_TIMER) || now < evt->trigger_next) continue; switch (evt->trigger_type) { case EFI_TIMER_RELATIVE: evt->trigger_type = EFI_TIMER_STOP; break; case EFI_TIMER_PERIODIC: evt->trigger_next += evt->trigger_time; break; default: continue; } evt->is_signaled = false; efi_signal_event(evt, true); } WATCHDOG_RESET(); } /* * Set the trigger time for a timer event or stop the event. * * This is the function for internal usage in U-Boot. For the API function * implementing the SetTimer service see efi_set_timer_ext. * * @event event for which the timer is set * @type type of the timer * @trigger_time trigger period in multiples of 100ns * @return status code */ efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type, uint64_t trigger_time) { /* Check that the event is valid */ if (efi_is_event(event) != EFI_SUCCESS || !(event->type & EVT_TIMER)) return EFI_INVALID_PARAMETER; /* * The parameter defines a multiple of 100ns. * We use multiples of 1000ns. So divide by 10. */ do_div(trigger_time, 10); switch (type) { case EFI_TIMER_STOP: event->trigger_next = -1ULL; break; case EFI_TIMER_PERIODIC: case EFI_TIMER_RELATIVE: event->trigger_next = timer_get_us() + trigger_time; break; default: return EFI_INVALID_PARAMETER; } event->trigger_type = type; event->trigger_time = trigger_time; event->is_signaled = false; return EFI_SUCCESS; } /* * Set the trigger time for a timer event or stop the event. * * This function implements the SetTimer service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @event event for which the timer is set * @type type of the timer * @trigger_time trigger period in multiples of 100ns * @return status code */ static efi_status_t EFIAPI efi_set_timer_ext(struct efi_event *event, enum efi_timer_delay type, uint64_t trigger_time) { EFI_ENTRY("%p, %d, %" PRIx64, event, type, trigger_time); return EFI_EXIT(efi_set_timer(event, type, trigger_time)); } /* * Wait for events to be signaled. * * This function implements the WaitForEvent service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @num_events number of events to be waited for * @events events to be waited for * @index index of the event that was signaled * @return status code */ static efi_status_t EFIAPI efi_wait_for_event(efi_uintn_t num_events, struct efi_event **event, efi_uintn_t *index) { int i; EFI_ENTRY("%zd, %p, %p", num_events, event, index); /* Check parameters */ if (!num_events || !event) return EFI_EXIT(EFI_INVALID_PARAMETER); /* Check TPL */ if (efi_tpl != TPL_APPLICATION) return EFI_EXIT(EFI_UNSUPPORTED); for (i = 0; i < num_events; ++i) { if (efi_is_event(event[i]) != EFI_SUCCESS) return EFI_EXIT(EFI_INVALID_PARAMETER); if (!event[i]->type || event[i]->type & EVT_NOTIFY_SIGNAL) return EFI_EXIT(EFI_INVALID_PARAMETER); if (!event[i]->is_signaled) efi_queue_event(event[i], true); } /* Wait for signal */ for (;;) { for (i = 0; i < num_events; ++i) { if (event[i]->is_signaled) goto out; } /* Allow events to occur. */ efi_timer_check(); } out: /* * Reset the signal which is passed to the caller to allow periodic * events to occur. */ event[i]->is_signaled = false; if (index) *index = i; return EFI_EXIT(EFI_SUCCESS); } /* * Signal an EFI event. * * This function implements the SignalEvent service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * This functions sets the signaled state of the event and queues the * notification function for execution. * * @event event to signal * @return status code */ static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event) { EFI_ENTRY("%p", event); if (efi_is_event(event) != EFI_SUCCESS) return EFI_EXIT(EFI_INVALID_PARAMETER); efi_signal_event(event, true); return EFI_EXIT(EFI_SUCCESS); } /* * Close an EFI event. * * This function implements the CloseEvent service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @event event to close * @return status code */ static efi_status_t EFIAPI efi_close_event(struct efi_event *event) { EFI_ENTRY("%p", event); if (efi_is_event(event) != EFI_SUCCESS) return EFI_EXIT(EFI_INVALID_PARAMETER); list_del(&event->link); free(event); return EFI_EXIT(EFI_SUCCESS); } /* * Check if an event is signaled. * * This function implements the CheckEvent service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * If an event is not signaled yet, the notification function is queued. * The signaled state is cleared. * * @event event to check * @return status code */ static efi_status_t EFIAPI efi_check_event(struct efi_event *event) { EFI_ENTRY("%p", event); efi_timer_check(); if (efi_is_event(event) != EFI_SUCCESS || event->type & EVT_NOTIFY_SIGNAL) return EFI_EXIT(EFI_INVALID_PARAMETER); if (!event->is_signaled) efi_queue_event(event, true); if (event->is_signaled) { event->is_signaled = false; return EFI_EXIT(EFI_SUCCESS); } return EFI_EXIT(EFI_NOT_READY); } /* * Find the internal EFI object for a handle. * * @handle handle to find * @return EFI object */ struct efi_object *efi_search_obj(const efi_handle_t handle) { struct efi_object *efiobj; list_for_each_entry(efiobj, &efi_obj_list, link) { if (efiobj->handle == handle) return efiobj; } return NULL; } /* * Create open protocol info entry and add it to a protocol. * * @handler handler of a protocol * @return open protocol info entry */ static struct efi_open_protocol_info_entry *efi_create_open_info( struct efi_handler *handler) { struct efi_open_protocol_info_item *item; item = calloc(1, sizeof(struct efi_open_protocol_info_item)); if (!item) return NULL; /* Append the item to the open protocol info list. */ list_add_tail(&item->link, &handler->open_infos); return &item->info; } /* * Remove an open protocol info entry from a protocol. * * @handler handler of a protocol * @return status code */ static efi_status_t efi_delete_open_info( struct efi_open_protocol_info_item *item) { list_del(&item->link); free(item); return EFI_SUCCESS; } /* * Install new protocol on a handle. * * @handle handle on which the protocol shall be installed * @protocol GUID of the protocol to be installed * @protocol_interface interface of the protocol implementation * @return status code */ efi_status_t efi_add_protocol(const efi_handle_t handle, const efi_guid_t *protocol, void *protocol_interface) { struct efi_object *efiobj; struct efi_handler *handler; efi_status_t ret; efiobj = efi_search_obj(handle); if (!efiobj) return EFI_INVALID_PARAMETER; ret = efi_search_protocol(handle, protocol, NULL); if (ret != EFI_NOT_FOUND) return EFI_INVALID_PARAMETER; handler = calloc(1, sizeof(struct efi_handler)); if (!handler) return EFI_OUT_OF_RESOURCES; handler->guid = protocol; handler->protocol_interface = protocol_interface; INIT_LIST_HEAD(&handler->open_infos); list_add_tail(&handler->link, &efiobj->protocols); if (!guidcmp(&efi_guid_device_path, protocol)) EFI_PRINT("installed device path '%pD'\n", protocol_interface); return EFI_SUCCESS; } /* * Install protocol interface. * * This function implements the InstallProtocolInterface service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle on which the protocol shall be installed * @protocol GUID of the protocol to be installed * @protocol_interface_type type of the interface to be installed, * always EFI_NATIVE_INTERFACE * @protocol_interface interface of the protocol implementation * @return status code */ static efi_status_t EFIAPI efi_install_protocol_interface( void **handle, const efi_guid_t *protocol, int protocol_interface_type, void *protocol_interface) { efi_status_t r; EFI_ENTRY("%p, %pUl, %d, %p", handle, protocol, protocol_interface_type, protocol_interface); if (!handle || !protocol || protocol_interface_type != EFI_NATIVE_INTERFACE) { r = EFI_INVALID_PARAMETER; goto out; } /* Create new handle if requested. */ if (!*handle) { r = efi_create_handle(handle); if (r != EFI_SUCCESS) goto out; debug("%sEFI: new handle %p\n", indent_string(nesting_level), *handle); } else { debug("%sEFI: handle %p\n", indent_string(nesting_level), *handle); } /* Add new protocol */ r = efi_add_protocol(*handle, protocol, protocol_interface); out: return EFI_EXIT(r); } /* * Reinstall protocol interface. * * This function implements the ReinstallProtocolInterface service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle on which the protocol shall be * reinstalled * @protocol GUID of the protocol to be installed * @old_interface interface to be removed * @new_interface interface to be installed * @return status code */ static efi_status_t EFIAPI efi_reinstall_protocol_interface( efi_handle_t handle, const efi_guid_t *protocol, void *old_interface, void *new_interface) { EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, old_interface, new_interface); return EFI_EXIT(EFI_ACCESS_DENIED); } /* * Get all drivers associated to a controller. * The allocated buffer has to be freed with free(). * * @efiobj handle of the controller * @protocol protocol guid (optional) * @number_of_drivers number of child controllers * @driver_handle_buffer handles of the the drivers * @return status code */ static efi_status_t efi_get_drivers(struct efi_object *efiobj, const efi_guid_t *protocol, efi_uintn_t *number_of_drivers, efi_handle_t **driver_handle_buffer) { struct efi_handler *handler; struct efi_open_protocol_info_item *item; efi_uintn_t count = 0, i; bool duplicate; /* Count all driver associations */ list_for_each_entry(handler, &efiobj->protocols, link) { if (protocol && guidcmp(handler->guid, protocol)) continue; list_for_each_entry(item, &handler->open_infos, link) { if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) ++count; } } /* * Create buffer. In case of duplicate driver assignments the buffer * will be too large. But that does not harm. */ *number_of_drivers = 0; *driver_handle_buffer = calloc(count, sizeof(efi_handle_t)); if (!*driver_handle_buffer) return EFI_OUT_OF_RESOURCES; /* Collect unique driver handles */ list_for_each_entry(handler, &efiobj->protocols, link) { if (protocol && guidcmp(handler->guid, protocol)) continue; list_for_each_entry(item, &handler->open_infos, link) { if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) { /* Check this is a new driver */ duplicate = false; for (i = 0; i < *number_of_drivers; ++i) { if ((*driver_handle_buffer)[i] == item->info.agent_handle) duplicate = true; } /* Copy handle to buffer */ if (!duplicate) { i = (*number_of_drivers)++; (*driver_handle_buffer)[i] = item->info.agent_handle; } } } } return EFI_SUCCESS; } /* * Disconnect all drivers from a controller. * * This function implements the DisconnectController service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @efiobj handle of the controller * @protocol protocol guid (optional) * @child_handle handle of the child to destroy * @return status code */ static efi_status_t efi_disconnect_all_drivers( struct efi_object *efiobj, const efi_guid_t *protocol, efi_handle_t child_handle) { efi_uintn_t number_of_drivers; efi_handle_t *driver_handle_buffer; efi_status_t r, ret; ret = efi_get_drivers(efiobj, protocol, &number_of_drivers, &driver_handle_buffer); if (ret != EFI_SUCCESS) return ret; ret = EFI_NOT_FOUND; while (number_of_drivers) { r = EFI_CALL(efi_disconnect_controller( efiobj->handle, driver_handle_buffer[--number_of_drivers], child_handle)); if (r == EFI_SUCCESS) ret = r; } free(driver_handle_buffer); return ret; } /* * Uninstall protocol interface. * * This function implements the UninstallProtocolInterface service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle from which the protocol shall be removed * @protocol GUID of the protocol to be removed * @protocol_interface interface to be removed * @return status code */ static efi_status_t EFIAPI efi_uninstall_protocol_interface( efi_handle_t handle, const efi_guid_t *protocol, void *protocol_interface) { struct efi_object *efiobj; struct efi_handler *handler; struct efi_open_protocol_info_item *item; struct efi_open_protocol_info_item *pos; efi_status_t r; EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface); /* Check handle */ efiobj = efi_search_obj(handle); if (!efiobj) { r = EFI_INVALID_PARAMETER; goto out; } /* Find the protocol on the handle */ r = efi_search_protocol(handle, protocol, &handler); if (r != EFI_SUCCESS) goto out; /* Disconnect controllers */ efi_disconnect_all_drivers(efiobj, protocol, NULL); if (!list_empty(&handler->open_infos)) { r = EFI_ACCESS_DENIED; goto out; } /* Close protocol */ list_for_each_entry_safe(item, pos, &handler->open_infos, link) { if (item->info.attributes == EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL || item->info.attributes == EFI_OPEN_PROTOCOL_GET_PROTOCOL || item->info.attributes == EFI_OPEN_PROTOCOL_TEST_PROTOCOL) list_del(&item->link); } if (!list_empty(&handler->open_infos)) { r = EFI_ACCESS_DENIED; goto out; } r = efi_remove_protocol(handle, protocol, protocol_interface); out: return EFI_EXIT(r); } /* * Register an event for notification when a protocol is installed. * * This function implements the RegisterProtocolNotify service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @protocol GUID of the protocol whose installation shall be * notified * @event event to be signaled upon installation of the protocol * @registration key for retrieving the registration information * @return status code */ static efi_status_t EFIAPI efi_register_protocol_notify( const efi_guid_t *protocol, struct efi_event *event, void **registration) { EFI_ENTRY("%pUl, %p, %p", protocol, event, registration); return EFI_EXIT(EFI_OUT_OF_RESOURCES); } /* * Determine if an EFI handle implements a protocol. * * See the documentation of the LocateHandle service in the UEFI specification. * * @search_type selection criterion * @protocol GUID of the protocol * @search_key registration key * @efiobj handle * @return 0 if the handle implements the protocol */ static int efi_search(enum efi_locate_search_type search_type, const efi_guid_t *protocol, void *search_key, struct efi_object *efiobj) { efi_status_t ret; switch (search_type) { case ALL_HANDLES: return 0; case BY_REGISTER_NOTIFY: /* TODO: RegisterProtocolNotify is not implemented yet */ return -1; case BY_PROTOCOL: ret = efi_search_protocol(efiobj->handle, protocol, NULL); return (ret != EFI_SUCCESS); default: /* Invalid search type */ return -1; } } /* * Locate handles implementing a protocol. * * This function is meant for U-Boot internal calls. For the API implementation * of the LocateHandle service see efi_locate_handle_ext. * * @search_type selection criterion * @protocol GUID of the protocol * @search_key registration key * @buffer_size size of the buffer to receive the handles in bytes * @buffer buffer to receive the relevant handles * @return status code */ static efi_status_t efi_locate_handle( enum efi_locate_search_type search_type, const efi_guid_t *protocol, void *search_key, efi_uintn_t *buffer_size, efi_handle_t *buffer) { struct efi_object *efiobj; efi_uintn_t size = 0; /* Check parameters */ switch (search_type) { case ALL_HANDLES: break; case BY_REGISTER_NOTIFY: if (!search_key) return EFI_INVALID_PARAMETER; /* RegisterProtocolNotify is not implemented yet */ return EFI_UNSUPPORTED; case BY_PROTOCOL: if (!protocol) return EFI_INVALID_PARAMETER; break; default: return EFI_INVALID_PARAMETER; } /* * efi_locate_handle_buffer uses this function for * the calculation of the necessary buffer size. * So do not require a buffer for buffersize == 0. */ if (!buffer_size || (*buffer_size && !buffer)) return EFI_INVALID_PARAMETER; /* Count how much space we need */ list_for_each_entry(efiobj, &efi_obj_list, link) { if (!efi_search(search_type, protocol, search_key, efiobj)) size += sizeof(void *); } if (*buffer_size < size) { *buffer_size = size; return EFI_BUFFER_TOO_SMALL; } *buffer_size = size; if (size == 0) return EFI_NOT_FOUND; /* Then fill the array */ list_for_each_entry(efiobj, &efi_obj_list, link) { if (!efi_search(search_type, protocol, search_key, efiobj)) *buffer++ = efiobj->handle; } return EFI_SUCCESS; } /* * Locate handles implementing a protocol. * * This function implements the LocateHandle service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @search_type selection criterion * @protocol GUID of the protocol * @search_key registration key * @buffer_size size of the buffer to receive the handles in bytes * @buffer buffer to receive the relevant handles * @return 0 if the handle implements the protocol */ static efi_status_t EFIAPI efi_locate_handle_ext( enum efi_locate_search_type search_type, const efi_guid_t *protocol, void *search_key, efi_uintn_t *buffer_size, efi_handle_t *buffer) { EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key, buffer_size, buffer); return EFI_EXIT(efi_locate_handle(search_type, protocol, search_key, buffer_size, buffer)); } /* Collapses configuration table entries, removing index i */ static void efi_remove_configuration_table(int i) { struct efi_configuration_table *this = &efi_conf_table[i]; struct efi_configuration_table *next = &efi_conf_table[i + 1]; struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables]; memmove(this, next, (ulong)end - (ulong)next); systab.nr_tables--; } /* * Adds, updates, or removes a configuration table. * * This function is used for internal calls. For the API implementation of the * InstallConfigurationTable service see efi_install_configuration_table_ext. * * @guid GUID of the installed table * @table table to be installed * @return status code */ efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table) { struct efi_event *evt; int i; if (!guid) return EFI_INVALID_PARAMETER; /* Check for guid override */ for (i = 0; i < systab.nr_tables; i++) { if (!guidcmp(guid, &efi_conf_table[i].guid)) { if (table) efi_conf_table[i].table = table; else efi_remove_configuration_table(i); goto out; } } if (!table) return EFI_NOT_FOUND; /* No override, check for overflow */ if (i >= ARRAY_SIZE(efi_conf_table)) return EFI_OUT_OF_RESOURCES; /* Add a new entry */ memcpy(&efi_conf_table[i].guid, guid, sizeof(*guid)); efi_conf_table[i].table = table; systab.nr_tables = i + 1; out: /* Notify that the configuration table was changed */ list_for_each_entry(evt, &efi_events, link) { if (evt->group && !guidcmp(evt->group, guid)) { efi_signal_event(evt, false); break; } } return EFI_SUCCESS; } /* * Adds, updates, or removes a configuration table. * * This function implements the InstallConfigurationTable service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @guid GUID of the installed table * @table table to be installed * @return status code */ static efi_status_t EFIAPI efi_install_configuration_table_ext(efi_guid_t *guid, void *table) { EFI_ENTRY("%pUl, %p", guid, table); return EFI_EXIT(efi_install_configuration_table(guid, table)); } /* * Initialize a loaded_image_info + loaded_image_info object with correct * protocols, boot-device, etc. * * @info loaded image info to be passed to the entry point of the * image * @obj internal object associated with the loaded image * @device_path device path of the loaded image * @file_path file path of the loaded image * @return status code */ efi_status_t efi_setup_loaded_image( struct efi_loaded_image *info, struct efi_object *obj, struct efi_device_path *device_path, struct efi_device_path *file_path) { efi_status_t ret; /* Add internal object to object list */ efi_add_handle(obj); /* efi_exit() assumes that the handle points to the info */ obj->handle = info; info->file_path = file_path; if (device_path) { info->device_handle = efi_dp_find_obj(device_path, NULL); /* * When asking for the device path interface, return * bootefi_device_path */ ret = efi_add_protocol(obj->handle, &efi_guid_device_path, device_path); if (ret != EFI_SUCCESS) goto failure; } /* * When asking for the loaded_image interface, just * return handle which points to loaded_image_info */ ret = efi_add_protocol(obj->handle, &efi_guid_loaded_image, info); if (ret != EFI_SUCCESS) goto failure; ret = efi_add_protocol(obj->handle, &efi_guid_device_path_to_text_protocol, (void *)&efi_device_path_to_text); if (ret != EFI_SUCCESS) goto failure; ret = efi_add_protocol(obj->handle, &efi_guid_device_path_utilities_protocol, (void *)&efi_device_path_utilities); if (ret != EFI_SUCCESS) goto failure; return ret; failure: printf("ERROR: Failure to install protocols for loaded image\n"); return ret; } /* * Load an image using a file path. * * @file_path the path of the image to load * @buffer buffer containing the loaded image * @return status code */ efi_status_t efi_load_image_from_path(struct efi_device_path *file_path, void **buffer) { struct efi_file_info *info = NULL; struct efi_file_handle *f; static efi_status_t ret; uint64_t bs; f = efi_file_from_path(file_path); if (!f) return EFI_DEVICE_ERROR; bs = 0; EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, &bs, info)); if (ret == EFI_BUFFER_TOO_SMALL) { info = malloc(bs); EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, &bs, info)); } if (ret != EFI_SUCCESS) goto error; ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer); if (ret) goto error; EFI_CALL(ret = f->read(f, &info->file_size, *buffer)); error: free(info); EFI_CALL(f->close(f)); if (ret != EFI_SUCCESS) { efi_free_pool(*buffer); *buffer = NULL; } return ret; } /* * Load an EFI image into memory. * * This function implements the LoadImage service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @boot_policy true for request originating from the boot manager * @parent_image the caller's image handle * @file_path the path of the image to load * @source_buffer memory location from which the image is installed * @source_size size of the memory area from which the image is * installed * @image_handle handle for the newly installed image * @return status code */ static efi_status_t EFIAPI efi_load_image(bool boot_policy, efi_handle_t parent_image, struct efi_device_path *file_path, void *source_buffer, unsigned long source_size, efi_handle_t *image_handle) { struct efi_loaded_image *info; struct efi_object *obj; efi_status_t ret; EFI_ENTRY("%d, %p, %pD, %p, %ld, %p", boot_policy, parent_image, file_path, source_buffer, source_size, image_handle); if (!image_handle || !parent_image) { ret = EFI_INVALID_PARAMETER; goto error; } if (!source_buffer && !file_path) { ret = EFI_NOT_FOUND; goto error; } info = calloc(1, sizeof(*info)); if (!info) { ret = EFI_OUT_OF_RESOURCES; goto error; } obj = calloc(1, sizeof(*obj)); if (!obj) { free(info); ret = EFI_OUT_OF_RESOURCES; goto error; } if (!source_buffer) { struct efi_device_path *dp, *fp; ret = efi_load_image_from_path(file_path, &source_buffer); if (ret != EFI_SUCCESS) goto failure; /* * split file_path which contains both the device and * file parts: */ efi_dp_split_file_path(file_path, &dp, &fp); ret = efi_setup_loaded_image(info, obj, dp, fp); if (ret != EFI_SUCCESS) goto failure; } else { /* In this case, file_path is the "device" path, ie. * something like a HARDWARE_DEVICE:MEMORY_MAPPED */ ret = efi_setup_loaded_image(info, obj, file_path, NULL); if (ret != EFI_SUCCESS) goto failure; } info->reserved = efi_load_pe(source_buffer, info); if (!info->reserved) { ret = EFI_UNSUPPORTED; goto failure; } info->system_table = &systab; info->parent_handle = parent_image; *image_handle = obj->handle; return EFI_EXIT(EFI_SUCCESS); failure: free(info); efi_delete_handle(obj); error: return EFI_EXIT(ret); } /* * Call the entry point of an image. * * This function implements the StartImage service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @image_handle handle of the image * @exit_data_size size of the buffer * @exit_data buffer to receive the exit data of the called image * @return status code */ static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle, unsigned long *exit_data_size, s16 **exit_data) { EFIAPI efi_status_t (*entry)(efi_handle_t image_handle, struct efi_system_table *st); struct efi_loaded_image *info = image_handle; efi_status_t ret; EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data); entry = info->reserved; efi_is_direct_boot = false; /* call the image! */ if (setjmp(&info->exit_jmp)) { /* * We called the entry point of the child image with EFI_CALL * in the lines below. The child image called the Exit() boot * service efi_exit() which executed the long jump that brought * us to the current line. This implies that the second half * of the EFI_CALL macro has not been executed. */ #ifdef CONFIG_ARM /* * efi_exit() called efi_restore_gd(). We have to undo this * otherwise __efi_entry_check() will put the wrong value into * app_gd. */ gd = app_gd; #endif /* * To get ready to call EFI_EXIT below we have to execute the * missed out steps of EFI_CALL. */ assert(__efi_entry_check()); debug("%sEFI: %lu returned by started image\n", __efi_nesting_dec(), (unsigned long)((uintptr_t)info->exit_status & ~EFI_ERROR_MASK)); return EFI_EXIT(info->exit_status); } ret = EFI_CALL(entry(image_handle, &systab)); /* * Usually UEFI applications call Exit() instead of returning. * But because the world doesn not consist of ponies and unicorns, * we're happy to emulate that behavior on behalf of a payload * that forgot. */ return EFI_CALL(systab.boottime->exit(image_handle, ret, 0, NULL)); } /* * Leave an EFI application or driver. * * This function implements the Exit service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @image_handle handle of the application or driver that is exiting * @exit_status status code * @exit_data_size size of the buffer in bytes * @exit_data buffer with data describing an error * @return status code */ static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle, efi_status_t exit_status, unsigned long exit_data_size, int16_t *exit_data) { /* * We require that the handle points to the original loaded * image protocol interface. * * For getting the longjmp address this is safer than locating * the protocol because the protocol may have been reinstalled * pointing to another memory location. * * TODO: We should call the unload procedure of the loaded * image protocol. */ struct efi_loaded_image *loaded_image_info = (void *)image_handle; EFI_ENTRY("%p, %ld, %ld, %p", image_handle, exit_status, exit_data_size, exit_data); /* Make sure entry/exit counts for EFI world cross-overs match */ EFI_EXIT(exit_status); /* * But longjmp out with the U-Boot gd, not the application's, as * the other end is a setjmp call inside EFI context. */ efi_restore_gd(); loaded_image_info->exit_status = exit_status; longjmp(&loaded_image_info->exit_jmp, 1); panic("EFI application exited"); } /* * Unload an EFI image. * * This function implements the UnloadImage service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @image_handle handle of the image to be unloaded * @return status code */ static efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle) { struct efi_object *efiobj; EFI_ENTRY("%p", image_handle); efiobj = efi_search_obj(image_handle); if (efiobj) list_del(&efiobj->link); return EFI_EXIT(EFI_SUCCESS); } /* * Fix up caches for EFI payloads if necessary. */ static void efi_exit_caches(void) { #if defined(CONFIG_ARM) && !defined(CONFIG_ARM64) /* * Grub on 32bit ARM needs to have caches disabled before jumping into * a zImage, but does not know of all cache layers. Give it a hand. */ if (efi_is_direct_boot) cleanup_before_linux(); #endif } /* * Stop all boot services. * * This function implements the ExitBootServices service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * All timer events are disabled. * For exit boot services events the notification function is called. * The boot services are disabled in the system table. * * @image_handle handle of the loaded image * @map_key key of the memory map * @return status code */ static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle, unsigned long map_key) { struct efi_event *evt; EFI_ENTRY("%p, %ld", image_handle, map_key); /* Make sure that notification functions are not called anymore */ efi_tpl = TPL_HIGH_LEVEL; /* Check if ExitBootServices has already been called */ if (!systab.boottime) return EFI_EXIT(EFI_SUCCESS); /* Add related events to the event group */ list_for_each_entry(evt, &efi_events, link) { if (evt->type == EVT_SIGNAL_EXIT_BOOT_SERVICES) evt->group = &efi_guid_event_group_exit_boot_services; } /* Notify that ExitBootServices is invoked. */ list_for_each_entry(evt, &efi_events, link) { if (evt->group && !guidcmp(evt->group, &efi_guid_event_group_exit_boot_services)) { efi_signal_event(evt, false); break; } } /* TODO Should persist EFI variables here */ board_quiesce_devices(); /* Fix up caches for EFI payloads if necessary */ efi_exit_caches(); /* This stops all lingering devices */ bootm_disable_interrupts(); /* Disable boottime services */ systab.con_in_handle = NULL; systab.con_in = NULL; systab.con_out_handle = NULL; systab.con_out = NULL; systab.stderr_handle = NULL; systab.std_err = NULL; systab.boottime = NULL; /* Recalculate CRC32 */ systab.hdr.crc32 = 0; systab.hdr.crc32 = crc32(0, (const unsigned char *)&systab, sizeof(struct efi_system_table)); /* Give the payload some time to boot */ efi_set_watchdog(0); WATCHDOG_RESET(); return EFI_EXIT(EFI_SUCCESS); } /* * Get next value of the counter. * * This function implements the NextMonotonicCount service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @count returned value of the counter * @return status code */ static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count) { static uint64_t mono; EFI_ENTRY("%p", count); *count = mono++; return EFI_EXIT(EFI_SUCCESS); } /* * Sleep. * * This function implements the Stall sercive. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @microseconds period to sleep in microseconds * @return status code */ static efi_status_t EFIAPI efi_stall(unsigned long microseconds) { EFI_ENTRY("%ld", microseconds); udelay(microseconds); return EFI_EXIT(EFI_SUCCESS); } /* * Reset the watchdog timer. * * This function implements the SetWatchdogTimer service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @timeout seconds before reset by watchdog * @watchdog_code code to be logged when resetting * @data_size size of buffer in bytes * @watchdog_data buffer with data describing the reset reason * @return status code */ static efi_status_t EFIAPI efi_set_watchdog_timer(unsigned long timeout, uint64_t watchdog_code, unsigned long data_size, uint16_t *watchdog_data) { EFI_ENTRY("%ld, 0x%" PRIx64 ", %ld, %p", timeout, watchdog_code, data_size, watchdog_data); return EFI_EXIT(efi_set_watchdog(timeout)); } /* * Close a protocol. * * This function implements the CloseProtocol service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle on which the protocol shall be closed * @protocol GUID of the protocol to close * @agent_handle handle of the driver * @controller_handle handle of the controller * @return status code */ static efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle, const efi_guid_t *protocol, efi_handle_t agent_handle, efi_handle_t controller_handle) { struct efi_handler *handler; struct efi_open_protocol_info_item *item; struct efi_open_protocol_info_item *pos; efi_status_t r; EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, agent_handle, controller_handle); if (!agent_handle) { r = EFI_INVALID_PARAMETER; goto out; } r = efi_search_protocol(handle, protocol, &handler); if (r != EFI_SUCCESS) goto out; r = EFI_NOT_FOUND; list_for_each_entry_safe(item, pos, &handler->open_infos, link) { if (item->info.agent_handle == agent_handle && item->info.controller_handle == controller_handle) { efi_delete_open_info(item); r = EFI_SUCCESS; break; } } out: return EFI_EXIT(r); } /* * Provide information about then open status of a protocol on a handle * * This function implements the OpenProtocolInformation service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle for which the information shall be retrieved * @protocol GUID of the protocol * @entry_buffer buffer to receive the open protocol information * @entry_count number of entries available in the buffer * @return status code */ static efi_status_t EFIAPI efi_open_protocol_information( efi_handle_t handle, const efi_guid_t *protocol, struct efi_open_protocol_info_entry **entry_buffer, efi_uintn_t *entry_count) { unsigned long buffer_size; unsigned long count; struct efi_handler *handler; struct efi_open_protocol_info_item *item; efi_status_t r; EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, entry_buffer, entry_count); /* Check parameters */ if (!entry_buffer) { r = EFI_INVALID_PARAMETER; goto out; } r = efi_search_protocol(handle, protocol, &handler); if (r != EFI_SUCCESS) goto out; /* Count entries */ count = 0; list_for_each_entry(item, &handler->open_infos, link) { if (item->info.open_count) ++count; } *entry_count = count; *entry_buffer = NULL; if (!count) { r = EFI_SUCCESS; goto out; } /* Copy entries */ buffer_size = count * sizeof(struct efi_open_protocol_info_entry); r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, (void **)entry_buffer); if (r != EFI_SUCCESS) goto out; list_for_each_entry_reverse(item, &handler->open_infos, link) { if (item->info.open_count) (*entry_buffer)[--count] = item->info; } out: return EFI_EXIT(r); } /* * Get protocols installed on a handle. * * This function implements the ProtocolsPerHandleService. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle for which the information is retrieved * @protocol_buffer buffer with protocol GUIDs * @protocol_buffer_count number of entries in the buffer * @return status code */ static efi_status_t EFIAPI efi_protocols_per_handle( efi_handle_t handle, efi_guid_t ***protocol_buffer, efi_uintn_t *protocol_buffer_count) { unsigned long buffer_size; struct efi_object *efiobj; struct list_head *protocol_handle; efi_status_t r; EFI_ENTRY("%p, %p, %p", handle, protocol_buffer, protocol_buffer_count); if (!handle || !protocol_buffer || !protocol_buffer_count) return EFI_EXIT(EFI_INVALID_PARAMETER); *protocol_buffer = NULL; *protocol_buffer_count = 0; efiobj = efi_search_obj(handle); if (!efiobj) return EFI_EXIT(EFI_INVALID_PARAMETER); /* Count protocols */ list_for_each(protocol_handle, &efiobj->protocols) { ++*protocol_buffer_count; } /* Copy guids */ if (*protocol_buffer_count) { size_t j = 0; buffer_size = sizeof(efi_guid_t *) * *protocol_buffer_count; r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, (void **)protocol_buffer); if (r != EFI_SUCCESS) return EFI_EXIT(r); list_for_each(protocol_handle, &efiobj->protocols) { struct efi_handler *protocol; protocol = list_entry(protocol_handle, struct efi_handler, link); (*protocol_buffer)[j] = (void *)protocol->guid; ++j; } } return EFI_EXIT(EFI_SUCCESS); } /* * Locate handles implementing a protocol. * * This function implements the LocateHandleBuffer service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @search_type selection criterion * @protocol GUID of the protocol * @search_key registration key * @no_handles number of returned handles * @buffer buffer with the returned handles * @return status code */ static efi_status_t EFIAPI efi_locate_handle_buffer( enum efi_locate_search_type search_type, const efi_guid_t *protocol, void *search_key, efi_uintn_t *no_handles, efi_handle_t **buffer) { efi_status_t r; efi_uintn_t buffer_size = 0; EFI_ENTRY("%d, %pUl, %p, %p, %p", search_type, protocol, search_key, no_handles, buffer); if (!no_handles || !buffer) { r = EFI_INVALID_PARAMETER; goto out; } *no_handles = 0; *buffer = NULL; r = efi_locate_handle(search_type, protocol, search_key, &buffer_size, *buffer); if (r != EFI_BUFFER_TOO_SMALL) goto out; r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES, buffer_size, (void **)buffer); if (r != EFI_SUCCESS) goto out; r = efi_locate_handle(search_type, protocol, search_key, &buffer_size, *buffer); if (r == EFI_SUCCESS) *no_handles = buffer_size / sizeof(efi_handle_t); out: return EFI_EXIT(r); } /* * Find an interface implementing a protocol. * * This function implements the LocateProtocol service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @protocol GUID of the protocol * @registration registration key passed to the notification function * @protocol_interface interface implementing the protocol * @return status code */ static efi_status_t EFIAPI efi_locate_protocol(const efi_guid_t *protocol, void *registration, void **protocol_interface) { struct list_head *lhandle; efi_status_t ret; EFI_ENTRY("%pUl, %p, %p", protocol, registration, protocol_interface); if (!protocol || !protocol_interface) return EFI_EXIT(EFI_INVALID_PARAMETER); list_for_each(lhandle, &efi_obj_list) { struct efi_object *efiobj; struct efi_handler *handler; efiobj = list_entry(lhandle, struct efi_object, link); ret = efi_search_protocol(efiobj->handle, protocol, &handler); if (ret == EFI_SUCCESS) { *protocol_interface = handler->protocol_interface; return EFI_EXIT(EFI_SUCCESS); } } *protocol_interface = NULL; return EFI_EXIT(EFI_NOT_FOUND); } /* * Get the device path and handle of an device implementing a protocol. * * This function implements the LocateDevicePath service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @protocol GUID of the protocol * @device_path device path * @device handle of the device * @return status code */ static efi_status_t EFIAPI efi_locate_device_path( const efi_guid_t *protocol, struct efi_device_path **device_path, efi_handle_t *device) { struct efi_device_path *dp; size_t i; struct efi_handler *handler; efi_handle_t *handles; size_t len, len_dp; size_t len_best = 0; efi_uintn_t no_handles; u8 *remainder; efi_status_t ret; EFI_ENTRY("%pUl, %p, %p", protocol, device_path, device); if (!protocol || !device_path || !*device_path || !device) { ret = EFI_INVALID_PARAMETER; goto out; } /* Find end of device path */ len = efi_dp_size(*device_path); /* Get all handles implementing the protocol */ ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL, &no_handles, &handles)); if (ret != EFI_SUCCESS) goto out; for (i = 0; i < no_handles; ++i) { /* Find the device path protocol */ ret = efi_search_protocol(handles[i], &efi_guid_device_path, &handler); if (ret != EFI_SUCCESS) continue; dp = (struct efi_device_path *)handler->protocol_interface; len_dp = efi_dp_size(dp); /* * This handle can only be a better fit * if its device path length is longer than the best fit and * if its device path length is shorter of equal the searched * device path. */ if (len_dp <= len_best || len_dp > len) continue; /* Check if dp is a subpath of device_path */ if (memcmp(*device_path, dp, len_dp)) continue; *device = handles[i]; len_best = len_dp; } if (len_best) { remainder = (u8 *)*device_path + len_best; *device_path = (struct efi_device_path *)remainder; ret = EFI_SUCCESS; } else { ret = EFI_NOT_FOUND; } out: return EFI_EXIT(ret); } /* * Install multiple protocol interfaces. * * This function implements the MultipleProtocolInterfaces service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle on which the protocol interfaces shall be installed * @... NULL terminated argument list with pairs of protocol GUIDS and * interfaces * @return status code */ static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces( void **handle, ...) { EFI_ENTRY("%p", handle); va_list argptr; const efi_guid_t *protocol; void *protocol_interface; efi_status_t r = EFI_SUCCESS; int i = 0; if (!handle) return EFI_EXIT(EFI_INVALID_PARAMETER); va_start(argptr, handle); for (;;) { protocol = va_arg(argptr, efi_guid_t*); if (!protocol) break; protocol_interface = va_arg(argptr, void*); r = EFI_CALL(efi_install_protocol_interface( handle, protocol, EFI_NATIVE_INTERFACE, protocol_interface)); if (r != EFI_SUCCESS) break; i++; } va_end(argptr); if (r == EFI_SUCCESS) return EFI_EXIT(r); /* If an error occurred undo all changes. */ va_start(argptr, handle); for (; i; --i) { protocol = va_arg(argptr, efi_guid_t*); protocol_interface = va_arg(argptr, void*); EFI_CALL(efi_uninstall_protocol_interface(handle, protocol, protocol_interface)); } va_end(argptr); return EFI_EXIT(r); } /* * Uninstall multiple protocol interfaces. * * This function implements the UninstallMultipleProtocolInterfaces service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle from which the protocol interfaces shall be removed * @... NULL terminated argument list with pairs of protocol GUIDS and * interfaces * @return status code */ static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces( void *handle, ...) { EFI_ENTRY("%p", handle); va_list argptr; const efi_guid_t *protocol; void *protocol_interface; efi_status_t r = EFI_SUCCESS; size_t i = 0; if (!handle) return EFI_EXIT(EFI_INVALID_PARAMETER); va_start(argptr, handle); for (;;) { protocol = va_arg(argptr, efi_guid_t*); if (!protocol) break; protocol_interface = va_arg(argptr, void*); r = EFI_CALL(efi_uninstall_protocol_interface( handle, protocol, protocol_interface)); if (r != EFI_SUCCESS) break; i++; } va_end(argptr); if (r == EFI_SUCCESS) return EFI_EXIT(r); /* If an error occurred undo all changes. */ va_start(argptr, handle); for (; i; --i) { protocol = va_arg(argptr, efi_guid_t*); protocol_interface = va_arg(argptr, void*); EFI_CALL(efi_install_protocol_interface(&handle, protocol, EFI_NATIVE_INTERFACE, protocol_interface)); } va_end(argptr); return EFI_EXIT(r); } /* * Calculate cyclic redundancy code. * * This function implements the CalculateCrc32 service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @data buffer with data * @data_size size of buffer in bytes * @crc32_p cyclic redundancy code * @return status code */ static efi_status_t EFIAPI efi_calculate_crc32(void *data, unsigned long data_size, uint32_t *crc32_p) { EFI_ENTRY("%p, %ld", data, data_size); *crc32_p = crc32(0, data, data_size); return EFI_EXIT(EFI_SUCCESS); } /* * Copy memory. * * This function implements the CopyMem service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @destination destination of the copy operation * @source source of the copy operation * @length number of bytes to copy */ static void EFIAPI efi_copy_mem(void *destination, const void *source, size_t length) { EFI_ENTRY("%p, %p, %ld", destination, source, (unsigned long)length); memcpy(destination, source, length); EFI_EXIT(EFI_SUCCESS); } /* * Fill memory with a byte value. * * This function implements the SetMem service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @buffer buffer to fill * @size size of buffer in bytes * @value byte to copy to the buffer */ static void EFIAPI efi_set_mem(void *buffer, size_t size, uint8_t value) { EFI_ENTRY("%p, %ld, 0x%x", buffer, (unsigned long)size, value); memset(buffer, value, size); EFI_EXIT(EFI_SUCCESS); } /* * Open protocol interface on a handle. * * @handler handler of a protocol * @protocol_interface interface implementing the protocol * @agent_handle handle of the driver * @controller_handle handle of the controller * @attributes attributes indicating how to open the protocol * @return status code */ static efi_status_t efi_protocol_open( struct efi_handler *handler, void **protocol_interface, void *agent_handle, void *controller_handle, uint32_t attributes) { struct efi_open_protocol_info_item *item; struct efi_open_protocol_info_entry *match = NULL; bool opened_by_driver = false; bool opened_exclusive = false; /* If there is no agent, only return the interface */ if (!agent_handle) goto out; /* For TEST_PROTOCOL ignore interface attribute */ if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) *protocol_interface = NULL; /* * Check if the protocol is already opened by a driver with the same * attributes or opened exclusively */ list_for_each_entry(item, &handler->open_infos, link) { if (item->info.agent_handle == agent_handle) { if ((attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) && (item->info.attributes == attributes)) return EFI_ALREADY_STARTED; } if (item->info.attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) opened_exclusive = true; } /* Only one controller can open the protocol exclusively */ if (opened_exclusive && attributes & (EFI_OPEN_PROTOCOL_EXCLUSIVE | EFI_OPEN_PROTOCOL_BY_DRIVER)) return EFI_ACCESS_DENIED; /* Prepare exclusive opening */ if (attributes & EFI_OPEN_PROTOCOL_EXCLUSIVE) { /* Try to disconnect controllers */ list_for_each_entry(item, &handler->open_infos, link) { if (item->info.attributes == EFI_OPEN_PROTOCOL_BY_DRIVER) EFI_CALL(efi_disconnect_controller( item->info.controller_handle, item->info.agent_handle, NULL)); } opened_by_driver = false; /* Check if all controllers are disconnected */ list_for_each_entry(item, &handler->open_infos, link) { if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER) opened_by_driver = true; } /* Only one controller can be conncected */ if (opened_by_driver) return EFI_ACCESS_DENIED; } /* Find existing entry */ list_for_each_entry(item, &handler->open_infos, link) { if (item->info.agent_handle == agent_handle && item->info.controller_handle == controller_handle) match = &item->info; } /* None found, create one */ if (!match) { match = efi_create_open_info(handler); if (!match) return EFI_OUT_OF_RESOURCES; } match->agent_handle = agent_handle; match->controller_handle = controller_handle; match->attributes = attributes; match->open_count++; out: /* For TEST_PROTOCOL ignore interface attribute. */ if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL) *protocol_interface = handler->protocol_interface; return EFI_SUCCESS; } /* * Open protocol interface on a handle. * * This function implements the OpenProtocol interface. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle on which the protocol shall be opened * @protocol GUID of the protocol * @protocol_interface interface implementing the protocol * @agent_handle handle of the driver * @controller_handle handle of the controller * @attributes attributes indicating how to open the protocol * @return status code */ static efi_status_t EFIAPI efi_open_protocol( void *handle, const efi_guid_t *protocol, void **protocol_interface, void *agent_handle, void *controller_handle, uint32_t attributes) { struct efi_handler *handler; efi_status_t r = EFI_INVALID_PARAMETER; EFI_ENTRY("%p, %pUl, %p, %p, %p, 0x%x", handle, protocol, protocol_interface, agent_handle, controller_handle, attributes); if (!handle || !protocol || (!protocol_interface && attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL)) { goto out; } switch (attributes) { case EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL: case EFI_OPEN_PROTOCOL_GET_PROTOCOL: case EFI_OPEN_PROTOCOL_TEST_PROTOCOL: break; case EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER: if (controller_handle == handle) goto out; /* fall-through */ case EFI_OPEN_PROTOCOL_BY_DRIVER: case EFI_OPEN_PROTOCOL_BY_DRIVER | EFI_OPEN_PROTOCOL_EXCLUSIVE: /* Check that the controller handle is valid */ if (!efi_search_obj(controller_handle)) goto out; /* fall-through */ case EFI_OPEN_PROTOCOL_EXCLUSIVE: /* Check that the agent handle is valid */ if (!efi_search_obj(agent_handle)) goto out; break; default: goto out; } r = efi_search_protocol(handle, protocol, &handler); if (r != EFI_SUCCESS) goto out; r = efi_protocol_open(handler, protocol_interface, agent_handle, controller_handle, attributes); out: return EFI_EXIT(r); } /* * Get interface of a protocol on a handle. * * This function implements the HandleProtocol service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @handle handle on which the protocol shall be opened * @protocol GUID of the protocol * @protocol_interface interface implementing the protocol * @return status code */ static efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle, const efi_guid_t *protocol, void **protocol_interface) { return efi_open_protocol(handle, protocol, protocol_interface, NULL, NULL, EFI_OPEN_PROTOCOL_BY_HANDLE_PROTOCOL); } static efi_status_t efi_bind_controller( efi_handle_t controller_handle, efi_handle_t driver_image_handle, struct efi_device_path *remain_device_path) { struct efi_driver_binding_protocol *binding_protocol; efi_status_t r; r = EFI_CALL(efi_open_protocol(driver_image_handle, &efi_guid_driver_binding_protocol, (void **)&binding_protocol, driver_image_handle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL)); if (r != EFI_SUCCESS) return r; r = EFI_CALL(binding_protocol->supported(binding_protocol, controller_handle, remain_device_path)); if (r == EFI_SUCCESS) r = EFI_CALL(binding_protocol->start(binding_protocol, controller_handle, remain_device_path)); EFI_CALL(efi_close_protocol(driver_image_handle, &efi_guid_driver_binding_protocol, driver_image_handle, NULL)); return r; } static efi_status_t efi_connect_single_controller( efi_handle_t controller_handle, efi_handle_t *driver_image_handle, struct efi_device_path *remain_device_path) { efi_handle_t *buffer; size_t count; size_t i; efi_status_t r; size_t connected = 0; /* Get buffer with all handles with driver binding protocol */ r = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, &efi_guid_driver_binding_protocol, NULL, &count, &buffer)); if (r != EFI_SUCCESS) return r; /* Context Override */ if (driver_image_handle) { for (; *driver_image_handle; ++driver_image_handle) { for (i = 0; i < count; ++i) { if (buffer[i] == *driver_image_handle) { buffer[i] = NULL; r = efi_bind_controller( controller_handle, *driver_image_handle, remain_device_path); /* * For drivers that do not support the * controller or are already connected * we receive an error code here. */ if (r == EFI_SUCCESS) ++connected; } } } } /* * TODO: Some overrides are not yet implemented: * - Platform Driver Override * - Driver Family Override Search * - Bus Specific Driver Override */ /* Driver Binding Search */ for (i = 0; i < count; ++i) { if (buffer[i]) { r = efi_bind_controller(controller_handle, buffer[i], remain_device_path); if (r == EFI_SUCCESS) ++connected; } } efi_free_pool(buffer); if (!connected) return EFI_NOT_FOUND; return EFI_SUCCESS; } /* * Connect a controller to a driver. * * This function implements the ConnectController service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * First all driver binding protocol handles are tried for binding drivers. * Afterwards all handles that have openened a protocol of the controller * with EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER are connected to drivers. * * @controller_handle handle of the controller * @driver_image_handle handle of the driver * @remain_device_path device path of a child controller * @recursive true to connect all child controllers * @return status code */ static efi_status_t EFIAPI efi_connect_controller( efi_handle_t controller_handle, efi_handle_t *driver_image_handle, struct efi_device_path *remain_device_path, bool recursive) { efi_status_t r; efi_status_t ret = EFI_NOT_FOUND; struct efi_object *efiobj; EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle, remain_device_path, recursive); efiobj = efi_search_obj(controller_handle); if (!efiobj) { ret = EFI_INVALID_PARAMETER; goto out; } r = efi_connect_single_controller(controller_handle, driver_image_handle, remain_device_path); if (r == EFI_SUCCESS) ret = EFI_SUCCESS; if (recursive) { struct efi_handler *handler; struct efi_open_protocol_info_item *item; list_for_each_entry(handler, &efiobj->protocols, link) { list_for_each_entry(item, &handler->open_infos, link) { if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) { r = EFI_CALL(efi_connect_controller( item->info.controller_handle, driver_image_handle, remain_device_path, recursive)); if (r == EFI_SUCCESS) ret = EFI_SUCCESS; } } } } /* Check for child controller specified by end node */ if (ret != EFI_SUCCESS && remain_device_path && remain_device_path->type == DEVICE_PATH_TYPE_END) ret = EFI_SUCCESS; out: return EFI_EXIT(ret); } /* * Get all child controllers associated to a driver. * The allocated buffer has to be freed with free(). * * @efiobj handle of the controller * @driver_handle handle of the driver * @number_of_children number of child controllers * @child_handle_buffer handles of the the child controllers */ static efi_status_t efi_get_child_controllers( struct efi_object *efiobj, efi_handle_t driver_handle, efi_uintn_t *number_of_children, efi_handle_t **child_handle_buffer) { struct efi_handler *handler; struct efi_open_protocol_info_item *item; efi_uintn_t count = 0, i; bool duplicate; /* Count all child controller associations */ list_for_each_entry(handler, &efiobj->protocols, link) { list_for_each_entry(item, &handler->open_infos, link) { if (item->info.agent_handle == driver_handle && item->info.attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) ++count; } } /* * Create buffer. In case of duplicate child controller assignments * the buffer will be too large. But that does not harm. */ *number_of_children = 0; *child_handle_buffer = calloc(count, sizeof(efi_handle_t)); if (!*child_handle_buffer) return EFI_OUT_OF_RESOURCES; /* Copy unique child handles */ list_for_each_entry(handler, &efiobj->protocols, link) { list_for_each_entry(item, &handler->open_infos, link) { if (item->info.agent_handle == driver_handle && item->info.attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) { /* Check this is a new child controller */ duplicate = false; for (i = 0; i < *number_of_children; ++i) { if ((*child_handle_buffer)[i] == item->info.controller_handle) duplicate = true; } /* Copy handle to buffer */ if (!duplicate) { i = (*number_of_children)++; (*child_handle_buffer)[i] = item->info.controller_handle; } } } } return EFI_SUCCESS; } /* * Disconnect a controller from a driver. * * This function implements the DisconnectController service. * See the Unified Extensible Firmware Interface (UEFI) specification * for details. * * @controller_handle handle of the controller * @driver_image_handle handle of the driver * @child_handle handle of the child to destroy * @return status code */ static efi_status_t EFIAPI efi_disconnect_controller( efi_handle_t controller_handle, efi_handle_t driver_image_handle, efi_handle_t child_handle) { struct efi_driver_binding_protocol *binding_protocol; efi_handle_t *child_handle_buffer = NULL; size_t number_of_children = 0; efi_status_t r; size_t stop_count = 0; struct efi_object *efiobj; EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle, child_handle); efiobj = efi_search_obj(controller_handle); if (!efiobj) { r = EFI_INVALID_PARAMETER; goto out; } if (child_handle && !efi_search_obj(child_handle)) { r = EFI_INVALID_PARAMETER; goto out; } /* If no driver handle is supplied, disconnect all drivers */ if (!driver_image_handle) { r = efi_disconnect_all_drivers(efiobj, NULL, child_handle); goto out; } /* Create list of child handles */ if (child_handle) { number_of_children = 1; child_handle_buffer = &child_handle; } else { efi_get_child_controllers(efiobj, driver_image_handle, &number_of_children, &child_handle_buffer); } /* Get the driver binding protocol */ r = EFI_CALL(efi_open_protocol(driver_image_handle, &efi_guid_driver_binding_protocol, (void **)&binding_protocol, driver_image_handle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL)); if (r != EFI_SUCCESS) goto out; /* Remove the children */ if (number_of_children) { r = EFI_CALL(binding_protocol->stop(binding_protocol, controller_handle, number_of_children, child_handle_buffer)); if (r == EFI_SUCCESS) ++stop_count; } /* Remove the driver */ if (!child_handle) r = EFI_CALL(binding_protocol->stop(binding_protocol, controller_handle, 0, NULL)); if (r == EFI_SUCCESS) ++stop_count; EFI_CALL(efi_close_protocol(driver_image_handle, &efi_guid_driver_binding_protocol, driver_image_handle, NULL)); if (stop_count) r = EFI_SUCCESS; else r = EFI_NOT_FOUND; out: if (!child_handle) free(child_handle_buffer); return EFI_EXIT(r); } static const struct efi_boot_services efi_boot_services = { .hdr = { .headersize = sizeof(struct efi_table_hdr), }, .raise_tpl = efi_raise_tpl, .restore_tpl = efi_restore_tpl, .allocate_pages = efi_allocate_pages_ext, .free_pages = efi_free_pages_ext, .get_memory_map = efi_get_memory_map_ext, .allocate_pool = efi_allocate_pool_ext, .free_pool = efi_free_pool_ext, .create_event = efi_create_event_ext, .set_timer = efi_set_timer_ext, .wait_for_event = efi_wait_for_event, .signal_event = efi_signal_event_ext, .close_event = efi_close_event, .check_event = efi_check_event, .install_protocol_interface = efi_install_protocol_interface, .reinstall_protocol_interface = efi_reinstall_protocol_interface, .uninstall_protocol_interface = efi_uninstall_protocol_interface, .handle_protocol = efi_handle_protocol, .reserved = NULL, .register_protocol_notify = efi_register_protocol_notify, .locate_handle = efi_locate_handle_ext, .locate_device_path = efi_locate_device_path, .install_configuration_table = efi_install_configuration_table_ext, .load_image = efi_load_image, .start_image = efi_start_image, .exit = efi_exit, .unload_image = efi_unload_image, .exit_boot_services = efi_exit_boot_services, .get_next_monotonic_count = efi_get_next_monotonic_count, .stall = efi_stall, .set_watchdog_timer = efi_set_watchdog_timer, .connect_controller = efi_connect_controller, .disconnect_controller = efi_disconnect_controller, .open_protocol = efi_open_protocol, .close_protocol = efi_close_protocol, .open_protocol_information = efi_open_protocol_information, .protocols_per_handle = efi_protocols_per_handle, .locate_handle_buffer = efi_locate_handle_buffer, .locate_protocol = efi_locate_protocol, .install_multiple_protocol_interfaces = efi_install_multiple_protocol_interfaces, .uninstall_multiple_protocol_interfaces = efi_uninstall_multiple_protocol_interfaces, .calculate_crc32 = efi_calculate_crc32, .copy_mem = efi_copy_mem, .set_mem = efi_set_mem, .create_event_ex = efi_create_event_ex, }; static uint16_t __efi_runtime_data firmware_vendor[] = L"Das U-Boot"; struct efi_system_table __efi_runtime_data systab = { .hdr = { .signature = EFI_SYSTEM_TABLE_SIGNATURE, .revision = 2 << 16 | 70, /* 2.7 */ .headersize = sizeof(struct efi_table_hdr), }, .fw_vendor = (long)firmware_vendor, .con_in = (void *)&efi_con_in, .con_out = (void *)&efi_con_out, .std_err = (void *)&efi_con_out, .runtime = (void *)&efi_runtime_services, .boottime = (void *)&efi_boot_services, .nr_tables = 0, .tables = (void *)efi_conf_table, };