/* List of all events */
LIST_HEAD(efi_events);
+/* Handle of the currently executing image */
+static efi_handle_t current_image;
+
+/*
+ * 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;
+
#ifdef CONFIG_ARM
/*
* The "gd" pointer lives in a register on ARM and AArch64 that we declare
static volatile void *efi_gd, *app_gd;
#endif
-static int entry_count;
+/* 1 if inside U-Boot code, 0 if inside EFI payload code */
+static int entry_count = 1;
static int nesting_level;
/* GUID of the device tree table */
const efi_guid_t efi_guid_fdt = EFI_FDT_GUID;
}
/**
- * efi_add_handle() - add a new object to the object list
- * @obj: object to be added
+ * efi_add_handle() - add a new handle to the object list
+ *
+ * @handle: handle to be added
*
- * The protocols list is initialized. The object handle is set.
+ * The protocols list is initialized. The handle is added to the list of known
+ * UEFI objects.
*/
-void efi_add_handle(struct efi_object *obj)
+void efi_add_handle(efi_handle_t handle)
{
- if (!obj)
+ if (!handle)
return;
- INIT_LIST_HEAD(&obj->protocols);
- obj->handle = obj;
- list_add_tail(&obj->link, &efi_obj_list);
+ INIT_LIST_HEAD(&handle->protocols);
+ list_add_tail(&handle->link, &efi_obj_list);
}
/**
return EFI_OUT_OF_RESOURCES;
efi_add_handle(obj);
- *handle = obj->handle;
+ *handle = obj;
return EFI_SUCCESS;
}
*
* @obj: handle to delete
*/
-void efi_delete_handle(struct efi_object *obj)
+void efi_delete_handle(efi_handle_t handle)
{
- if (!obj)
+ if (!handle)
return;
- efi_remove_all_protocols(obj->handle);
- list_del(&obj->link);
- free(obj);
+ efi_remove_all_protocols(handle);
+ list_del(&handle->link);
+ free(handle);
}
/**
}
if ((type & (EVT_NOTIFY_WAIT | EVT_NOTIFY_SIGNAL)) &&
- (is_valid_tpl(notify_tpl) != EFI_SUCCESS))
+ (!notify_function || is_valid_tpl(notify_tpl) != EFI_SUCCESS))
return EFI_INVALID_PARAMETER;
evt = calloc(1, sizeof(struct efi_event));
struct efi_object *efiobj;
list_for_each_entry(efiobj, &efi_obj_list, link) {
- if (efiobj->handle == handle)
+ if (efiobj == handle)
return efiobj;
}
* Return: status code
*/
static efi_status_t EFIAPI efi_install_protocol_interface(
- void **handle, const efi_guid_t *protocol,
+ efi_handle_t *handle, const efi_guid_t *protocol,
int protocol_interface_type, void *protocol_interface)
{
efi_status_t r;
/**
* efi_get_drivers() - get all drivers associated to a controller
- * @efiobj: handle of the controller
+ * @handle: 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,
+static efi_status_t efi_get_drivers(efi_handle_t handle,
const efi_guid_t *protocol,
efi_uintn_t *number_of_drivers,
efi_handle_t **driver_handle_buffer)
bool duplicate;
/* Count all driver associations */
- list_for_each_entry(handler, &efiobj->protocols, link) {
+ list_for_each_entry(handler, &handle->protocols, link) {
if (protocol && guidcmp(handler->guid, protocol))
continue;
list_for_each_entry(item, &handler->open_infos, link) {
if (!*driver_handle_buffer)
return EFI_OUT_OF_RESOURCES;
/* Collect unique driver handles */
- list_for_each_entry(handler, &efiobj->protocols, link) {
+ list_for_each_entry(handler, &handle->protocols, link) {
if (protocol && guidcmp(handler->guid, protocol))
continue;
list_for_each_entry(item, &handler->open_infos, link) {
/**
* efi_disconnect_all_drivers() - disconnect all drivers from a controller
- * @efiobj: handle of the controller
+ * @handle: 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)
+static efi_status_t efi_disconnect_all_drivers
+ (efi_handle_t handle,
+ 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,
+ ret = efi_get_drivers(handle, 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,
+ handle,
driver_handle_buffer[--number_of_drivers],
child_handle));
if (r == EFI_SUCCESS)
}
/**
- * efi_uninstall_protocol_interface() - uninstall protocol interface
+ * efi_uninstall_protocol() - uninstall protocol interface
+ *
* @handle: handle from which the protocol shall be removed
* @protocol: GUID of the protocol to be removed
* @protocol_interface: interface to be removed
*
- * This function implements the UninstallProtocolInterface service.
- *
- * See the Unified Extensible Firmware Interface (UEFI) specification for
- * details.
+ * This function DOES NOT delete a handle without installed protocol.
*
* Return: status code
*/
-static efi_status_t EFIAPI efi_uninstall_protocol_interface(
- efi_handle_t handle, const efi_guid_t *protocol,
- void *protocol_interface)
+static efi_status_t efi_uninstall_protocol
+ (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 *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_remove_protocol(handle, protocol, protocol_interface);
out:
- return EFI_EXIT(r);
+ return r;
+}
+
+/**
+ * efi_uninstall_protocol_interface() - uninstall protocol interface
+ * @handle: handle from which the protocol shall be removed
+ * @protocol: GUID of the protocol to be removed
+ * @protocol_interface: interface to be removed
+ *
+ * This function implements the UninstallProtocolInterface service.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * Return: status code
+ */
+static efi_status_t EFIAPI efi_uninstall_protocol_interface
+ (efi_handle_t handle, const efi_guid_t *protocol,
+ void *protocol_interface)
+{
+ efi_status_t ret;
+
+ EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface);
+
+ ret = efi_uninstall_protocol(handle, protocol, protocol_interface);
+ if (ret != EFI_SUCCESS)
+ goto out;
+
+ /* If the last protocol has been removed, delete the handle. */
+ if (list_empty(&handle->protocols)) {
+ list_del(&handle->link);
+ free(handle);
+ }
+out:
+ return EFI_EXIT(ret);
}
/**
* @search_type: selection criterion
* @protocol: GUID of the protocol
* @search_key: registration key
- * @efiobj: handle
+ * @handle: handle
*
* See the documentation of the LocateHandle service in the UEFI specification.
*
*/
static int efi_search(enum efi_locate_search_type search_type,
const efi_guid_t *protocol, void *search_key,
- struct efi_object *efiobj)
+ efi_handle_t handle)
{
efi_status_t ret;
/* TODO: RegisterProtocolNotify is not implemented yet */
return -1;
case BY_PROTOCOL:
- ret = efi_search_protocol(efiobj->handle, protocol, NULL);
+ ret = efi_search_protocol(handle, protocol, NULL);
return (ret != EFI_SUCCESS);
default:
/* Invalid search type */
/* 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;
+ *buffer++ = efiobj;
}
return EFI_SUCCESS;
/**
* efi_setup_loaded_image() - initialize a loaded image
- * @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
*
* Initialize a loaded_image_info and loaded_image_info object with correct
* protocols, boot-device, etc.
*
- * Return: status code
+ * In case of an error *handle_ptr and *info_ptr are set to NULL and an error
+ * code is returned.
+ *
+ * @device_path: device path of the loaded image
+ * @file_path: file path of the loaded image
+ * @handle_ptr: handle of the loaded image
+ * @info_ptr: loaded image protocol
+ * Return: status code
*/
efi_status_t efi_setup_loaded_image(struct efi_device_path *device_path,
struct efi_device_path *file_path,
struct efi_loaded_image **info_ptr)
{
efi_status_t ret;
- struct efi_loaded_image *info;
- struct efi_loaded_image_obj *obj;
+ struct efi_loaded_image *info = NULL;
+ struct efi_loaded_image_obj *obj = NULL;
+ struct efi_device_path *dp;
+
+ /* In case of EFI_OUT_OF_RESOURCES avoid illegal free by caller. */
+ *handle_ptr = NULL;
+ *info_ptr = NULL;
info = calloc(1, sizeof(*info));
if (!info)
}
/* Add internal object to object list */
- efi_add_handle(&obj->parent);
-
- if (info_ptr)
- *info_ptr = info;
- if (handle_ptr)
- *handle_ptr = obj;
+ efi_add_handle(&obj->header);
info->revision = EFI_LOADED_IMAGE_PROTOCOL_REVISION;
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->parent.handle,
- &efi_guid_device_path, device_path);
- if (ret != EFI_SUCCESS)
+
+ dp = efi_dp_append(device_path, file_path);
+ if (!dp) {
+ ret = EFI_OUT_OF_RESOURCES;
goto failure;
+ }
+ } else {
+ dp = NULL;
}
+ ret = efi_add_protocol(&obj->header,
+ &efi_guid_loaded_image_device_path, dp);
+ 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->parent.handle,
+ ret = efi_add_protocol(&obj->header,
&efi_guid_loaded_image, info);
if (ret != EFI_SUCCESS)
goto failure;
+ *info_ptr = info;
+ *handle_ptr = obj;
+
return ret;
failure:
printf("ERROR: Failure to install protocols for loaded image\n");
+ efi_delete_handle(&obj->header);
+ free(info);
return ret;
}
/**
* efi_load_image_from_path() - 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
+ * Read a file into a buffer allocated as EFI_BOOT_SERVICES_DATA. It is the
+ * callers obligation to update the memory type as needed.
+ *
+ * @file_path: the path of the image to load
+ * @buffer: buffer containing the loaded image
+ * @size: size of the loaded image
+ * Return: status code
*/
+static
efi_status_t efi_load_image_from_path(struct efi_device_path *file_path,
- void **buffer)
+ void **buffer, efi_uintn_t *size)
{
struct efi_file_info *info = NULL;
struct efi_file_handle *f;
static efi_status_t ret;
+ u64 addr;
efi_uintn_t bs;
+ /* In case of failure nothing is returned */
+ *buffer = NULL;
+ *size = 0;
+
+ /* Open file */
f = efi_file_from_path(file_path);
if (!f)
return EFI_DEVICE_ERROR;
+ /* Get file size */
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)
+ if (ret != EFI_BUFFER_TOO_SMALL) {
+ ret = EFI_DEVICE_ERROR;
goto error;
+ }
- ret = efi_allocate_pool(EFI_LOADER_DATA, info->file_size, buffer);
- if (ret)
+ info = malloc(bs);
+ EFI_CALL(ret = f->getinfo(f, (efi_guid_t *)&efi_file_info_guid, &bs,
+ info));
+ if (ret != EFI_SUCCESS)
goto error;
+ /*
+ * When reading the file we do not yet know if it contains an
+ * application, a boottime driver, or a runtime driver. So here we
+ * allocate a buffer as EFI_BOOT_SERVICES_DATA. The caller has to
+ * update the reservation according to the image type.
+ */
bs = info->file_size;
- EFI_CALL(ret = f->read(f, &bs, *buffer));
-
-error:
- free(info);
- EFI_CALL(f->close(f));
-
+ ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
+ EFI_BOOT_SERVICES_DATA,
+ efi_size_in_pages(bs), &addr);
if (ret != EFI_SUCCESS) {
- efi_free_pool(*buffer);
- *buffer = NULL;
+ ret = EFI_OUT_OF_RESOURCES;
+ goto error;
}
+ /* Read file */
+ EFI_CALL(ret = f->read(f, &bs, (void *)(uintptr_t)addr));
+ if (ret != EFI_SUCCESS)
+ efi_free_pages(addr, efi_size_in_pages(bs));
+ *buffer = (void *)(uintptr_t)addr;
+ *size = bs;
+error:
+ EFI_CALL(f->close(f));
+ free(info);
return ret;
}
*
* 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,
- efi_uintn_t source_size,
- efi_handle_t *image_handle)
+efi_status_t EFIAPI efi_load_image(bool boot_policy,
+ efi_handle_t parent_image,
+ struct efi_device_path *file_path,
+ void *source_buffer,
+ efi_uintn_t source_size,
+ efi_handle_t *image_handle)
{
- struct efi_loaded_image *info;
+ struct efi_device_path *dp, *fp;
+ struct efi_loaded_image *info = NULL;
struct efi_loaded_image_obj **image_obj =
(struct efi_loaded_image_obj **)image_handle;
efi_status_t ret;
+ void *dest_buffer;
EFI_ENTRY("%d, %p, %pD, %p, %zd, %p", boot_policy, parent_image,
file_path, source_buffer, source_size, image_handle);
}
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(dp, fp, image_obj, &info);
- if (ret != EFI_SUCCESS)
- goto failure;
- } else {
- /* In this case, file_path is the "device" path, i.e.
- * something like a HARDWARE_DEVICE:MEMORY_MAPPED
- */
- ret = efi_setup_loaded_image(file_path, NULL, image_obj, &info);
+ ret = efi_load_image_from_path(file_path, &dest_buffer,
+ &source_size);
if (ret != EFI_SUCCESS)
goto error;
+ } else {
+ dest_buffer = source_buffer;
+ }
+ /* 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(dp, fp, image_obj, &info);
+ if (ret == EFI_SUCCESS)
+ ret = efi_load_pe(*image_obj, dest_buffer, info);
+ if (!source_buffer)
+ /* Release buffer to which file was loaded */
+ efi_free_pages((uintptr_t)dest_buffer,
+ efi_size_in_pages(source_size));
+ if (ret == EFI_SUCCESS) {
+ info->system_table = &systab;
+ info->parent_handle = parent_image;
+ } else {
+ /* The image is invalid. Release all associated resources. */
+ efi_delete_handle(*image_handle);
+ *image_handle = NULL;
+ free(info);
}
- (*image_obj)->entry = efi_load_pe(*image_obj, source_buffer, info);
- if (!(*image_obj)->entry) {
- ret = EFI_UNSUPPORTED;
- goto failure;
- }
- info->system_table = &systab;
- info->parent_handle = parent_image;
- return EFI_EXIT(EFI_SUCCESS);
-failure:
- efi_delete_handle(*image_handle);
- *image_handle = NULL;
- free(info);
error:
return EFI_EXIT(ret);
}
-/**
- * efi_start_image() - call the entry point of an image
- * @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
- *
- * This function implements the StartImage service.
- *
- * See the Unified Extensible Firmware Interface (UEFI) specification for
- * details.
- *
- * Return: status code
- */
-static efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
- unsigned long *exit_data_size,
- s16 **exit_data)
-{
- struct efi_loaded_image_obj *image_obj =
- (struct efi_loaded_image_obj *)image_handle;
- efi_status_t ret;
-
- EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
-
- /* call the image! */
- if (setjmp(&image_obj->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)image_obj->exit_status &
- ~EFI_ERROR_MASK));
- return EFI_EXIT(image_obj->exit_status);
- }
-
- ret = EFI_CALL(image_obj->entry(image_handle, &systab));
-
- /*
- * Usually UEFI applications call Exit() instead of returning.
- * But because the world doesn't 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));
-}
-
-/**
- * efi_exit() - leave an EFI application or driver
- * @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
- *
- * This function implements the Exit service.
- *
- * See the Unified Extensible Firmware Interface (UEFI) specification for
- * details.
- *
- * 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)
-{
- /*
- * TODO: We should call the unload procedure of the loaded
- * image protocol.
- */
- struct efi_loaded_image_obj *image_obj =
- (struct efi_loaded_image_obj *)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();
-
- image_obj->exit_status = exit_status;
- longjmp(&image_obj->exit_jmp, 1);
-
- panic("EFI application exited");
-}
-
/**
* efi_unload_image() - unload an EFI image
* @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)
+efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle)
{
struct efi_object *efiobj;
return EFI_EXIT(EFI_SUCCESS);
}
+/**
+ * efi_exit_caches() - 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
+}
+
/**
* efi_exit_boot_services() - stop all boot services
* @image_handle: handle of the loaded image
board_quiesce_devices();
+ /* Fix up caches for EFI payloads if necessary */
+ efi_exit_caches();
+
/* This stops all lingering devices */
bootm_disable_interrupts();
efiobj = list_entry(lhandle, struct efi_object, link);
- ret = efi_search_protocol(efiobj->handle, protocol, &handler);
+ ret = efi_search_protocol(efiobj, protocol, &handler);
if (ret == EFI_SUCCESS) {
*protocol_interface = handler->protocol_interface;
return EFI_EXIT(EFI_SUCCESS);
*
* Return: status code
*/
-static efi_status_t EFIAPI efi_install_multiple_protocol_interfaces(
- void **handle, ...)
+efi_status_t EFIAPI efi_install_multiple_protocol_interfaces
+ (efi_handle_t *handle, ...)
{
EFI_ENTRY("%p", handle);
for (; i; --i) {
protocol = efi_va_arg(argptr, efi_guid_t*);
protocol_interface = efi_va_arg(argptr, void*);
- EFI_CALL(efi_uninstall_protocol_interface(handle, protocol,
+ EFI_CALL(efi_uninstall_protocol_interface(*handle, protocol,
protocol_interface));
}
efi_va_end(argptr);
* Return: status code
*/
static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces(
- void *handle, ...)
+ efi_handle_t handle, ...)
{
EFI_ENTRY("%p", handle);
if (!protocol)
break;
protocol_interface = efi_va_arg(argptr, void*);
- r = EFI_CALL(efi_uninstall_protocol_interface(
- handle, protocol,
- protocol_interface));
+ r = efi_uninstall_protocol(handle, protocol,
+ protocol_interface);
if (r != EFI_SUCCESS)
break;
i++;
}
efi_va_end(argptr);
- if (r == EFI_SUCCESS)
+ if (r == EFI_SUCCESS) {
+ /* If the last protocol has been removed, delete the handle. */
+ if (list_empty(&handle->protocols)) {
+ list_del(&handle->link);
+ free(handle);
+ }
return EFI_EXIT(r);
+ }
/* If an error occurred undo all changes. */
efi_va_start(argptr, handle);
}
efi_va_end(argptr);
- return EFI_EXIT(r);
+ /* In case of an error always return EFI_INVALID_PARAMETER */
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
}
/**
size_t length)
{
EFI_ENTRY("%p, %p, %ld", destination, source, (unsigned long)length);
- memcpy(destination, source, length);
+ memmove(destination, source, length);
EFI_EXIT(EFI_SUCCESS);
}
if (item->info.attributes & EFI_OPEN_PROTOCOL_BY_DRIVER)
opened_by_driver = true;
}
- /* Only one controller can be conncected */
+ /* Only one controller can be connected */
if (opened_by_driver)
return EFI_ACCESS_DENIED;
}
*
* 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)
+static efi_status_t EFIAPI efi_open_protocol
+ (efi_handle_t handle, const efi_guid_t *protocol,
+ void **protocol_interface, efi_handle_t agent_handle,
+ efi_handle_t controller_handle, uint32_t attributes)
{
struct efi_handler *handler;
efi_status_t r = EFI_INVALID_PARAMETER;
return EFI_EXIT(r);
}
+/**
+ * efi_start_image() - call the entry point of an image
+ * @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
+ *
+ * This function implements the StartImage service.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * Return: status code
+ */
+efi_status_t EFIAPI efi_start_image(efi_handle_t image_handle,
+ efi_uintn_t *exit_data_size,
+ u16 **exit_data)
+{
+ struct efi_loaded_image_obj *image_obj =
+ (struct efi_loaded_image_obj *)image_handle;
+ efi_status_t ret;
+ void *info;
+ efi_handle_t parent_image = current_image;
+
+ EFI_ENTRY("%p, %p, %p", image_handle, exit_data_size, exit_data);
+
+ /* Check parameters */
+ ret = EFI_CALL(efi_open_protocol(image_handle, &efi_guid_loaded_image,
+ &info, NULL, NULL,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL));
+ if (ret != EFI_SUCCESS)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+
+ efi_is_direct_boot = false;
+
+ image_obj->exit_data_size = exit_data_size;
+ image_obj->exit_data = exit_data;
+
+ /* call the image! */
+ if (setjmp(&image_obj->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)image_obj->exit_status &
+ ~EFI_ERROR_MASK));
+ current_image = parent_image;
+ return EFI_EXIT(image_obj->exit_status);
+ }
+
+ current_image = image_handle;
+ EFI_PRINT("Jumping into 0x%p\n", image_obj->entry);
+ ret = EFI_CALL(image_obj->entry(image_handle, &systab));
+
+ /*
+ * Usually UEFI applications call Exit() instead of returning.
+ * But because the world doesn't 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));
+}
+
+/**
+ * efi_update_exit_data() - fill exit data parameters of StartImage()
+ *
+ * @image_obj image handle
+ * @exit_data_size size of the exit data buffer
+ * @exit_data buffer with data returned by UEFI payload
+ * Return: status code
+ */
+static efi_status_t efi_update_exit_data(struct efi_loaded_image_obj *image_obj,
+ efi_uintn_t exit_data_size,
+ u16 *exit_data)
+{
+ efi_status_t ret;
+
+ /*
+ * If exit_data is not provided to StartImage(), exit_data_size must be
+ * ignored.
+ */
+ if (!image_obj->exit_data)
+ return EFI_SUCCESS;
+ if (image_obj->exit_data_size)
+ *image_obj->exit_data_size = exit_data_size;
+ if (exit_data_size && exit_data) {
+ ret = efi_allocate_pool(EFI_BOOT_SERVICES_DATA,
+ exit_data_size,
+ (void **)image_obj->exit_data);
+ if (ret != EFI_SUCCESS)
+ return ret;
+ memcpy(*image_obj->exit_data, exit_data, exit_data_size);
+ } else {
+ image_obj->exit_data = NULL;
+ }
+ return EFI_SUCCESS;
+}
+
+/**
+ * efi_exit() - leave an EFI application or driver
+ * @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
+ *
+ * This function implements the Exit service.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * Return: status code
+ */
+static efi_status_t EFIAPI efi_exit(efi_handle_t image_handle,
+ efi_status_t exit_status,
+ efi_uintn_t exit_data_size,
+ u16 *exit_data)
+{
+ /*
+ * TODO: We should call the unload procedure of the loaded
+ * image protocol.
+ */
+ efi_status_t ret;
+ void *info;
+ struct efi_loaded_image_obj *image_obj =
+ (struct efi_loaded_image_obj *)image_handle;
+
+ EFI_ENTRY("%p, %ld, %zu, %p", image_handle, exit_status,
+ exit_data_size, exit_data);
+
+ /* Check parameters */
+ if (image_handle != current_image)
+ goto out;
+ ret = EFI_CALL(efi_open_protocol(image_handle, &efi_guid_loaded_image,
+ &info, NULL, NULL,
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL));
+ if (ret != EFI_SUCCESS)
+ goto out;
+
+ /* Exit data is only foreseen in case of failure. */
+ if (exit_status != EFI_SUCCESS) {
+ ret = efi_update_exit_data(image_obj, exit_data_size,
+ exit_data);
+ /* Exiting has priority. Don't return error to caller. */
+ if (ret != EFI_SUCCESS)
+ EFI_PRINT("%s: out of memory\n", __func__);
+ }
+
+ /* 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();
+
+ image_obj->exit_status = exit_status;
+ longjmp(&image_obj->exit_jmp, 1);
+
+ panic("EFI application exited");
+out:
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+}
+
/**
* efi_handle_protocol() - get interface of a protocol on a handle
* @handle: handle on which the protocol shall be opened
efi_status_t ret = EFI_NOT_FOUND;
struct efi_object *efiobj;
- EFI_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
+ EFI_ENTRY("%p, %p, %pD, %d", controller_handle, driver_image_handle,
remain_device_path, recursive);
efiobj = efi_search_obj(controller_handle);
EFI_ENTRY("%p, %pUl, %p, %p", handle, protocol, old_interface,
new_interface);
- ret = EFI_CALL(efi_uninstall_protocol_interface(handle, protocol,
- old_interface));
+
+ /* Uninstall protocol but do not delete handle */
+ ret = efi_uninstall_protocol(handle, protocol, old_interface);
if (ret != EFI_SUCCESS)
goto out;
- ret = EFI_CALL(efi_install_protocol_interface(&handle, protocol,
- EFI_NATIVE_INTERFACE,
- new_interface));
+
+ /* Install the new protocol */
+ ret = efi_add_protocol(handle, protocol, new_interface);
+ /*
+ * The UEFI spec does not specify what should happen to the handle
+ * if in case of an error no protocol interface remains on the handle.
+ * So let's do nothing here.
+ */
if (ret != EFI_SUCCESS)
goto out;
/*
projects / oweals / u-boot.git / blobdiff