+// SPDX-License-Identifier: GPL-2.0+
/*
* EFI application boot time services
*
* Copyright (c) 2016 Alexander Graf
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <efi_loader.h>
#include <environment.h>
#include <malloc.h>
-#include <asm/global_data.h>
-#include <libfdt_env.h>
+#include <linux/libfdt_env.h>
#include <u-boot/crc.h>
#include <bootm.h>
#include <inttypes.h>
/* 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
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)
}
/*
- * Two spaces per indent level, maxing out at 10.. which ought to be
- * enough for anyone ;-)
+ * 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];
}
* 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)
+static void efi_queue_event(struct efi_event *event, bool check_tpl)
{
if (event->notify_function) {
event->is_queued = true;
/* Check TPL */
- if (efi_tpl >= event->notify_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.
*
if (efi_tpl > TPL_HIGH_LEVEL)
efi_tpl = TPL_HIGH_LEVEL;
+ /*
+ * Lowering the TPL may have made queued events eligible for execution.
+ */
+ efi_timer_check();
+
EFI_EXIT(EFI_SUCCESS);
}
{
efi_status_t r;
- EFI_ENTRY("%"PRIx64", 0x%zx", memory, pages);
+ EFI_ENTRY("%" PRIx64 ", 0x%zx", memory, pages);
r = efi_free_pages(memory, pages);
return EFI_EXIT(r);
}
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(void **handle)
+efi_status_t efi_create_handle(efi_handle_t *handle)
{
struct efi_object *obj;
efi_status_t r;
(void **)&obj);
if (r != EFI_SUCCESS)
return r;
- memset(obj, 0, sizeof(struct efi_object));
- obj->handle = obj;
- INIT_LIST_HEAD(&obj->protocols);
- list_add_tail(&obj->link, &efi_obj_list);
- *handle = obj;
+ efi_add_handle(obj);
+ *handle = obj->handle;
return r;
}
/*
- * Our event capabilities are very limited. Only a small limited
- * number of events is allowed to coexist.
+ * 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
*/
-static struct efi_event efi_events[16];
+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;
+ if (handler->protocol_interface != protocol_interface)
+ 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.
void (EFIAPI *notify_function) (
struct efi_event *event,
void *context),
- void *notify_context, struct efi_event **event)
+ void *notify_context, efi_guid_t *group,
+ struct efi_event **event)
{
- int i;
+ 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)) &&
+ if ((type & (EVT_NOTIFY_SIGNAL | EVT_NOTIFY_WAIT)) &&
notify_function == NULL)
return EFI_INVALID_PARAMETER;
- for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
- if (efi_events[i].type)
- continue;
- efi_events[i].type = type;
- efi_events[i].notify_tpl = notify_tpl;
- efi_events[i].notify_function = notify_function;
- efi_events[i].notify_context = notify_context;
- /* Disable timers on bootup */
- efi_events[i].trigger_next = -1ULL;
- efi_events[i].is_queued = false;
- efi_events[i].is_signaled = false;
- *event = &efi_events[i];
- return EFI_SUCCESS;
- }
- return EFI_OUT_OF_RESOURCES;
+ 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));
}
/*
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, event));
+ notify_context, NULL, event));
}
-
/*
* Check if a timer event has occurred or a queued notification function should
* be called.
*/
void efi_timer_check(void)
{
- int i;
+ struct efi_event *evt;
u64 now = timer_get_us();
- for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
- if (!efi_events[i].type)
- continue;
- if (efi_events[i].is_queued)
- efi_signal_event(&efi_events[i]);
- if (!(efi_events[i].type & EVT_TIMER) ||
- now < efi_events[i].trigger_next)
+ 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 (efi_events[i].trigger_type) {
+ switch (evt->trigger_type) {
case EFI_TIMER_RELATIVE:
- efi_events[i].trigger_type = EFI_TIMER_STOP;
+ evt->trigger_type = EFI_TIMER_STOP;
break;
case EFI_TIMER_PERIODIC:
- efi_events[i].trigger_next +=
- efi_events[i].trigger_time;
+ evt->trigger_next += evt->trigger_time;
break;
default:
continue;
}
- efi_events[i].is_signaled = true;
- efi_signal_event(&efi_events[i]);
+ evt->is_signaled = false;
+ efi_signal_event(evt, true);
}
WATCHDOG_RESET();
}
efi_status_t efi_set_timer(struct efi_event *event, enum efi_timer_delay type,
uint64_t trigger_time)
{
- int i;
+ /* 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.
*/
do_div(trigger_time, 10);
- for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
- if (event != &efi_events[i])
- continue;
-
- if (!(event->type & EVT_TIMER))
- break;
- 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;
+ 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;
}
- return EFI_INVALID_PARAMETER;
+ event->trigger_type = type;
+ event->trigger_time = trigger_time;
+ event->is_signaled = false;
+ return EFI_SUCCESS;
}
/*
enum efi_timer_delay type,
uint64_t trigger_time)
{
- EFI_ENTRY("%p, %d, %"PRIx64, event, type, trigger_time);
+ EFI_ENTRY("%p, %d, %" PRIx64, event, type, trigger_time);
return EFI_EXIT(efi_set_timer(event, type, trigger_time));
}
struct efi_event **event,
efi_uintn_t *index)
{
- int i, j;
+ int i;
EFI_ENTRY("%zd, %p, %p", num_events, event, index);
if (efi_tpl != TPL_APPLICATION)
return EFI_EXIT(EFI_UNSUPPORTED);
for (i = 0; i < num_events; ++i) {
- for (j = 0; j < ARRAY_SIZE(efi_events); ++j) {
- if (event[i] == &efi_events[j])
- goto known_event;
- }
- return EFI_EXIT(EFI_INVALID_PARAMETER);
-known_event:
+ 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_signal_event(event[i]);
+ efi_queue_event(event[i], true);
}
/* Wait for signal */
*/
static efi_status_t EFIAPI efi_signal_event_ext(struct efi_event *event)
{
- int i;
-
EFI_ENTRY("%p", event);
- for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
- if (event != &efi_events[i])
- continue;
- if (event->is_signaled)
- break;
- event->is_signaled = true;
- if (event->type & EVT_NOTIFY_SIGNAL)
- efi_signal_event(event);
- break;
- }
+ if (efi_is_event(event) != EFI_SUCCESS)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+ efi_signal_event(event, true);
return EFI_EXIT(EFI_SUCCESS);
}
*/
static efi_status_t EFIAPI efi_close_event(struct efi_event *event)
{
- int i;
-
EFI_ENTRY("%p", event);
- for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
- if (event == &efi_events[i]) {
- event->type = 0;
- event->trigger_next = -1ULL;
- event->is_queued = false;
- event->is_signaled = false;
- return EFI_EXIT(EFI_SUCCESS);
- }
- }
- return EFI_EXIT(EFI_INVALID_PARAMETER);
+ if (efi_is_event(event) != EFI_SUCCESS)
+ return EFI_EXIT(EFI_INVALID_PARAMETER);
+ list_del(&event->link);
+ free(event);
+ return EFI_EXIT(EFI_SUCCESS);
}
/*
* See the Unified Extensible Firmware Interface (UEFI) specification
* for details.
*
- * If an event is not signaled yet the notification function is queued.
+ * 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)
{
- int i;
-
EFI_ENTRY("%p", event);
efi_timer_check();
- for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
- if (event != &efi_events[i])
- continue;
- if (!event->type || event->type & EVT_NOTIFY_SIGNAL)
- break;
- if (!event->is_signaled)
- efi_signal_event(event);
- if (event->is_signaled)
- return EFI_EXIT(EFI_SUCCESS);
- return EFI_EXIT(EFI_NOT_READY);
+ 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_INVALID_PARAMETER);
+ return EFI_EXIT(EFI_NOT_READY);
}
/*
* @handle handle to find
* @return EFI object
*/
-struct efi_object *efi_search_obj(const void *handle)
+struct efi_object *efi_search_obj(const efi_handle_t handle)
{
struct efi_object *efiobj;
}
/*
- * Find a protocol on a handle.
+ * Create open protocol info entry and add it to a protocol.
*
- * @handle handle
- * @protocol_guid GUID of the protocol
- * @handler reference to the protocol
- * @return status code
+ * @handler handler of a protocol
+ * @return open protocol info entry
*/
-efi_status_t efi_search_protocol(const void *handle,
- const efi_guid_t *protocol_guid,
- struct efi_handler **handler)
+static struct efi_open_protocol_info_entry *efi_create_open_info(
+ struct efi_handler *handler)
{
- struct efi_object *efiobj;
- struct list_head *lhandle;
+ struct efi_open_protocol_info_item *item;
- 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;
+ 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);
- 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;
+ 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;
}
/*
* @protocol_interface interface of the protocol implementation
* @return status code
*/
-efi_status_t efi_add_protocol(const void *handle, const efi_guid_t *protocol,
+efi_status_t efi_add_protocol(const efi_handle_t handle,
+ const efi_guid_t *protocol,
void *protocol_interface)
{
struct efi_object *efiobj;
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);
- return EFI_SUCCESS;
-}
-
-/*
- * 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 void *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 void *handle)
-{
- struct efi_object *efiobj;
- struct list_head *lhandle;
- struct list_head *pos;
-
- efiobj = efi_search_obj(handle);
- if (!efiobj)
- return EFI_INVALID_PARAMETER;
- list_for_each_safe(lhandle, pos, &efiobj->protocols) {
- struct efi_handler *protocol;
- efi_status_t ret;
-
- protocol = list_entry(lhandle, struct efi_handler, link);
-
- ret = efi_remove_protocol(handle, protocol->guid,
- protocol->protocol_interface);
- if (ret != EFI_SUCCESS)
- return ret;
- }
+ if (!guidcmp(&efi_guid_device_path, protocol))
+ EFI_PRINT("installed device path '%pD'\n", protocol_interface);
return EFI_SUCCESS;
}
* @new_interface interface to be installed
* @return status code
*/
-static efi_status_t EFIAPI efi_reinstall_protocol_interface(void *handle,
- const efi_guid_t *protocol, void *old_interface,
- void *new_interface)
+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.
*
* @return status code
*/
static efi_status_t EFIAPI efi_uninstall_protocol_interface(
- void *handle, const efi_guid_t *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 *item;
+ struct efi_open_protocol_info_item *pos;
efi_status_t r;
EFI_ENTRY("%p, %pUl, %p", handle, protocol, protocol_interface);
- if (!handle || !protocol) {
+ /* 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;
- if (handler->protocol_interface) {
- /* TODO disconnect controllers */
+ /* Disconnect controllers */
+ efi_disconnect_all_drivers(efiobj, protocol, NULL);
+ if (!list_empty(&handler->open_infos)) {
r = EFI_ACCESS_DENIED;
- } else {
- r = efi_remove_protocol(handle, protocol, protocol_interface);
+ 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);
}
/* 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*);
+ size += sizeof(void *);
}
if (*buffer_size < size) {
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 *next = &efi_conf_table[i + 1];
struct efi_configuration_table *end = &efi_conf_table[systab.nr_tables];
memmove(this, next, (ulong)end - (ulong)next);
* @table table to be installed
* @return status code
*/
-efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table)
+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)) {
efi_conf_table[i].table = table;
else
efi_remove_configuration_table(i);
- return EFI_SUCCESS;
+ goto out;
}
}
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;
}
* @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
*/
-void 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 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);
- INIT_LIST_HEAD(&obj->protocols);
- list_add_tail(&obj->link, &efi_obj_list);
- /*
- * 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;
+ 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
if (ret != EFI_SUCCESS)
goto failure;
- ret = efi_add_protocol(obj->handle, &efi_guid_console_control,
- (void *)&efi_console_control);
+ 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_to_text_protocol,
- (void *)&efi_device_path_to_text);
+ &efi_guid_device_path_utilities_protocol,
+ (void *)&efi_device_path_utilities);
if (ret != EFI_SUCCESS)
goto failure;
- return;
+ return ret;
failure:
printf("ERROR: Failure to install protocols for loaded image\n");
+ return ret;
}
/*
struct efi_file_info *info = NULL;
struct efi_file_handle *f;
static efi_status_t ret;
- uint64_t bs;
+ efi_uintn_t bs;
f = efi_file_from_path(file_path);
if (!f)
if (ret)
goto error;
- EFI_CALL(ret = f->read(f, &info->file_size, *buffer));
+ bs = info->file_size;
+ EFI_CALL(ret = f->read(f, &bs, *buffer));
error:
free(info);
* for details.
*
* @boot_policy true for request originating from the boot manager
- * @parent_image the calles's image handle
+ * @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
efi_handle_t parent_image,
struct efi_device_path *file_path,
void *source_buffer,
- unsigned long source_size,
+ efi_uintn_t source_size,
efi_handle_t *image_handle)
{
struct efi_loaded_image *info;
struct efi_object *obj;
+ efi_status_t ret;
- EFI_ENTRY("%d, %p, %p, %p, %ld, %p", boot_policy, parent_image,
+ EFI_ENTRY("%d, %p, %pD, %p, %zd, %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;
- efi_status_t ret;
ret = efi_load_image_from_path(file_path, &source_buffer);
- if (ret != EFI_SUCCESS) {
- free(info);
- free(obj);
- return EFI_EXIT(ret);
- }
-
+ 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);
-
- efi_setup_loaded_image(info, obj, 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
*/
- efi_setup_loaded_image(info, obj, file_path, NULL);
+ 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) {
- free(info);
- free(obj);
- return EFI_EXIT(EFI_UNSUPPORTED);
+ 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);
}
/*
unsigned long *exit_data_size,
s16 **exit_data)
{
- ulong (*entry)(void *image_handle, struct efi_system_table *st);
+ 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;
/* call the image! */
if (setjmp(&info->exit_jmp)) {
- /* We returned from the child image */
+ /*
+ * 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);
}
- __efi_nesting_dec();
- __efi_exit_check();
- entry(image_handle, &systab);
- __efi_entry_check();
- __efi_nesting_inc();
+ ret = EFI_CALL(entry(image_handle, &systab));
- /* Should usually never get here */
- return EFI_EXIT(EFI_SUCCESS);
+ /*
+ * 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));
}
/*
* @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)
+ efi_status_t exit_status,
+ unsigned long exit_data_size,
+ int16_t *exit_data)
{
- struct efi_loaded_image *loaded_image_info = (void*)image_handle;
+ /*
+ * 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_check();
+ EFI_EXIT(exit_status);
/*
* But longjmp out with the U-Boot gd, not the application's, as
* @image_handle handle of the image to be unloaded
* @return status code
*/
-static efi_status_t EFIAPI efi_unload_image(void *image_handle)
+static efi_status_t EFIAPI efi_unload_image(efi_handle_t image_handle)
{
struct efi_object *efiobj;
}
/*
- * Stop boot services.
+ * 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(void *image_handle,
+static efi_status_t EFIAPI efi_exit_boot_services(efi_handle_t image_handle,
unsigned long map_key)
{
- int i;
+ 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. */
- for (i = 0; i < ARRAY_SIZE(efi_events); ++i) {
- if (efi_events[i].type != EVT_SIGNAL_EXIT_BOOT_SERVICES)
- continue;
- efi_signal_event(&efi_events[i]);
+ 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;
+ }
}
- /* Make sure that notification functions are not called anymore */
- efi_tpl = TPL_HIGH_LEVEL;
- /* XXX Should persist EFI variables here */
+ /* TODO Should persist EFI variables here */
board_quiesce_devices();
/* 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();
*/
static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count)
{
- static uint64_t mono = 0;
+ static uint64_t mono;
+
EFI_ENTRY("%p", count);
*count = mono++;
return EFI_EXIT(EFI_SUCCESS);
unsigned long data_size,
uint16_t *watchdog_data)
{
- EFI_ENTRY("%ld, 0x%"PRIx64", %ld, %p", timeout, watchdog_code,
+ EFI_ENTRY("%ld, 0x%" PRIx64 ", %ld, %p", timeout, watchdog_code,
data_size, watchdog_data);
return EFI_EXIT(efi_set_watchdog(timeout));
}
-/*
- * Connect a controller to a driver.
- *
- * This function implements the ConnectController service.
- * See the Unified Extensible Firmware Interface (UEFI) specification
- * for details.
- *
- * @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_ENTRY("%p, %p, %p, %d", controller_handle, driver_image_handle,
- remain_device_path, recursive);
- return EFI_EXIT(EFI_NOT_FOUND);
-}
-
-/*
- * 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(void *controller_handle,
- void *driver_image_handle,
- void *child_handle)
-{
- EFI_ENTRY("%p, %p, %p", controller_handle, driver_image_handle,
- child_handle);
- return EFI_EXIT(EFI_INVALID_PARAMETER);
-}
-
/*
* Close a protocol.
*
* @controller_handle handle of the controller
* @return status code
*/
-static efi_status_t EFIAPI efi_close_protocol(void *handle,
+static efi_status_t EFIAPI efi_close_protocol(efi_handle_t handle,
const efi_guid_t *protocol,
- void *agent_handle,
- void *controller_handle)
+ 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);
- return EFI_EXIT(EFI_NOT_FOUND);
+
+ 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);
}
/*
* @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,
+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);
- return EFI_EXIT(EFI_NOT_FOUND);
+
+ /* 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);
}
/*
* @protocol_buffer_count number of entries in the buffer
* @return status code
*/
-static efi_status_t EFIAPI efi_protocols_per_handle(void *handle,
- efi_guid_t ***protocol_buffer,
+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;
r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
*buffer);
if (r == EFI_SUCCESS)
- *no_handles = buffer_size / sizeof(void *);
+ *no_handles = buffer_size / sizeof(efi_handle_t);
out:
return EFI_EXIT(r);
}
}
/* Find end of device path */
- len = efi_dp_size(*device_path);
+ len = efi_dp_instance_size(*device_path);
/* Get all handles implementing the protocol */
ret = EFI_CALL(efi_locate_handle_buffer(BY_PROTOCOL, protocol, NULL,
if (ret != EFI_SUCCESS)
continue;
dp = (struct efi_device_path *)handler->protocol_interface;
- len_dp = efi_dp_size(dp);
+ len_dp = efi_dp_instance_size(dp);
/*
* This handle can only be a better fit
* if its device path length is longer than the best fit and
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.
*
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:
- if (controller_handle == NULL)
+ /* Check that the controller handle is valid */
+ if (!efi_search_obj(controller_handle))
goto out;
+ /* fall-through */
case EFI_OPEN_PROTOCOL_EXCLUSIVE:
- if (agent_handle == NULL)
+ /* Check that the agent handle is valid */
+ if (!efi_search_obj(agent_handle))
goto out;
break;
default:
if (r != EFI_SUCCESS)
goto out;
- if (attributes != EFI_OPEN_PROTOCOL_TEST_PROTOCOL)
- *protocol_interface = handler->protocol_interface;
+ r = efi_protocol_open(handler, protocol_interface, agent_handle,
+ controller_handle, attributes);
out:
return EFI_EXIT(r);
}
* @protocol_interface interface implementing the protocol
* @return status code
*/
-static efi_status_t EFIAPI efi_handle_protocol(void *handle,
+static efi_status_t EFIAPI efi_handle_protocol(efi_handle_t handle,
const efi_guid_t *protocol,
void **protocol_interface)
{
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),
.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,
+ .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[] =
- { 'D','a','s',' ','U','-','b','o','o','t',0 };
+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 = 0x20005, /* 2.5 */
+ .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,
+ .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,
+ .tables = (void *)efi_conf_table,
};
projects / u-boot / blobdiff