+// 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 <linux/libfdt_env.h>
#include <u-boot/crc.h>
#include <bootm.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
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,
* @event event to signal
* @check_tpl check the TPL level
*/
-void efi_signal_event(struct efi_event *event, bool check_tpl)
+static void efi_queue_event(struct efi_event *event, bool check_tpl)
{
if (event->notify_function) {
event->is_queued = true;
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);
}
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;
}
/*
- * Our event capabilities are very limited. Only a small limited
- * number of events is allowed to coexist.
+ * Check if a pointer is a valid event.
+ *
+ * @event pointer to check
+ * @return status code
*/
-static struct efi_event efi_events[16];
+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;
}
/*
{
EFI_ENTRY("%d, 0x%zx, %p, %p, %pUl", type, notify_tpl, notify_function,
notify_context, event_group);
- if (event_group)
- return EFI_EXIT(EFI_UNSUPPORTED);
return EFI_EXIT(efi_create_event(type, notify_tpl, notify_function,
- notify_context, event));
+ 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));
}
/*
*/
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], true);
- 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], true);
+ 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;
}
/*
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], true);
+ 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, true);
- 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);
}
/*
*/
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, true);
- if (event->is_signaled) {
- event->is_signaled = false;
- 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);
}
/*
efi_status_t efi_install_configuration_table(const efi_guid_t *guid,
void *table)
{
+ struct efi_event *evt;
int i;
if (!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;
}
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);
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, %pD, %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) {
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);
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_events[i].is_signaled = true;
- efi_signal_event(&efi_events[i], false);
+ 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 */
}
/* 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
projects / u-boot / blobdiff