e8cea74e9b
LK already has events APIs. To support events protocols in UEFI spec, I created a wrapper object for LK events. This wrapper object keeps additional data that are necessary to support UEFI events spec: * Notification function, or callbacks * Argument for the notification function * Type of this UEFI event (which specifies when the callback should be called) The events API is essential for supporting async I/O in UEFI. Intended use case looks like: * UEFI app creates an event object, attatch callback to this event * UEFI app calls LK for asynchronous read/write on a block device, with the newly created events object * LK executes IO operation in background, after IO finishes, signal the specified event object * UEFI's callback gets executed
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
/*
|
|
* Copyright (C) 2024 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
*/
|
|
|
|
#include "configuration_table.h"
|
|
|
|
#include <libfdt.h>
|
|
#include <string.h>
|
|
#include <uefi/system_table.h>
|
|
|
|
#include "memory_protocols.h"
|
|
#include "platform.h"
|
|
|
|
void setup_configuration_table(EfiSystemTable *table) {
|
|
auto &rng = table->configuration_table[table->number_of_table_entries++];
|
|
rng.vendor_guid = LINUX_EFI_RANDOM_SEED_TABLE_GUID;
|
|
rng.vendor_table = alloc_page(PAGE_SIZE);
|
|
auto rng_seed = reinterpret_cast<linux_efi_random_seed *>(rng.vendor_table);
|
|
rng_seed->size = 512;
|
|
memset(&rng_seed->bits, 0, rng_seed->size);
|
|
|
|
const void *fdt = get_fdt();
|
|
if (fdt != nullptr) {
|
|
auto &dtb = table->configuration_table[table->number_of_table_entries++];
|
|
dtb.vendor_guid = DEVICE_TREE_GUID;
|
|
const auto fdt_size = fdt_totalsize(fdt);
|
|
dtb.vendor_table = alloc_page(fdt_size);
|
|
memcpy(dtb.vendor_table, fdt, fdt_size);
|
|
}
|
|
} |