skmhss/google3/host_commands.h

/*
 * Copyright 2024 Google LLC
 *
 * 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.
 */

#ifndef __PRIVATE_CR51_INCLUDE_CR51_HOST_COMMANDS_H
#define __PRIVATE_CR51_INCLUDE_CR51_HOST_COMMANDS_H

#include <stdint.h>

/* Read/Write/Erase Hoth's copy of SKM HSS persisted to gNVRAM. */
#define EC_PRV_CMD_HOTH_SKM_HSS 0x0015

#define SKM_HSS_STRUCT_SIZE 64
enum skm_hss_op
{
    SKM_HSS_READ = 0,
    SKM_HSS_WRITE = 1,
    SKM_HSS_DELETE = 2,
};

/* Serves as the response to SKM_HSS_READ as well as payload to SKM_HSS_WRITE.
 */
struct ec_payload_skm_hss
{
    uint8_t data[SKM_HSS_STRUCT_SIZE];
} __attribute__((packed));

struct ec_request_skm_hss
{
    /* The operation is one of skm_hss_op. */
    uint32_t operation;
    /* Choose which (0-3) HSS to operate on. */
    uint32_t slot;
    struct ec_payload_skm_hss payload;
} __attribute__((packed));

#endif /* __PRIVATE_CR51_INCLUDE_CR51_HOST_COMMANDS_H */