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/*
* Copyright (C) 2019 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.
*/
#ifndef __CROS_EC_INCLUDE_CITADEL_EVENTS_H
#define __CROS_EC_INCLUDE_CITADEL_EVENTS_H
#include <assert.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifndef __packed
#define __packed __attribute__((packed))
#endif
/*
* When Citadel needs to tell the AP something without waiting to be asked, the
* process is as follows:
*
* 1. Citadel adds an event_record to its internal queue, then asserts
* the CTDL_AP_IRQ signal to notify the AP.
*
* 2. The AP (citadeld) requests pending events from Citadel until they've
* all been retrieved.
*
* 3. Citadel deasserts CTDL_AP_IRQ.
*
* Because we may want to compare the history and evolution of events over a
* long time and for multiple releases, we should only APPEND to this file
* instead of changing things.
*/
/*
* Event priority. Stored events of lower priority will be evicted to store
* higher-priority events if the queue is full.
*/
enum event_priority {
EVENT_PRIORITY_LOW = 0,
EVENT_PRIORITY_MEDIUM = 1,
EVENT_PRIORITY_HIGH = 2,
};
/*
* Event ID values live forever.
* Add to the list, but NEVER change or delete existing entries.
*/
enum event_id {
EVENT_NONE = 0, // Unused ID, used as empty marker.
EVENT_ALERT = 1, // Globalsec alert fired.
EVENT_REBOOTED = 2, // Device rebooted.
EVENT_UPGRADED = 3, // Device has upgraded.
EVENT_ALERT_V2 = 4, // Globalsec Alertv2 fired
};
/* Please do not change the size of this struct */
#define EVENT_RECORD_SIZE 64
struct event_record {
uint64_t reset_count; /* zeroed by Citadel power cycle */
uint64_t uptime_usecs; /* since last Citadel reset */
uint32_t id;
uint32_t priority;
union {
/* id-specific information goes here */
struct {
uint32_t intr_sts[3];
} alert;
struct {
uint32_t rstsrc;
uint32_t exitpd;
uint32_t which0;
uint32_t which1;
} rebooted;
struct {
uint32_t alert_grp[4];
uint16_t camo_breaches[2];
uint16_t temp_min;
uint16_t temp_max;
uint32_t bus_err;
} alert_v2;
/* uninterpreted */
union {
uint32_t w[10];
uint16_t h[20];
uint8_t b[40];
} raw;
} event;
} __packed;
/* Please do not change the size of this struct */
static_assert(sizeof(struct event_record) == EVENT_RECORD_SIZE,
"Muting the Immutable");
#ifdef __cplusplus
}
#endif
#endif /* __CROS_EC_INCLUDE_CITADEL_EVENTS_H */
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