98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
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/* Copyright 2017 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* chip/g-specific system function prototypes */
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#ifndef __CROS_EC_SYSTEM_CHIP_H
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#define __CROS_EC_SYSTEM_CHIP_H
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/**
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* On systems with protection from a failing RW update: read the retry counter
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* and act on it.
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*
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* @return EC_SUCCESS if no flash write errors were encounterd.
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*/
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int system_process_retry_counter(void);
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/**
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* On systems with protection from a failing RW update: reset retry
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* counter, this is used after a new image upload is finished, to make
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* sure that the new image has a chance to run.
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*/
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void system_clear_retry_counter(void);
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/**
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* A function provided by some platforms to decrement a retry counter.
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*
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* This should be used whenever a system reset is manually triggered.
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*/
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void system_decrement_retry_counter(void);
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/**
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* A function provided by some platforms to hint that something is going
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* wrong.
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*
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* @return a boolean, set to True if rolling reboot condition is suspected.
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*/
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int system_rolling_reboot_suspected(void);
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/**
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* Returns True if a rollback was detected during system_preinit.
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*
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* system_rollback_detected only returns True from rollback until the AP boots
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* and then enters deep sleep. The system won't know that it rolled back on
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* resume from deep sleep.
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*
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* @return a boolean, set to True if a rollback is detected.
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*/
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int system_rollback_detected(void);
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/**
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* Returns non-zero value when firmware is expected to be abe to detect user
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* request to cut off battery supply.
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*/
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int system_battery_cutoff_support_required(void);
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/**
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* Functions to update INFO1 rollback mask based on one or both RW image
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* headers.
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*/
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void system_update_rollback_mask_with_active_img(void);
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void system_update_rollback_mask_with_both_imgs(void);
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/**
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* Scan INFO1 rollback map and infomap fields of both RW and RW_B image
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* headers, and return a string showing how many zeros are there at the base
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* of in each of these objects.
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*
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* The passed in parameters are the memory area to put the string in and the
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* size of this memory area.
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*/
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void system_get_rollback_bits(char *value, size_t value_size);
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/**
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* Set the rollback counter to a value which would ensure a rollback on the
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* next boot.
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*/
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void system_ensure_rollback(void);
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/**
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* Enables holding external pins across soft chip resets. Application firmware
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* is responsible for disengaging pinhold upon reset.
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*/
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void system_pinhold_on_reset_enable(void);
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/**
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* Disables holding external pins across soft chip resets.
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*/
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void system_pinhold_on_reset_disable(void);
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/**
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* Disengages pinhold if engaged.
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*/
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void system_pinhold_disengage(void);
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#endif /* __CROS_EC_SYSTEM_CHIP_H */
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