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#ifndef RESET_H
#define RESET_H
/*
* Generic board reset function. Call from common code that
* wants to trigger a reset.
*/
__noreturn void board_reset(void);
/*
* SoC or board specific implementation of the board reset.
*
* Implementations shall meet the following criteria:
*
* o For vboot support, the TPM MUST be reset.
*
* o All SoC/chipset blocks SHOULD be reset except for those
* that are intentionally meant to survive reset (e.g. tomb-
* stone registers and that sort of stuff).
*
* o All external SoC pins SHOULD return to power-on reset values.
*
* o The CPU MUST resume execution from power-on reset vector
* (same as cold boot).
*
* o Other board components (e.g. PCI, SDIO and stuff) SHOULD
* be reset.
*
* o USB SHOULD be power-cycled.
*
* o Board components that are intended to be fully independent
* from SoC (e.g. EC and EC-attached devices, the Cr50 on
* Chromebooks) SHOULD NOT be reset.
*
* General recommendations:
*
* o DRAM SHOULD NOT lose power if possible.
*
* o Reset time SHOULD be minimized
*/
void do_board_reset(void);
/* Super-hard reset specific to some Intel SoCs. */
__noreturn void global_reset(void);
/* Full board reset. Resets SoC and most/all board components (e.g. DRAM). */
__noreturn void hard_reset(void);
/* Board reset. Resets SoC some board components (e.g. TPM but not DRAM). */
__noreturn void soft_reset(void);
/* Reset implementations. Implement these in SoC or mainboard code. Implement
at least hard_reset() if possible, others fall back to it if necessary. */
void do_global_reset(void);
void do_hard_reset(void);
void do_soft_reset(void);
enum reset_type { /* listed in order of softness */
GLOBAL_RESET,
HARD_RESET,
SOFT_RESET,
};
/* Callback that an SoC may override to perform special actions before reset.
Take into account that softer resets may fall back to harder resets if not
implemented... this will *not* trigger another callback! */
void soc_reset_prepare(enum reset_type reset_type);
#endif
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