48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
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#ifndef __SLW_H
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#define __SLW_H
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#include <stdint.h>
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#include <stdbool.h>
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#include <ccan/short_types/short_types.h>
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/* Define device-tree fields */
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#define MAX_NAME_LEN 16
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struct cpu_idle_states {
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char name[MAX_NAME_LEN];
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u32 latency_ns;
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u32 residency_ns;
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/*
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* Register value/mask used to select different idle states.
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* PMICR in POWER8 and PSSCR in POWER9
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*/
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u64 pm_ctrl_reg_val;
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u64 pm_ctrl_reg_mask;
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u32 flags;
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};
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/* Track failure in Wakup engine */
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enum wakeup_engine_states {
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WAKEUP_ENGINE_NOT_PRESENT,
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WAKEUP_ENGINE_PRESENT,
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WAKEUP_ENGINE_FAILED
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};
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extern enum wakeup_engine_states wakeup_engine_state;
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extern bool has_deep_states;
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/* Patch SPR in SLW image */
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extern int64_t opal_slw_set_reg(uint64_t cpu_pir, uint64_t sprn, uint64_t val);
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extern void slw_init(void);
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/* P8 specific */
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struct cpu_thread;
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struct proc_chip;
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extern int64_t opal_slw_set_reg_p8(struct cpu_thread *c, struct proc_chip *chip,
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uint64_t sprn, uint64_t val);
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extern void slw_p8_init(void);
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extern void find_cpu_idle_state_properties_p8(struct cpu_idle_states **states, int *nr_states, bool *can_sleep);
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#endif /* __SKIBOOT_H */
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