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// SPDX-License-Identifier: BSD-2-Clause
/*
* fdt_pmu.c - Flat Device Tree PMU helper routines
*
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
*
* Authors:
* Atish Patra <atish.patra@wdc.com>
*/
#ifndef __FDT_PMU_H__
#define __FDT_PMU_H__
#include <sbi/sbi_types.h>
struct fdt_pmu_hw_event_select_map {
uint32_t eidx;
uint64_t select;
};
struct fdt_pmu_hw_event_counter_map {
uint32_t eidx_start;
uint32_t eidx_end;
uint32_t ctr_map;
};
struct fdt_pmu_raw_event_counter_map {
uint64_t select;
uint64_t select_mask;
uint32_t ctr_map;
};
#ifdef CONFIG_FDT_PMU
/**
* Fix up the PMU node in the device tree
*
* This routine:
* 1. Disables opensbi specific properties from the DT
*
* It is recommended that platform support call this function in
* their final_init() platform operation.
*
* @param fdt device tree blob
*/
int fdt_pmu_fixup(void *fdt);
/**
* Setup PMU data from device tree
*
* @param fdt device tree blob
*
* @return 0 on success and negative error code on failure
*/
int fdt_pmu_setup(const void *fdt);
/**
* Get the mhpmevent select value read from DT for a given event
* @param event_idx Event ID of the given event
*
* @return The select value read from DT or 0 if given index was not found
*/
uint64_t fdt_pmu_get_select_value(uint32_t event_idx);
#else
static inline void fdt_pmu_fixup(void *fdt) { }
static inline int fdt_pmu_setup(const void *fdt) { return 0; }
static inline uint64_t fdt_pmu_get_select_value(uint32_t event_idx) { return 0; }
#endif
#endif
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