forked from Mirrors/opensbi
33ba4e0567
Distinguish between functions which modify the devicetree and those which only extract information from it. Other than the iterators in fdt_domain.c, this is a mechanical conversion. Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org>
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* fdt_pmu.c - Flat Device Tree PMU helper routines
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*
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* Copyright (c) 2021 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Atish Patra <atish.patra@wdc.com>
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*/
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#ifndef __FDT_PMU_H__
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#define __FDT_PMU_H__
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#include <sbi/sbi_types.h>
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struct fdt_pmu_hw_event_select_map {
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uint32_t eidx;
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uint64_t select;
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};
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struct fdt_pmu_hw_event_counter_map {
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uint32_t eidx_start;
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uint32_t eidx_end;
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uint32_t ctr_map;
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};
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struct fdt_pmu_raw_event_counter_map {
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uint64_t select;
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uint64_t select_mask;
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uint32_t ctr_map;
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};
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#ifdef CONFIG_FDT_PMU
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/**
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* Fix up the PMU node in the device tree
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*
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* This routine:
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* 1. Disables opensbi specific properties from the DT
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*
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* It is recommended that platform support call this function in
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* their final_init() platform operation.
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*
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* @param fdt device tree blob
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*/
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int fdt_pmu_fixup(void *fdt);
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/**
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* Setup PMU data from device tree
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*
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* @param fdt device tree blob
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*
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* @return 0 on success and negative error code on failure
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*/
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int fdt_pmu_setup(const void *fdt);
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/**
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* Get the mhpmevent select value read from DT for a given event
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* @param event_idx Event ID of the given event
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*
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* @return The select value read from DT or 0 if given index was not found
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*/
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uint64_t fdt_pmu_get_select_value(uint32_t event_idx);
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/** The event index to selector value table instance */
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extern struct fdt_pmu_hw_event_select_map fdt_pmu_evt_select[];
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/** The number of valid entries in fdt_pmu_evt_select[] */
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extern uint32_t hw_event_count;
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#else
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static inline void fdt_pmu_fixup(void *fdt) { }
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static inline int fdt_pmu_setup(const void *fdt) { return 0; }
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static inline uint64_t fdt_pmu_get_select_value(uint32_t event_idx) { return 0; }
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#endif
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#endif
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