forked from Mirrors/opensbi
0308f93dc4
To allow platform override pmu_init() filling the translation table fdt_pmu_evt_select[] when PMU node doesn't provide such information, we need to share the table and its entry counter with other .c file. We also define the structures of PMU property in fdt_helper.h, so we can initialize the mappings in arrays. Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com> Reviewed-by: Atish Patra <atishp@rivosinc.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(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(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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