forked from Mirrors/opensbi
lib: sbi_pmu: Add custom PMU device operations
We extend SBI PMU implementation to allow custom PMU device operations which a platform can use for platform specific quirks. The custom PMU device operations added by this patch include: 1) Operations to allow a platform implement custom firmware events. These custom firmware events can be SBI vendor extension related events or platform specific per-HART events are not possible to count through HPM CSRs. 2) Operations to allow a platform implement custom way for enabling (or disabling) an overflow interrupt (e.g. T-Head C9xx). Signed-off-by: Anup Patel <apatel@ventanamicro.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Atish Patra <atishp@rivosinc.com>
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@@ -25,6 +25,63 @@
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#define SBI_PMU_CTR_MAX (SBI_PMU_HW_CTR_MAX + SBI_PMU_FW_CTR_MAX)
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#define SBI_PMU_FIXED_CTR_MASK 0x07
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struct sbi_pmu_device {
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/** Name of the PMU platform device */
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char name[32];
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/**
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* Validate event code of custom firmware event
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* Note: SBI_PMU_FW_MAX <= event_idx_code
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*/
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int (*fw_event_validate_code)(uint32_t event_idx_code);
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/**
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* Match custom firmware counter with custom firmware event
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* Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
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*/
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bool (*fw_counter_match_code)(uint32_t counter_index,
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uint32_t event_idx_code);
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/**
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* Read value of custom firmware counter
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* Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
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*/
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uint64_t (*fw_counter_read_value)(uint32_t counter_index);
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/**
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* Start custom firmware counter
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* Note: SBI_PMU_FW_MAX <= event_idx_code
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* Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
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*/
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int (*fw_counter_start)(uint32_t counter_index,
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uint32_t event_idx_code,
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uint64_t init_val, bool init_val_update);
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/**
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* Stop custom firmware counter
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* Note: 0 <= counter_index < SBI_PMU_FW_CTR_MAX
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*/
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int (*fw_counter_stop)(uint32_t counter_index);
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/**
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* Custom enable irq for hardware counter
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* Note: 0 <= counter_index < SBI_PMU_HW_CTR_MAX
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*/
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void (*hw_counter_enable_irq)(uint32_t counter_index);
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/**
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* Custom disable irq for hardware counter
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* Note: 0 <= counter_index < SBI_PMU_HW_CTR_MAX
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*/
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void (*hw_counter_disable_irq)(uint32_t counter_index);
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};
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/** Get the PMU platform device */
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const struct sbi_pmu_device *sbi_pmu_get_device(void);
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/** Set the PMU platform device */
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void sbi_pmu_set_device(const struct sbi_pmu_device *dev);
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/** Initialize PMU */
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int sbi_pmu_init(struct sbi_scratch *scratch, bool cold_boot);
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