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Snitch Cluster peripherals

This section documents the registers exposed by the Snitch cluster to interface with various cluster-level peripherals, including the performance counters.

snitch_cluster_peripheral_reg address map

  • Absolute Address: 0x0
  • Base Offset: 0x0
  • Size: 0x1C0
Offset Identifier Name
0x000 perf_regs
0x180 scratch[0]
0x188 scratch[1]
0x190 scratch[2]
0x198 scratch[3]
0x1A0 cl_clint_set
0x1A8 cl_clint_clear
0x1B0 icache_prefetch_enable
0x1B8 unused

perf_regs register file

  • Absolute Address: 0x0
  • Base Offset: 0x0
  • Size: 0x180
Offset Identifier Name
0x000 perf_cnt_en[0]
0x008 perf_cnt_en[1]
0x010 perf_cnt_en[2]
0x018 perf_cnt_en[3]
0x020 perf_cnt_en[4]
0x028 perf_cnt_en[5]
0x030 perf_cnt_en[6]
0x038 perf_cnt_en[7]
0x040 perf_cnt_en[8]
0x048 perf_cnt_en[9]
0x050 perf_cnt_en[10]
0x058 perf_cnt_en[11]
0x060 perf_cnt_en[12]
0x068 perf_cnt_en[13]
0x070 perf_cnt_en[14]
0x078 perf_cnt_en[15]
0x080 perf_cnt_sel[0]
0x088 perf_cnt_sel[1]
0x090 perf_cnt_sel[2]
0x098 perf_cnt_sel[3]
0x0A0 perf_cnt_sel[4]
0x0A8 perf_cnt_sel[5]
0x0B0 perf_cnt_sel[6]
0x0B8 perf_cnt_sel[7]
0x0C0 perf_cnt_sel[8]
0x0C8 perf_cnt_sel[9]
0x0D0 perf_cnt_sel[10]
0x0D8 perf_cnt_sel[11]
0x0E0 perf_cnt_sel[12]
0x0E8 perf_cnt_sel[13]
0x0F0 perf_cnt_sel[14]
0x0F8 perf_cnt_sel[15]
0x100 perf_cnt[0]
0x108 perf_cnt[1]
0x110 perf_cnt[2]
0x118 perf_cnt[3]
0x120 perf_cnt[4]
0x128 perf_cnt[5]
0x130 perf_cnt[6]
0x138 perf_cnt[7]
0x140 perf_cnt[8]
0x148 perf_cnt[9]
0x150 perf_cnt[10]
0x158 perf_cnt[11]
0x160 perf_cnt[12]
0x168 perf_cnt[13]
0x170 perf_cnt[14]
0x178 perf_cnt[15]

perf_cnt_en register

  • Absolute Address: 0x0
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x8
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x10
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x18
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x20
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x28
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x30
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x38
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x40
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x48
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x50
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x58
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x60
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x68
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x70
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_en register

  • Absolute Address: 0x78
  • Base Offset: 0x0
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80
Bits Identifier Access Reset Name
0 enable rw 0x1 enable

enable field

Enable a particular performance counter to start tracking.

perf_cnt_sel register

  • Absolute Address: 0x80
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0x88
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0x90
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0x98
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xA0
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xA8
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xB0
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xB8
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xC0
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xC8
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xD0
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xD8
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xE0
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xE8
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xF0
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt_sel register

  • Absolute Address: 0xF8
  • Base Offset: 0x80
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Select the metric that is tracked for each performance counter.

Bits Identifier Access Reset Name
15:0 hart rw hart
31:16 metric rw metric

hart field

Select from which hart in the cluster, starting from 0, the event should be counted. For each performance counter the cores can be selected individually. If a hart greater than the cluster's total hart size is selected the selection will wrap and the hart corresponding to hart_select % total_harts_in_cluster will be selected.

metric field

Select the metric that is tracked for each performance counter

perf_cnt register

  • Absolute Address: 0x100
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x108
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x110
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x118
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x120
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x128
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x130
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x138
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x140
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x148
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x150
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x158
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x160
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x168
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x170
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

perf_cnt register

  • Absolute Address: 0x178
  • Base Offset: 0x100
  • Size: 0x8
  • Array Dimensions: [16]
  • Array Stride: 0x8
  • Total Size: 0x80

Performance counter. Set corresponding perf_cnt_sel register depending on what performance metric and hart you would like to track.

Bits Identifier Access Reset Name
47:0 perf_counter rw, wclr

perf_counter field

Performance counter

scratch register

  • Absolute Address: 0x180
  • Base Offset: 0x180
  • Size: 0x8
  • Array Dimensions: [4]
  • Array Stride: 0x8
  • Total Size: 0x20

Scratch registers. Used in the bootrom for various purposes.

Bits Identifier Access Reset Name
31:0 scratch rw 0x0

scratch field

Scratch register

scratch register

  • Absolute Address: 0x188
  • Base Offset: 0x180
  • Size: 0x8
  • Array Dimensions: [4]
  • Array Stride: 0x8
  • Total Size: 0x20

Scratch registers. Used in the bootrom for various purposes.

Bits Identifier Access Reset Name
31:0 scratch rw 0x0

scratch field

Scratch register

scratch register

  • Absolute Address: 0x190
  • Base Offset: 0x180
  • Size: 0x8
  • Array Dimensions: [4]
  • Array Stride: 0x8
  • Total Size: 0x20

Scratch registers. Used in the bootrom for various purposes.

Bits Identifier Access Reset Name
31:0 scratch rw 0x0

scratch field

Scratch register

scratch register

  • Absolute Address: 0x198
  • Base Offset: 0x180
  • Size: 0x8
  • Array Dimensions: [4]
  • Array Stride: 0x8
  • Total Size: 0x20

Scratch registers. Used in the bootrom for various purposes.

Bits Identifier Access Reset Name
31:0 scratch rw 0x0

scratch field

Scratch register

cl_clint_set register

  • Absolute Address: 0x1A0
  • Base Offset: 0x1A0
  • Size: 0x8

Set bits in the cluster-local CLINT. Writing a 1 at location i sets the cluster-local interrupt of hart i, where i is relative to the first hart in the cluster, ignoring the cluster base hart ID.

Bits Identifier Access Reset Name
31:0 cl_clint_set w

cl_clint_set field

Set cluster-local interrupt of hart i

cl_clint_clear register

  • Absolute Address: 0x1A8
  • Base Offset: 0x1A8
  • Size: 0x8

Clear bits in the cluster-local CLINT. Writing a 1 at location i clears the cluster-local interrupt of hart i, where i is relative to the first hart in the cluster, ignoring the cluster base hart ID.

Bits Identifier Access Reset Name
31:0 cl_clint_clear w

cl_clint_clear field

Set cluster-local interrupt of hart i

icache_prefetch_enable register

  • Absolute Address: 0x1B0
  • Base Offset: 0x1B0
  • Size: 0x8

Controls prefetching of the instruction cache.

Bits Identifier Access Reset Name
0 icache_prefetch_enable w 0x1

icache_prefetch_enable field

Enable instruction prefetching.

unused register

  • Absolute Address: 0x1B8
  • Base Offset: 0x1B8
  • Size: 0x8

Unused register added to print enum

Bits Identifier Access Reset Name
4:0 f r 0x0