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69 lines
4.9 KiB
Typst
69 lines
4.9 KiB
Typst
#import "../style.typ": *
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#import "../ip-reference.typ": ip-reference
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#import "../diagram-packages.typ": apu-instruction-diagram, apu-family-figures
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#import "../sections/apu-release.typ": apu-release-reference
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#pagebreak(weak:true)
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#context metadata((kind:"ip-start",id:"apu",page:here().page()))
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==== Audio Processing Unit (APU, partial) <apu>
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#change-start("v05-refresh-apu-chapter","Current codec availability and ordered APU acceptance")
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#ip("apu")
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#ip-reference("apu","apu",4,functional-note:[
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#let implementation=data.system_reference.apu_implementation
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#minor-title("Checked-in codec image and compatibility")
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#ds-table("apu-image-capacity",[Current checked-in P5 codec image: static assembly result],
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([Item],[Value],[Interpretation]),
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(([Control-store instructions],[#implementation.instruction_words / #implementation.maximum_instruction_words words],[#implementation.free_instruction_words words remain in the implemented V2 store.]),
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([Serialized image],[#implementation.bundle_bytes bytes],[Includes the header, entries, instructions and coefficient tables.]),
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([Coefficient/table payload],[#implementation.table_bytes bytes],[Separate from instruction-word capacity.]),
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([Entry roles],[WAV; reserved MP3 trap; FLAC],[*MP3 is not a decoder implementation*.]),
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([Qualification],[*Static assembly only*],[A valid image and capability bits do not establish corpus accuracy, sustained playback or physical signoff.])),
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widths:(1.1fr,0.85fr,2.05fr))
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APUMC V1 retains 2048-word limits and 11-bit control-flow PCs; V2 uses 4096-word limits and
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12-bit PCs. Both retain the common 64-bit instruction fields, seven classes and 62 defined
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opcodes. The 64-byte header, 32-byte entry records and 128-byte job descriptor remain distinct
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formats. New P5 images use V2; an unchanged legacy alias is not the current store capacity.
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#source-note("scripts/build_apu_p5_bundle.py",title:"Deterministic image assembly and high-water report")
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#source-note("rtl/ip/multimedia/apu_p5_codecs.apus",title:"Checked-in WAV/FLAC parser code and reserved MP3 trap")
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#minor-title("KWS implementation and default gate")
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The P7 model loader, MFCC/DS-CNN engine, SRAM client and lifecycle APIs are implemented.
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Default PRODUCT uses #code("EnableP7=0") and does not advertise capability bit 6. KWS discovery
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therefore returns #code("RS_ENOTSUP"); MODEL_LOAD, KWS_ENABLE, RX route 1 and
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#code("KWS_INPUT_CONFIG") at #code("0x23C") are subject to the same implementation gate.
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These registers are not an instruction to enable KWS in an ordinary product build.
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The fixed APUM model container is #implementation.kws_model_bytes bytes with a
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#(implementation.kws_header_bytes)-byte header, #implementation.kws_operators operator records,
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#implementation.kws_tensors tensor records and #implementation.kws_parameter_bytes parameter bytes.
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It is not a general TFLite interpreter or a qualified MLPerf result.
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The 112 KiB logical data map includes a 64 KiB KWS region; the codec/internal macro branch
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uses 12 four-KiB banks. The P9 KWS implementation adds 15 coefficient and 17 proof-memo
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macro wrappers; physical replacement remains subject to the exact synthesis evidence gate.
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#source-note("rtl/ip/multimedia/apb4_apu.sv",title:"Default P7 gate and implemented internal connections")
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#source-note("rtl/ip/multimedia/apu_kws_sram_client.sv",title:"Current KWS storage implementation")
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#source-note("scripts/apu_kws.py",title:"Fixed APUM model-container definitions")
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Full KWS qualification still requires the specified end-to-end PCM corpus, per-layer
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comparisons, sustained WAV/FLAC concurrency and lifecycle evidence. Conditional tests that
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do not execute without tools or local model data are not substitute pass reports.
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#apu-release-reference()
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#block(breakable:false)[
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#figure(apu-instruction-diagram(),kind:image,supplement:[Figure],caption:[APU 64-bit internal microcode fields and source-encoded examples.])<apu-instruction-layout>
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#source-note("scripts/apu_isa.py",title:"Instruction fields and encode/decode definitions")
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#source-note("rtl/ip/multimedia/apu_microcode_pkg.sv",title:"RTL instruction slices and legal-encoding checks")
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]
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#apu-family-figures()
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],legacy:[
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Default PRODUCT advertises capability word `0x000001BD`, while the P9 acceptance configuration advertises APB version `0x00010002`, capability `0x000003FD` and ABI digest `0x63E96066`. WAV/FLAC transport, job submission and stream paths are integrated; APUMC V1 images remain loadable, while new P5 release images use APUMC V2. MP3 remains unsupported; KWS and APUC loading are configuration-dependent. The checked-in P5 image can be assembled and fits the current control store. Complete corpus,
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sustained real-time and physical qualification require their own reports; they are not inferred from
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image availability. KWS implementation exists but EnableP7 defaults to false in PRODUCT.
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])
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#change-end("v05-refresh-apu-chapter")
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#context metadata((kind:"ip-end",id:"apu",page:here().page()))
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