<> <> <> <> DIRECTORY BasicTime USING [GMT], Disk USING [Channel, Command, defaultTries, DoIO, GetBootChainLink, Label, PageCount, PageNumber, Request, Status], DiskFace USING [DeviceHandle, DontCare, GetDeviceAttributes, GetNextDevice, nullDeviceHandle], FormatDisk, Rope USING [ROPE], VM USING [AddressForPageNumber, Allocate, Free, Interval, Pin, Unpin]; FormatDiskDLion: MONITOR -- only one guy in here at a time! IMPORTS Disk, DiskFace, VM EXPORTS FormatDisk = BEGIN OPEN FormatDisk; <> BadPage: PUBLIC SIGNAL [page: Disk.PageNumber, correctable: BOOLEAN] = CODE; Error: PUBLIC ERROR [page: Disk.PageNumber, status: Disk.Status] = CODE; Sweep: PUBLIC ENTRY PROC [channel: Disk.Channel, operation: Operation, firstPage: Disk.PageNumber, pageCount: Disk.PageCount, label: LONG POINTER TO Disk.Label, data: LONG POINTER] = BEGIN Transfer[channel: channel, firstPage: firstPage, pageCount: pageCount, command: commandTable[operation], label: label, data: data, reportSoftErrors: TRUE]; END; commandTable: ARRAY Operation OF Disk.Command = [ format: [write, write, write], write: [verify, write, write], read: [verify, read, read], verify: [verify, verify, verify]]; <> MicrocodeInstallFailure: PUBLIC SIGNAL [why: FailureType] = CODE; InstallInitialMicrocode: PUBLIC ENTRY PROC [channel: Disk.Channel, getPage: PROC [ptr: LONG POINTER] RETURNS [ok: BOOLEAN]] = BEGIN label: Disk.Label; vmInterval: VM.Interval _ VM.Allocate[count: 1]; pageBuffer: LONG POINTER _ VM.AddressForPageNumber[vmInterval.page]; thisPage: Disk.PageNumber _ hardUCodeStart; prevPage: Disk.PageNumber _ [hardUCodeStart-1]; VM.Pin[vmInterval]; BEGIN ENABLE UNWIND => {VM.Unpin[vmInterval]; VM.Free[vmInterval]}; DO ok: BOOLEAN; IF (ok _ getPage[pageBuffer]) THEN BEGIN ENABLE BadPage, Error => IF thisPage=hardUCodeStart THEN GOTO firstPageBad ELSE {thisPage _ [thisPage+1]; RETRY}; IF thisPage>=hardUCodeStart+hardUCodeSize THEN ERROR MicrocodeInstallFailure[microcodeTooBig]; label _ initialMicrocodeLabel; label.dontCare _ channel.GetBootChainLink[[thisPage+1]]; Transfer[channel: channel, firstPage: thisPage, pageCount: 1, command: [verify, write, write], label: @label, data: pageBuffer]; label _ initialMicrocodeLabel; Transfer[channel: channel, firstPage: thisPage, pageCount: 1, command: [verify, verify, verify], label: @label, data: pageBuffer]; END; IF thisPage#Disk.PageNumber[prevPage+1] OR ~ok THEN BEGIN ENABLE BadPage, Error => GOTO flakeyPageFound; label _ initialMicrocodeLabel; Transfer[channel: channel, firstPage: prevPage, pageCount: 1, command: [verify, verify, read], label: @label, data: pageBuffer]; label _ initialMicrocodeLabel; label.dontCare _ IF ok THEN channel.GetBootChainLink[thisPage] ELSE eofLink; Transfer[channel: channel, firstPage: prevPage, pageCount: 1, command: [verify, write, write], label: @label, data: pageBuffer]; END; IF ~ok THEN EXIT; thisPage _ [(prevPage _ thisPage)+1]; REPEAT firstPageBad => ERROR MicrocodeInstallFailure[firstPageBad]; flakeyPageFound => ERROR MicrocodeInstallFailure[flakeyPageFound]; ENDLOOP; END; VM.Unpin[vmInterval]; VM.Free[vmInterval]; END; IdentifyInitialMicrocode: PUBLIC ENTRY PROC [channel: Disk.Channel] RETURNS [microcodeInstalled: BOOLEAN, time: BasicTime.GMT, name: Rope.ROPE] = BEGIN microcodeInstalled _ FALSE; -- DLion microcode does not follow this convention END; hardUCodeFileID: ARRAY [0..5) OF CARDINAL = [0, 0, 0, 0, 0]; -- boot microcode knows this ID initialMicrocodeLabel: Disk.Label = [fileID: [abs[LOOPHOLE[hardUCodeFileID]]], filePage: 0, attributes: LOOPHOLE[0], dontCare: LOOPHOLE[LONG[0]]]; -- boot microcode knows this label. All pages of the initial microcode have the same label, except for the boot chain link which is filled in for every page. That is, the initial microcode is not a well-formed file. nullLink: DiskFace.DontCare = LOOPHOLE[LONG[0]]; eofLink: DiskFace.DontCare = LOOPHOLE[LONG[-1]]; <> hardUCodeStart: PUBLIC Disk.PageNumber; -- computed by Start hardUCodeSize: PUBLIC Disk.PageCount; -- computed by Start altoRegionJargon: PUBLIC Rope.ROPE _ NIL; altoRegionsMax: PUBLIC INT _ 0; altoRegionsStart: PUBLIC Disk.PageNumber _ [0]; altoRegionsSize: PUBLIC Disk.PageCount _ 0; altoRegionsBottomUp: PUBLIC BOOL _ FALSE; <> Start: PUBLIC PROC = BEGIN sectors, heads: CARDINAL; device: DiskFace.DeviceHandle = DiskFace.GetNextDevice[DiskFace.nullDeviceHandle]; IF device=DiskFace.nullDeviceHandle THEN ERROR; [sectorsPerTrack: sectors, movingHeads: heads] _ DiskFace.GetDeviceAttributes[device]; hardUCodeStart _ [sectors]; -- one track reserved before start of microcode hardUCodeSize _ (heads-1)*sectors; -- microcode fills rest of first cylinder END; <> Transfer: PROC [channel: Disk.Channel, firstPage: Disk.PageNumber, pageCount: Disk.PageCount, command: Disk.Command, label: LONG POINTER TO Disk.Label, data: LONG POINTER, reportSoftErrors: BOOLEAN _ FALSE] = <> BEGIN retrying: BOOLEAN _ FALSE; WHILE pageCount>0 DO <> request: Disk.Request _ [diskPage: firstPage, data: data, incrementDataPtr: FALSE, command: command, tries: IF reportSoftErrors AND ~retrying THEN 1 ELSE Disk.defaultTries, count: IF retrying THEN 1 ELSE pageCount]; countDone: Disk.PageCount; status: Disk.Status; [status: status, countDone: countDone] _ channel.DoIO[label: label, request: @request]; WITH s: status SELECT FROM changed => ERROR Error[firstPage, status]; unchanged => SELECT s.status FROM goodCompletion => IF retrying THEN {retrying _ FALSE; SIGNAL BadPage[firstPage, TRUE]}; notReady, recalibrateError, seekTimeout, memoryError, memoryFault, clientError, operationReset => ERROR Error[firstPage, status]; ENDCASE => BEGIN IF ~retrying THEN retrying _ TRUE ELSE BEGIN retrying _ FALSE; SIGNAL BadPage[firstPage, FALSE]; countDone _ countDone+1; -- skip over the bad page label.filePage _ label.filePage+1; END; END; ENDCASE => ERROR; pageCount _ pageCount-countDone; firstPage _ [firstPage+countDone]; ENDLOOP; END; END.