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Look at a bunch of Task code

This commit is contained in:
DBJ314 2018-04-29 18:39:50 -04:00 committed by Elliot Nunn
parent 3e05ffda22
commit f20a0216aa
2 changed files with 76 additions and 70 deletions
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6
NanoKernel/NKMPCalls.s
View File

@ -1610,12 +1610,12 @@ MPMarkPMFTask
mr. r8, r3
lwz r31, EWA.PA_CurTask(r30)
beq @use_blue_task_instead
beq @use_this_task_instead
bl LookupID
cmpwi r9, Task.kIDClass
mr r31, r8
bne ReleaseAndReturnMPCallInvalidIDErr
@use_blue_task_instead
@use_this_task_instead
; Insert bit 31 of r4 into bit 21 of these flags
lwz r17, Task.Flags(r31)
@ -2035,7 +2035,7 @@ MPCall_133 ; OUTSIDE REFERER
_Lock PSA.SchLock, scratch1=r16, scratch2=r17
cmpw r3, r0
lwz r16, 0x0edc(r1)
lwz r16, KDP.NanoKernelInfo + NKNanoKernelInfo.ConfigFlags(r1)
li r17, 0x0b
blt MPCall_133_0x34
and r3, r3, r17

140
NanoKernel/NKTasks.s
View File

@ -522,19 +522,22 @@ TasksFuncThatIsNotAMPCall
blr
; int MPIsTaskBlue(TaskID)
; Returns true if the Task ID is the same as the blue Task.
; If the Task ID sent is 0, it uses the calling Task's ID.
DeclareMPCall 11, MPCall_11
DeclareMPCall 11, MPIsTaskBlue
MPCall_11 ; OUTSIDE REFERER
MPIsTaskBlue ; OUTSIDE REFERER
mfsprg r16, 0
cmpwi r3, 0x00
lwz r17, PSA.PA_BlueTask(r1)
lwz r18, -0x0008(r16)
lwz r19, 0x0000(r17)
bne MPCall_11_0x1c
lwz r3, 0x0000(r18)
lwz r18, EWA.PA_CurTask(r16)
lwz r19, Task.ID(r17)
bne @ID_Provided
lwz r3, Task.ID(r18);if r3 is 0, use calling Task's ID
MPCall_11_0x1c
@ID_Provided
cmpw r3, r19
li r3, 0x01
beq CommonMPCallReturnPath
@ -542,21 +545,24 @@ MPCall_11_0x1c
b CommonMPCallReturnPath
; returns the ID and SomeLabelField of the blue Task.
; Needs a name. MPGetBlueTaskIDAndSomeLabelField() isn't good enough
DeclareMPCall 12, MPCall_12
MPCall_12 ; OUTSIDE REFERER
mfsprg r14, 0
lwz r15, -0x0008(r14)
lwz r3, 0x0000(r15)
lwz r4, 0x00ec(r15)
lwz r15, EWA.PA_CurTask(r14)
lwz r3, Task.ID(r15)
lwz r4, Task.SomeLabelField(r15)
b CommonMPCallReturnPath
; OSStatus MPSetTaskWeight(TaskID, weight)
; sets the weight of a Task. Recalculates scheduler stuff if needed.
; Name is just a guess. Change it if you find out what this is really called.
DeclareMPCall 14, MPSetTaskWeight
DeclareMPCall 14, MPCall_14
MPCall_14 ; OUTSIDE REFERER
MPSetTaskWeight ; OUTSIDE REFERER
cmpwi r4, 0x01
cmpwi cr1, r4, 10000
blt ReturnMPCallInvalidIDErr
@ -572,22 +578,22 @@ MPCall_14 ; OUTSIDE REFERER
bne ReleaseAndReturnMPCallInvalidIDErr
mr r31, r8
lbz r16, 0x0018(r31)
lbz r16, Task.State(r31)
cmpwi r16, 0x01
bne MPCall_14_0x70
lwz r16, 0x0008(r31)
lwz r17, 0x001c(r31)
lwz r18, 0x0014(r16)
subf r17, r17, r4
add r18, r17, r18
bne @Set_Weight;if task isn't running, you can change its weight freely
lwz r16, Task.QueueMember(r31)
lwz r17, Task.Weight(r31)
lwz r18, ReadyQueue.TotalWeight(r16)
subf r17, r17, r4 ;get the change in weight
add r18, r17, r18;add the change to ReadyQueue.TotalWeight
cmpwi r17, 0x00
stw r18, 0x0014(r16)
beq MPCall_14_0x70
stw r18, ReadyQueue.TotalWeight(r16)
beq @Set_Weight;don't mess with scheduler if weight is unchanged
mr r8, r31
bl FlagSchEval
MPCall_14_0x70
stw r4, 0x001c(r31)
@Set_Weight
stw r4, Task.Weight(r31)
; r1 = kdp
b ReleaseAndReturnZeroFromMPCall
@ -723,16 +729,15 @@ MPCall_58 ; OUTSIDE REFERER
lwz r29, Task.Flags(r31)
mtcr r29
li r3, kMPTaskAbortedErr
bc BO_IF, 30, ReleaseAndReturnMPCall
bc BO_IF, Task.kFlagAborted, ReleaseAndReturnMPCall
bc BO_IF, 18, MPCall_58_0x44
bc BO_IF_NOT, 22, ReleaseAndReturnMPCallOOM
bc BO_IF, Task.kFlagPageFaulted, MPCall_58_0x44
bc BO_IF_NOT, Task.kFlagStopped, ReleaseAndReturnMPCallOOM
MPCall_58_0x44
mtcr r4
lwz r30, 0x0088(r31)
lwz r30, Task.ContextBlockPtr(r31)
bc BO_IF_NOT, 31, MPCall_58_0x68
li r8, 0x1c
bl PoolAlloc
@ -743,8 +748,8 @@ MPCall_58_0x44
MPCall_58_0x68
li r17, 0x3800
rlwinm. r8, r29, 0, 18, 18
andc r29, r29, r17
rlwinm. r8, r29, 0, 18, 18;Task.kFlagPageFaulted, but empw complains when I call it that
andc r29, r29, r17 ;clear Task.kFlagPageFaulted, Task.kFlag19, and Task.kFlag20
li r17, 0x00
bne cr7, MPCall_58_0x80
ori r17, r17, 0x400
@ -754,8 +759,8 @@ MPCall_58_0x80
ori r17, r17, 0x200
MPCall_58_0x88
lwz r18, 0x00a4(r30)
rlwimi r18, r17, 0, 21, 22
lwz r18, ContextBlock.MSR(r30)
rlwimi r18, r17, 0, MSR_SEbit, MSR_BEbit
stw r18, 0x00a4(r30)
li r19, 0x600
lwz r17, 0x0008(r31)
@ -913,13 +918,13 @@ MPCall_60 ; OUTSIDE REFERER
mtcr r16
li r3, kMPTaskAbortedErr
bc BO_IF, 30, ReleaseAndReturnMPCall
bc BO_IF, Task.kFlagAborted, ReleaseAndReturnMPCall
bc BO_IF, 18, MPCall_60_0x4c
bc BO_IF_NOT, 22, ReleaseAndReturnMPCallOOM
bc BO_IF, Task.kFlagPageFaulted, MPCall_60_0x4c
bc BO_IF_NOT, Task.kFlagStopped, ReleaseAndReturnMPCallOOM
MPCall_60_0x4c
lbz r16, 0x0018(r31)
lbz r16, Task.State(r31)
cmpwi r16, 0x00
bne ReleaseAndReturnMPCallOOM
cmpwi r4, 0x00
@ -932,11 +937,11 @@ MPCall_60_0x4c
beq cr1, MPCall_60_0x1c0
cmpwi r4, 0x04
bne ReleaseAndReturnMPCallOOM
lwz r16, 0x0088(r31)
lwz r16, Task.ContextBlockPtr(r31)
li r17, 0x00
cmplwi r5, 0x00
cmplwi cr1, r5, 0x04
beq MPCall_60_0xac
beq MPCall_60_0xac;gets ID of Area SRR0 is in
beq cr1, MPCall_60_0xc0
cmplwi r5, 0x08
cmplwi cr1, r5, 0x0c
@ -945,41 +950,41 @@ MPCall_60_0x4c
b ReleaseAndReturnMPCallOOM
MPCall_60_0xac
lwz r8, 0x0070(r31)
lwz r9, 0x0074(r16)
lwz r8, Task.AddressSpacePtr(r31)
lwz r9, ContextBlock.SRR0(r16)
bl FindAreaAbove
lwz r17, 0x0000(r8)
lwz r17, Area.ID(r8)
b MPCall_60_0x36c
MPCall_60_0xc0
lwz r17, 0x0074(r16)
lwz r17, ContextBlock.SRR0(r16)
b MPCall_60_0x36c
MPCall_60_0xc8
lwz r17, 0x00f8(r31)
lwz r17, Task.ErrToReturnIfIDie(r31)
b MPCall_60_0x36c
MPCall_60_0xd0
lwz r17, 0x0040(r16)
lwz r18, 0x0064(r16)
rlwinm. r8, r17, 0, 27, 27
lwz r17, ContextBlock.SavedFlags(r16)
lwz r18, 0x0064(r16);some unknown ContextBlock value
rlwinm. r8, r17, 0, EWA.kFlagLowSaves, EWA.kFlagLowSaves
li r17, 0x02
beq MPCall_60_0x36c
rlwinm. r8, r18, 0, 1, 1
rlwinm. r8, r18, 0, EWA.kFlag1, EWA.kFlag1
li r17, 0x01
bne MPCall_60_0x36c
li r17, 0x00
b MPCall_60_0x36c
MPCall_60_0xf8
lwz r16, 0x0088(r31)
lwz r16, Task.ContextBlockPtr(r31)
cmplwi cr1, r5, 0xf8
andi. r17, r5, 0x07
addi r16, r16, 0xfc
b MPCall_60_0x124
MPCall_60_0x10c
lwz r16, 0x0088(r31)
lwz r16, Task.ContextBlockPtr(r31)
cmplwi r5, 0x100
cmplwi cr1, r5, 0xf8
beq MPCall_60_0x144
@ -1440,16 +1445,17 @@ MPCall_63 ; OUTSIDE REFERER
cmpwi r9, Task.kIDClass
bne ReleaseAndReturnMPCallInvalidIDErr
stw r4, 0x00ec(r8)
stw r4, Task.SomeLabelField(r8)
; r1 = kdp
b ReleaseAndReturnZeroFromMPCall
; OSStatus MPSetTaskCPU(TaskID, CPUID)
; Makes it so that a Task can only run on a single CPU.
DeclareMPCall 114, MPSetTaskCPU
DeclareMPCall 114, MPCall_114
MPCall_114 ; OUTSIDE REFERER
MPSetTaskCPU ; OUTSIDE REFERER
_Lock PSA.SchLock, scratch1=r16, scratch2=r17
@ -1469,28 +1475,28 @@ MPCall_114 ; OUTSIDE REFERER
mr r30, r8
bne ReleaseAndReturnMPCallInvalidIDErr
lwz r16, 0x0064(r31)
lwz r17, 0x00e8(r31)
rlwinm. r8, r16, 0, 30, 30
lwz r16, Task.Flags(r31)
lwz r17, Task.PreemptCtr(r31)
rlwinm. r8, r16, 0, Task.kFlagAborted, Task.kFlagAborted
cmplw cr1, r17, r5
lwz r18, 0x0018(r30)
lwz r18, CPU.Flags(r30)
bne ReleaseAndReturnMPCallOOM
bne cr1, ReleaseAndReturnMPCallOOM
rlwinm. r8, r18, 0, 28, 28
rlwinm. r8, r18, 0, CPU.kFlagScheduled, CPU.kFlagScheduled
cmplwi cr1, r17, 0x04
beq ReleaseAndReturnMPCallOOM
lwz r16, 0x0064(r31)
lwz r16, Task.Flags(r31)
lhz r17, CPU.EWA + EWA.CPUIndex(r30)
ori r16, r16, 0x40
stw r16, 0x0064(r31)
sth r17, 0x001a(r31)
rlwinm. r8, r16, 0, 26, 26
ori r16, r16, 0x40;Task.kFlag25
stw r16, Task.Flags(r31)
sth r17, Task.CPUIndex(r31)
rlwinm. r8, r16, 0, Task.kFlag26, Task.kFlag26
mr r8, r31
bne MPCall_114_0x90
bne @No_Requeueing
bl SchTaskUnrdy
bl SchRdyTaskNow
MPCall_114_0x90
@No_Requeueing
bl FlagSchEvaluationIfTaskRequires
; r1 = kdp