mirror of
https://github.com/elliotnunn/powermac-rom.git
synced 2024-12-01 09:50:31 +00:00
299 lines
5.2 KiB
ArmAsm
299 lines
5.2 KiB
ArmAsm
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;_______________________________________________________________________
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; NanoKernel Opaque ID Index
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;
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; Creates opaque structure IDs and stores them in the Pool. An opaque
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; ID maps back to the (type, pointer) pair passed to MakeID.
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;
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; This abstraction is very important to the Multiprocessing Services.
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;
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; Rene on comp.sys.mac.programmer.help, 26 Oct 01:
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;
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; Total opaque IDs - The number of IDs currently in use. All MP
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; objects: address spaces, areas, processors, memory coherence groups,
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; queues, semaphores, critical regions, event groups, timers,
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; notifications, etc. are assigned an ID when created, and they are
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; accessed by way of this ID. The kernel presently handles 65,000
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; simultaneous IDs with a bit pattern reuse probability of 1 in 4
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; billion.
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;_______________________________________________________________________
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Local_Panic set *
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b panic
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; ARG KDP *r1
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InitIDIndex
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mflr r23
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li r8, Index.Size
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bl PoolAlloc
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mr. r22, r8
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stw r8, PSA.IndexPtr(r1)
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beq+ Local_Panic
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li r9, 0
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stw r9, KDP.NanoKernelInfo + NKNanoKernelInfo.IDCtr(r1)
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sth r9, Index.HalfOne(r22)
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sth r9, Index.HalfTwo(r22)
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lisori r9, Index.kSignature
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stw r9, Index.Signature(r22)
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; Then what the hell is this?
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li r8, 0xfd8
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bl PoolAlloc
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cmpwi r8, 0
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stw r8, Index.IDsPtr(r22)
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beq+ Local_Panic
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mtlr r23
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li r9, 0x00
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sth r9, 0x0000(r8)
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li r9, 0x1fa
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sth r9, 0x0002(r8)
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lisori r9, 'IDs '
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stw r9, 0x0004(r8)
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blr
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; ARG void *r8, IDClass r9
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; RET ID r8
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MakeID
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lwz r18, -0x0a98(r1)
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lhz r19, 0x0000(r18)
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mr r21, r19
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@_c
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lwz r18, -0x0a98(r1)
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rlwinm r20, r19, 25, 23, 29
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addi r20, r20, 0x08
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clrlwi. r19, r19, 0x17
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lwzx r18, r18, r20
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slwi r22, r19, 3
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addi r20, r18, 0x08
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cmpwi r18, 0x00
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add r22, r22, r20
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bne- @_48
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li r19, 0x00
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b @_c
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@_3c
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add r20, r20, r19
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cmpw r20, r21
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beq- @_70
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@_48
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lbz r23, 0x0000(r22)
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cmpwi r23, 0x00
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beq- @_f0
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addi r19, r19, 0x01
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cmpwi cr1, r19, 0x1fa
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addi r22, r22, 0x08
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lhz r20, 0x0000(r18)
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blt+ cr1, @_3c
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addi r19, r20, 0x200
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b @_c
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@_70
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lwz r18, -0x0a98(r1)
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mr r21, r8
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lhz r19, 0x0002(r18)
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mr r22, r9
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addi r19, r19, 0x200
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rlwinm. r20, r19, 25, 23, 29
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li r8, 0x00
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beqlr-
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mflr r23
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li r8, 0xfd8
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; r1 = kdp
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; r8 = size
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bl PoolAlloc
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; r8 = ptr
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mr. r18, r8
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mtlr r23
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li r8, 0x00
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beqlr-
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lwz r17, -0x0a98(r1)
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lhz r19, 0x0002(r17)
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addi r19, r19, 0x200
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rlwinm r20, r19, 25, 23, 29
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addi r20, r20, 0x08
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sth r19, 0x0002(r17)
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stwx r18, r20, r17
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sth r19, 0x0000(r18)
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li r9, 0x1fa
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sth r9, 0x0002(r18)
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lis r9, 0x4944
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ori r9, r9, 0x7320
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stw r9, 0x0004(r18)
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li r19, 0x00
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mr r8, r21
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mr r9, r22
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addi r22, r18, 0x08
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@_f0
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stw r8, 0x0004(r22)
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stb r9, 0x0000(r22)
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lwz r9, KDP.NanoKernelInfo + NKNanoKernelInfo.IDCtr(r1)
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addi r9, r9, 0x01
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stw r9, KDP.NanoKernelInfo + NKNanoKernelInfo.IDCtr(r1)
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lhz r20, 0x0000(r18)
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lhz r8, 0x0002(r22)
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lwz r21, -0x0a98(r1)
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add r19, r19, r20
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addi r8, r8, 0x01
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lhz r20, 0x0002(r18)
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sth r8, 0x0002(r22)
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addi r20, r20, -0x01
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rlwimi. r8, r19, 16, 0, 15
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sth r20, 0x0002(r18)
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sth r19, 0x0000(r21)
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bnelr+
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lhz r8, 0x0002(r22)
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addi r8, r8, 0x01
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sth r8, 0x0002(r22)
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rlwimi r8, r19, 16, 0, 15
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blr
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; ARG ID r8
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align 5
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DeleteID
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rlwinm r20, r8, 9, 23, 29
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lwz r18, -0x0a98(r1)
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addi r20, r20, 0x08
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rlwinm. r19, r8, 16, 23, 31
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lwzx r18, r18, r20
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cmplwi cr1, r19, 0x1fa
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cmpwi r18, 0x00
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addi r20, r18, 0x08
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slwi r22, r19, 3
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add r22, r22, r20
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clrlwi r20, r8, 0x10
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li r8, 0x00
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bgelr- cr1
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beqlr-
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lbz r19, 0x0000(r22)
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lhz r23, 0x0002(r22)
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cmpwi r19, 0x00
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cmpw cr1, r23, r20
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beqlr-
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bnelr- cr1
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lwz r9, KDP.NanoKernelInfo + NKNanoKernelInfo.IDCtr(r1)
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addi r9, r9, -0x01
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stw r9, KDP.NanoKernelInfo + NKNanoKernelInfo.IDCtr(r1)
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lhz r20, 0x0002(r18)
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stb r8, 0x0000(r22)
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addi r20, r20, 0x01
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li r8, 0x01
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sth r20, 0x0002(r18)
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blr
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; ARG ID r8
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; RET Ptr r8, IDClass r9
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align 5
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LookupID
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rlwinm r20, r8, 9, 23, 29
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lwz r18, -0x0a98(r1)
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addi r20, r20, 0x08
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rlwinm. r19, r8, 16, 23, 31
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lwzx r18, r18, r20
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cmplwi cr1, r19, 0x1fa
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cmpwi r18, 0x00
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addi r20, r18, 0x08
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slwi r22, r19, 3
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add r22, r22, r20
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clrlwi r20, r8, 0x10
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li r8, 0x00
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li r9, 0x00
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bgelr- cr1
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beqlr-
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lbz r19, 0x0000(r22)
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lhz r23, 0x0002(r22)
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cmpwi r19, 0x00
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cmpw cr1, r23, r20
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beqlr-
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bnelr- cr1
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lwz r8, 0x0004(r22)
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mr r9, r19
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blr
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; ARG ID r8, IDClass r9
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; RET ID r8
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align 5
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GetNextIDOfClass
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rlwinm r20, r8, 9, 23, 29
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lwz r18, -0x0a98(r1)
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addi r20, r20, 0x08
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rlwinm. r19, r8, 16, 23, 31
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lwzx r18, r18, r20
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cmplwi cr1, r19, 0x1fa
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cmpwi r18, 0x00
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cmpwi cr2, r8, 0x00
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addi r20, r18, 0x08
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slwi r22, r19, 3
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li r8, 0x00
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bgelr- cr1
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beqlr-
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add r22, r22, r20
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bne- cr2, @_48
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@_3c
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lbz r23, 0x0000(r22)
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cmpwi r23, 0x00
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bne- @_8c
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@_48
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addi r19, r19, 0x01
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cmpwi r19, 0x1fa
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addi r22, r22, 0x08
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blt+ @_3c
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lhz r20, 0x0000(r18)
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addi r20, r20, 0x200
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rlwinm. r20, r20, 25, 23, 29
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lwz r18, -0x0a98(r1)
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beqlr-
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addi r20, r20, 0x08
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li r19, 0x00
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lwzx r18, r18, r20
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cmpwi r18, 0x00
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addi r22, r18, 0x08
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bne+ @_3c
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li r8, 0x00
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blr
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@_8c
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cmpwi r9, 0x00
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cmpw cr1, r9, r23
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beq- @_9c
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bne+ cr1, @_48
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@_9c
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lhz r20, 0x0000(r18)
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lhz r8, 0x0002(r22)
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add r19, r19, r20
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rlwimi r8, r19, 16, 0, 15
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blr
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