mirror of
https://github.com/elliotnunn/powermac-rom.git
synced 2024-06-07 08:30:20 +00:00
exceptions round-trip
except for FDP offsets (which suck)
This commit is contained in:
Elliot Nunn
parent
d65818e89e
commit
bdc296adef
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@ -83,41 +83,59 @@ BootstrapVersion ds.b 16 ; f00:f10 ; Bootstrap loader version info, from Config
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; Lives in EDP. Keeping a separate record to EDP makes the code nicer.
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; Gets called the "system context"
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ContextBlock record 0,INCR
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; Move this!
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CB record 0,INCR
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Flags ds.l 1 ; 000 ; (SPAC) copied from kdp by CreateTask
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Enables ds.l 1 ; 004
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org 0x40
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SavedFlags ds.l 1 ; 040 ; from before exception
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org 0x44
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SavedEnables ds.l 1 ; 044 ; from before exception
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org 0x4c
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ds.l 1 ; 008
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ds.l 1 ; 00c
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ds.l 1 ; 010
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ds.l 1 ; 014
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ds.l 1 ; 018
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ds.l 1 ; 01c
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ds.l 1 ; 020
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LowSave17 ds.l 1 ; 024
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LowSave20 ds.l 1 ; 028
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LowSave21 ds.l 1 ; 02c
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ds.l 1 ; 030
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LowSave19 ds.l 1 ; 034
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ds.l 1 ; 038
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LowSave18 ds.l 1 ; 03c
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ExceptionOriginFlags ds.l 1 ; 040 ; from before exception
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ExceptionOriginEnables ds.l 1 ; 044 ; from before exception
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ds.l 1 ; 048
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ExceptionHandler ds.l 1 ; 04c
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org 0x5c
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LA_EmulatorKernelTrapTable ds.l 1
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org 0x74
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SRR0 ds.l 1 ; 074
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org 0x84
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LA_EmulatorEntry ds.l 1 ; 084 ; Entry pt of emulator; set by NK Init.s
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org 0x94
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LA_EmulatorData ds.l 1
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org 0x9c
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LA_DispatchTable ds.l 1
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org 0xa4
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ds.l 1 ; 050
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ExceptionHandlerR4 ds.l 1 ; 054
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ds.l 1 ; 058
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ExceptionHandlerRetAddr ds.l 1 ; 05c
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ds.l 1 ; 060
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PropagateR17 ds.l 1 ; 064
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PropagateR20 ds.l 1 ; 068
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PropagateR21 ds.l 1 ; 06c
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ds.l 1 ; 070
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PropagateR19 ds.l 1 ; 074
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ds.l 1 ; 078
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PropagateR18 ds.l 1 ; 07c
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ds.l 1 ; 080
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ExceptionOriginAddr ds.l 1 ; 084 ; Entry pt of emulator; set by NK Init.s
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ds.l 1 ; 088
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ExceptionOriginLR ds.l 1 ; 08c
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ds.l 1 ; 090
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ExceptionOriginR3 ds.l 1 ; 094
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ds.l 1 ; 098
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ExceptionOriginR4 ds.l 1 ; 09c
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ds.l 1 ; 0a0
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MSR ds.l 1 ; 0a4 ; (SPAC) copied from kdp by CreateTask
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org 0xc4
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ds.l 1 ; 0a8
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ds.l 1 ; 0ac
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ds.l 1 ; 0b0
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ds.l 1 ; 0b4
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ds.l 1 ; 0b8
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ds.l 1 ; 0bc
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ds.l 1 ; 0c0
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MQ ds.l 1 ; 0c4 ; 601 only
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EDPOffsetSWIRelated ds.l 1 ; 0c8
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PriorityShifty ds.l 1 ; 0cc ; if low nybble is empty, SchInit sets this to 2
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@ -131,11 +149,8 @@ FE000000 ds.l 1 ; 0e8 ; also LR?
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LR ds.l 1 ; 0ec
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CTR ds.l 1 ; 0f0
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KernelCTR ds.l 1 ; 0f4
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org 0xfc
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ds.l 1 ; 0f8
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CodePtr ds.l 1 ; 0fc ; probably goes in SRR0?
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org 0x100
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ds.l 1
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r0 ds.l 1 ; 104
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ds.l 1
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@ -200,7 +215,5 @@ r29 ds.l 1 ; 1ec
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r30 ds.l 1 ; 1f4
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ds.l 1
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r31 ds.l 1 ; 1fc
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FloatRegisters ds.d 32 ; 200:300
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endr
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@ -2,27 +2,6 @@
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; Data structures internal to the NanoKernel
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;_______________________________________________________________________
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;_______________________________________________________________________
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; NOTE: DECLARING BIT FIELDS
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;
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; Bit fields get defined inside a record only in order to give them a
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; namespace (e.g. MSR_IP). The _bitEqu macro is used to produce three
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; equates per bit:
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; (name) = the bit's place value
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; (name)bit = the bit's PowerPC index (0 is leftmost)
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; (name)shift = the bit's 68k index (0 is rightmost)
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;_______________________________________________________________________
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macro
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_bitEqu &name, &bit
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&name equ 1 << (31-&bit)
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&name.bit equ &bit
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&name.shift equ 31 - &bit
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endm
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;_______________________________________________________________________
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; INFORECORD PAGE
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;
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@ -131,7 +110,7 @@ NominalReadyQ ds.l 8 ; -9b0:-990 ; unblocked tasks with priority 2
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IdleReadyQ ds.l 8 ; -990:-970 ; unblocked tasks with priority 3
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PriorityFlags ds.l 1 ; -970 ; bit 0 is 0, bit 1 is 1, etc...
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ScrambledMPCallTime ds.l 1 ; -96c ; by MP call return
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FlagsTemplate ds.l 1 ; -968 ; typically just EWA.kFlagVec
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FlagsTemplate ds.l 1 ; -968 ; typically just bitFlagVec
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UserModeMSR ds.l 1 ; -964
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ThudBuffer ds.b 96 ; -960:-900 ; that's the kernel debugger
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NoIdeaR23 ds.l 1 ; -900 ; r23 copies here... replated to RTAS?
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@ -505,45 +484,6 @@ r31 ds.l 1 ; 07c, cpu+3bc
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; Fun fact: offsets past here contain the main kernel globals
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; ("Kernel Data Page"), but only on CPU-0.
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kFlag0 equ 0
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kFlag1 equ 1
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kFlag2 equ 2
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kFlag3 equ 3
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kFlag4 equ 4
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kFlag5 equ 5
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kFlag6 equ 6
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kFlag7 equ 7
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; PER-TASK FLAGS
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kFlagEmu equ 8 ; emulator is running
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kFlag9 equ 9 ; * = preserved on alt>sys switch
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kFlagBlue equ 10 ; *
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kFlag11 equ 11 ; *
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kFlagVec equ 12 ; *
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kFlagHasMQ equ 13 ; *
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kFlag14 equ 14 ; *
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kFlag15 equ 15 ; *
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kFlagSIGP equ 16 ; *
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; PER-CONTEXT FLAGS
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kFlag17 equ 17
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kFlag18 equ 18
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kFlag19 equ 19
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kFlagFE0 equ 20 ; these correspond with MSR bits
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kFlagSE equ 21
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kFlagBE equ 22
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kFlagFE1 equ 23
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kFlag24 equ 24
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kFlag25 equ 25
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kFlag26 equ 26 ; can be copied from kFlagSE
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kFlagLowSaves equ 27
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kFlag28 equ 28
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kFlag29 equ 29
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kFlag30 equ 30
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kFlag31 equ 31
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endr
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@ -616,7 +556,7 @@ PA_ECB ds.l 1 ; 658 ; gets called "system context"
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PA_ContextBlock ds.l 1 ; 65c ; moved to EWA (per-CPU) in NKv2
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Flags ds.l 1 ; 660 ; moved to EWA (per-CPU) in NKv2
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Enables ds.l 1 ; 664 ; moved to EWA (per-CPU) in NKv2
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ds.l 1 ; 668
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ContextClock ds.l 1 ; 668
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PA_PageMapEnd ds.l 1 ; 66c ; Set at the same time as PA_PageMapStart below...
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TestIntMaskInit ds.l 1 ; 670 ; These are all copied from ConfigInfo...
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PostIntMaskInit ds.l 1 ; 674
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@ -3,27 +3,38 @@
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;_______________________________________________________________________
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; Helps with making equates
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; X = 0x00008000, Xbit=16, Xshift=15
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macro
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_bitEqu &bit, &name
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&name equ 1 << (31-&bit)
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bit&name equ &bit
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shift&name equ 31 - &bit
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endm
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kNanoKernelVersion equ $0228
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; PowerPC Machine Status Register (MSR) bits
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; (borrowing the _bitEqu macro from NKInfoRecordsPriv.s)
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_bitEqu MSR_POW, 13
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_bitEqu MSR_ILE, 15
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_bitEqu MSR_EE, 16
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_bitEqu MSR_PR, 17
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_bitEqu MSR_FP, 18
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_bitEqu MSR_ME, 19
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_bitEqu MSR_FE0, 20
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_bitEqu MSR_SE, 21
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_bitEqu MSR_BE, 22
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_bitEqu MSR_FE1, 23
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_bitEqu MSR_IP, 25
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_bitEqu MSR_IR, 26
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_bitEqu MSR_DR, 27
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_bitEqu MSR_RI, 30
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_bitEqu MSR_LE, 31
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_bitEqu 13, MsrPOW
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_bitEqu 15, MsrILE
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_bitEqu 16, MsrEE
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_bitEqu 17, MsrPR
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_bitEqu 18, MsrFP
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_bitEqu 19, MsrME
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_bitEqu 20, MsrFE0
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_bitEqu 21, MsrSE
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_bitEqu 22, MsrBE
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_bitEqu 23, MsrFE1
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_bitEqu 25, MsrIP
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_bitEqu 26, MsrIR
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_bitEqu 27, MsrDR
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_bitEqu 30, MsrRI
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_bitEqu 31, MsrLE
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; Special Purpose Registers (SPRs) not understood by MPW
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@ -92,3 +103,38 @@ ecDataWriteViolation equ 21 ; ExceptionMemRetried
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ecDataSupAccessViolation equ 22 ; ExceptionMemRetried
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ecDataSupWriteViolation equ 23 ; ?
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ecUnknown24 equ 24 ; ExceptionMemRetried
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; Runtime Flag equates
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_bitEqu 0, Flag0
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_bitEqu 1, Flag1
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_bitEqu 2, Flag2
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_bitEqu 3, Flag3
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_bitEqu 4, Flag4
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_bitEqu 5, Flag5
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_bitEqu 6, Flag6
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_bitEqu 7, Flag7
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_bitEqu 8, FlagEmu
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_bitEqu 9, Flag9
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_bitEqu 10, FlagBlue
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_bitEqu 11, Flag11
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_bitEqu 12, FlagVec
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_bitEqu 13, FlagHasMQ
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_bitEqu 14, Flag14
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_bitEqu 15, Flag15
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_bitEqu 16, FlagSIGP
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_bitEqu 17, Flag17
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_bitEqu 18, Flag18
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_bitEqu 19, Flag19
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_bitEqu 20, FlagFE0
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_bitEqu 21, FlagSE
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_bitEqu 22, FlagBE
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_bitEqu 23, FlagFE1
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_bitEqu 24, Flag24
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_bitEqu 25, Flag25
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_bitEqu 26, Flag26
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_bitEqu 27, FlagLowSaves
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_bitEqu 28, Flag28
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_bitEqu 29, Flag29
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_bitEqu 30, Flag30
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_bitEqu 31, Flag31
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File diff suppressed because it is too large
Load Diff
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@ -14,11 +14,11 @@ IntFPUnavail
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stw r11, KDP.NanoKernelInfo + NKNanoKernelInfo.FPUReloadCount(r1)
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mfsrr1 r11
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_bset r11, r11, MSR_FPbit
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_bset r11, r11, bitMsrFP
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mtsrr1 r11
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mfmsr r11 ; need this to access float registers
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_bset r11, r11, MSR_FPbit
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_bset r11, r11, bitMsrFP
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lwz r6, KDP.PA_ContextBlock(r1)
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mtmsr r11
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@ -35,18 +35,20 @@ IntFPUnavail
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########################################################################
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major_0x03e18
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EnableFPU
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rlwinm. r8, r11, 0, 18, 18
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bnelr
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IntHandleSpecialFPException
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lwz r8, 0xe4(r6)
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ReloadFPU
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lwz r8, 0xe4(r6) ; ???
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rlwinm. r8, r8, 1, 0, 0
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mfmsr r8
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_bset r8, r8, MSR_FPbit
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_bset r8, r8, bitMsrFP
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beqlr
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mtmsr r8
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_bset r11, r11, MSR_FPbit
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_bset r11, r11, bitMsrFP
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########################################################################
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@ -92,10 +94,10 @@ LoadFloats
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DisableFPU
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mfmsr r8
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_bset r8, r8, MSR_FPbit
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_bset r8, r8, bitMsrFP
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mtmsr r8
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_bclr r11, r11, MSR_FPbit
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_bclr r11, r11, bitMsrFP
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stfd f0, 0x200(r6)
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stfd f1, 0x208(r6)
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@ -268,7 +268,7 @@ _bclr_lbit set 31
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MACRO
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_FloatRangeToContextBlock &first, &last
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stfd &first, ContextBlock.FloatRegisters+8*(&first)(r6)
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stfd &first, CB.FloatRegisters+8*(&first)(r6)
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IF &first != &last
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_FloatRangeToContextBlock &first+1, &last
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@ -280,7 +280,7 @@ _bclr_lbit set 31
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MACRO
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_FloatRangeFromContextBlock &first, &last
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lfd &first, ContextBlock.FloatRegisters+8*(&first)(r6)
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lfd &first, CB.FloatRegisters+8*(&first)(r6)
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IF &first != &last
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_FloatRangeFromContextBlock &first+1, &last
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@ -5,7 +5,7 @@
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IllegalInstruction
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mfmsr r9
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_bset r8, r9, MSR_DRbit
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_bset r8, r9, bitMsrDR
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mtmsr r8
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lwz r8, 0(r10)
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mtmsr r9
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@ -15,19 +15,19 @@ IllegalInstruction
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stw r3, EWA.r3(r1)
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stw r4, EWA.r4(r1)
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stw r5, EWA.r5(r1)
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lwz r9, ContextBlock.r7(r6)
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lwz r9, CB.r7(r6)
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stw r9, EWA.r7(r1)
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lwz r9, ContextBlock.r8(r6)
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lwz r9, CB.r8(r6)
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stw r9, EWA.r8(r1)
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lwz r9, ContextBlock.r9(r6)
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lwz r9, CB.r9(r6)
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stw r9, EWA.r9(r1)
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lwz r9, ContextBlock.r10(r6)
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lwz r9, CB.r10(r6)
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stw r9, EWA.r10(r1)
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lwz r9, ContextBlock.r11(r6)
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lwz r9, CB.r11(r6)
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stw r9, EWA.r11(r1)
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lwz r9, ContextBlock.r12(r6)
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lwz r9, CB.r12(r6)
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stw r9, EWA.r12(r1)
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lwz r9, ContextBlock.r13(r6)
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lwz r9, CB.r13(r6)
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stw r9, EWA.r13(r1)
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stmw r14, EWA.r14(r1)
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@ -89,7 +89,7 @@ IllegalInstruction
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addi r23, r23, 1
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stw r23, KDP.NanoKernelInfo + NKNanoKernelInfo.EmulatedUnimpInstCount(r1)
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mfmsr r14
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_bset r15, r14, MSR_DRbit
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_bset r15, r14, bitMsrDR
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b loc_A38
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########################################################################
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@ -119,11 +119,11 @@ KCallRunAlternateContext
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lwz r8, KDP.LA_EmulatorKernelTrapTable(r1)
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mtcrf 0x3f, r7
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clrlwi r7, r7, 8
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stw r8, ContextBlock.LA_EmulatorKernelTrapTable(r9)
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stw r8, CB.ExceptionHandlerRetAddr(r9)
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stw r9, KDP.PA_ContextBlock(r1)
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b IntReturnToOtherBlueContext
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b SwitchContext ; OldCB *r6, NewCB *r9
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@search_cache
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@ -255,7 +255,7 @@ KCallResetSystem
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; Gary Davidian skeleton key: r5/D0 = MSR bits to unset, r7/D2 = MSR bits to set
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andc r11, r11, r5
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lwz r8, ContextBlock.r7(r6)
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lwz r8, CB.r7(r6)
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or r11, r11, r8
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b IntReturn
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@ -275,18 +275,18 @@ KCallPrioritizeInterrupts
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mtsrr0 r10
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mtsrr1 r11
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mtcr r13
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lwz r10, ContextBlock.r10(r6)
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lwz r11, ContextBlock.r11(r6)
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lwz r12, ContextBlock.r12(r6)
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lwz r13, ContextBlock.r13(r6)
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lwz r7, ContextBlock.r7(r6)
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lwz r10, CB.r10(r6)
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lwz r11, CB.r11(r6)
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lwz r12, CB.r12(r6)
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lwz r13, CB.r13(r6)
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lwz r7, CB.r7(r6)
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lwz r8, EWA.r1(r1)
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mfsprg r9, 3
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lwz r9, VecTable.ExternalIntVector(r9)
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||||
mtsprg 1, r8
|
||||
mtlr r9
|
||||
lwz r8, ContextBlock.r8(r6)
|
||||
lwz r9, ContextBlock.r9(r6)
|
||||
lwz r8, CB.r8(r6)
|
||||
lwz r9, CB.r9(r6)
|
||||
lwz r6, EWA.r6(r1)
|
||||
blrl ; (could this ever fall though to KCallSystemCrash?)
|
||||
|
||||
|
|
@ -300,22 +300,22 @@ KCallSystemCrash
|
|||
stw r4, EWA.r4(r1)
|
||||
stw r5, EWA.r5(r1)
|
||||
|
||||
lwz r8, ContextBlock.r7(r6)
|
||||
lwz r9, ContextBlock.r8(r6)
|
||||
lwz r8, CB.r7(r6)
|
||||
lwz r9, CB.r8(r6)
|
||||
stw r8, EWA.r7(r1)
|
||||
stw r9, EWA.r8(r1)
|
||||
|
||||
lwz r8, ContextBlock.r9(r6)
|
||||
lwz r9, ContextBlock.r10(r6)
|
||||
lwz r8, CB.r9(r6)
|
||||
lwz r9, CB.r10(r6)
|
||||
stw r8, EWA.r9(r1)
|
||||
stw r9, EWA.r10(r1)
|
||||
|
||||
lwz r8, ContextBlock.r11(r6)
|
||||
lwz r9, ContextBlock.r12(r6)
|
||||
lwz r8, CB.r11(r6)
|
||||
lwz r9, CB.r12(r6)
|
||||
stw r8, EWA.r11(r1)
|
||||
stw r9, EWA.r12(r1)
|
||||
|
||||
lwz r8, ContextBlock.r13(r6)
|
||||
lwz r8, CB.r13(r6)
|
||||
stw r8, EWA.r13(r1)
|
||||
|
||||
stmw r14, EWA.r14(r1)
|
||||
|
|
@ -334,13 +334,13 @@ IntProgram
|
|||
mfsprg r6, 1
|
||||
stw r6, EWA.r1(r1)
|
||||
lwz r6, KDP.PA_ContextBlock(r1)
|
||||
stw r7, ContextBlock.r7(r6)
|
||||
stw r8, ContextBlock.r8(r6)
|
||||
stw r9, ContextBlock.r9(r6)
|
||||
stw r10, ContextBlock.r10(r6)
|
||||
stw r11, ContextBlock.r11(r6)
|
||||
stw r12, ContextBlock.r12(r6)
|
||||
stw r13, ContextBlock.r13(r6)
|
||||
stw r7, CB.r7(r6)
|
||||
stw r8, CB.r8(r6)
|
||||
stw r9, CB.r9(r6)
|
||||
stw r10, CB.r10(r6)
|
||||
stw r11, CB.r11(r6)
|
||||
stw r12, CB.r12(r6)
|
||||
stw r13, CB.r13(r6)
|
||||
|
||||
; Compare SRR0 with address of Emulator's KCall trap table
|
||||
lwz r8, KDP.LA_EmulatorKernelTrapTable(r1)
|
||||
|
|
@ -349,11 +349,11 @@ IntProgram
|
|||
xor. r8, r10, r8
|
||||
lwz r7, KDP.Flags(r1)
|
||||
mfsprg r12, 2
|
||||
beq ReturnFromExceptionFastPath ; KCall in Emulator table => fast path
|
||||
rlwimi. r7, r7, EWA.kFlagEmu, 0, 0
|
||||
beq KCallReturnFromExceptionFastPath ; KCall in Emulator table => fast path
|
||||
rlwimi. r7, r7, bitFlagEmu, 0, 0
|
||||
cmplwi cr7, r8, 16 * 4
|
||||
bge cr0, @fromAltContext ; Alt Context cannot make KCalls; this might be an External Int
|
||||
bge cr7, @notFromEmulatorTrapTable ; from Emulator but not from its KCall table => do more checks
|
||||
bge cr0, @fromAltContext ; Alt Context cannot make KCalls; this might be an External Int
|
||||
bge cr7, @notFromEmulatorTrapTable ; from Emulator but not from its KCall table => do more checks
|
||||
|
||||
; SUCCESSFUL TRAP from emulator KCall table
|
||||
; => Service call then return to link register
|
||||
|
|
@ -373,14 +373,14 @@ IntProgram
|
|||
mtcrf 0x70, r11
|
||||
bc BO_IF_NOT, 14, @notTrap
|
||||
|
||||
mfmsr r9 ; fetch the instruction to get the "trap number"
|
||||
_bset r8, r9, MSR_DRbit
|
||||
mfmsr r9 ; fetch the instruction to get the "trap number"
|
||||
_bset r8, r9, bitMsrDR
|
||||
mtmsr r8
|
||||
lwz r8, 0(r10)
|
||||
mtmsr r9
|
||||
xoris r8, r8, 0xfff
|
||||
cmplwi cr7, r8, 16 ; only traps 0-15 are allowed
|
||||
slwi r8, r8, 2 ; (for "success" case below)
|
||||
cmplwi cr7, r8, 16 ; only traps 0-15 are allowed
|
||||
slwi r8, r8, 2 ; (for "success" case below)
|
||||
bge cr7, @illegalTrap
|
||||
|
||||
; SUCCESSFUL TRAP from outside emulator KCall table
|
||||
|
|
@ -396,17 +396,17 @@ IntProgram
|
|||
blr
|
||||
|
||||
; Cannot service with a KCall => throw Exception
|
||||
@fromAltContext ; external interrupt, or a (forbidden) KCall attempt
|
||||
@fromAltContext ; external interrupt, or a (forbidden) KCall attempt
|
||||
mfsrr1 r11
|
||||
mtcrf 0x70, r11
|
||||
@notTrap ; then it was some other software exception
|
||||
@notTrap ; then it was some other software exception
|
||||
bc BO_IF, 12, IllegalInstruction
|
||||
bc BO_IF, 11, @floatingPointException
|
||||
@illegalTrap ; because we only allow traps 0-15
|
||||
@illegalTrap ; because we only allow traps 0-15
|
||||
rlwinm r8, r11, 17, 28, 29
|
||||
addi r8, r8, 0x4b3
|
||||
rlwnm r8, r8, r8, 28, 31
|
||||
b Exception ; CLEVER BIT HACKING described below
|
||||
b Exception ; CLEVER BIT HACKING described below
|
||||
|
||||
; SRR1[13] SRR[14] Exception
|
||||
; 0 0 ecNoException
|
||||
|
|
|
|||
|
|
@ -50,6 +50,8 @@ FDP
|
|||
FDP_003C
|
||||
org 0xA38
|
||||
loc_A38
|
||||
org 0xD18
|
||||
FDP_011C
|
||||
org 0xD50
|
||||
loc_D50
|
||||
FDP_0DA0
|
||||
|
|
@ -76,27 +78,8 @@ PagingL2PWithoutBATs
|
|||
org 0x1F98
|
||||
PagingFlushTLB
|
||||
org 0x1FB8
|
||||
ExceptionMemRetried
|
||||
org 0x2034
|
||||
LetBlueHandleOwnException
|
||||
org 0x20C0
|
||||
ReturnFromExceptionFastPath
|
||||
org 0x20D8
|
||||
KCallReturnFromException
|
||||
org 0x2194
|
||||
LoadInterruptRegisters
|
||||
org 0x21DC
|
||||
Exception
|
||||
org 0x2204
|
||||
IntReturnToSystemContext
|
||||
org 0x2214
|
||||
IntReturnToOtherBlueContext
|
||||
org 0x23AC
|
||||
IntReturn
|
||||
org 0x23F0
|
||||
major_0x02ccc
|
||||
org 0x2500
|
||||
|
||||
include 'NKExceptions.s'
|
||||
include 'NKFloatingPt.s'
|
||||
include 'NKSoftInt.s'
|
||||
include 'NKLegacyVM.s'
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user