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- MODULE Machine; (** AUTHOR "pjm, G.F."; PURPOSE "Bootstrapping, configuration and machine interface"; *)
- IMPORT S := SYSTEM, Trace, Unix, Glue;
- CONST
- DefaultConfig = "Color 0 StackSize 128";
-
- Version = "Aos (rev.6640)";
- DefaultObjectFileExtension* = ".Obj";
-
- Second* = 1000; (* frequency of ticks increments in Hz *)
- (** bits in features variable *)
- MTTR* = 12; MMX* = 23;
-
- AddrSize = SIZEOF( ADDRESS );
- SizeSize = SIZEOF( SIZE );
-
- AddressSize = SIZEOF(ADDRESS);
- BlockHeaderSize = 2 * AddressSize;
- RecordDescSize = 4 * AddressSize; (* needs to be adapted in case Heaps.RecordBlockDesc is changed *)
- StaticBlockSize = 32; (* static heap block size *)
- BlockSize = 32;
- MemBlockSize* = 64*1024*1024;
-
- TraceOutput* = 0; (* Trace output *)
- Memory* = 1; (*! Virtual memory management, stack and page allocation, not used in UnixAos *)
- Heaps* = 2; (* Storage allocation and Garbage collection *)
- Interrupts* = 3; (*! Interrupt handling, not used in UnixAos *)
- Modules* = 4; (* Module list *)
- Objects* = 5; (*! Ready queue, not used in UnixAos *)
- Processors* = 6; (*! Interprocessor interrupts, not used in UnixAos *)
- KernelLog* = 7; (* Atomic output *)
- X11* = 8; (* XWindows I/O *)
- Trap* = 9;
- GC = 10;
- MaxLocks* = 11; (* { <= 32 } *)
-
- MaxCPU* = 4;
- IsCooperative* = FALSE;
- TYPE
- Vendor* = ARRAY 13 OF CHAR;
- MemoryBlock* = POINTER TO MemoryBlockDesc;
- MemoryBlockDesc* = RECORD
- next- {UNTRACED}: MemoryBlock;
- startAdr-: ADDRESS; (* sort key in linked list of memory blocks *)
- size-: SIZE;
- beginBlockAdr-, endBlockAdr-: ADDRESS
- END;
-
- (** processor state, ordering of record fields is predefined! *)
- (*!(not used in UnixAos, for interface compatibility only)*)
- State* = RECORD (* offsets used in FieldInterrupt, FieldIRQ and Objects.RestoreState *)
- EDI*, ESI*, ERR*, ESP0*, EBX*, EDX*, ECX*, EAX*: LONGINT; (** ESP0 = ADR(s.INT) *)
- INT*, BP*, PC*, CS*: LONGINT; (* BP and ERR are exchanged by glue code, for procedure link *)
- FLAGS*: SET;
- SP*, SS*: LONGINT; (** only valid if (VMBit IN s.EFLAGS) OR (CS MOD 4 < s.CS MOD 4) *)
- ES*, DS*, FS*, GS*: LONGINT; (** only valid if (VMBit IN s.FLAGS) *)
- END;
-
-
- VAR
- mtx : ARRAY MaxLocks OF Unix.Mutex_t;
-
- version-: ARRAY 64 OF CHAR; (** Aos version *)
-
- features-, features2 : SET;
- MMXSupport- : BOOLEAN;
- SSESupport- : BOOLEAN;
- SSE2Support- : BOOLEAN;
- SSE3Support- : BOOLEAN;
- SSSE3Support- : BOOLEAN;
- SSE41Support- : BOOLEAN;
- SSE42Support- : BOOLEAN;
- SSE5Support- : BOOLEAN;
- AVXSupport- : BOOLEAN;
-
- GCacquired- : BOOLEAN;
-
- ticks-: LONGINT; (** timer ticks. Use Kernel.GetTicks() to read, don't write *)
-
- prioLow-, prioHigh-: LONGINT; (* permitted thread priorities *)
-
- fcr-: SET; (** default floating-point control register value (default rounding mode is towards -infinity, for ENTIER) *)
- mhz-: HUGEINT; (** clock rate of GetTimer in MHz, or 0 if not known *)
-
- standaloneAppl-: BOOLEAN;
-
- firstMemBlock: MemoryBlockDesc; (* pseudo heap *)
-
- gcThreshold-: SIZE;
- memBlockHead-{UNTRACED}, memBlockTail-{UNTRACED}: MemoryBlock; (* head and tail of sorted list of memory blocks *)
-
- config: ARRAY 2048 OF CHAR; (* config strings *)
-
- (*
- Unix.ThrInitialize : PROCEDURE {REALTIME, C} ( VAR low, high: LONGINT ): BOOLEAN;
-
- Unix.MtxInit : PROCEDURE {REALTIME, C} ( dummy: LONGINT ): Unix.Mutex_t;
- Unix.MtxDestroy : PROCEDURE {REALTIME, C} ( mtx: Unix.Mutex_t );
- Unix.MtxLock : PROCEDURE {REALTIME, C} ( mtx: Unix.Mutex_t );
- Unix.MtxUnlock : PROCEDURE {REALTIME, C} ( mtx: Unix.Mutex_t );
-
- conInit : PROCEDURE {REALTIME, C} ( dummy: LONGINT ): Unix.Condition_t;
- conDestroy : PROCEDURE {REALTIME, C} ( cond: Unix.Condition_t );
- conWait : PROCEDURE {REALTIME, C} ( cond: Unix.Condition_t; mtx: Unix.Mutex_t );
- conSignal : PROCEDURE {REALTIME, C} ( cond: Unix.Condition_t );
-
- thrSleep : PROCEDURE {REALTIME, C} ( ms: LONGINT );
- thrThis : PROCEDURE {REALTIME, C} ( dummy: LONGINT ): Unix.Thread_t;
- *)
-
- logfile: LONGINT;
- traceHeap: BOOLEAN;
- timer0 : HUGEINT;
- (** Return current processor ID (0 to MaxNum-1). *)
- PROCEDURE {REALTIME} ID* (): LONGINT;
- BEGIN
- RETURN 0
- END ID;
- (**
- * Flush Data Cache for the specified virtual address range. If len is negative, flushes the whole cache.
- * This is used on some architecture to interact with DMA hardware (e.g. Ethernet and USB. It can be
- * left empty on Intel architecture.
- *)
- PROCEDURE FlushDCacheRange * (adr: ADDRESS; len: LONGINT);
- END FlushDCacheRange;
- (**
- * Invalidate Data Cache for the specified virtual address range. If len is negative, flushes the whole cache.
- * This is used on some architecture to interact with DMA hardware (e.g. Ethernet and USB. It can be
- * left empty on Intel architecture.
- *)
- PROCEDURE InvalidateDCacheRange * (adr: ADDRESS; len: LONGINT);
- END InvalidateDCacheRange;
- (**
- * Invalidate Instruction Cache for the specified virtual address range. If len is negative, flushes the whole cache.
- * This is used on some architecture to interact with DMA hardware (e.g. Ethernet and USB. It can be
- * left empty on Intel architecture.
- *)
- PROCEDURE InvalidateICacheRange * (adr: ADDRESS; len: LONGINT);
- END InvalidateICacheRange;
-
- (* insert given memory block in sorted list of memory blocks, sort key is startAdr field - called during GC *)
- PROCEDURE InsertMemoryBlock(memBlock: MemoryBlock);
- VAR cur {UNTRACED}, prev {UNTRACED}: MemoryBlock;
- BEGIN
- cur := memBlockHead;
- prev := NIL;
- WHILE (cur # NIL) & (cur.startAdr < memBlock.startAdr) DO
- prev := cur;
- cur := cur.next
- END;
- IF prev = NIL THEN (* insert at head of list *)
- memBlock.next := memBlockHead;
- memBlockHead := memBlock
- ELSE (* insert in middle or at end of list *)
- prev.next := memBlock;
- memBlock.next := cur;
- IF cur = NIL THEN
- memBlockTail := memBlock
- END
- END
- END InsertMemoryBlock;
-
- (* Free unused memory block - called during GC *)
- PROCEDURE FreeMemBlock*(memBlock: MemoryBlock);
- VAR cur {UNTRACED}, prev {UNTRACED}: MemoryBlock;
- BEGIN
- cur := memBlockHead;
- prev := NIL;
- WHILE (cur # NIL) & (cur # memBlock) DO
- prev := cur;
- cur := cur.next
- END;
- IF cur = memBlock THEN
- IF traceHeap THEN
- Trace.String( "Release memory block " ); Trace.Hex( memBlock.startAdr, -8 ); Trace.Ln
- END;
- IF prev = NIL THEN
- memBlockHead := cur.next
- ELSE
- prev.next := cur.next;
- IF cur.next = NIL THEN
- memBlockTail := prev
- END
- END;
- Unix.free( memBlock.startAdr )
- ELSE
- HALT(535) (* error in memory block management *)
- END;
- END FreeMemBlock;
-
- (* expand heap by allocating a new memory block *)
- PROCEDURE ExpandHeap*( dummy: LONGINT; size: SIZE; VAR memoryBlock: MemoryBlock; VAR beginBlockAdr, endBlockAdr: ADDRESS );
- VAR mBlock: MemoryBlock; alloc, s: SIZE; a, adr: ADDRESS;
- BEGIN
- IF size < (MemBlockSize - (2*BlockSize)) THEN alloc := MemBlockSize
- ELSE alloc := size + (2*BlockSize);
- END;
- INC( alloc, (-alloc) MOD Unix.PageSize );
-
- IF Unix.posix_memalign( adr, Unix.PageSize, alloc ) # 0 THEN
- Unix.Perror( "Machine.ExpandHeap: posix_memalign" );
- beginBlockAdr := 0;
- endBlockAdr := 0
- ELSE
- IF Unix.mprotect( adr, alloc, 7 (* READ WRITE EXEC *) ) # 0 THEN
- Unix.Perror( "Machine.ExpandHeap: mprotect" )
- END;
-
- mBlock := S.VAL( MemoryBlock, adr );
- mBlock.next := NIL;
- mBlock.startAdr := adr;
- mBlock.size := alloc;
- mBlock.beginBlockAdr := adr + BlockSize - AddrSize;
-
- ASSERT( (mBlock.beginBlockAdr + AddrSize) MOD BlockSize = 0 );
- s := adr + alloc - mBlock.beginBlockAdr - BlockSize;
- DEC( s, s MOD BlockSize );
- ASSERT( s >= size );
- mBlock.endBlockAdr := mBlock.beginBlockAdr + s;
-
- InsertMemoryBlock( mBlock );
- IF traceHeap THEN TraceHeap( mBlock ) END;
-
- a := mBlock.beginBlockAdr;
- S.PUT( a, a + AddrSize ); (* tag *)
- S.PUT( a + AddrSize, s - AddrSize ); (* size *)
- S.PUT( a + AddrSize + SizeSize, S.VAL( ADDRESS, 0 ) ); (* next *)
-
- beginBlockAdr := mBlock.beginBlockAdr;
- endBlockAdr := mBlock.endBlockAdr;
- memoryBlock := mBlock;
- END
- END ExpandHeap;
-
- (* Set memory block end address *)
- PROCEDURE SetMemoryBlockEndAddress*(memBlock: MemoryBlock; endBlockAdr: ADDRESS);
- BEGIN
- ASSERT(endBlockAdr >= memBlock.beginBlockAdr);
- memBlock.endBlockAdr := endBlockAdr
- END SetMemoryBlockEndAddress;
- PROCEDURE TraceHeap( new: MemoryBlock );
- VAR cur{UNTRACED}: MemoryBlock;
- BEGIN
- Trace.Ln;
- Trace.String( "Heap expanded" ); Trace.Ln;
- cur := memBlockHead;
- WHILE cur # NIL DO
- Trace.Hex( cur.startAdr, -8 ); Trace.String( " " ); Trace.Int( cur.size, 15 );
- IF cur = new THEN Trace.String( " (new)" ) END;
- Trace.Ln;
- cur := cur.next
- END
- END TraceHeap;
- (** Get first memory block and first free address, the first free address is identical to memBlockHead.endBlockAdr *)
- PROCEDURE GetStaticHeap*(VAR beginBlockAdr, endBlockAdr, freeBlockAdr: ADDRESS);
- VAR memBlockAdr: ADDRESS;
- BEGIN
- InitHeap(memBlockHead,beginBlockAdr, endBlockAdr);
- memBlockTail := memBlockHead;
- (*
- SYSTEM.GET(bootHeapAdr + EndBlockOfs, freeBlockAdr);
- ASSERT(freeBlockAdr MOD StaticBlockSize = 0);
- memBlockAdr := bootHeapAdr + HeaderSize + MemoryBlockOfs;
- memBlockHead := SYSTEM.VAL(MemoryBlock, memBlockAdr); (* this block will never be freed since there is a global reference (initBlock in Heaps.Mod) to it *)
- memBlockHead.startAdr := bootHeapAdr;
- memBlockHead.size := bootHeapSize;
- ASSERT(memBlockHead.beginBlockAdr MOD StaticBlockSize = 0);
- ASSERT((memBlockHead.endBlockAdr - memBlockHead.beginBlockAdr) MOD StaticBlockSize = 0);
- memBlockTail := memBlockHead;
- *)
- beginBlockAdr := memBlockHead.beginBlockAdr;
- endBlockAdr := memBlockHead.endBlockAdr;
- freeBlockAdr := beginBlockAdr;
- END GetStaticHeap;
- (* returns if an address is a currently allocated heap address *)
- PROCEDURE ValidHeapAddress*( p: ADDRESS ): BOOLEAN;
- VAR mb: MemoryBlock;
- BEGIN
- mb := memBlockHead;
- WHILE mb # NIL DO
- IF (p >= mb.beginBlockAdr) & (p <= mb.endBlockAdr) THEN RETURN TRUE END;
- mb := mb.next;
- END;
- RETURN TRUE;
- RETURN FALSE
- END ValidHeapAddress;
-
- (** Return information on free memory in Kbytes. *)
- PROCEDURE GetFreeK*(VAR total, lowFree, highFree: SIZE);
- BEGIN
- (*! meaningless in Unix port, for interface compatibility only *)
- total := 0;
- lowFree := 0;
- highFree := 0
- END GetFreeK;
-
-
- (** Fill "size" bytes at "destAdr" with "filler". "size" must be multiple of 4. *)
- PROCEDURE {REALTIME} Fill32* (destAdr: ADDRESS; size: SIZE; filler: LONGINT);
- CODE {SYSTEM.i386}
- MOV EDI, [EBP+destAdr]
- MOV ECX, [EBP+size]
- MOV EAX, [EBP+filler]
- TEST ECX, 3
- JZ ok
- PUSH 8 ; ASSERT failure
- INT 3
- ok:
- SHR ECX, 2
- CLD
- REP STOSD
- END Fill32;
- PROCEDURE Portin8*(port: LONGINT; VAR val: CHAR);
- END Portin8;
- PROCEDURE Portin16*(port: LONGINT; VAR val: INTEGER);
- END Portin16;
- PROCEDURE Portin32*(port: LONGINT; VAR val: LONGINT);
- END Portin32;
- PROCEDURE Portout8*(port: LONGINT; val: CHAR);
- END Portout8;
- PROCEDURE Portout16*(port: LONGINT; val: INTEGER);
- END Portout16;
- PROCEDURE Portout32*(port: LONGINT; val: LONGINT);
- END Portout32;
- (** -- Atomic operations -- *)
- (** Atomic INC(x). *)
- PROCEDURE -AtomicInc*(VAR x: LONGINT);
- CODE {SYSTEM.i386}
- POP EAX
- LOCK
- INC DWORD [EAX]
- END AtomicInc;
- (** Atomic DEC(x). *)
- PROCEDURE -AtomicDec*(VAR x: LONGINT);
- CODE {SYSTEM.i386}
- POP EAX
- LOCK
- DEC DWORD [EAX]
- END AtomicDec;
- (** Atomic INC(x, y). *)
- PROCEDURE -AtomicAdd*(VAR x: LONGINT; y: LONGINT);
- CODE {SYSTEM.i386}
- POP EBX
- POP EAX
- LOCK
- ADD DWORD [EAX], EBX
- END AtomicAdd;
- (** Atomic EXCL. *)
- PROCEDURE AtomicExcl* (VAR s: SET; bit: LONGINT);
- CODE {SYSTEM.i386}
- MOV EAX, [EBP+bit]
- MOV EBX, [EBP+s]
- LOCK
- BTR [EBX], EAX
- END AtomicExcl;
- (** Atomic test-and-set. Set x = TRUE and return old value of x. *)
- PROCEDURE -AtomicTestSet*(VAR x: BOOLEAN): BOOLEAN;
- CODE {SYSTEM.i386}
- POP EBX
- MOV AL, 1
- XCHG [EBX], AL
- END AtomicTestSet;
- (* Atomic compare-and-swap. Set x = new if x = old and return old value of x *)
- PROCEDURE {REALTIME} -AtomicCAS* (VAR x: LONGINT; old, new: LONGINT): LONGINT;
- CODE {SYSTEM.i386}
- POP EBX ; new
- POP EAX ; old
- POP ECX ; address of x
- DB 0F0X, 00FX, 0B1X, 019X ; LOCK CMPXCHG [ECX], EBX; atomicly compare x with old and set it to new if equal
- END AtomicCAS;
- (* Return current instruction pointer *)
- PROCEDURE {REALTIME} CurrentPC* (): ADDRESS;
- CODE {SYSTEM.i386}
- MOV EAX, [EBP+4]
- END CurrentPC;
- (* Return current frame pointer *)
- PROCEDURE {REALTIME} -CurrentBP* (): ADDRESS;
- CODE {SYSTEM.i386}
- MOV EAX, EBP
- END CurrentBP;
- (* Set current frame pointer *)
- PROCEDURE {REALTIME} -SetBP* (bp: ADDRESS);
- CODE {SYSTEM.i386}
- POP EBP
- END SetBP;
- (* Return current stack pointer *)
- PROCEDURE {REALTIME} -CurrentSP* (): ADDRESS;
- CODE {SYSTEM.i386}
- MOV EAX, ESP
- END CurrentSP;
- (* Set current stack pointer *)
- PROCEDURE {REALTIME} -SetSP* (sp: ADDRESS);
- CODE {SYSTEM.i386}
- POP ESP
- END SetSP;
- PROCEDURE {REALTIME} -GetEAX*(): LONGINT;
- CODE{SYSTEM.i386}
- END GetEAX;
- PROCEDURE {REALTIME} -GetECX*(): LONGINT;
- CODE{SYSTEM.i386}
- MOV EAX,ECX
- END GetECX;
- PROCEDURE {REALTIME} -GetESI*(): LONGINT;
- CODE{SYSTEM.i386}
- MOV EAX,ESI
- END GetESI;
- PROCEDURE {REALTIME} -GetEDI*(): LONGINT;
- CODE{SYSTEM.i386}
- MOV EAX,EDI
- END GetEDI;
- PROCEDURE {REALTIME} -SetEAX*(n: LONGINT);
- CODE{SYSTEM.i386}
- POP EAX
- END SetEAX;
- PROCEDURE {REALTIME} -SetEBX*(n: LONGINT);
- CODE{SYSTEM.i386}
- POP EBX
- END SetEBX;
- PROCEDURE {REALTIME} -SetECX*(n: LONGINT);
- CODE{SYSTEM.i386}
- POP ECX
- END SetECX;
- PROCEDURE {REALTIME} -SetEDX*(n: LONGINT);
- CODE{SYSTEM.i386}
- POP EDX
- END SetEDX;
- PROCEDURE {REALTIME} -SetESI*(n: LONGINT);
- CODE{SYSTEM.i386}
- POP ESI
- END SetESI;
- PROCEDURE {REALTIME} -SetEDI*(n: LONGINT);
- CODE{SYSTEM.i386}
- POP EDI
- END SetEDI;
- PROCEDURE -GetTimer* (): HUGEINT;
- CODE {SYSTEM.Pentium}
- RDTSC ; set EDX:EAX
- END GetTimer;
- (** -- Configuration and bootstrapping -- *)
- (** Return the value of the configuration string specified by parameter name in parameter val. Returns val = "" if the string was not found, or has an empty value. *)
- PROCEDURE GetConfig* (CONST name: ARRAY OF CHAR; VAR val: ARRAY OF CHAR);
- VAR i, src: LONGINT; ch: CHAR;
- BEGIN
- ASSERT (name[0] # "="); (* no longer supported, use GetInit instead *)
- src := -1;
- LOOP
- REPEAT
- INC( src ); ch := config[src];
- IF ch = 0X THEN EXIT END;
- UNTIL ch > ' ';
- i := 0;
- LOOP
- ch := config[src];
- IF (ch # name[i]) OR (name[i] = 0X) THEN EXIT END;
- INC (i); INC (src)
- END;
- IF (ch <= ' ') & (name[i] = 0X) THEN (* found *)
- i := 0;
- REPEAT
- INC (src); ch := config[src]; val[i] := ch; INC (i);
- IF i = LEN(val) THEN val[i - 1] := 0X; RETURN END (* val too short *)
- UNTIL ch <= ' ';
- IF ch = ' ' THEN val[i -1] := 0X END;
- RETURN
- ELSE
- WHILE ch > ' ' DO (* skip to end of name *)
- INC (src); ch := config[src]
- END;
- INC (src);
- REPEAT (* skip to end of value *)
- ch := config[src]; INC (src)
- UNTIL ch <= ' '
- END
- END;
- val[0] := 0X
- END GetConfig;
- (** Convert a string to an integer. Parameter i specifies where in the string scanning should begin (usually 0 in the first call). Scanning stops at the first non-valid character, and i returns the updated position. Parameter s is the string to be scanned. The value is returned as result, or 0 if not valid. Syntax: number = ["-"] digit {digit} ["H" | "h"] . digit = "0" | ... "9" | "A" .. "F" | "a" .. "f" . If the number contains any hexdecimal letter, or if it ends in "H" or "h", it is interpreted as hexadecimal. *)
- PROCEDURE StrToInt* (VAR i: LONGINT; CONST s: ARRAY OF CHAR): LONGINT;
- VAR vd, vh, sgn, d: LONGINT; hex: BOOLEAN;
- BEGIN
- vd := 0; vh := 0; hex := FALSE;
- IF s[i] = "-" THEN sgn := -1; INC (i) ELSE sgn := 1 END;
- LOOP
- IF (s[i] >= "0") & (s[i] <= "9") THEN d := ORD (s[i])-ORD ("0")
- ELSIF (CAP (s[i]) >= "A") & (CAP (s[i]) <= "F") THEN d := ORD (CAP (s[i]))-ORD ("A") + 10; hex := TRUE
- ELSE EXIT
- END;
- vd := 10*vd + d; vh := 16*vh + d;
- INC (i)
- END;
- IF CAP (s[i]) = "H" THEN hex := TRUE; INC (i) END; (* optional H *)
- IF hex THEN vd := vh END;
- RETURN sgn * vd
- END StrToInt;
-
- (* function returning the number of processors that are available to Aos *)
- PROCEDURE NumberOfProcessors*( ): LONGINT;
- BEGIN
- RETURN 1
- END NumberOfProcessors;
- (*! non portable code, for native Aos only *)
- PROCEDURE SetNumberOfProcessors*( num: LONGINT );
- BEGIN
- (* numberOfProcessors := num; *)
- END SetNumberOfProcessors;
- (* function for changing byte order *)
- PROCEDURE ChangeByteOrder* (n: LONGINT): LONGINT;
- CODE { SYSTEM.i486 }
- MOV EAX, [EBP+n] ; load n in eax
- BSWAP EAX ; swap byte order
- END ChangeByteOrder;
- (* Send and print character *)
- PROCEDURE TraceChar *(c: CHAR);
- BEGIN
- Trace.Char( c )
- END TraceChar;
- (** CPU identification *)
- PROCEDURE CPUID*( VAR vendor: Vendor; VAR version: LONGINT; VAR features1,features2: SET );
- CODE {SYSTEM.i386, SYSTEM.Pentium}
- MOV EAX, 0
- CPUID
- CMP EAX, 0
- JNE ok
- MOV ESI, [EBP+vendor]
- MOV [ESI], AL ; AL = 0
- MOV ESI, [EBP+version]
- MOV [ESI], EAX ; EAX = 0
- MOV ESI, [EBP+features1]
- MOV [ESI], EAX
- MOV ESI, [EBP+features2]
- MOV [ESI], EAX
- JMP end
- ok:
- MOV ESI, [EBP+vendor]
- MOV [ESI], EBX
- MOV [ESI+4], EDX
- MOV [ESI+8], ECX
- MOV BYTE [ESI+12], 0
- MOV EAX, 1
- CPUID
- MOV ESI, [EBP+version]
- MOV [ESI], EAX
- MOV ESI, [EBP+features1]
- MOV [ESI], EDX
- MOV ESI, [EBP+features2]
- MOV [ESI], ECX
- end:
- END CPUID;
-
- (* If the CPUID instruction is supported, the ID flag (bit 21) of the EFLAGS register is r/w *)
- PROCEDURE CpuIdSupported( ) : BOOLEAN;
- CODE {SYSTEM.i386}
- PUSHFD ; save EFLAGS
- POP EAX ; store EFLAGS in EAX
- MOV EBX, EAX ; save EBX for later testing
- XOR EAX, 00200000H ; toggle bit 21
- PUSH EAX ; push to stack
- POPFD ; save changed EAX to EFLAGS
- PUSHFD ; push EFLAGS to TOS
- POP EAX ; store EFLAGS in EAX
- CMP EAX, EBX ; see if bit 21 has changed
- SETNE AL; ; return TRUE if bit 21 has changed, FALSE otherwise
- END CpuIdSupported;
-
- (* setup MMX, SSE and SSE2..SSE5 and AVX extension *)
- PROCEDURE SetupSSE2Ext;
- CONST
- MMXFlag=23;(*IN features from EBX*)
- FXSRFlag = 24;
- SSEFlag = 25;
- SSE2Flag = 26;
- SSE3Flag = 0; (*IN features2 from ECX*) (*PH 04/11*)
- SSSE3Flag =9;
- SSE41Flag =19;
- SSE42Flag =20;
- SSE5Flag = 11;
- AVXFlag = 28;
- BEGIN
- MMXSupport := MMXFlag IN features;
- SSESupport := SSEFlag IN features;
- SSE2Support := SSESupport & (SSE2Flag IN features);
- SSE3Support := SSE2Support & (SSE3Flag IN features2);
- SSSE3Support := SSE3Support & (SSSE3Flag IN features2); (* PH 04/11*)
- SSE41Support := SSE3Support & (SSE41Flag IN features2);
- SSE42Support := SSE3Support & (SSE42Flag IN features2);
- SSE5Support := SSE3Support & (SSE5Flag IN features2);
- AVXSupport := SSE3Support & (AVXFlag IN features2);
- IF SSESupport & (FXSRFlag IN features) THEN
- (* InitSSE(); *) (*! not privileged mode in Windows and Unix, not allowed *)
- END;
- END SetupSSE2Ext;
-
- (** -- Processor initialization -- *)
- PROCEDURE -SetFCR( s: SET );
- CODE {SYSTEM.i386, SYSTEM.FPU}
- FLDCW [ESP] ; parameter s
- POP EAX
- END SetFCR;
- PROCEDURE -FCR( ): SET;
- CODE {SYSTEM.i386, SYSTEM.FPU}
- PUSH 0
- FNSTCW [ESP]
- FWAIT
- POP EAX
- END FCR;
- PROCEDURE -InitFPU;
- CODE {SYSTEM.i386, SYSTEM.FPU}
- FNINIT
- END InitFPU;
- (** Setup FPU control word of current processor. *)
- PROCEDURE SetupFPU*;
- BEGIN
- InitFPU; SetFCR( fcr )
- END SetupFPU;
- (* Initialize locks. *)
- PROCEDURE InitLocks;
- VAR i: LONGINT; a: ADDRESS;
- BEGIN
- i := 0;
- WHILE i < MaxLocks DO
- TRACE(i);
- mtx[i] := Unix.MtxInit(0); INC( i ) END;
- END InitLocks;
- PROCEDURE CleanupLocks*;
- VAR i: LONGINT;
- BEGIN
- i := 0;
- WHILE i < MaxLocks DO Unix.MtxDestroy( mtx[i] ); INC( i ) END;
- END CleanupLocks;
-
- (** Acquire a spin-lock. *)
- PROCEDURE Acquire*( level: LONGINT ); (* non reentrant lock *)
- BEGIN
- Unix.MtxLock( mtx[level] );
- END Acquire;
- (** Release a spin-lock. *)
- PROCEDURE Release*( level: LONGINT );
- BEGIN
- Unix.MtxUnlock( mtx[level] );
- END Release;
-
- PROCEDURE AcquireGC*( ): BOOLEAN;
- VAR res: BOOLEAN;
- BEGIN
- Unix.MtxLock( mtx[GC] );
- IF ~GCacquired THEN GCacquired := TRUE; res := TRUE ELSE res := FALSE END;
- Unix.MtxUnlock( mtx[GC] );
- RETURN res
- END AcquireGC;
- (** Release a spin-lock. *)
- PROCEDURE ReleaseGC*;
- BEGIN
- Unix.MtxLock( mtx[GC] );
- GCacquired := FALSE;
- Unix.MtxUnlock( mtx[GC] )
- END ReleaseGC;
-
- PROCEDURE Shutdown*( reboot: BOOLEAN );
- VAR ignore: LONGINT;
- BEGIN
- ignore := Unix.close( logfile );
- IF reboot THEN Unix.exit( 0 ) ELSE Unix.exit( 1 ) END;
- END Shutdown;
-
-
- (* Set machine-dependent parameter gcThreshold *)
- PROCEDURE SetGCParams*;
- BEGIN
- gcThreshold := 10*1024*1024; (* 10 MB *)
- END SetGCParams;
- (* expand heap by allocating a new memory block - called during GC *)
- PROCEDURE InitHeap(VAR memoryBlock: MemoryBlock; VAR beginBlockAdr, endBlockAdr: ADDRESS);
- CONST MemBlockHeaderSize = BlockHeaderSize + RecordDescSize + BlockHeaderSize;
- TypeDescOffset = -AddressSize; (* see Heaps.Mod *)
- HeapBlockOffset = - 2 * AddressSize; (* see Heaps.Mod *)
- DataAdrOffset = AddressSize; (* offset of dataAdr field in Heaps.HeapBlockDesc *)
- VAR memDescSize, memBlkSize, alignOffset: SIZE; adr, memHeaderAdr, memBlockAdr, memBlockHeadAdr: ADDRESS;
- memBlock {UNTRACED}: MemoryBlock; i: LONGINT; ch: CHAR; h: HUGEINT; size: LONGINT;
- initVal: LONGINT;
- BEGIN
- (*
- HeapBlockPtr -- bootHeapAdr
- 4 Type
- 8 Mark
- 12 DataAdr
- 16 Size
- 20 HeapBlockPtr
- 24 Type
- 28 next -- MemoryBlock
- 32 startAdr
- 36 size
- 40 beginBlockAdr
- 44 endBlockAdr
- 48 --beginBlockAdr
- ....
- --endBlockAdr
- *)
- size := 1;
- memDescSize := MemBlockHeaderSize + SIZEOF(MemoryBlockDesc);
- INC(memDescSize, (-memDescSize) MOD StaticBlockSize); (* round up to multiple of StaticBlockSize *)
- INC(size, (-size) MOD StaticBlockSize); (* round up to multiple of StaticBlockSize *)
- memBlkSize := memDescSize + size + StaticBlockSize; (* add StaticBlockSize to account for alignments different from multiples of StaticBlockSize *)
- IF memBlkSize < MemBlockSize THEN memBlkSize := MemBlockSize END; (* MemBlockSize implicitly multiple of StaticBlockSize *)
- initVal := 8*1024*1024;
- TRACE(initVal, adr);
- IF Unix.posix_memalign( adr, Unix.PageSize, initVal ) # 0 THEN
- Unix.Perror( "Machine.ExpandHeap: posix_memalign" );
- beginBlockAdr := 0;
- endBlockAdr := 0
- ELSE
- TRACE(adr, initVal);
- IF Unix.mprotect( adr, initVal, 7 (* READ WRITE EXEC *) ) # 0 THEN
- Unix.Perror( "Machine.ExpandHeap: mprotect" )
- END;
- TRACE(adr, initVal);
- END;
- (*
- adr := Kernel32.VirtualAlloc(initVal, memBlkSize, {Kernel32.MEMCommit, Kernel32.MEMReserve}, {Kernel32.PageExecuteReadWrite});
- IF adr = NilVal THEN (* allocation failed *)
- adr := Kernel32.VirtualAlloc(NilVal, memBlkSize, {Kernel32.MEMCommit}, {Kernel32.PageExecuteReadWrite});
- END;
- *)
- Trace.String("first heap block intVal "); Trace.Int(initVal,1); Trace.Ln;
- Trace.String("first heap block memBlkSize "); Trace.Int(memBlkSize,1); Trace.Ln;
- Trace.String("first heap block adr "); Trace.Int(adr,1); Trace.Ln;
- ASSERT(adr # 0);
- alignOffset := (-adr) MOD StaticBlockSize;
- memHeaderAdr := adr + alignOffset; (* force alignment of memory block start *)
- memBlockAdr := memHeaderAdr + MemBlockHeaderSize;
- memBlock := S.VAL(MemoryBlock, memBlockAdr);
- beginBlockAdr := memHeaderAdr + memDescSize;
- memBlock.next := NIL;
- memBlock.startAdr := adr;
- memBlock.size := memBlkSize;
- beginBlockAdr := memHeaderAdr + memDescSize;
- endBlockAdr := adr + memBlkSize - alignOffset;
- memBlock.beginBlockAdr := beginBlockAdr;
- memBlock.endBlockAdr := endBlockAdr;
- (* correct fields *)
- S.PUT(memBlockAdr + HeapBlockOffset, memHeaderAdr + BlockHeaderSize); (* set reference to header part of memory block correctly *)
- S.PUT(memBlockAdr + TypeDescOffset, 0); (* set type descriptor field of memory block to default value, memory blocks are not traced by GC *)
- S.PUT(memHeaderAdr + BlockHeaderSize + DataAdrOffset, memBlockAdr); (* set dataAdr of RecordBlockDesc to correct value *)
- S.PUT(memHeaderAdr + BlockHeaderSize + 2*AddressSize , memBlkSize);
- (* fill first heap block *)
- S.PUT(beginBlockAdr,0);
- S.PUT(beginBlockAdr+AddressSize,0);
- S.PUT(beginBlockAdr+2*AddressSize,0);
- S.PUT(beginBlockAdr+3*AddressSize,beginBlockAdr+7*AddressSize);
- S.PUT(beginBlockAdr+4*AddressSize,endBlockAdr-beginBlockAdr);
- S.PUT(beginBlockAdr+5*AddressSize,beginBlockAdr+2*AddressSize);
- S.PUT(beginBlockAdr+6*AddressSize,0);
- memoryBlock := memBlock;
-
- TRACE("InitHeap done");
- END InitHeap;
- (*
- PROCEDURE InitHeap;
- VAR heapAdr, firstBlock: ADDRESS; size: SIZE;
- BEGIN
- Unix.Dlsym( 0, "heapAdr", ADDRESSOF( heapAdr ) );
- Unix.Dlsym( 0, "heapSize", ADDRESSOF( size ) );
- firstBlock := heapAdr + ((-heapAdr - AddrSize) MOD BlockSize);
- size := heapAdr + size - BlockSize - firstBlock; DEC( size, size MOD BlockSize + BlockSize );
- firstMemBlock.next := NIL;
- firstMemBlock.startAdr := heapAdr;
- firstMemBlock.beginBlockAdr := firstBlock;
- firstMemBlock.endBlockAdr := firstBlock + size;
- firstMemBlock.size := size;
-
- memBlockHead := S.VAL( MemoryBlock, ADDRESSOF( firstMemBlock ) );
- memBlockTail := memBlockHead;
- END InitHeap;
- *)
- PROCEDURE InitConfig;
- VAR a: ADDRESS; i: LONGINT; c: CHAR;
- BEGIN
- a := Unix.getenv( ADDRESSOF( "AOSCONFIG" ) );
- IF a = 0 THEN config := DefaultConfig
- ELSE
- REPEAT
- S.GET( a, c ); INC( a ); config[i] := c; INC( i )
- UNTIL c = 0X
- END
- END InitConfig;
-
-
- PROCEDURE UpdateTicks*;
- BEGIN
- ticks := SHORT( (GetTimer() - timer0) DIV (mhz * 1000) );
- END UpdateTicks;
-
-
- PROCEDURE InitThreads;
- VAR res: BOOLEAN;
- BEGIN
- res := Unix.ThrInitialize( prioLow, prioHigh );
- IF ~res THEN
- Trace.StringLn( "Machine.InitThreads: no threads support in boot environment. teminating" );
- Unix.exit( 1 )
- END;
- IF Glue.debug # {} THEN
- Trace.String( "Threads initialized, priorities low, high: " );
- Trace.Int( prioLow, 0 ); Trace.String( ", " ); Trace.Int( prioHigh, 0 );
- Trace.Ln
- END
- END InitThreads;
-
- PROCEDURE CPUSpeed;
- VAR t0, t1: HUGEINT;
- BEGIN
- t0 := GetTimer(); Unix.ThrSleep( 100 ); t1 := GetTimer();
- mhz := (t1 - t0) DIV 100000;
- IF Glue.debug # {} THEN
- Trace.String( "CPU speed: ~" ); Trace.Int( SHORT( mhz ), 0); Trace.String( " MHz" ); Trace.Ln
- END
- END CPUSpeed;
-
- PROCEDURE Log( c: CHAR );
- VAR ignore: LONGINT;
- BEGIN
- ignore := Unix.write( 1, ADDRESSOF( c ), 1 );
- ignore := Unix.write( logfile, ADDRESSOF( c ), 1 );
- END Log;
-
- PROCEDURE LogFileOnly( c: CHAR );
- VAR ignore: LONGINT;
- BEGIN
- ignore := Unix.write( logfile, ADDRESSOF( c ), 1 );
- END LogFileOnly;
-
-
- PROCEDURE InitLog;
- VAR name, cmd: ARRAY 32 OF CHAR; pid, i: LONGINT;
- BEGIN
- name := "AOS.xxxxx.Log";
- pid := Unix.getpid(); i := 8;
- REPEAT
- name[i] := CHR( pid MOD 10 + ORD( '0' ) ); DEC( i );
- pid := pid DIV 10;
- UNTIL i = 3;
- logfile := Unix.open( ADDRESSOF( name ), Unix.rdwr + Unix.creat + Unix.trunc, Unix.rwrwr );
- IF Unix.argc > 2 THEN
- Unix.GetArgval( "-x", cmd );
- IF cmd # "" THEN SilentLog; standaloneAppl := TRUE
- ELSE VerboseLog
- END
- ELSE
- VerboseLog
- END
- END InitLog;
-
- PROCEDURE SilentLog*;
- BEGIN
- Trace.Char := LogFileOnly
- END SilentLog;
-
- PROCEDURE VerboseLog*;
- BEGIN
- Trace.Char := Log
- END VerboseLog;
-
- PROCEDURE Append( VAR a: ARRAY OF CHAR; CONST this: ARRAY OF CHAR );
- VAR i, j: LONGINT;
- BEGIN
- i := 0; j := 0;
- WHILE a[i] # 0X DO INC( i ) END;
- WHILE (i < LEN( a ) - 1) & (this[j] # 0X) DO a[i] := this[j]; INC( i ); INC( j ) END;
- a[i] := 0X
- END Append;
-
- PROCEDURE Init;
- VAR vendor: Vendor; ver: LONGINT;
- BEGIN
- TRACE("Machine Init Start");
- (*
- Unix.Dlsym( 0, "Unix.ThrInitialize", ADDRESSOF( Unix.ThrInitialize ) );
-
- Unix.Dlsym( 0, "Unix.MtxInit", ADDRESSOF( Unix.MtxInit ) );
- Unix.Dlsym( 0, "Unix.MtxDestroy", ADDRESSOF( Unix.MtxDestroy ) );
- Unix.Dlsym( 0, "Unix.MtxLock", ADDRESSOF( Unix.MtxLock ) );
- Unix.Dlsym( 0, "Unix.MtxUnlock", ADDRESSOF( Unix.MtxUnlock ) );
-
- Unix.Dlsym( 0, "conInit", ADDRESSOF( conInit ) );
- Unix.Dlsym( 0, "conDestroy", ADDRESSOF( conDestroy ) );
- Unix.Dlsym( 0, "conWait", ADDRESSOF( conWait ) );
- Unix.Dlsym( 0, "conSignal", ADDRESSOF( conSignal ) );
-
- Unix.Dlsym( 0, "thrSleep", ADDRESSOF( thrSleep ) );
- Unix.Dlsym( 0, "thrThis", ADDRESSOF( thrThis ) );
- *)
- standaloneAppl := FALSE;
-
- COPY( Unix.Version, version ); Append( version, Version );
- timer0 := GetTimer( ); ticks := 0;
- InitThreads;
- TRACE(0);
- InitLocks;
- TRACE(1);
- traceHeap := 1 IN Glue.debug;
- InitConfig;
- TRACE(2);
- InitLog;
- TRACE(3);
- CPUSpeed;
- TRACE(4);
- IF CpuIdSupported() THEN
- CPUID( vendor, ver, features, features2 ); SetupSSE2Ext
- END;
- TRACE(5);
- fcr := (FCR() - {0,2,3,10,11}) + {0..5,8,9}; (* default FCR RC=00B *)
- TRACE("Machine Init End");
- END Init;
- PROCEDURE {INITIAL} Init0;
- BEGIN
- Init;
- END Init0;
-
- END Machine.
- (*
- 03.03.1998 pjm First version
- 30.06.1999 pjm ProcessorID moved to AosProcessor
- *)
- (**
- Notes
- This module defines an interface to the boot environment of the system. The facilities provided here are only intended for the lowest levels of the system, and should never be directly imported by user modules (exceptions are noted below). They are highly specific to the system hardware and firmware architecture.
- Typically a machine has some type of firmware that performs initial testing and setup of the system. The firmware initiates the operating system bootstrap loader, which loads the boot file. This module is the first module in the statically linked boot file that gets control.
- There are two more-or-less general procedures in this module: GetConfig and StrToInt. GetConfig is used to query low-level system settings, e.g., the location of the boot file system. StrToInt is a utility procedure that parses numeric strings.
- Config strings:
- ExtMemSize Specifies size of extended memory (above 1MB) in MB. This value is not checked for validity. Setting it false may cause the system to fail, possible after running for some time. The memory size is usually detected automatically, but if the detection does not work for some reason, or if you want to limit the amount of memory detected, this string can be set. For example, if the machine has 64MB of memory, this value can be set as ExtMemSize="63".
- *)
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