Generic.Unix.I386.Machine.Mod 26 KB

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  1. MODULE Machine; (** AUTHOR "pjm, G.F."; PURPOSE "Bootstrapping, configuration and machine interface"; *)
  2. IMPORT S := SYSTEM, Trace, Unix, Glue;
  3. CONST
  4. DefaultConfig = "Color 0 StackSize 128";
  5. Version = "A2 Generic, ";
  6. DefaultObjectFileExtension* = ".GofU";
  7. Second* = 1000; (* frequency of ticks increments in Hz *)
  8. (** bits in features variable *)
  9. MTTR* = 12; MMX* = 23;
  10. AddrSize = SIZEOF( ADDRESS );
  11. SizeSize = SIZEOF( SIZE );
  12. AddressSize = SIZEOF(ADDRESS);
  13. BlockHeaderSize = 2 * AddressSize;
  14. RecordDescSize = 4 * AddressSize; (* needs to be adapted in case Heaps.RecordBlockDesc is changed *)
  15. StaticBlockSize = 32; (* static heap block size *)
  16. BlockSize = 32;
  17. MemBlockSize* = 64*1024*1024;
  18. TraceOutput* = 0; (* Trace output *)
  19. Memory* = 1; (*! Virtual memory management, stack and page allocation, not used in UnixAos *)
  20. Heaps* = 2; (* Storage allocation and Garbage collection *)
  21. Interrupts* = 3; (*! Interrupt handling, not used in UnixAos *)
  22. Modules* = 4; (* Module list *)
  23. Objects* = 5; (*! Ready queue, not used in UnixAos *)
  24. Processors* = 6; (*! Interprocessor interrupts, not used in UnixAos *)
  25. KernelLog* = 7; (* Atomic output *)
  26. X11* = 8; (* XWindows I/O *)
  27. MaxLocks* = 9; (* { <= 32 } *)
  28. MaxCPU* = 4;
  29. IsCooperative* = FALSE;
  30. TraceMemBlocks = FALSE;
  31. TYPE
  32. Vendor* = ARRAY 13 OF CHAR;
  33. MemoryBlock* = POINTER TO MemoryBlockDesc;
  34. MemoryBlockDesc* = RECORD
  35. next- {UNTRACED}: MemoryBlock;
  36. startAdr-: ADDRESS; (* sort key in linked list of memory blocks *)
  37. size-: SIZE;
  38. beginBlockAdr-, endBlockAdr-: ADDRESS
  39. END;
  40. (** processor state *)
  41. State* = RECORD
  42. PC*, BP*, SP*: ADDRESS
  43. END;
  44. VAR
  45. mtx : ARRAY MaxLocks OF Unix.Mutex_t;
  46. version-: ARRAY 64 OF CHAR; (** Aos version *)
  47. features-, features2 : SET;
  48. MMXSupport- : BOOLEAN;
  49. SSESupport- : BOOLEAN;
  50. SSE2Support- : BOOLEAN;
  51. SSE3Support- : BOOLEAN;
  52. SSSE3Support- : BOOLEAN;
  53. SSE41Support- : BOOLEAN;
  54. SSE42Support- : BOOLEAN;
  55. SSE5Support- : BOOLEAN;
  56. AVXSupport- : BOOLEAN;
  57. ticks-: LONGINT; (** timer ticks. Use Kernel.GetTicks() to read, don't write *)
  58. prioLow-, prioHigh-: LONGINT; (* permitted thread priorities *)
  59. fcr-: SET; (** default floating-point control register value (default rounding mode is towards -infinity, for ENTIER) *)
  60. mhz-: HUGEINT; (** clock rate of GetTimer in MHz, or 0 if not known *)
  61. gcThreshold-: SIZE;
  62. memBlockHead-{UNTRACED}, memBlockTail-{UNTRACED}: MemoryBlock; (* head and tail of sorted list of memory blocks *)
  63. config: ARRAY 2048 OF CHAR; (* config strings *)
  64. logname: ARRAY 32 OF CHAR;
  65. logfile: LONGINT;
  66. traceHeap: BOOLEAN;
  67. timer0 : HUGEINT;
  68. (** Return current processor ID (0 to MaxNum-1). *)
  69. PROCEDURE ID* (): LONGINT;
  70. BEGIN
  71. RETURN 0
  72. END ID;
  73. (**
  74. * Flush Data Cache for the specified virtual address range. If len is negative, flushes the whole cache.
  75. * This is used on some architecture to interact with DMA hardware (e.g. Ethernet and USB. It can be
  76. * left empty on Intel architecture.
  77. *)
  78. PROCEDURE FlushDCacheRange * (adr: ADDRESS; len: LONGINT);
  79. END FlushDCacheRange;
  80. (**
  81. * Invalidate Data Cache for the specified virtual address range. If len is negative, flushes the whole cache.
  82. * This is used on some architecture to interact with DMA hardware (e.g. Ethernet and USB. It can be
  83. * left empty on Intel architecture.
  84. *)
  85. PROCEDURE InvalidateDCacheRange * (adr: ADDRESS; len: LONGINT);
  86. END InvalidateDCacheRange;
  87. (**
  88. * Invalidate Instruction Cache for the specified virtual address range. If len is negative, flushes the whole cache.
  89. * This is used on some architecture to interact with DMA hardware (e.g. Ethernet and USB. It can be
  90. * left empty on Intel architecture.
  91. *)
  92. PROCEDURE InvalidateICacheRange * (adr: ADDRESS; len: LONGINT);
  93. END InvalidateICacheRange;
  94. (* insert given memory block in sorted list of memory blocks, sort key is startAdr field - called during GC *)
  95. PROCEDURE InsertMemoryBlock(memBlock: MemoryBlock);
  96. VAR cur {UNTRACED}, prev {UNTRACED}: MemoryBlock;
  97. BEGIN
  98. cur := memBlockHead;
  99. prev := NIL;
  100. WHILE (cur # NIL) & (cur.startAdr < memBlock.startAdr) DO
  101. prev := cur;
  102. cur := cur.next
  103. END;
  104. IF prev = NIL THEN (* insert at head of list *)
  105. memBlock.next := memBlockHead;
  106. memBlockHead := memBlock
  107. ELSE (* insert in middle or at end of list *)
  108. prev.next := memBlock;
  109. memBlock.next := cur;
  110. IF cur = NIL THEN
  111. memBlockTail := memBlock
  112. END
  113. END
  114. END InsertMemoryBlock;
  115. (* Free unused memory block - called during GC *)
  116. PROCEDURE FreeMemBlock*(memBlock: MemoryBlock);
  117. VAR cur {UNTRACED}, prev {UNTRACED}: MemoryBlock;
  118. BEGIN
  119. cur := memBlockHead;
  120. prev := NIL;
  121. WHILE (cur # NIL) & (cur # memBlock) DO
  122. prev := cur;
  123. cur := cur.next
  124. END;
  125. IF cur = memBlock THEN
  126. IF traceHeap THEN
  127. Trace.String( "Release memory block " ); Trace.Hex( memBlock.startAdr, -8 ); Trace.Ln
  128. END;
  129. IF prev = NIL THEN
  130. memBlockHead := cur.next
  131. ELSE
  132. prev.next := cur.next;
  133. IF cur.next = NIL THEN
  134. memBlockTail := prev
  135. END
  136. END;
  137. Unix.free( memBlock.startAdr )
  138. ELSE
  139. HALT(535) (* error in memory block management *)
  140. END;
  141. END FreeMemBlock;
  142. (* expand heap by allocating a new memory block *)
  143. PROCEDURE ExpandHeap*( dummy: LONGINT; size: SIZE; VAR memoryBlock: MemoryBlock; VAR beginBlockAdr, endBlockAdr: ADDRESS );
  144. VAR mBlock: MemoryBlock; alloc, s: SIZE; a, adr: ADDRESS;
  145. BEGIN
  146. IF size < (MemBlockSize - (2*BlockSize)) THEN alloc := MemBlockSize
  147. ELSE alloc := size + (2*BlockSize);
  148. END;
  149. INC( alloc, (-alloc) MOD Unix.PageSize );
  150. IF Unix.posix_memalign( adr, Unix.PageSize, alloc ) # 0 THEN
  151. Unix.Perror( "Machine.ExpandHeap: posix_memalign" );
  152. beginBlockAdr := 0;
  153. endBlockAdr := 0
  154. ELSE
  155. IF Unix.mprotect( adr, alloc, 7 (* READ WRITE EXEC *) ) # 0 THEN
  156. Unix.Perror( "Machine.ExpandHeap: mprotect" )
  157. END;
  158. mBlock := S.VAL( MemoryBlock, adr );
  159. mBlock.next := NIL;
  160. mBlock.startAdr := adr;
  161. mBlock.size := alloc;
  162. mBlock.beginBlockAdr := adr + BlockSize - AddrSize;
  163. ASSERT( (mBlock.beginBlockAdr + AddrSize) MOD BlockSize = 0 );
  164. s := adr + alloc - mBlock.beginBlockAdr - BlockSize;
  165. DEC( s, s MOD BlockSize );
  166. ASSERT( s >= size );
  167. mBlock.endBlockAdr := mBlock.beginBlockAdr + s;
  168. InsertMemoryBlock( mBlock );
  169. IF traceHeap THEN TraceHeap( mBlock ) END;
  170. a := mBlock.beginBlockAdr;
  171. S.PUT( a, a + AddrSize ); (* tag *)
  172. S.PUT( a + AddrSize, s - AddrSize ); (* size *)
  173. S.PUT( a + AddrSize + SizeSize, S.VAL( ADDRESS, 0 ) ); (* next *)
  174. beginBlockAdr := mBlock.beginBlockAdr;
  175. endBlockAdr := mBlock.endBlockAdr;
  176. memoryBlock := mBlock;
  177. END
  178. END ExpandHeap;
  179. (* Set memory block end address *)
  180. PROCEDURE SetMemoryBlockEndAddress*(memBlock: MemoryBlock; endBlockAdr: ADDRESS);
  181. BEGIN
  182. ASSERT(endBlockAdr >= memBlock.beginBlockAdr);
  183. memBlock.endBlockAdr := endBlockAdr
  184. END SetMemoryBlockEndAddress;
  185. PROCEDURE TraceHeap( new: MemoryBlock );
  186. VAR cur{UNTRACED}: MemoryBlock;
  187. BEGIN
  188. Trace.Ln;
  189. Trace.String( "Heap expanded" ); Trace.Ln;
  190. Trace.String("Static Heap: "); Trace.Hex(Glue.baseAdr, -8); Trace.String(" - "); Trace.Hex(Glue.endAdr, -8);
  191. Trace.Ln;
  192. cur := memBlockHead;
  193. WHILE cur # NIL DO
  194. Trace.Hex( cur.startAdr, -8 ); Trace.String( " " ); Trace.Hex( cur.startAdr + cur.size, -8 );
  195. IF cur = new THEN Trace.String( " (new)" ) END;
  196. Trace.Ln;
  197. cur := cur.next
  198. END
  199. END TraceHeap;
  200. (** Get first memory block and first free address, the first free address is identical to memBlockHead.endBlockAdr *)
  201. PROCEDURE GetStaticHeap*(VAR beginBlockAdr, endBlockAdr, freeBlockAdr: ADDRESS);
  202. BEGIN
  203. InitHeap(memBlockHead,beginBlockAdr, endBlockAdr);
  204. memBlockTail := memBlockHead;
  205. beginBlockAdr := memBlockHead.beginBlockAdr;
  206. endBlockAdr := memBlockHead.endBlockAdr;
  207. freeBlockAdr := beginBlockAdr;
  208. END GetStaticHeap;
  209. VAR Last: RECORD END; (* linked to the end *)
  210. (* returns if an address is a currently allocated heap address *)
  211. PROCEDURE ValidHeapAddress*( p: ADDRESS ): BOOLEAN;
  212. VAR mb: MemoryBlock;
  213. BEGIN
  214. IF (p>=Glue.baseAdr) & (p<=Glue.endAdr) THEN RETURN TRUE END;
  215. mb := memBlockHead;
  216. WHILE mb # NIL DO
  217. IF (p >= mb.beginBlockAdr) & (p <= mb.endBlockAdr) THEN RETURN TRUE END;
  218. mb := mb.next;
  219. END;
  220. RETURN FALSE;
  221. END ValidHeapAddress;
  222. (** Return information on free memory in Kbytes. *)
  223. PROCEDURE GetFreeK*(VAR total, lowFree, highFree: SIZE);
  224. BEGIN
  225. (*! meaningless in Unix port, for interface compatibility only *)
  226. total := 0;
  227. lowFree := 0;
  228. highFree := 0
  229. END GetFreeK;
  230. (** Fill "size" bytes at "destAdr" with "filler". "size" must be multiple of 4. *)
  231. PROCEDURE Fill32* (destAdr: ADDRESS; size: SIZE; filler: LONGINT);
  232. CODE {SYSTEM.i386}
  233. MOV EDI, [EBP+destAdr]
  234. MOV ECX, [EBP+size]
  235. MOV EAX, [EBP+filler]
  236. TEST ECX, 3
  237. JZ ok
  238. PUSH 8 ; ASSERT failure
  239. INT 3
  240. ok:
  241. SHR ECX, 2
  242. CLD
  243. REP STOSD
  244. END Fill32;
  245. PROCEDURE Portin8*(port: LONGINT; VAR val: CHAR);
  246. END Portin8;
  247. PROCEDURE Portin16*(port: LONGINT; VAR val: INTEGER);
  248. END Portin16;
  249. PROCEDURE Portin32*(port: LONGINT; VAR val: LONGINT);
  250. END Portin32;
  251. PROCEDURE Portout8*(port: LONGINT; val: CHAR);
  252. END Portout8;
  253. PROCEDURE Portout16*(port: LONGINT; val: INTEGER);
  254. END Portout16;
  255. PROCEDURE Portout32*(port: LONGINT; val: LONGINT);
  256. END Portout32;
  257. (** -- Atomic operations -- *)
  258. (** Atomic INC(x). *)
  259. PROCEDURE -AtomicInc*(VAR x: LONGINT);
  260. CODE {SYSTEM.i386}
  261. POP EAX
  262. LOCK
  263. INC DWORD [EAX]
  264. END AtomicInc;
  265. (** Atomic DEC(x). *)
  266. PROCEDURE -AtomicDec*(VAR x: LONGINT);
  267. CODE {SYSTEM.i386}
  268. POP EAX
  269. LOCK
  270. DEC DWORD [EAX]
  271. END AtomicDec;
  272. (** Atomic INC(x, y). *)
  273. PROCEDURE -AtomicAdd*(VAR x: LONGINT; y: LONGINT);
  274. CODE {SYSTEM.i386}
  275. POP EBX
  276. POP EAX
  277. LOCK
  278. ADD DWORD [EAX], EBX
  279. END AtomicAdd;
  280. (** Atomic EXCL. *)
  281. PROCEDURE AtomicExcl* (VAR s: SET; bit: LONGINT);
  282. CODE {SYSTEM.i386}
  283. MOV EAX, [EBP+bit]
  284. MOV EBX, [EBP+s]
  285. LOCK
  286. BTR [EBX], EAX
  287. END AtomicExcl;
  288. (** Atomic test-and-set. Set x = TRUE and return old value of x. *)
  289. PROCEDURE -AtomicTestSet*(VAR x: BOOLEAN): BOOLEAN;
  290. CODE {SYSTEM.i386}
  291. POP EBX
  292. MOV AL, 1
  293. XCHG [EBX], AL
  294. END AtomicTestSet;
  295. (* Atomic compare-and-swap. Set x = new if x = old and return old value of x *)
  296. PROCEDURE -AtomicCAS* (VAR x: LONGINT; old, new: LONGINT): LONGINT;
  297. CODE {SYSTEM.i386}
  298. POP EBX ; new
  299. POP EAX ; old
  300. POP ECX ; address of x
  301. DB 0F0X, 00FX, 0B1X, 019X ; LOCK CMPXCHG [ECX], EBX; atomicly compare x with old and set it to new if equal
  302. END AtomicCAS;
  303. (* Return current instruction pointer *)
  304. PROCEDURE CurrentPC* (): ADDRESS;
  305. CODE {SYSTEM.i386}
  306. MOV EAX, [EBP+4]
  307. END CurrentPC;
  308. (* Return current frame pointer *)
  309. PROCEDURE -CurrentBP* (): ADDRESS;
  310. CODE {SYSTEM.i386}
  311. MOV EAX, EBP
  312. END CurrentBP;
  313. (* Set current frame pointer *)
  314. PROCEDURE -SetBP* (bp: ADDRESS);
  315. CODE {SYSTEM.i386}
  316. POP EBP
  317. END SetBP;
  318. (* Return current stack pointer *)
  319. PROCEDURE -CurrentSP* (): ADDRESS;
  320. CODE {SYSTEM.i386}
  321. MOV EAX, ESP
  322. END CurrentSP;
  323. (* Set current stack pointer *)
  324. PROCEDURE -SetSP* (sp: ADDRESS);
  325. CODE {SYSTEM.i386}
  326. POP ESP
  327. END SetSP;
  328. PROCEDURE -GetEAX*(): LONGINT;
  329. CODE{SYSTEM.i386}
  330. END GetEAX;
  331. PROCEDURE -GetECX*(): LONGINT;
  332. CODE{SYSTEM.i386}
  333. MOV EAX,ECX
  334. END GetECX;
  335. PROCEDURE -GetESI*(): LONGINT;
  336. CODE{SYSTEM.i386}
  337. MOV EAX,ESI
  338. END GetESI;
  339. PROCEDURE -GetEDI*(): LONGINT;
  340. CODE{SYSTEM.i386}
  341. MOV EAX,EDI
  342. END GetEDI;
  343. PROCEDURE -SetEAX*(n: LONGINT);
  344. CODE{SYSTEM.i386}
  345. POP EAX
  346. END SetEAX;
  347. PROCEDURE -SetEBX*(n: LONGINT);
  348. CODE{SYSTEM.i386}
  349. POP EBX
  350. END SetEBX;
  351. PROCEDURE -SetECX*(n: LONGINT);
  352. CODE{SYSTEM.i386}
  353. POP ECX
  354. END SetECX;
  355. PROCEDURE -SetEDX*(n: LONGINT);
  356. CODE{SYSTEM.i386}
  357. POP EDX
  358. END SetEDX;
  359. PROCEDURE -SetESI*(n: LONGINT);
  360. CODE{SYSTEM.i386}
  361. POP ESI
  362. END SetESI;
  363. PROCEDURE -SetEDI*(n: LONGINT);
  364. CODE{SYSTEM.i386}
  365. POP EDI
  366. END SetEDI;
  367. PROCEDURE -GetTimer* (): HUGEINT;
  368. CODE {SYSTEM.Pentium}
  369. RDTSC ; set EDX:EAX
  370. END GetTimer;
  371. (** -- Configuration and bootstrapping -- *)
  372. (** 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. *)
  373. PROCEDURE GetConfig* (CONST name: ARRAY OF CHAR; VAR val: ARRAY OF CHAR);
  374. VAR i, src: LONGINT; ch: CHAR;
  375. BEGIN
  376. ASSERT (name[0] # "="); (* no longer supported, use GetInit instead *)
  377. src := -1; val := "";
  378. LOOP
  379. REPEAT
  380. INC( src ); ch := config[src];
  381. IF ch = 0X THEN EXIT END;
  382. UNTIL ch > ' ';
  383. i := 0;
  384. LOOP
  385. ch := config[src];
  386. IF (ch # name[i]) OR (name[i] = 0X) THEN EXIT END;
  387. INC (i); INC (src)
  388. END;
  389. IF (ch <= ' ') & (name[i] = 0X) THEN (* found *)
  390. i := 0;
  391. REPEAT
  392. INC (src); ch := config[src]; val[i] := ch; INC (i);
  393. IF i = LEN(val) THEN val[i - 1] := 0X; RETURN END (* val too short *)
  394. UNTIL ch <= ' ';
  395. IF ch = ' ' THEN val[i -1] := 0X END;
  396. RETURN
  397. ELSE
  398. WHILE ch > ' ' DO (* skip to end of name *)
  399. INC (src); ch := config[src]
  400. END;
  401. INC (src);
  402. REPEAT (* skip to end of value *)
  403. ch := config[src]; INC (src)
  404. UNTIL ch <= ' '
  405. END
  406. END;
  407. IF (name = "ObjectFileExtension") & (val = "") THEN
  408. val := DefaultObjectFileExtension
  409. END;
  410. END GetConfig;
  411. (** 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. *)
  412. PROCEDURE StrToInt* (VAR i: LONGINT; CONST s: ARRAY OF CHAR): LONGINT;
  413. VAR vd, vh, sgn, d: LONGINT; hex: BOOLEAN;
  414. BEGIN
  415. vd := 0; vh := 0; hex := FALSE;
  416. IF s[i] = "-" THEN sgn := -1; INC (i) ELSE sgn := 1 END;
  417. LOOP
  418. IF (s[i] >= "0") & (s[i] <= "9") THEN d := ORD (s[i])-ORD ("0")
  419. ELSIF (CAP (s[i]) >= "A") & (CAP (s[i]) <= "F") THEN d := ORD (CAP (s[i]))-ORD ("A") + 10; hex := TRUE
  420. ELSE EXIT
  421. END;
  422. vd := 10*vd + d; vh := 16*vh + d;
  423. INC (i)
  424. END;
  425. IF CAP (s[i]) = "H" THEN hex := TRUE; INC (i) END; (* optional H *)
  426. IF hex THEN vd := vh END;
  427. RETURN sgn * vd
  428. END StrToInt;
  429. (* function returning the number of processors that are available to Aos *)
  430. PROCEDURE NumberOfProcessors*( ): LONGINT;
  431. VAR res: LONGINT;
  432. BEGIN
  433. res := Unix.getnprocs();
  434. RETURN res;
  435. END NumberOfProcessors;
  436. (*! non portable code, for native Aos only *)
  437. PROCEDURE SetNumberOfProcessors*( num: LONGINT );
  438. BEGIN
  439. (* numberOfProcessors := num; *)
  440. END SetNumberOfProcessors;
  441. (* function for changing byte order *)
  442. PROCEDURE ChangeByteOrder* (n: LONGINT): LONGINT;
  443. CODE { SYSTEM.i486 }
  444. MOV EAX, [EBP+n] ; load n in eax
  445. BSWAP EAX ; swap byte order
  446. END ChangeByteOrder;
  447. (* Send and print character *)
  448. PROCEDURE TraceChar *(c: CHAR);
  449. BEGIN
  450. Trace.Char( c )
  451. END TraceChar;
  452. (** CPU identification *)
  453. PROCEDURE CPUID*( VAR vendor: Vendor; VAR version: LONGINT; VAR features1,features2: SET );
  454. CODE {SYSTEM.i386, SYSTEM.Pentium}
  455. MOV EAX, 0
  456. CPUID
  457. CMP EAX, 0
  458. JNE ok
  459. MOV ESI, [EBP+vendor]
  460. MOV [ESI], AL ; AL = 0
  461. MOV ESI, [EBP+version]
  462. MOV [ESI], EAX ; EAX = 0
  463. MOV ESI, [EBP+features1]
  464. MOV [ESI], EAX
  465. MOV ESI, [EBP+features2]
  466. MOV [ESI], EAX
  467. JMP end
  468. ok:
  469. MOV ESI, [EBP+vendor]
  470. MOV [ESI], EBX
  471. MOV [ESI+4], EDX
  472. MOV [ESI+8], ECX
  473. MOV BYTE [ESI+12], 0
  474. MOV EAX, 1
  475. CPUID
  476. MOV ESI, [EBP+version]
  477. MOV [ESI], EAX
  478. MOV ESI, [EBP+features1]
  479. MOV [ESI], EDX
  480. MOV ESI, [EBP+features2]
  481. MOV [ESI], ECX
  482. end:
  483. END CPUID;
  484. (* If the CPUID instruction is supported, the ID flag (bit 21) of the EFLAGS register is r/w *)
  485. PROCEDURE CpuIdSupported( ) : BOOLEAN;
  486. CODE {SYSTEM.i386}
  487. PUSHFD ; save EFLAGS
  488. POP EAX ; store EFLAGS in EAX
  489. MOV EBX, EAX ; save EBX for later testing
  490. XOR EAX, 00200000H ; toggle bit 21
  491. PUSH EAX ; push to stack
  492. POPFD ; save changed EAX to EFLAGS
  493. PUSHFD ; push EFLAGS to TOS
  494. POP EAX ; store EFLAGS in EAX
  495. CMP EAX, EBX ; see if bit 21 has changed
  496. SETNE AL; ; return TRUE if bit 21 has changed, FALSE otherwise
  497. END CpuIdSupported;
  498. (* setup MMX, SSE and SSE2..SSE5 and AVX extension *)
  499. PROCEDURE SetupSSE2Ext;
  500. CONST
  501. MMXFlag=23;(*IN features from EBX*)
  502. FXSRFlag = 24;
  503. SSEFlag = 25;
  504. SSE2Flag = 26;
  505. SSE3Flag = 0; (*IN features2 from ECX*) (*PH 04/11*)
  506. SSSE3Flag =9;
  507. SSE41Flag =19;
  508. SSE42Flag =20;
  509. SSE5Flag = 11;
  510. AVXFlag = 28;
  511. BEGIN
  512. MMXSupport := MMXFlag IN features;
  513. SSESupport := SSEFlag IN features;
  514. SSE2Support := SSESupport & (SSE2Flag IN features);
  515. SSE3Support := SSE2Support & (SSE3Flag IN features2);
  516. SSSE3Support := SSE3Support & (SSSE3Flag IN features2); (* PH 04/11*)
  517. SSE41Support := SSE3Support & (SSE41Flag IN features2);
  518. SSE42Support := SSE3Support & (SSE42Flag IN features2);
  519. SSE5Support := SSE3Support & (SSE5Flag IN features2);
  520. AVXSupport := SSE3Support & (AVXFlag IN features2);
  521. IF SSESupport & (FXSRFlag IN features) THEN
  522. (* InitSSE(); *) (*! not privileged mode in Windows and Unix, not allowed *)
  523. END;
  524. END SetupSSE2Ext;
  525. (** -- Processor initialization -- *)
  526. PROCEDURE -SetFCR( s: SET );
  527. CODE {SYSTEM.i386, SYSTEM.FPU}
  528. FLDCW [ESP] ; parameter s
  529. POP EAX
  530. END SetFCR;
  531. PROCEDURE -FCR( ): SET;
  532. CODE {SYSTEM.i386, SYSTEM.FPU}
  533. PUSH 0
  534. FNSTCW [ESP]
  535. FWAIT
  536. POP EAX
  537. END FCR;
  538. PROCEDURE -InitFPU;
  539. CODE {SYSTEM.i386, SYSTEM.FPU}
  540. FNINIT
  541. END InitFPU;
  542. (** Setup FPU control word of current processor. *)
  543. PROCEDURE SetupFPU*;
  544. BEGIN
  545. InitFPU; SetFCR( fcr )
  546. END SetupFPU;
  547. (* Initialize locks. *)
  548. PROCEDURE InitLocks;
  549. VAR i: LONGINT;
  550. BEGIN
  551. i := 0;
  552. WHILE i < MaxLocks DO mtx[i] := Unix.NewMtx( ); INC( i ) END;
  553. END InitLocks;
  554. PROCEDURE CleanupLocks*;
  555. VAR i: LONGINT;
  556. BEGIN
  557. i := 0;
  558. WHILE i < MaxLocks DO Unix.MtxDestroy( mtx[i] ); INC( i ) END;
  559. END CleanupLocks;
  560. (** Acquire a spin-lock. *)
  561. PROCEDURE Acquire*( level: LONGINT ); (* non reentrant lock *)
  562. BEGIN
  563. Unix.MtxLock( mtx[level] );
  564. END Acquire;
  565. (** Release a spin-lock. *)
  566. PROCEDURE Release*( level: LONGINT );
  567. BEGIN
  568. Unix.MtxUnlock( mtx[level] );
  569. END Release;
  570. PROCEDURE Shutdown*( reboot: BOOLEAN );
  571. VAR r: LONGINT; logstat: Unix.Status;
  572. BEGIN
  573. r := Unix.fstat( logfile, logstat );
  574. r := Unix.close( logfile );
  575. IF logstat.size = 0 THEN r := Unix.unlink( ADDRESSOF( logname) ) END;
  576. IF reboot THEN Unix.exit( 0 ) ELSE Unix.exit( 1 ) END;
  577. END Shutdown;
  578. (* Set machine-dependent parameter gcThreshold *)
  579. PROCEDURE SetGCParams*;
  580. BEGIN
  581. gcThreshold := 10*1024*1024; (* 10 MB *)
  582. END SetGCParams;
  583. (* expand heap by allocating a new memory block - called during GC *)
  584. PROCEDURE InitHeap(VAR memoryBlock: MemoryBlock; VAR beginBlockAdr, endBlockAdr: ADDRESS);
  585. CONST MemBlockHeaderSize = BlockHeaderSize + RecordDescSize + BlockHeaderSize;
  586. TypeDescOffset = -AddressSize; (* see Heaps.Mod *)
  587. HeapBlockOffset = - 2 * AddressSize; (* see Heaps.Mod *)
  588. DataAdrOffset = AddressSize; (* offset of dataAdr field in Heaps.HeapBlockDesc *)
  589. VAR memDescSize, memBlkSize, alignOffset: SIZE; adr, memHeaderAdr, memBlockAdr: ADDRESS;
  590. memBlock {UNTRACED}: MemoryBlock; size: LONGINT;
  591. initVal: LONGINT;
  592. BEGIN
  593. (*
  594. HeapBlockPtr -- bootHeapAdr
  595. 4 Type
  596. 8 Mark
  597. 12 DataAdr
  598. 16 Size
  599. 20 HeapBlockPtr
  600. 24 Type
  601. 28 next -- MemoryBlock
  602. 32 startAdr
  603. 36 size
  604. 40 beginBlockAdr
  605. 44 endBlockAdr
  606. 48 --beginBlockAdr
  607. ....
  608. --endBlockAdr
  609. *)
  610. size := 1;
  611. memDescSize := MemBlockHeaderSize + SIZEOF(MemoryBlockDesc);
  612. INC(memDescSize, (-memDescSize) MOD StaticBlockSize); (* round up to multiple of StaticBlockSize *)
  613. INC(size, (-size) MOD StaticBlockSize); (* round up to multiple of StaticBlockSize *)
  614. memBlkSize := memDescSize + size + StaticBlockSize; (* add StaticBlockSize to account for alignments different from multiples of StaticBlockSize *)
  615. IF memBlkSize < MemBlockSize THEN memBlkSize := MemBlockSize END; (* MemBlockSize implicitly multiple of StaticBlockSize *)
  616. IF Unix.posix_memalign( adr, Unix.PageSize, memBlkSize ) # 0 THEN
  617. Unix.Perror( "Machine.ExpandHeap: posix_memalign" );
  618. beginBlockAdr := 0;
  619. endBlockAdr := 0
  620. ELSE
  621. IF Unix.mprotect( adr, memBlkSize, 7 (* READ WRITE EXEC *) ) # 0 THEN
  622. Unix.Perror( "Machine.ExpandHeap: mprotect" )
  623. END;
  624. IF TraceMemBlocks THEN TRACE(adr, memBlkSize) END;
  625. END;
  626. IF TraceMemBlocks THEN
  627. Trace.String("first heap block intVal "); Trace.Int(initVal,1); Trace.Ln;
  628. Trace.String("first heap block memBlkSize "); Trace.Int(memBlkSize,1); Trace.Ln;
  629. Trace.String("first heap block adr "); Trace.Int(adr,1); Trace.Ln;
  630. END;
  631. ASSERT(adr # 0);
  632. alignOffset := (-adr) MOD StaticBlockSize;
  633. memHeaderAdr := adr + alignOffset; (* force alignment of memory block start *)
  634. memBlockAdr := memHeaderAdr + MemBlockHeaderSize;
  635. memBlock := S.VAL(MemoryBlock, memBlockAdr);
  636. beginBlockAdr := memHeaderAdr + memDescSize;
  637. memBlock.next := NIL;
  638. memBlock.startAdr := adr;
  639. memBlock.size := memBlkSize;
  640. beginBlockAdr := memHeaderAdr + memDescSize;
  641. endBlockAdr := adr + memBlkSize - alignOffset;
  642. memBlock.beginBlockAdr := beginBlockAdr;
  643. memBlock.endBlockAdr := endBlockAdr;
  644. (* correct fields *)
  645. S.PUT(memBlockAdr + HeapBlockOffset, memHeaderAdr + BlockHeaderSize); (* set reference to header part of memory block correctly *)
  646. S.PUT(memBlockAdr + TypeDescOffset, 0); (* set type descriptor field of memory block to default value, memory blocks are not traced by GC *)
  647. S.PUT(memHeaderAdr + BlockHeaderSize + DataAdrOffset, memBlockAdr); (* set dataAdr of RecordBlockDesc to correct value *)
  648. S.PUT(memHeaderAdr + BlockHeaderSize + 2*AddressSize , memBlkSize);
  649. (* fill first heap block *)
  650. S.PUT(beginBlockAdr,0);
  651. S.PUT(beginBlockAdr+AddressSize,0);
  652. S.PUT(beginBlockAdr+2*AddressSize,0);
  653. S.PUT(beginBlockAdr+3*AddressSize,beginBlockAdr+7*AddressSize);
  654. S.PUT(beginBlockAdr+4*AddressSize,endBlockAdr-beginBlockAdr);
  655. S.PUT(beginBlockAdr+5*AddressSize,beginBlockAdr+2*AddressSize);
  656. S.PUT(beginBlockAdr+6*AddressSize,0);
  657. memoryBlock := memBlock;
  658. END InitHeap;
  659. PROCEDURE InitConfig;
  660. VAR a: ADDRESS; i: LONGINT; c: CHAR;
  661. BEGIN
  662. a := Unix.getenv( ADDRESSOF( "AOSCONFIG" ) );
  663. IF a = 0 THEN config := DefaultConfig
  664. ELSE
  665. REPEAT
  666. S.GET( a, c ); INC( a ); config[i] := c; INC( i )
  667. UNTIL c = 0X
  668. END
  669. END InitConfig;
  670. PROCEDURE UpdateTicks*;
  671. BEGIN
  672. ticks := SHORT( (GetTimer() - timer0) DIV (mhz * 1000) );
  673. END UpdateTicks;
  674. PROCEDURE InitThreads;
  675. VAR res: BOOLEAN;
  676. BEGIN
  677. res := Unix.ThrInitialize( prioLow, prioHigh );
  678. IF ~res THEN
  679. Trace.StringLn( "Machine.InitThreads: no threads support in boot environment. teminating" );
  680. Unix.exit( 1 )
  681. END;
  682. IF Glue.debug # {} THEN
  683. Trace.String( "Threads initialized, priorities low, high: " );
  684. Trace.Int( prioLow, 0 ); Trace.String( ", " ); Trace.Int( prioHigh, 0 );
  685. Trace.Ln
  686. END
  687. END InitThreads;
  688. PROCEDURE CPUSpeed;
  689. VAR t0, t1: HUGEINT;
  690. BEGIN
  691. t0 := GetTimer(); Unix.ThrSleep( 100 ); t1 := GetTimer();
  692. mhz := (t1 - t0) DIV 100000;
  693. IF Glue.debug # {} THEN
  694. Trace.String( "CPU speed: ~" ); Trace.Int( SHORT( mhz ), 0); Trace.String( " MHz" ); Trace.Ln
  695. END
  696. END CPUSpeed;
  697. PROCEDURE Log( c: CHAR );
  698. VAR ignore: LONGINT;
  699. BEGIN
  700. ignore := Unix.write( 1, ADDRESSOF( c ), 1 );
  701. ignore := Unix.write( logfile, ADDRESSOF( c ), 1 );
  702. END Log;
  703. PROCEDURE LogFileOnly( c: CHAR );
  704. VAR ignore: LONGINT;
  705. BEGIN
  706. ignore := Unix.write( logfile, ADDRESSOF( c ), 1 );
  707. END LogFileOnly;
  708. PROCEDURE InitLog;
  709. VAR pid, i: LONGINT;
  710. BEGIN
  711. logname := "AOS.xxxxx.Log";
  712. pid := Unix.getpid(); i := 8;
  713. REPEAT
  714. logname[i] := CHR( pid MOD 10 + ORD( '0' ) ); DEC( i );
  715. pid := pid DIV 10;
  716. UNTIL i = 3;
  717. logfile := Unix.open( ADDRESSOF( logname ), Unix.rdwr + Unix.creat + Unix.trunc, Unix.rwrwr );
  718. VerboseLog;
  719. END InitLog;
  720. PROCEDURE SilentLog*;
  721. BEGIN
  722. Trace.Char := LogFileOnly
  723. END SilentLog;
  724. PROCEDURE VerboseLog*;
  725. BEGIN
  726. Trace.Char := Log
  727. END VerboseLog;
  728. PROCEDURE Append( VAR a: ARRAY OF CHAR; CONST this: ARRAY OF CHAR );
  729. VAR i, j: LONGINT;
  730. BEGIN
  731. i := 0; j := 0;
  732. WHILE a[i] # 0X DO INC( i ) END;
  733. WHILE (i < LEN( a ) - 1) & (this[j] # 0X) DO a[i] := this[j]; INC( i ); INC( j ) END;
  734. a[i] := 0X
  735. END Append;
  736. PROCEDURE Init;
  737. VAR vendor: Vendor; ver: LONGINT;
  738. BEGIN
  739. COPY( Unix.Version, version ); Append( version, Version ); Append(version, S.Date);
  740. timer0 := GetTimer( ); ticks := 0;
  741. InitThreads;
  742. InitLocks;
  743. traceHeap := 1 IN Glue.debug;
  744. InitConfig;
  745. InitLog;
  746. CPUSpeed;
  747. IF CpuIdSupported() THEN
  748. CPUID( vendor, ver, features, features2 ); SetupSSE2Ext
  749. END;
  750. fcr := (FCR() - {0,2,3,10,11}) + {0..5,8,9}; (* default FCR RC=00B *)
  751. END Init;
  752. PROCEDURE {INITIAL} Init0;
  753. BEGIN
  754. Init;
  755. END Init0;
  756. END Machine.
  757. (*
  758. 03.03.1998 pjm First version
  759. 30.06.1999 pjm ProcessorID moved to AosProcessor
  760. *)
  761. (**
  762. Notes
  763. 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.
  764. 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.
  765. 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.
  766. Config strings:
  767. 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".
  768. *)