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Diffstat (limited to 'src/arch/e1/core/start.S')
| -rw-r--r-- | src/arch/e1/core/start.S | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/arch/e1/core/start.S b/src/arch/e1/core/start.S new file mode 100644 index 000000000..691f39bdb --- /dev/null +++ b/src/arch/e1/core/start.S @@ -0,0 +1,111 @@ +/* + * Derived from the Hyperstone's library source code. + * Copyright (C) 2002-2003 GDT, Yannis Mitsos <gmitsos@telecom.ntua.gr> + * George Thanos <gthanos@telecom.ntua.gr> + */ + .global Priority ; Task-Priority + .global _Stack1Size ; Size of hardware stack + .global _Stack2Size ; Size of aggregate stack + .global _Stack1Base ; Base of hardware stack + .global _Stack2Base ; Base of aggregate stack + .global _Mem0HeapBase ; Base of Heap in Mem0 + .global _Mem1HeapBase ; Base of Heap in Mem1 + + .global _init_peripherals + .global _main + .global Main + + .global __exit + .global __fmode + .global __MaxArgCount + + .text +BasePtrs: + .weak G6Base,G7Base,G8Base,G9Base,G10Base,G11Base,G12Base,G13Base + .long G6Base,G7Base,G8Base,G9Base,G10Base,G11Base,G12Base,G13Base +BasePtrsEnd: +HeapPtrs: + .long _Mem0HeapBase + .long _Mem1HeapBase +HeapPtrsEnd: + +__MaxArgCount: + .long 32 +__StandAloneMode: + .long 0 ; 0 indicate stand alone mode + +;============================================================================; +; Startup-Code ; +;============================================================================; + .data + +; do not change the order of: __argc,.. +__argc: + .long 0 +__argv: + .long 0 +__IsShell: + .long 1 +ErrorLevel: + .long 0 +__lab: + .long 0 +__fmode: + .long 0x4000 ; O_TEXT attribute + +_isa_drivers: + .long 0 + +_isa_drivers_end: + .long 0 + + + .text +Main: +StartUp: + FRAME L5, L0 + MOVI L2, __bss_start__ ; clear the .bss segment +0: CMPI L2, __bss_end__ + BHE 0f + DBR 0b + STW.P L2, 0 +0: SUM L2, PC, BasePtrs-$ ; Load BasePtrs G6-G13 + LDD.P L2, G6 + LDD.P L2, G8 +; LDD.P L2, G10 + LDD.P L2, G12 + MOVI L2, 1 + SUM L3, PC, __StandAloneMode-$ + STW.R L3, L2 + + ;----------------------------------------------------------------; + ; Call main C function ; + ;----------------------------------------------------------------; +2: LDW.D PC, L2, __argc - $ ; pass count of arguments to main + LDW.D PC, L3, __argv - $ ; pass pointer array to main + CALL L4, PC, _init_peripherals - $ + CALL L4, PC, _main - $ ; --> Call Main-Program + CHK PC, PC ; trap if execution arrives here + +__exit: + FRAME L5, L1 + STW.D PC, L0, ErrorLevel - $ ; Store ERRORLEVEL + + CHK PC, PC + RET PC, L1 + + .global ___main +___main: + FRAME L4, L1 + MOVI L3, 2 + STW.D PC, L3, __StandAloneMode-$ + RET PC, L1 ; does not return + + .section _GOT_ + .long Main+4 ; OnCreate + .long Main+8 ; OnError + .long BasePtrs ; G6 + .long BasePtrs+4 ; G7 + .long BasePtrs+8 ; G8 + + .END |