Mercurial > hg > Members > kono > nitros9-code
view level2/modules/kernel/krnp2.asm @ 1145:ca83286ded5b
Start of new OS-9 L2 Kernel
| author | boisy |
|---|---|
| date | Tue, 22 Apr 2003 19:35:48 +0000 |
| parents | |
| children | 90bad6d8388c |
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******************************************************************** * OS9p2 - NitrOS-9 Kernel Part II * * $Id$ * * Copyright (c) 1982 Microware Corporation * * Modified for 6309 Native mode by: * * Bill Nobel, L. Curtis Boyle & Wes Gale - Gale Force Enterprises * * Ed. Comments Who YY/MM/DD * ------------------------------------------------------------------ * * 17.2 08/02/92 - Active in 6309 Native mode, No apparent bugs (BN) * - Optimized F$Fork (BN) * - Optimized F$Chain (BN) * 18.4 92/12/15 - Cut initial memory allocation routine - unnecessary * 18.5 93/01/18 - Fixed bug in F$Sleep (LCB) * - Optimized F$All64 to use tfm (BN) * NitrOS9 V1.09 - Move & optomized F$CpyMem to OS9P1 * V1.10 93/05/23 - Slight opt to UnLink * V1.11 93/07/26 - Slight opt in F$Icpt * - Slight opt in F$Wait alarm clearing * - Slight opt to speed up path table full errors * - Changed LBEQ to BEQ in F$Unlink * V1.16 93/09/03 - Moved F$SUser to OS9P1 (WG) * 93/09/08 - Moved F$SUser back to OS9P2 for room in OS9P1 (LCB) * 93/09/10 - F$Find64 (L0A50) - Took out BSR to L0A5C, merged routine * in (only called from here), and took out PSHS/PULS D * Also modified error structure a bit to shorten it * 93/10/06 - Added conditional assembly to skip Network I/O ptrs since * Coco network never released by Tandy/Microware (in F$Fork) * - @ GotNProc (in F$Fork), saved 1 byte/cycle when inheriting * User # & priority * - Changed routine @ L01FB to use U instead of Y (slightly * smaller & slightly faster), and also used CLRB with STB * instead of CLR for clearing DAT block #'s (F$UnLink) * 93/12/17 - Moved F$CRCMod code here to give some room in OS9P1 * 94/05/15 - Attempted opts in Unlink: Changed usage of W to D @ L0185 * and L0198 and L01B5, also optomized L017C to eliminate a * branch (speeds up module dir search by 3 cycles/module * checked) * - Changed BRA L032F @ L02EC (AllProc error) to RTS * - Changed BRA L0629 @ L05DF to RTS * - Changed L066A & L067B from BRA L06F4 to PULS CC,A,Y,U,PC * (F$Send errors) * - Changed L0A2B from BRA L0A4F to RTS (F$UnLoad error) * - Changed L0C53 & L0C81 BRA L0C93 to CLRB/RTS (F$GCMDir) * -- Alan DeKok * 94/10/28 - added boot debug calls * - Changed code at ~L0D47 to allow F$Fork/F$Chain of Obj6309 * 94/10/30 - Added error checking on F$Fork of CC3Go * - Minor mods to F$SSWI call * - Minor mods to F$STime * - Changed F$GModDr to BRA to similar code in F$GBlkMp * nam OS9p2 ttl NitrOS-9 Kernel Part II ** If Network I/O ptrs are disabled, F$Fork runs 72 cycles faster Network equ 0 Set to 1 to enable network I/O ptrs ifp1 use defsfile endc TC9 set false "true" use TC-9 6309 trap vector Edition equ 18 Revision equ 5 *DAT.Free equ $333E --- remove this def later mod eom,MName,Systm,ReEnt+Revision,OS9P2,$0100 MName fcs /OS9p2/ fcb Edition ifeq TC9-1 * Entry: None * Exit : Process killed & register dump produced for user Trap bitmd #%01000000 illegal instruction? bne BadIns yes, go process bitmd #%10000000 division by 0? bne Div0 yes, go process jmp [<D.XSWI] act as if nothing happened * Process illegal instruction trap BadIns bsr SetProc move the register stack here ldb #18 get error code for F$Exit bra TrapDone * Process division by 0 trap Div0 bsr SetProc move the register stack ldb #45 get error code for F$Exit * Return to system after the trap * Entry: B=Error code * U=Pointer to register stack TrapDone stb R$B,u save the error code to register stack for F$Exit lbra FExit enter F$Exit directly * Set process to system state & copy register stack for trap processing SetProc ldd <D.SysSvc set system call processor to system side std <D.XSWI2 ldd <D.SysIRQ do the same thing for IRQ's std <D.XIRQ ldx <D.Proc get current process pointer IFNE H6309 oim #SysState,P$State,x mark process as system state ELSE ENDC * copy register stack to process descriptor sts P$SP,x save stack pointer leas (P$Stack-R$Size),x point S to register stack destination andcc #^IntMasks force interrupts back on leau ,s point to destination register stack ldb P$Task,x get task # of destination ldx P$SP,x get the user/system stack pointer pshs b preserve task for a moment tfr x,d copy it for easier calcs bita #%11100000 offset above block 0? beq done yes, no calc needed get out anda #%00011111 make it a offset within a block tfr d,x copy new offset lsra make A an offset into DAT image lsra lsra lsra done puls b restore task # leax -$6000,x make it a pointer to where I'll map the block tfr u,y pshs cc,u preserve IRQ status & dest pointer ldu <D.TskIPt lslb adjust task # to fit table ldu b,u get the DAT image pointer leau a,u point to the blocks needed lda 1,u get 1st block ldb 3,u get a second in case of overlap orcc #IntMasks shut IRQ's down std >$FFA5 map in the blocks IFNE H6309 ldw #R$Size get size of register stack tfm x+,y+ move 'em to process descriptor ELSE ldb #R$Size Uday lda ,x+ sta ,y+ decb bne Uday ENDC ldx <D.SysDAT get the system DAT image pointer lda $0B,x get the original blocks ldb $0D,x std >$FFA5 map 'em back in puls cc,u,pc restore IRQ's, register stack pointer & return endc OS9P2 lda #'2 into OS9p2 jsr <D.BtBug leay SvcTab,pc install system calls os9 F$SSvc ifeq TC9-1 leax Trap,pc stx <D.SWI endc * Change to default directory L003A ldu <D.Init get init module pointer ldd SysStr,u get pointer to system device name (usually '/dd') beq L004F don't exist, open std device leax d,u point to name lda #'x tried chd'ing jsr <D.BtBug lda #(EXEC.+READ.) get file mode os9 I$ChgDir change to it bcc L004F went ok, go on os9 F$Boot try & load boot file bcc L003A go try again L004F ldu <D.Init get pointer to init ldd <StdStr,u point to default device (usually '/term') beq L0077 don't exist go do OS9P3 leax d,u point to it lda #'o tried opening output window jsr <D.BtBug lda #UPDAT. get file mode os9 I$Open open path to it bcc L0066 went ok, save path # os9 F$Boot try & re-boot bcc L004F go try again bra L009B crash machine L0066 ldx <D.Proc get current process pointer sta <P$Path,x save stdin path os9 I$Dup dupe it sta <P$Path+1,x save stdout path os9 I$Dup dupe it again sta <P$Path+2,x save stderr path L0077 leax <L0096,pc point to 'OS9P3' lda #Systm get type os9 F$Link try & link bcs L0083 not there, go on jsr ,y execute it * Execute module listed in Init module L0083 ldu <D.Init get init module pointer ldd InitStr,u get offset to name of first module leax d,u point to it lda #'C tried to to CC3Go jsr <D.BtBug lda #Objct get module type clrb get mem size IFNE H6309 tfr 0,y Get parameter size ELSE ldy #$0000 ENDC os9 F$Fork fork it bcc L0093 if no error, go execute it jmp <D.Crash otherwise crash the system L0093 os9 F$NProc let it take over L0096 fcs /OS9p3/ L009B jmp <D.Crash svctab fcb F$UnLink fdb FUnLink-*-2 fcb F$Fork fdb FFork-*-2 fcb F$Wait fdb FWait-*-2 fcb F$Chain fdb FChain-*-2 fcb F$Exit fdb FExit-*-2 fcb F$Mem fdb FMem-*-2 fcb F$Send fdb FSend-*-2 fcb F$Icpt fdb FIcpt-*-2 fcb F$Sleep fdb FSleep-*-2 fcb F$SPrior fdb FSPrior-*-2 fcb F$ID fdb FID-*-2 fcb F$SSWI fdb FSSWI-*-2 fcb F$STime fdb FSTime-*-2 fcb F$SchBit fdb FSchBit-*-2 fcb F$SchBit+$80 fdb FSSchBit-*-2 fcb F$AllBit fdb FAllBit-*-2 fcb F$AllBit+$80 fdb FSAllBit-*-2 fcb F$DelBit fdb FDelBit-*-2 fcb F$DelBit+$80 fdb FSDelBit-*-2 fcb F$GPrDsc fdb FGPrDsc-*-2 fcb F$GBlkMp fdb FGBlkMp-*-2 fcb F$GModDr fdb FGModDr-*-2 fcb F$SUser Added back here for room in OS9p1 fdb FSUser-*-2 fcb F$UnLoad fdb FUnLoad-*-2 fcb F$Find64+$80 fdb FFind64-*-2 fcb F$All64+$80 fdb FAll64-*-2 fcb F$Ret64+$80 fdb FRet64-*-2 fcb F$GProcP+$80 fdb FGProcP-*-2 fcb F$DelImg+$80 fdb FDelImg-*-2 fcb F$AllPrc+$80 fdb FAllPrc-*-2 fcb F$DelPrc+$80 fdb FDelPrc-*-2 fcb F$MapBlk fdb FMapBlk-*-2 fcb F$ClrBlk fdb FClrBlk-*-2 fcb F$GCMDir+$80 fdb FGCMDir-*-2 fcb F$CRCMod new system call to change module CRC calcs on/off fdb FCRCMod-*-2 fcb $7f fdb GetIOMan-*-2 fcb $80 use fcrcmod.asm * Link & execute IOMan * Entry: None * Exit : I/O handling installed & ready for use GetIOMan pshs d,x,y,u preserve regs bsr LnkIOMan link to ioman bcc GotIOMan no errors, go on os9 F$Boot re-load boot file bcs IOManErr error loading, return bsr LnkIOMan link to ioman bcs IOManErr error, save it & return GotIOMan jsr ,y execute IOMan's init routine puls d,x,y,u restore registers jmp [IOEntry,y] Execute I/O vector IOManErr stb 1,s save error if any puls d,x,y,u,pc restore & return * Link to IOMan * Entry: None * Exit : U=Pointer to IOMan module header * Y=Pointer to IOMan entry point LnkIOMan leax <IOMan,pc point to name lda #(Systm+Objct) get type os9 F$Link link it rts return IOMan fcs /IOMan/ use funlink.asm use ffork.asm use fallprc.asm use fchain.asm use fexit.asm use fmem.asm use fsend.asm use ficpt.asm use fsleep.asm use fsprior.asm use fid.asm use fsswi.asm use fstime.asm use fallbit.asm use fgprdsc.asm use fgblkmp.asm use fgmoddr.asm use fsuser.asm use funload.asm use ffind64.asm use fgprocp.asm use fdelimg.asm use fmapblk.asm use fclrblk.asm use fgcmdir.asm emod eom equ * end