diff options
Diffstat (limited to 'arch/metag/tbx/tbisoft.S')
| -rw-r--r-- | arch/metag/tbx/tbisoft.S | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/arch/metag/tbx/tbisoft.S b/arch/metag/tbx/tbisoft.S deleted file mode 100644 index b04f50d..0000000 --- a/arch/metag/tbx/tbisoft.S +++ /dev/null @@ -1,237 +0,0 @@ -/* - * tbisoft.S - * - * Copyright (C) 2001, 2002, 2007, 2012 Imagination Technologies. - * - * This program is free software; you can redistribute it and/or modify it under - * the terms of the GNU General Public License version 2 as published by the - * Free Software Foundation. - * - * Support for soft threads and soft context switches - */ - - .file "tbisoft.S" - -#include <asm/tbx.h> - -#ifdef METAC_1_0 -/* Ax.4 is saved in TBICTX */ -#define A0_4 ,A0.4 -#define D0_5 ,D0.5 -#else -/* Ax.4 is NOT saved in TBICTX */ -#define A0_4 -#define D0_5 -#endif - -/* Size of the TBICTX structure */ -#define TBICTX_BYTES ((TBICTX_AX_REGS*8)+TBICTX_AX) - - .text - .balign 4 - .global ___TBISwitchTail - .type ___TBISwitchTail,function -___TBISwitchTail: - B $LSwitchTail - .size ___TBISwitchTail,.-___TBISwitchTail - -/* - * TBIRES __TBIJumpX( TBIX64 ArgsA, PTBICTX *rpSaveCtx, int TrigsMask, - * void (*fnMain)(), void *pStack ); - * - * This is a combination of __TBISwitch and __TBIJump with the context of - * the calling thread being saved in the rpSaveCtx location with a drop-thru - * effect into the __TBIJump logic. ArgsB passes via __TBIJump to the - * routine eventually invoked will reflect the rpSaveCtx value specified. - */ - .text - .balign 4 - .global ___TBIJumpX - .type ___TBIJumpX,function -___TBIJumpX: - CMP D1RtP,#-1 - B $LSwitchStart - .size ___TBIJumpX,.-___TBIJumpX - -/* - * TBIRES __TBISwitch( TBIRES Switch, PTBICTX *rpSaveCtx ) - * - * Software synchronous context switch between soft threads, save only the - * registers which are actually valid on call entry. - * - * A0FrP, D0RtP, D0.5, D0.6, D0.7 - Saved on stack - * A1GbP is global to all soft threads so not virtualised - * A0StP is then saved as the base of the TBICTX of the thread - * - */ - .text - .balign 4 - .global ___TBISwitch - .type ___TBISwitch,function -___TBISwitch: - XORS D0Re0,D0Re0,D0Re0 /* Set ZERO flag */ -$LSwitchStart: - MOV D0FrT,A0FrP /* Boing entry sequence */ - ADD A0FrP,A0StP,#0 - SETL [A0StP+#8++],D0FrT,D1RtP -/* - * Save current frame state - we save all regs because we don't want - * uninitialised crap in the TBICTX structure that the asynchronous resumption - * of a thread will restore. - */ - MOVT D1Re0,#HI($LSwitchExit) /* ASync resume point here */ - ADD D1Re0,D1Re0,#LO($LSwitchExit) - SETD [D1Ar3],A0StP /* Record pCtx of this thread */ - MOVT D0Re0,#TBICTX_SOFT_BIT /* Only soft thread state */ - SETL [A0StP++],D0Re0,D1Re0 /* Push header fields */ - ADD D0FrT,A0StP,#TBICTX_AX-TBICTX_DX /* Address AX save area */ - MOV D0Re0,#0 /* Setup 0:0 result for ASync */ - MOV D1Re0,#0 /* resume of the thread */ - MSETL [A0StP],D0Re0,D0Ar6,D0Ar4,D0Ar2,D0FrT,D0.5,D0.6,D0.7 - SETL [A0StP++],D0Re0,D1Re0 /* Zero CurrRPT, CurrBPOBITS, */ - SETL [A0StP++],D0Re0,D1Re0 /* Zero CurrMODE, CurrDIVTIME */ - ADD A0StP,A0StP,#(TBICTX_AX_REGS*8) /* Reserve AX save space */ - MSETL [D0FrT],A0StP,A0FrP,A0.2,A0.3 A0_4 /* Save AX regs */ - BNZ ___TBIJump -/* - * NextThread MUST be in TBICTX_SOFT_BIT state! - */ -$LSwitchTail: - MOV D0Re0,D0Ar2 /* Result from args */ - MOV D1Re0,D1Ar1 - ADD D1RtP,D1Ar1,#TBICTX_AX - MGETL A0StP,A0FrP,[D1RtP] /* Get frame values */ -$LSwitchCmn: - ADD A0.2,D1Ar1,#TBICTX_DX+(8*5) - MGETL D0.5,D0.6,D0.7,[A0.2] /* Get caller-saved DX regs */ -$LSwitchExit: - GETL D0FrT,D1RtP,[A0FrP++] /* Restore state from frame */ - SUB A0StP,A0FrP,#8 /* Unwind stack */ - MOV A0FrP,D0FrT /* Last memory read completes */ - MOV PC,D1RtP /* Return to caller */ - .size ___TBISwitch,.-___TBISwitch - -/* - * void __TBISyncResume( TBIRES State, int TrigMask ); - * - * This routine causes the TBICTX structure specified in State.Sig.pCtx to - * be restored. This implies that execution will not return to the caller. - * The State.Sig.TrigMask field will be ored into TXMASKI during the - * context switch such that any immediately occurring interrupts occur in - * the context of the newly specified task. The State.Sig.SaveMask parameter - * is ignored. - */ - .text - .balign 4 - .global ___TBISyncResume - .type ___TBISyncResume,function -___TBISyncResume: - MOV D0Re0,D0Ar2 /* Result from args */ - MOV D1Re0,D1Ar1 - XOR D1Ar5,D1Ar5,D1Ar5 /* D1Ar5 = 0 */ - ADD D1RtP,D1Ar1,#TBICTX_AX - SWAP D1Ar5,TXMASKI /* D1Ar5 <-> TXMASKI */ - MGETL A0StP,A0FrP,[D1RtP] /* Get frame values */ - OR TXMASKI,D1Ar5,D1Ar3 /* New TXMASKI */ - B $LSwitchCmn - .size ___TBISyncResume,.-___TBISyncResume - -/* - * void __TBIJump( TBIX64 ArgsA, TBIX32 ArgsB, int TrigsMask, - * void (*fnMain)(), void *pStack ); - * - * Jump directly to a new routine on an arbitrary stack with arbitrary args - * oring bits back into TXMASKI on route. - */ - .text - .balign 4 - .global ___TBIJump - .type ___TBIJump,function -___TBIJump: - XOR D0Re0,D0Re0,D0Re0 /* D0Re0 = 0 */ - MOV A0StP,D0Ar6 /* Stack = Frame */ - SWAP D0Re0,TXMASKI /* D0Re0 <-> TXMASKI */ - MOV A0FrP,D0Ar6 - MOVT A1LbP,#HI(__exit) - ADD A1LbP,A1LbP,#LO(__exit) - MOV D1RtP,A1LbP /* D1RtP = __exit */ - OR TXMASKI,D0Re0,D0Ar4 /* New TXMASKI */ - MOV PC,D1Ar5 /* Jump to fnMain */ - .size ___TBIJump,.-___TBIJump - -/* - * PTBICTX __TBISwitchInit( void *pStack, int (*fnMain)(), - * .... 4 extra 32-bit args .... ); - * - * Generate a new soft thread context ready for it's first outing. - * - * D1Ar1 - Region of memory to be used as the new soft thread stack - * D0Ar2 - Main line routine for new soft thread - * D1Ar3, D0Ar4, D1Ar5, D0Ar6 - arguments to be passed on stack - * The routine returns the initial PTBICTX value for the new thread - */ - .text - .balign 4 - .global ___TBISwitchInit - .type ___TBISwitchInit,function -___TBISwitchInit: - MOV D0FrT,A0FrP /* Need save return point */ - ADD A0FrP,A0StP,#0 - SETL [A0StP++],D0FrT,D1RtP /* Save return to caller */ - MOVT A1LbP,#HI(__exit) - ADD A1LbP,A1LbP,#LO(__exit) - MOV D1RtP,A1LbP /* Get address of __exit */ - ADD D1Ar1,D1Ar1,#7 /* Align stack to 64-bits */ - ANDMB D1Ar1,D1Ar1,#0xfff8 /* by rounding base up */ - MOV A0.2,D1Ar1 /* A0.2 is new stack */ - MOV D0FrT,D1Ar1 /* Initial puesdo-frame pointer */ - SETL [A0.2++],D0FrT,D1RtP /* Save return to __exit */ - MOV D1RtP,D0Ar2 - SETL [A0.2++],D0FrT,D1RtP /* Save return to fnMain */ - ADD D0FrT,D0FrT,#8 /* Advance puesdo-frame pointer */ - MSETL [A0.2],D0Ar6,D0Ar4 /* Save extra initial args */ - MOVT D1RtP,#HI(___TBIStart) /* Start up code for new stack */ - ADD D1RtP,D1RtP,#LO(___TBIStart) - SETL [A0.2++],D0FrT,D1RtP /* Save return to ___TBIStart */ - ADD D0FrT,D0FrT,#(8*3) /* Advance puesdo-frame pointer */ - MOV D0Re0,A0.2 /* Return pCtx for new thread */ - MOV D1Re0,#0 /* pCtx:0 is default Arg1:Arg2 */ -/* - * Generate initial TBICTX state - */ - MOVT D1Ar1,#HI($LSwitchExit) /* Async restore code */ - ADD D1Ar1,D1Ar1,#LO($LSwitchExit) - MOVT D0Ar2,#TBICTX_SOFT_BIT /* Only soft thread state */ - ADD D0Ar6,A0.2,#TBICTX_BYTES /* New A0StP */ - MOV D1Ar5,A1GbP /* Same A1GbP */ - MOV D0Ar4,D0FrT /* Initial A0FrP */ - MOV D1Ar3,A1LbP /* Same A1LbP */ - SETL [A0.2++],D0Ar2,D1Ar1 /* Set header fields */ - MSETL [A0.2],D0Re0,D0Ar6,D0Ar4,D0Ar2,D0FrT,D0.5,D0.6,D0.7 - MOV D0Ar2,#0 /* Zero values */ - MOV D1Ar1,#0 - SETL [A0.2++],D0Ar2,D1Ar1 /* Zero CurrRPT, CurrBPOBITS, */ - SETL [A0.2++],D0Ar2,D1Ar1 /* CurrMODE, and pCurrCBuf */ - MSETL [A0.2],D0Ar6,D0Ar4,D0Ar2,D0FrT D0_5 /* Set DX and then AX regs */ - B $LSwitchExit /* All done! */ - .size ___TBISwitchInit,.-___TBISwitchInit - - .text - .balign 4 - .global ___TBIStart - .type ___TBIStart,function -___TBIStart: - MOV D1Ar1,D1Re0 /* Pass TBIRES args to call */ - MOV D0Ar2,D0Re0 - MGETL D0Re0,D0Ar6,D0Ar4,[A0FrP] /* Get hidden args */ - SUB A0StP,A0FrP,#(8*3) /* Entry stack pointer */ - MOV A0FrP,D0Re0 /* Entry frame pointer */ - MOVT A1LbP,#HI(__exit) - ADD A1LbP,A1LbP,#LO(__exit) - MOV D1RtP,A1LbP /* D1RtP = __exit */ - MOV PC,D1Re0 /* Jump into fnMain */ - .size ___TBIStart,.-___TBIStart - -/* - * End of tbisoft.S - */ |
