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cebix |
1.1 |
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* asm_support.asm - AmigaOS utility functions in assembly language |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
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INCLUDE "exec/types.i" |
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INCLUDE "exec/macros.i" |
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INCLUDE "exec/memory.i" |
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INCLUDE "exec/tasks.i" |
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INCLUDE "dos/dos.i" |
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INCLUDE "devices/timer.i" |
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XDEF _AtomicAnd |
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XDEF _AtomicOr |
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XDEF _MoveVBR |
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XDEF _TimevalTo64 |
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XDEF _TimevalToMacTime |
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XDEF _Execute68k |
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XDEF _Execute68kTrap |
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XDEF _TrapHandlerAsm |
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XDEF _ExceptionHandlerAsm |
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XDEF _Scod060Patch1 |
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XDEF _Scod060Patch2 |
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XDEF _ThInitFPUPatch |
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XREF _OldTrapHandler |
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XREF _OldExceptionHandler |
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XREF _IllInstrHandler |
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XREF _PrivViolHandler |
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XREF _EmulatedSR |
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XREF _IRQSigMask |
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XREF _InterruptFlags |
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XREF _MainTask |
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XREF _SysBase |
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XREF @QuitEmulator__Fv |
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SECTION text,CODE |
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* |
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* Atomic bit operations (don't trust the compiler) |
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* |
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_AtomicAnd move.l 4(sp),a0 |
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move.l 8(sp),d0 |
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and.l d0,(a0) |
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rts |
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_AtomicOr move.l 4(sp),a0 |
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move.l 8(sp),d0 |
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or.l d0,(a0) |
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rts |
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* |
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* Move VBR away from 0 if neccessary |
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* |
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_MoveVBR movem.l d0-d1/a0-a1/a5-a6,-(sp) |
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move.l _SysBase,a6 |
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lea getvbr,a5 ;VBR at 0? |
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JSRLIB Supervisor |
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tst.l d0 |
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bne.s 1$ |
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move.l #$400,d0 ;Yes, allocate memory for new table |
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move.l #MEMF_PUBLIC,d1 |
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JSRLIB AllocMem |
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tst.l d0 |
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beq.s 1$ |
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JSRLIB Disable |
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move.l d0,a5 ;Copy old table |
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move.l d0,a1 |
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sub.l a0,a0 |
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move.l #$400,d0 |
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JSRLIB CopyMem |
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JSRLIB CacheClearU |
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move.l a5,d0 ;Set VBR |
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lea setvbr,a5 |
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JSRLIB Supervisor |
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JSRLIB Enable |
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1$ movem.l (sp)+,d0-d1/a0-a1/a5-a6 |
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rts |
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getvbr movec vbr,d0 |
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rte |
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setvbr movec d0,vbr |
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rte |
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* |
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* Convert timeval to 64 bit microseconds |
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* |
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_TimevalTo64 move.l 4(sp),a0 ;Pointer to timeval |
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move.l 8(sp),a1 ;Pointer to high longword of result, low longword is returned in d0 |
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move.l d2,-(sp) |
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move.l TV_SECS(a0),d0 ;Convert to 64 bit microseconds |
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mulu.l #1000000,d1:d0 |
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add.l TV_MICRO(a0),d0 |
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moveq #0,d2 |
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addx.l d2,d1 |
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move.l d1,(a1) |
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move.l (sp)+,d2 |
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rts |
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* |
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* Convert timeval to Mac time value (>0: milliseconds, <0: microseconds) |
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* |
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_TimevalToMacTime |
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move.l 4(sp),a0 ;Pointer to timeval |
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move.l d2,-(sp) |
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move.l TV_SECS(a0),d0 ;Convert to 64 bit microseconds |
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mulu.l #1000000,d1:d0 |
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add.l TV_MICRO(a0),d0 |
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moveq #0,d2 |
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addx.l d2,d1 |
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tst.l d1 ;Too large for 32 bit microseconds? |
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bne.s 1$ |
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cmp.l #$7fffffff,d0 |
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bhi.s 1$ |
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neg.l d0 ;No, return negative microseconds |
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bra.s 2$ |
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1$ divu.l #1000,d1:d0 ;Yes, return milliseconds |
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2$ move.l (sp)+,d2 |
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rts |
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* |
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* Execute 68k subroutine (must be ended with rts) |
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* r->a[7] and r->sr are unused! |
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* |
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; void Execute68k(uint32 addr, M68kRegisters *r); |
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_Execute68k |
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move.l 4(sp),d0 ;Get arguments |
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move.l 8(sp),a0 |
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movem.l d2-d7/a2-a6,-(sp) ;Save registers |
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move.l a0,-(sp) ;Push pointer to M68kRegisters on stack |
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pea 1$ ;Push return address on stack |
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move.l d0,-(sp) ;Push pointer to 68k routine on stack |
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movem.l (a0),d0-d7/a0-a6 ;Load registers from M68kRegisters |
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rts ;Jump into 68k routine |
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1$ move.l a6,-(sp) ;Save a6 |
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move.l 4(sp),a6 ;Get pointer to M68kRegisters |
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movem.l d0-d7/a0-a5,(a6) ;Save d0-d7/a0-a5 to M68kRegisters |
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move.l (sp)+,56(a6) ;Save a6 to M68kRegisters |
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addq.l #4,sp ;Remove pointer from stack |
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movem.l (sp)+,d2-d7/a2-a6 ;Restore registers |
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rts |
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* |
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* Execute MacOS 68k trap |
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* r->a[7] and r->sr are unused! |
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* |
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; void Execute68kTrap(uint16 trap, M68kRegisters *r); |
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_Execute68kTrap |
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move.l 4(sp),d0 ;Get arguments |
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move.l 8(sp),a0 |
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movem.l d2-d7/a2-a6,-(sp) ;Save registers |
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move.l a0,-(sp) ;Push pointer to M68kRegisters on stack |
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move.w d0,-(sp) ;Push trap word on stack |
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subq.l #8,sp ;Create fake A-Line exception frame |
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movem.l (a0),d0-d7/a0-a6 ;Load registers from M68kRegisters |
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move.l a2,-(sp) ;Save a2 and d2 |
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move.l d2,-(sp) |
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lea 1$,a2 ;a2 points to return address |
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move.w 16(sp),d2 ;Load trap word into d2 |
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jmp ([$28.w],10) ;Jump into MacOS A-Line handler |
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1$ move.l a6,-(sp) ;Save a6 |
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move.l 6(sp),a6 ;Get pointer to M68kRegisters |
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movem.l d0-d7/a0-a5,(a6) ;Save d0-d7/a0-a5 to M68kRegisters |
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move.l (sp)+,56(a6) ;Save a6 to M68kRegisters |
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addq.l #6,sp ;Remove pointer and trap word from stack |
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movem.l (sp)+,d2-d7/a2-a6 ;Restore registers |
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rts |
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* |
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* Exception handler of main task (for 60Hz interrupts) |
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* |
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_ExceptionHandlerAsm |
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move.l d0,-(sp) ;Save d0 |
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and.l #SIGBREAKF_CTRL_C,d0 ;CTRL-C? |
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bne.s 2$ |
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move.w _EmulatedSR,d0 ;Interrupts enabled in emulated SR? |
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and.w #$0700,d0 |
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bne 1$ |
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move.w #$0064,-(sp) ;Yes, fake interrupt stack frame |
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pea 1$ |
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move.w _EmulatedSR,d0 |
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move.w d0,-(sp) |
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or.w #$0100,d0 ;Set interrupt level in SR |
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move.w d0,_EmulatedSR |
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move.l $64.w,a0 ;Jump to MacOS interrupt handler |
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jmp (a0) |
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1$ move.l (sp)+,d0 ;Restore d0 |
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rts |
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2$ JSRLIB Forbid ;Waiting for Dos signal? |
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sub.l a1,a1 |
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JSRLIB FindTask |
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move.l d0,a0 |
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move.l TC_SIGWAIT(a0),d0 |
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move.l TC_SIGRECVD(a0),d1 |
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JSRLIB Permit |
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btst #SIGB_DOS,d0 |
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beq 3$ |
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btst #SIGB_DOS,d1 |
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bne 4$ |
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3$ lea TC_SIZE(a0),a0 ;No, remove pending Dos packets |
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JSRLIB GetMsg |
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move.w _EmulatedSR,d0 |
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or.w #$0700,d0 ;Disable all interrupts |
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move.w d0,_EmulatedSR |
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moveq #0,d0 ;Disable all exception signals |
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moveq #-1,d1 |
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JSRLIB SetExcept |
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jsr @QuitEmulator__Fv ;CTRL-C, quit emulator |
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4$ move.l (sp)+,d0 |
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rts |
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* |
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* Process Manager 68060 FPU patches |
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* |
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_Scod060Patch1 fsave -(sp) ;Save FPU state |
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tst.b 2(sp) ;Null? |
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beq.s 1$ |
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fmovem.x fp0-fp7,-(sp) ;No, save FPU registers |
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fmove.l fpiar,-(sp) |
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fmove.l fpsr,-(sp) |
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fmove.l fpcr,-(sp) |
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pea -1 ;Push "FPU state saved" flag |
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1$ move.l d1,-(sp) |
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move.l d0,-(sp) |
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bsr.s 3$ ;Switch integer registers and stack |
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addq.l #8,sp |
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tst.b 2(sp) ;New FPU state null or "FPU state saved" flag set? |
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beq.s 2$ |
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addq.l #4,sp ;Flag set, skip it |
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fmove.l (sp)+,fpcr ;Restore FPU registers and state |
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fmove.l (sp)+,fpsr |
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fmove.l (sp)+,fpiar |
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fmovem.x (sp)+,fp0-fp7 |
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2$ frestore (sp)+ |
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movem.l (sp)+,d0-d1 |
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rts |
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3$ move.l 4(sp),a0 ;Switch integer registers and stack |
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move sr,-(sp) |
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movem.l d2-d7/a2-a6,-(sp) |
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cmp.w #0,a0 |
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beq.s 4$ |
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move.l sp,(a0) |
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4$ move.l $36(sp),a0 |
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movem.l (a0)+,d2-d7/a2-a6 |
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move (a0)+,sr |
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move.l a0,sp |
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rts |
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_Scod060Patch2 move.l d0,-(sp) ;Create 68060 null frame on stack |
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move.l d0,-(sp) |
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move.l d0,-(sp) |
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frestore (sp)+ ;and load it |
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rts |
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* |
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* Thread Manager 68060 FPU patches |
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* |
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_ThInitFPUPatch tst.b $40(a4) |
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bne.s 1$ |
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moveq #0,d0 ;Create 68060 null frame on stack |
| 320 |
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move.l d0,-(a3) |
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move.l d0,-(a3) |
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move.l d0,-(a3) |
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1$ rts |
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* |
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* Trap handler of main task |
| 327 |
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* |
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_TrapHandlerAsm cmp.l #4,(sp) ;Illegal instruction? |
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beq.s doillinstr |
| 331 |
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cmp.l #10,(sp) ;A-Line exception? |
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beq.s doaline |
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cmp.l #8,(sp) ;Privilege violation? |
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beq.s doprivviol |
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move.l _OldTrapHandler,-(sp) ;No, jump to old trap handler |
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rts |
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* |
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* A-Line handler: call MacOS A-Line handler |
| 341 |
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* |
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| 343 |
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doaline move.l a0,(sp) ;Save a0 |
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move.l usp,a0 ;Get user stack pointer |
| 345 |
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move.l 8(sp),-(a0) ;Copy stack frame to user stack |
| 346 |
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move.l 4(sp),-(a0) |
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move.l a0,usp ;Update USP |
| 348 |
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move.l (sp)+,a0 ;Restore a0 |
| 349 |
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| 350 |
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addq.l #8,sp ;Remove exception frame from supervisor stack |
| 351 |
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andi #$d8ff,sr ;Switch to user mode, enable interrupts |
| 352 |
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| 353 |
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move.l $28.w,-(sp) ;Jump to MacOS exception handler |
| 354 |
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rts |
| 355 |
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| 356 |
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* |
| 357 |
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* Illegal instruction handler: call IllInstrHandler() (which calls EmulOp()) |
| 358 |
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* to execute extended opcodes (see emul_op.h) |
| 359 |
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* |
| 360 |
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| 361 |
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doillinstr move.l a6,(sp) ;Save a6 |
| 362 |
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move.l usp,a6 ;Get user stack pointer |
| 363 |
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| 364 |
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move.l a6,-10(a6) ;Push USP (a7) |
| 365 |
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move.l 6(sp),-(a6) ;Push PC |
| 366 |
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|
move.w 4(sp),-(a6) ;Push SR |
| 367 |
|
|
subq.l #4,a6 ;Skip saved USP |
| 368 |
|
|
move.l (sp),-(a6) ;Push old a6 |
| 369 |
|
|
movem.l d0-d7/a0-a5,-(a6) ;Push remaining registers |
| 370 |
|
|
move.l a6,usp ;Update USP |
| 371 |
|
|
|
| 372 |
|
|
add.w #12,sp ;Remove exception frame from supervisor stack |
| 373 |
|
|
andi #$d8ff,sr ;Switch to user mode, enable interrupts |
| 374 |
|
|
|
| 375 |
|
|
move.l a6,-(sp) ;Jump to IllInstrHandler() in main.cpp |
| 376 |
|
|
jsr _IllInstrHandler |
| 377 |
|
|
addq.l #4,sp |
| 378 |
|
|
|
| 379 |
|
|
movem.l (sp)+,d0-d7/a0-a6 ;Restore registers |
| 380 |
|
|
addq.l #4,sp ;Skip saved USP (!!) |
| 381 |
|
|
rtr ;Return from exception |
| 382 |
|
|
|
| 383 |
|
|
* |
| 384 |
|
|
* Privilege violation handler: MacOS runs in supervisor mode, |
| 385 |
|
|
* so we have to emulate certain privileged instructions |
| 386 |
|
|
* |
| 387 |
|
|
|
| 388 |
|
|
doprivviol move.l d0,(sp) ;Save d0 |
| 389 |
|
|
move.w ([6,sp]),d0 ;Get instruction word |
| 390 |
|
|
|
| 391 |
|
|
cmp.w #$40e7,d0 ;move sr,-(sp)? |
| 392 |
|
|
beq pushsr |
| 393 |
|
|
cmp.w #$46df,d0 ;move (sp)+,sr? |
| 394 |
|
|
beq popsr |
| 395 |
|
|
|
| 396 |
|
|
cmp.w #$007c,d0 ;ori #xxxx,sr? |
| 397 |
|
|
beq orisr |
| 398 |
|
|
cmp.w #$027c,d0 ;andi #xxxx,sr? |
| 399 |
|
|
beq andisr |
| 400 |
|
|
|
| 401 |
|
|
cmp.w #$46fc,d0 ;move #xxxx,sr? |
| 402 |
|
|
beq movetosrimm |
| 403 |
|
|
|
| 404 |
|
|
cmp.w #$46ef,d0 ;move (xxxx,sp),sr? |
| 405 |
|
|
beq movetosrsprel |
| 406 |
|
|
cmp.w #$46d8,d0 ;move (a0)+,sr? |
| 407 |
|
|
beq movetosra0p |
| 408 |
|
|
cmp.w #$46d9,d0 ;move (a1)+,sr? |
| 409 |
|
|
beq movetosra1p |
| 410 |
|
|
|
| 411 |
|
|
cmp.w #$40f8,d0 ;move sr,xxxx.w? |
| 412 |
|
|
beq movefromsrabs |
| 413 |
|
|
cmp.w #$40d0,d0 ;move sr,(a0)? |
| 414 |
|
|
beq movefromsra0 |
| 415 |
|
|
cmp.w #$40d7,d0 ;move sr,(sp)? |
| 416 |
|
|
beq movefromsra0 |
| 417 |
|
|
|
| 418 |
|
|
cmp.w #$f327,d0 ;fsave -(sp)? |
| 419 |
|
|
beq fsavepush |
| 420 |
|
|
cmp.w #$f35f,d0 ;frestore (sp)+? |
| 421 |
|
|
beq frestorepop |
| 422 |
|
|
|
| 423 |
|
|
cmp.w #$4e73,d0 ;rte? |
| 424 |
|
|
beq pvrte |
| 425 |
|
|
|
| 426 |
|
|
cmp.w #$40c0,d0 ;move sr,d0? |
| 427 |
|
|
beq movefromsrd0 |
| 428 |
|
|
cmp.w #$40c1,d0 ;move sr,d1? |
| 429 |
|
|
beq movefromsrd1 |
| 430 |
|
|
cmp.w #$40c2,d0 ;move sr,d2? |
| 431 |
|
|
beq movefromsrd2 |
| 432 |
|
|
cmp.w #$40c3,d0 ;move sr,d3? |
| 433 |
|
|
beq movefromsrd3 |
| 434 |
|
|
cmp.w #$40c4,d0 ;move sr,d4? |
| 435 |
|
|
beq movefromsrd4 |
| 436 |
|
|
cmp.w #$40c5,d0 ;move sr,d5? |
| 437 |
|
|
beq movefromsrd5 |
| 438 |
|
|
cmp.w #$40c6,d0 ;move sr,d6? |
| 439 |
|
|
beq movefromsrd6 |
| 440 |
|
|
cmp.w #$40c7,d0 ;move sr,d7? |
| 441 |
|
|
beq movefromsrd7 |
| 442 |
|
|
|
| 443 |
|
|
cmp.w #$46c0,d0 ;move d0,sr? |
| 444 |
|
|
beq movetosrd0 |
| 445 |
|
|
cmp.w #$46c1,d0 ;move d1,sr? |
| 446 |
|
|
beq movetosrd1 |
| 447 |
|
|
cmp.w #$46c2,d0 ;move d2,sr? |
| 448 |
|
|
beq movetosrd2 |
| 449 |
|
|
cmp.w #$46c3,d0 ;move d3,sr? |
| 450 |
|
|
beq movetosrd3 |
| 451 |
|
|
cmp.w #$46c4,d0 ;move d4,sr? |
| 452 |
|
|
beq movetosrd4 |
| 453 |
|
|
cmp.w #$46c5,d0 ;move d5,sr? |
| 454 |
|
|
beq movetosrd5 |
| 455 |
|
|
cmp.w #$46c6,d0 ;move d6,sr? |
| 456 |
|
|
beq movetosrd6 |
| 457 |
|
|
cmp.w #$46c7,d0 ;move d7,sr? |
| 458 |
|
|
beq movetosrd7 |
| 459 |
|
|
|
| 460 |
|
|
cmp.w #$4e7a,d0 ;movec cr,x? |
| 461 |
|
|
beq movecfromcr |
| 462 |
|
|
cmp.w #$4e7b,d0 ;movec x,cr? |
| 463 |
|
|
beq movectocr |
| 464 |
|
|
|
| 465 |
|
|
cmp.w #$f478,d0 ;cpusha dc? |
| 466 |
|
|
beq cpushadc |
| 467 |
|
|
cmp.w #$f4f8,d0 ;cpusha dc/ic? |
| 468 |
|
|
beq cpushadcic |
| 469 |
|
|
|
| 470 |
|
|
pv_unhandled move.l (sp),d0 ;Unhandled instruction, jump to handler in main.cpp |
| 471 |
|
|
move.l a6,(sp) ;Save a6 |
| 472 |
|
|
move.l usp,a6 ;Get user stack pointer |
| 473 |
|
|
|
| 474 |
|
|
move.l a6,-10(a6) ;Push USP (a7) |
| 475 |
|
|
move.l 6(sp),-(a6) ;Push PC |
| 476 |
|
|
move.w 4(sp),-(a6) ;Push SR |
| 477 |
|
|
subq.l #4,a6 ;Skip saved USP |
| 478 |
|
|
move.l (sp),-(a6) ;Push old a6 |
| 479 |
|
|
movem.l d0-d7/a0-a5,-(a6) ;Push remaining registers |
| 480 |
|
|
move.l a6,usp ;Update USP |
| 481 |
|
|
|
| 482 |
|
|
add.w #12,sp ;Remove exception frame from supervisor stack |
| 483 |
|
|
andi #$d8ff,sr ;Switch to user mode, enable interrupts |
| 484 |
|
|
|
| 485 |
|
|
move.l a6,-(sp) ;Jump to PrivViolHandler() in main.cpp |
| 486 |
|
|
jsr _PrivViolHandler |
| 487 |
|
|
addq.l #4,sp |
| 488 |
|
|
|
| 489 |
|
|
movem.l (sp)+,d0-d7/a0-a6 ;Restore registers |
| 490 |
|
|
addq.l #4,sp ;Skip saved USP |
| 491 |
|
|
rtr ;Return from exception |
| 492 |
|
|
|
| 493 |
|
|
; move sr,-(sp) |
| 494 |
|
|
pushsr move.l a0,-(sp) ;Save a0 |
| 495 |
|
|
move.l usp,a0 ;Get user stack pointer |
| 496 |
|
|
move.w 8(sp),d0 ;Get CCR from exception stack frame |
| 497 |
|
|
or.w _EmulatedSR,d0 ;Add emulated supervisor bits |
| 498 |
|
|
move.w d0,-(a0) ;Store SR on user stack |
| 499 |
|
|
move.l a0,usp ;Update USP |
| 500 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 501 |
|
|
move.l (sp)+,d0 ;Restore d0 |
| 502 |
|
|
addq.l #2,2(sp) ;Skip instruction |
| 503 |
|
|
rte |
| 504 |
|
|
|
| 505 |
|
|
; move (sp)+,sr |
| 506 |
|
|
popsr move.l a0,-(sp) ;Save a0 |
| 507 |
|
|
move.l usp,a0 ;Get user stack pointer |
| 508 |
|
|
move.w (a0)+,d0 ;Get SR from user stack |
| 509 |
|
|
move.w d0,8(sp) ;Store into CCR on exception stack frame |
| 510 |
|
|
and.w #$00ff,8(sp) |
| 511 |
|
|
and.w #$2700,d0 ;Extract supervisor bits |
| 512 |
|
|
move.w d0,_EmulatedSR ;And save them |
| 513 |
|
|
|
| 514 |
|
|
and.w #$0700,d0 ;Rethrow exception if interrupts are pending and reenabled |
| 515 |
|
|
bne 1$ |
| 516 |
|
|
tst.l _InterruptFlags |
| 517 |
|
|
beq 1$ |
| 518 |
|
|
movem.l d0-d1/a0-a1/a6,-(sp) |
| 519 |
|
|
move.l _SysBase,a6 |
| 520 |
|
|
move.l _MainTask,a1 |
| 521 |
|
|
move.l _IRQSigMask,d0 |
| 522 |
|
|
JSRLIB Signal |
| 523 |
|
|
movem.l (sp)+,d0-d1/a0-a1/a6 |
| 524 |
|
|
1$ |
| 525 |
|
|
move.l a0,usp ;Update USP |
| 526 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 527 |
|
|
move.l (sp)+,d0 ;Restore d0 |
| 528 |
|
|
addq.l #2,2(sp) ;Skip instruction |
| 529 |
|
|
rte |
| 530 |
|
|
|
| 531 |
|
|
; ori #xxxx,sr |
| 532 |
|
|
orisr move.w 4(sp),d0 ;Get CCR from stack |
| 533 |
|
|
or.w _EmulatedSR,d0 ;Add emulated supervisor bits |
| 534 |
|
|
or.w ([6,sp],2),d0 ;Or with immediate value |
| 535 |
|
|
move.w d0,4(sp) ;Store into CCR on stack |
| 536 |
|
|
and.w #$00ff,4(sp) |
| 537 |
|
|
and.w #$2700,d0 ;Extract supervisor bits |
| 538 |
|
|
move.w d0,_EmulatedSR ;And save them |
| 539 |
|
|
move.l (sp)+,d0 ;Restore d0 |
| 540 |
|
|
addq.l #4,2(sp) ;Skip instruction |
| 541 |
|
|
rte |
| 542 |
|
|
|
| 543 |
|
|
; andi #xxxx,sr |
| 544 |
|
|
andisr move.w 4(sp),d0 ;Get CCR from stack |
| 545 |
|
|
or.w _EmulatedSR,d0 ;Add emulated supervisor bits |
| 546 |
|
|
and.w ([6,sp],2),d0 ;And with immediate value |
| 547 |
|
|
storesr4 move.w d0,4(sp) ;Store into CCR on stack |
| 548 |
|
|
and.w #$00ff,4(sp) |
| 549 |
|
|
and.w #$2700,d0 ;Extract supervisor bits |
| 550 |
|
|
move.w d0,_EmulatedSR ;And save them |
| 551 |
|
|
|
| 552 |
|
|
and.w #$0700,d0 ;Rethrow exception if interrupts are pending and reenabled |
| 553 |
|
|
bne.s 1$ |
| 554 |
|
|
tst.l _InterruptFlags |
| 555 |
|
|
beq.s 1$ |
| 556 |
|
|
movem.l d0-d1/a0-a1/a6,-(sp) |
| 557 |
|
|
move.l _SysBase,a6 |
| 558 |
|
|
move.l _MainTask,a1 |
| 559 |
|
|
move.l _IRQSigMask,d0 |
| 560 |
|
|
JSRLIB Signal |
| 561 |
|
|
movem.l (sp)+,d0-d1/a0-a1/a6 |
| 562 |
|
|
1$ move.l (sp)+,d0 ;Restore d0 |
| 563 |
|
|
addq.l #4,2(sp) ;Skip instruction |
| 564 |
|
|
rte |
| 565 |
|
|
|
| 566 |
|
|
; move #xxxx,sr |
| 567 |
|
|
movetosrimm move.w ([6,sp],2),d0 ;Get immediate value |
| 568 |
|
|
bra.s storesr4 |
| 569 |
|
|
|
| 570 |
|
|
; move (xxxx,sp),sr |
| 571 |
|
|
movetosrsprel move.l a0,-(sp) ;Save a0 |
| 572 |
|
|
move.l usp,a0 ;Get user stack pointer |
| 573 |
|
|
move.w ([10,sp],2),d0 ;Get offset |
| 574 |
|
|
move.w (a0,d0.w),d0 ;Read word |
| 575 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 576 |
|
|
bra.s storesr4 |
| 577 |
|
|
|
| 578 |
|
|
; move (a0)+,sr |
| 579 |
|
|
movetosra0p move.w (a0)+,d0 ;Read word |
| 580 |
|
|
bra storesr2 |
| 581 |
|
|
|
| 582 |
|
|
; move (a1)+,sr |
| 583 |
|
|
movetosra1p move.w (a1)+,d0 ;Read word |
| 584 |
|
|
bra storesr2 |
| 585 |
|
|
|
| 586 |
|
|
; move sr,xxxx.w |
| 587 |
|
|
movefromsrabs move.l a0,-(sp) ;Save a0 |
| 588 |
|
|
move.w ([10,sp],2),a0 ;Get address |
| 589 |
|
|
move.w 8(sp),d0 ;Get CCR |
| 590 |
|
|
or.w _EmulatedSR,d0 ;Add emulated supervisor bits |
| 591 |
|
|
move.w d0,(a0) ;Store SR |
| 592 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 593 |
|
|
move.l (sp)+,d0 ;Restore d0 |
| 594 |
|
|
addq.l #4,2(sp) ;Skip instruction |
| 595 |
|
|
rte |
| 596 |
|
|
|
| 597 |
|
|
; move sr,(a0) |
| 598 |
|
|
movefromsra0 move.w 4(sp),d0 ;Get CCR |
| 599 |
|
|
or.w _EmulatedSR,d0 ;Add emulated supervisor bits |
| 600 |
|
|
move.w d0,(a0) ;Store SR |
| 601 |
|
|
move.l (sp)+,d0 ;Restore d0 |
| 602 |
|
|
addq.l #2,2(sp) ;Skip instruction |
| 603 |
|
|
rte |
| 604 |
|
|
|
| 605 |
|
|
; move sr,(sp) |
| 606 |
|
|
movefromsrsp move.l a0,-(sp) ;Save a0 |
| 607 |
|
|
move.l usp,a0 ;Get user stack pointer |
| 608 |
|
|
move.w 8(sp),d0 ;Get CCR |
| 609 |
|
|
or.w _EmulatedSR,d0 ;Add emulated supervisor bits |
| 610 |
|
|
move.w d0,(a0) ;Store SR |
| 611 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 612 |
|
|
move.l (sp)+,d0 ;Restore d0 |
| 613 |
|
|
addq.l #2,2(sp) ;Skip instruction |
| 614 |
|
|
rte |
| 615 |
|
|
|
| 616 |
|
|
; fsave -(sp) |
| 617 |
|
|
fsavepush move.l (sp),d0 ;Restore d0 |
| 618 |
|
|
move.l a0,(sp) ;Save a0 |
| 619 |
|
|
move.l usp,a0 ;Get user stack pointer |
| 620 |
|
|
fsave -(a0) ;Push FP state |
| 621 |
|
|
move.l a0,usp ;Update USP |
| 622 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 623 |
|
|
addq.l #2,2(sp) ;Skip instruction |
| 624 |
|
|
rte |
| 625 |
|
|
|
| 626 |
|
|
; frestore (sp)+ |
| 627 |
|
|
frestorepop move.l (sp),d0 ;Restore d0 |
| 628 |
|
|
move.l a0,(sp) ;Save a0 |
| 629 |
|
|
move.l usp,a0 ;Get user stack pointer |
| 630 |
|
|
frestore (a0)+ ;Restore FP state |
| 631 |
|
|
move.l a0,usp ;Update USP |
| 632 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 633 |
|
|
addq.l #2,2(sp) ;Skip instruction |
| 634 |
|
|
rte |
| 635 |
|
|
|
| 636 |
|
|
; rte (only handles format 0) |
| 637 |
|
|
pvrte move.l a0,-(sp) ;Save a0 |
| 638 |
|
|
move.l usp,a0 ;Get user stack pointer |
| 639 |
|
|
move.w (a0)+,d0 ;Get SR from user stack |
| 640 |
|
|
move.w d0,8(sp) ;Store into CCR on exception stack frame |
| 641 |
|
|
and.w #$00ff,8(sp) |
| 642 |
|
|
and.w #$2700,d0 ;Extract supervisor bits |
| 643 |
|
|
move.w d0,_EmulatedSR ;And save them |
| 644 |
|
|
move.l (a0)+,10(sp) ;Store return address in exception stack frame |
| 645 |
|
|
addq.l #2,a0 ;Skip format word |
| 646 |
|
|
move.l a0,usp ;Update USP |
| 647 |
|
|
move.l (sp)+,a0 ;Restore a0 |
| 648 |
|
|
move.l (sp)+,d0 ;Restore d0 |
| 649 |
|
|
rte |
| 650 |
|
|
|
| 651 |
|
|
; move sr,dx |
| 652 |
|
|
movefromsrd0 addq.l #4,sp ;Skip saved d0 |
| 653 |
|
|
moveq #0,d0 |
| 654 |
|
|
move.w (sp),d0 ;Get CCR |
| 655 |
|
|
or.w _EmulatedSR,d0 ;Add emulated supervisor bits |
| 656 |
|
|
addq.l #2,2(sp) ;Skip instruction |
| 657 |
|
|
rte |
| 658 |
|
|
|
| 659 |
|
|
movefromsrd1 move.l (sp)+,d0 |
| 660 |
|
|
moveq #0,d1 |
| 661 |
|
|
move.w (sp),d1 |
| 662 |
|
|
or.w _EmulatedSR,d1 |
| 663 |
|
|
addq.l #2,2(sp) |
| 664 |
|
|
rte |
| 665 |
|
|
|
| 666 |
|
|
movefromsrd2 move.l (sp)+,d0 |
| 667 |
|
|
moveq #0,d2 |
| 668 |
|
|
move.w (sp),d2 |
| 669 |
|
|
or.w _EmulatedSR,d2 |
| 670 |
|
|
addq.l #2,2(sp) |
| 671 |
|
|
rte |
| 672 |
|
|
|
| 673 |
|
|
movefromsrd3 move.l (sp)+,d0 |
| 674 |
|
|
moveq #0,d3 |
| 675 |
|
|
move.w (sp),d3 |
| 676 |
|
|
or.w _EmulatedSR,d3 |
| 677 |
|
|
addq.l #2,2(sp) |
| 678 |
|
|
rte |
| 679 |
|
|
|
| 680 |
|
|
movefromsrd4 move.l (sp)+,d0 |
| 681 |
|
|
moveq #0,d4 |
| 682 |
|
|
move.w (sp),d4 |
| 683 |
|
|
or.w _EmulatedSR,d4 |
| 684 |
|
|
addq.l #2,2(sp) |
| 685 |
|
|
rte |
| 686 |
|
|
|
| 687 |
|
|
movefromsrd5 move.l (sp)+,d0 |
| 688 |
|
|
moveq #0,d5 |
| 689 |
|
|
move.w (sp),d5 |
| 690 |
|
|
or.w _EmulatedSR,d5 |
| 691 |
|
|
addq.l #2,2(sp) |
| 692 |
|
|
rte |
| 693 |
|
|
|
| 694 |
|
|
movefromsrd6 move.l (sp)+,d0 |
| 695 |
|
|
moveq #0,d6 |
| 696 |
|
|
move.w (sp),d6 |
| 697 |
|
|
or.w _EmulatedSR,d6 |
| 698 |
|
|
addq.l #2,2(sp) |
| 699 |
|
|
rte |
| 700 |
|
|
|
| 701 |
|
|
movefromsrd7 move.l (sp)+,d0 |
| 702 |
|
|
moveq #0,d7 |
| 703 |
|
|
move.w (sp),d7 |
| 704 |
|
|
or.w _EmulatedSR,d7 |
| 705 |
|
|
addq.l #2,2(sp) |
| 706 |
|
|
rte |
| 707 |
|
|
|
| 708 |
|
|
; move dx,sr |
| 709 |
|
|
movetosrd0 move.l (sp),d0 |
| 710 |
|
|
storesr2 move.w d0,4(sp) |
| 711 |
|
|
and.w #$00ff,4(sp) |
| 712 |
|
|
and.w #$2700,d0 |
| 713 |
|
|
move.w d0,_EmulatedSR |
| 714 |
|
|
|
| 715 |
|
|
and.w #$0700,d0 ;Rethrow exception if interrupts are pending and reenabled |
| 716 |
|
|
bne.s 1$ |
| 717 |
|
|
tst.l _InterruptFlags |
| 718 |
|
|
beq.s 1$ |
| 719 |
|
|
movem.l d0-d1/a0-a1/a6,-(sp) |
| 720 |
|
|
move.l _SysBase,a6 |
| 721 |
|
|
move.l _MainTask,a1 |
| 722 |
|
|
move.l _IRQSigMask,d0 |
| 723 |
|
|
JSRLIB Signal |
| 724 |
|
|
movem.l (sp)+,d0-d1/a0-a1/a6 |
| 725 |
|
|
1$ move.l (sp)+,d0 |
| 726 |
|
|
addq.l #2,2(sp) |
| 727 |
|
|
rte |
| 728 |
|
|
|
| 729 |
|
|
movetosrd1 move.l d1,d0 |
| 730 |
|
|
bra.s storesr2 |
| 731 |
|
|
|
| 732 |
|
|
movetosrd2 move.l d2,d0 |
| 733 |
|
|
bra.s storesr2 |
| 734 |
|
|
|
| 735 |
|
|
movetosrd3 move.l d3,d0 |
| 736 |
|
|
bra.s storesr2 |
| 737 |
|
|
|
| 738 |
|
|
movetosrd4 move.l d4,d0 |
| 739 |
|
|
bra.s storesr2 |
| 740 |
|
|
|
| 741 |
|
|
movetosrd5 move.l d5,d0 |
| 742 |
|
|
bra.s storesr2 |
| 743 |
|
|
|
| 744 |
|
|
movetosrd6 move.l d6,d0 |
| 745 |
|
|
bra.s storesr2 |
| 746 |
|
|
|
| 747 |
|
|
movetosrd7 move.l d7,d0 |
| 748 |
|
|
bra.s storesr2 |
| 749 |
|
|
|
| 750 |
|
|
; movec cr,x |
| 751 |
|
|
movecfromcr move.w ([6,sp],2),d0 ;Get next instruction word |
| 752 |
|
|
|
| 753 |
|
|
cmp.w #$8801,d0 ;movec vbr,a0? |
| 754 |
|
|
beq.s movecvbra0 |
| 755 |
|
|
cmp.w #$9801,d0 ;movec vbr,a1? |
| 756 |
|
|
beq.s movecvbra1 |
| 757 |
|
|
cmp.w #$0002,d0 ;movec cacr,d0? |
| 758 |
|
|
beq.s moveccacrd0 |
| 759 |
|
|
cmp.w #$1002,d0 ;movec cacr,d1? |
| 760 |
|
|
beq.s moveccacrd1 |
| 761 |
|
|
cmp.w #$0003,d0 ;movec tc,d0? |
| 762 |
|
|
beq.s movectcd0 |
| 763 |
|
|
cmp.w #$1003,d0 ;movec tc,d1? |
| 764 |
|
|
beq.s movectcd1 |
| 765 |
|
|
|
| 766 |
|
|
bra pv_unhandled |
| 767 |
|
|
|
| 768 |
|
|
; movec cacr,d0 |
| 769 |
|
|
moveccacrd0 move.l (sp)+,d0 |
| 770 |
|
|
move.l #$3111,d0 ;All caches and bursts on |
| 771 |
|
|
addq.l #4,2(sp) |
| 772 |
|
|
rte |
| 773 |
|
|
|
| 774 |
|
|
; movec cacr,d1 |
| 775 |
|
|
moveccacrd1 move.l (sp)+,d0 |
| 776 |
|
|
move.l #$3111,d1 ;All caches and bursts on |
| 777 |
|
|
addq.l #4,2(sp) |
| 778 |
|
|
rte |
| 779 |
|
|
|
| 780 |
|
|
; movec vbr,a0 |
| 781 |
|
|
movecvbra0 move.l (sp)+,d0 |
| 782 |
|
|
sub.l a0,a0 ;VBR always appears to be at 0 |
| 783 |
|
|
addq.l #4,2(sp) |
| 784 |
|
|
rte |
| 785 |
|
|
|
| 786 |
|
|
; movec vbr,a1 |
| 787 |
|
|
movecvbra1 move.l (sp)+,d0 |
| 788 |
|
|
sub.l a1,a1 ;VBR always appears to be at 0 |
| 789 |
|
|
addq.l #4,2(sp) |
| 790 |
|
|
rte |
| 791 |
|
|
|
| 792 |
|
|
; movec tc,d0 |
| 793 |
|
|
movectcd0 addq.l #4,sp |
| 794 |
|
|
moveq #0,d0 ;MMU is always off |
| 795 |
|
|
addq.l #4,2(sp) |
| 796 |
|
|
rte |
| 797 |
|
|
|
| 798 |
|
|
; movec tc,d1 |
| 799 |
|
|
movectcd1 addq.l #4,sp |
| 800 |
|
|
moveq #0,d1 ;MMU is always off |
| 801 |
|
|
addq.l #4,2(sp) |
| 802 |
|
|
rte |
| 803 |
|
|
|
| 804 |
|
|
; movec x,cr |
| 805 |
|
|
movectocr move.w ([6,sp],2),d0 ;Get next instruction word |
| 806 |
|
|
|
| 807 |
|
|
cmp.w #$0801,d0 ;movec d0,vbr? |
| 808 |
|
|
beq.s movectovbr |
| 809 |
|
|
cmp.w #$0002,d0 ;movec d0,cacr? |
| 810 |
|
|
beq.s movectocacr |
| 811 |
|
|
cmp.w #$1002,d0 ;movec d1,cacr? |
| 812 |
|
|
beq.s movectocacr |
| 813 |
|
|
|
| 814 |
|
|
bra pv_unhandled |
| 815 |
|
|
|
| 816 |
|
|
; movec x,vbr |
| 817 |
|
|
movectovbr move.l (sp)+,d0 ;Ignore moves to VBR |
| 818 |
|
|
addq.l #4,2(sp) |
| 819 |
|
|
rte |
| 820 |
|
|
|
| 821 |
|
|
; movec dx,cacr |
| 822 |
|
|
movectocacr movem.l d1/a0-a1/a6,-(sp) ;Move to CACR, clear caches |
| 823 |
|
|
move.l _SysBase,a6 |
| 824 |
|
|
JSRLIB CacheClearU |
| 825 |
|
|
movem.l (sp)+,d1/a0-a1/a6 |
| 826 |
|
|
move.l (sp)+,d0 |
| 827 |
|
|
addq.l #4,2(sp) |
| 828 |
|
|
rte |
| 829 |
|
|
|
| 830 |
|
|
; cpusha |
| 831 |
|
|
cpushadc |
| 832 |
|
|
cpushadcic movem.l d1/a0-a1/a6,-(sp) ;Clear caches |
| 833 |
|
|
move.l _SysBase,a6 |
| 834 |
|
|
JSRLIB CacheClearU |
| 835 |
|
|
movem.l (sp)+,d1/a0-a1/a6 |
| 836 |
|
|
move.l (sp)+,d0 |
| 837 |
|
|
addq.l #2,2(sp) |
| 838 |
|
|
rte |
| 839 |
|
|
|
| 840 |
|
|
END |
