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Add fu/su functions from hp300, modified for Sun 3.

This commit is contained in:
mycroft 1995-02-08 14:50:38 +00:00
parent 56c0e01a38
commit 601e2d1b77
1 changed files with 106 additions and 1 deletions
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107
sys/arch/m68k/m68k/copy.s
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@ -1,4 +1,4 @@
/* $NetBSD: copy.s,v 1.16 1995/02/08 14:26:10 mycroft Exp $ */
/* $NetBSD: copy.s,v 1.17 1995/02/08 14:50:38 mycroft Exp $ */
/*-
* Copyright (c) 1994, 1995 Charles Hannum.
@ -273,3 +273,108 @@ cosexit:
cosfault:
moveq #EFAULT,d0
jra cosdone
/*
* {fu,su},{byte,sword,word}
*/
ENTRY(fuword)
movl sp@(4),a0 | address to read
movl _curpcb,a1 | current pcb
movl #Lferr,a1@(PCB_ONFAULT) | where to return to on a fault
USER_SFC
movsl a0@,d0 | do read from user space
jra Lfdone
ENTRY(fusword)
movl sp@(4),a0
movl _curpcb,a1 | current pcb
movl #Lferr,a1@(PCB_ONFAULT) | where to return to on a fault
USER_SFC
moveq #0,d0
movsw a0@,d0 | do read from user space
jra Lfdone
/* Just like fusword, but tells trap code not to page in. */
ENTRY(fuswintr)
movl sp@(4),a0
movl _curpcb,a1
movl #_fubail,a1@(PCB_ONFAULT)
USER_SFC
moveq #0,d0
movsw a0@,d0
jra Lfdone
ENTRY(fubyte)
movl sp@(4),a0 | address to read
movl _curpcb,a1 | current pcb
movl #Lferr,a1@(PCB_ONFAULT) | where to return to on a fault
USER_SFC
moveq #0,d0
movsb a0@,d0 | do read from user space
jra Lfdone
Lferr:
moveq #-1,d0 | error indicator
Lfdone:
KERNEL_SFC
clrl a1@(PCB_ONFAULT) | clear fault handler
rts
/* Just like Lferr, but the address is different (& exported). */
.globl _fubail
_fubail:
moveq #-1,d0
jra Lfdone
ENTRY(suword)
movl sp@(4),a0 | address to write
movl sp@(8),d1 | value to put there
movl _curpcb,a1 | current pcb
movl #Lserr,a1@(PCB_ONFAULT) | where to return to on a fault
USER_DFC
movsl d1,a0@ | do write to user space
moveq #0,d0 | indicate no fault
jra Lsdone
ENTRY(susword)
movl sp@(4),a0 | address to write
movw sp@(10),d1 | value to put there
movl _curpcb,a1 | current pcb
movl #Lserr,a1@(PCB_ONFAULT) | where to return to on a fault
USER_DFC
movsw d1,a0@ | do write to user space
moveq #0,d0 | indicate no fault
jra Lsdone
ENTRY(suswintr)
movl sp@(4),a0
movw sp@(10),d1
movl _curpcb,a1
movl #_subail,a1@(PCB_ONFAULT)
USER_DFC
movsw d1,a0@
moveq #0,d0
jra Lsdone
ENTRY(subyte)
movl sp@(4),a0 | address to write
movb sp@(11),d1 | value to put there
movl _curpcb,a1 | current pcb
movl #Lserr,a1@(PCB_ONFAULT) | where to return to on a fault
USER_DFC
movsb d1,a0@ | do write to user space
moveq #0,d0 | indicate no fault
jra Lsdone
Lserr:
moveq #-1,d0 | error indicator
Lsdone:
KERNEL_DFC
clrl a1@(PCB_ONFAULT) | clear fault handler
rts
/* Just like Lserr, but the address is different (& exported). */
.globl _subail
_subail:
moveq #-1,d0
jra Lsdone