ELF abaption.
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thomas
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e97e2309f0
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@ -1,4 +1,4 @@
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/* $NetBSD: hdfd_intr.s,v 1.6 1999/03/24 05:50:58 mrg Exp $
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/* $NetBSD: hdfd_intr.s,v 1.7 2001/09/08 11:15:35 thomas Exp $
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/*
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* Copyright (c) 1996 Leo Weppelman.
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@ -43,82 +43,81 @@
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#include <atari/dev/hdfdreg.h>
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.text
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.globl _fddmaaddr
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.globl _fdio_addr,_fddmalen
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.globl _mfp_hdfd_nf, _mfp_hdfd_fifo
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.globl _C_LABEL(fddmaaddr)
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.globl _C_LABEL(fdio_addr),_C_LABEL(fddmalen)
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/*
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* Entry point when there is no fifo. Handles the read/write
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* interrupts a bit faster because it *knows* that there is only
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* one character waiting.
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*/
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_mfp_hdfd_nf:
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ENTRY_NOPROFILE(mfp_hdfd_nf)
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addql #1,nintr | add another interrupt
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moveml d0-d1/a0-a1,sp@- | Save scratch registers
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movl _fdio_addr,a0 | Get base of fdc registers
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movb a0@(fdsts),d0 | Get fdsts
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btst #5,d0 | Dma active?
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moveml %d0-%d1/%a0-%a1,%sp@- | Save scratch registers
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movl _C_LABEL(fdio_addr),%a0 | Get base of fdc registers
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movb %a0@(fdsts),%d0 | Get fdsts
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btst #5,%d0 | Dma active?
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jeq hdfdc_norm | No, normal interrupt
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tstl _fddmalen | Bytecount zero?
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tstl _C_LABEL(fddmalen) | Bytecount zero?
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jeq hdfdc_norm | Yes -> normal interrupt
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movl _fddmaaddr, a1 | a1 = dmabuffer
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btst #6,d0 | Read?
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movl _C_LABEL(fddmaaddr),%a1 | a1 = dmabuffer
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btst #6,%d0 | Read?
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jeq hdfd_wrt_nf | No, write
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hdfd_rd_nf:
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movb a0@(fddata),a1@+ | Get a byte
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movb %a0@(fddata),%a1@+ | Get a byte
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1:
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subql #1, _fddmalen | decrement bytecount
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movl a1,_fddmaaddr | update dma pointer
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subql #1, _C_LABEL(fddmalen) | decrement bytecount
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movl %a1,_C_LABEL(fddmaaddr) | update dma pointer
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| addql #1,_cnt+V_INTR | chalk up another interrupt
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moveml sp@+,d0-d1/a0-a1
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moveml %sp@+,%d0-%d1/%a0-%a1
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rte
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hdfd_wrt_nf:
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movb a1@+,a0@(fddata) | Push a byte
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movb %a1@+,%a0@(fddata) | Push a byte
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jra 1b | And get out...
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/*
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* Systems *with* fifo's enter here.
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*/
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_mfp_hdfd_fifo:
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addql #1,_intrcnt_user+88 | add another interrupt
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ENTRY_NOPROFILE(mfp_hdfd_fifo)
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addql #1,_C_LABEL(intrcnt_user)+88 | add another interrupt
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moveml d0-d1/a0-a1,sp@- | Save scratch registers
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movl _fdio_addr,a0 | Get base of fdc registers
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movb a0@(fdsts),d0 | Get fdsts
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btst #5,d0 | Dma active?
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moveml %d0-%d1/%a0-%a1,%sp@- | Save scratch registers
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movl _C_LABEL(fdio_addr),%a0 | Get base of fdc registers
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movb %a0@(fdsts),%d0 | Get fdsts
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btst #5,%d0 | Dma active?
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jeq hdfdc_norm | No, normal interrupt
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movl _fddmaaddr, a1 | a1 = dmabuffer
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btst #6,d0 | Read?
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movl _C_LABEL(fddmaaddr),%a1 | a1 = dmabuffer
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btst #6,%d0 | Read?
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jeq hdfd_wrt | No, write
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hdfd_rd:
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tstl _fddmalen | Bytecount zero?
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tstl _C_LABEL(fddmalen) | Bytecount zero?
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jeq hdfdc1 | Yes -> done
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movb a0@(fddata),a1@+ | Get a byte
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subql #1, _fddmalen | decrement bytecount
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movb a0@(fdsts),d0 | Get fdsts
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andb #0xa0,d0 | both NE7_NDM and NE7_RQM active?
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cmpb #0xa0,d0
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movb %a0@(fddata),%a1@+ | Get a byte
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subql #1, _C_LABEL(fddmalen) | decrement bytecount
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movb %a0@(fdsts),%d0 | Get fdsts
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andb #0xa0,%d0 | both NE7_NDM and NE7_RQM active?
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cmpb #0xa0,%d0
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jne hdfdc1 | No, end of this batch
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jra hdfd_rd
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hdfd_wrt:
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tstl _fddmalen | Bytecount zero?
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tstl _C_LABEL(fddmalen) | Bytecount zero?
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jeq hdfdc1 | Yes -> done
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movb a1@+,a0@(fddata) | Push a byte
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subql #1, _fddmalen | decrement bytecount
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movb %a1@+,%a0@(fddata) | Push a byte
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subql #1, _C_LABEL(fddmalen) | decrement bytecount
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jra hdfdc1
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movb a0@(fdsts),d0 | Get fdsts
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andb #0xa0,d0 | both NE7_NDM and NE7_RQM active?
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cmpb #0xa0,d0
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movb %a0@(fdsts),%d0 | Get fdsts
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andb #0xa0,%d0 | both NE7_NDM and NE7_RQM active?
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cmpb #0xa0,%d0
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jne hdfdc1 | No, end of this batch
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jra hdfd_wrt
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hdfdc1:
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movl a1,_fddmaaddr | update buffer pointer
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btst #5,d0 | Dma still active?
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movl %a1,_C_LABEL(fddmaaddr) | update buffer pointer
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btst #5,%d0 | Dma still active?
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jeq hdfdc_norm | No -> take normal interrupt
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/*
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@ -127,7 +126,7 @@ hdfdc1:
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*/
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hdfdc_xit:
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addql #1,_C_LABEL(uvmexp)+UVMEXP_INTRS
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moveml sp@+,d0-d1/a0-a1
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moveml %sp@+,%d0-%d1/%a0-%a1
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rte
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/*
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@ -137,13 +136,13 @@ hdfdc_xit:
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hdfdc_norm:
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tstl nintr
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jeq 0f
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movl nintr,d0
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movl nintr,%d0
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clrl nintr
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addl d0, _intrcnt_user+88 | add another interrupt
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addl d0,_C_LABEL(uvmexp)+UVMEXP_INTRS
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0: jbsr _fdc_ctrl_intr | handle interrupt
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moveml sp@+,d0-d1/a0-a1 | and saved registers
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jra rei
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addl %d0, _C_LABEL(intrcnt_user)+88 | add another interrupt
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addl %d0,_C_LABEL(uvmexp)+UVMEXP_INTRS
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0: jbsr _C_LABEL(fdc_ctrl_intr) | handle interrupt
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moveml %sp@+,%d0-%d1/%a0-%a1 | and saved registers
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jra _ASM_LABEL(rei)
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.data
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nintr:
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