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Revise communication between hw & sw interrupt handler. 

Deal with sun4m software interrupt mechanism.
This commit is contained in:
pk 1996-12-08 23:41:39 +00:00
parent 837dd8e3e1
commit 10a182e399
1 changed files with 38 additions and 8 deletions
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46
sys/arch/sparc/sparc/bsd_fdintr.s
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@ -1,4 +1,4 @@
/* $NetBSD: bsd_fdintr.s,v 1.8 1996/03/31 23:45:00 pk Exp $ */
/* $NetBSD: bsd_fdintr.s,v 1.9 1996/12/08 23:41:39 pk Exp $ */
/*
* Copyright (c) 1995 Paul Kranenburg
@ -33,14 +33,47 @@
#ifndef FDC_C_HANDLER
#include "assym.h"
#include <machine/param.h>
#include <machine/psl.h>
#include <sparc/sparc/intreg.h>
#include <sparc/sparc/auxreg.h>
#include <sparc/sparc/vaddrs.h>
#include <sparc/dev/fdreg.h>
#include <sparc/dev/fdvar.h>
/* XXX this goes in a header file -- currently, it's hidden in locore.s */
#define INTREG_ADDR 0xf8002000
#define FD_SET_SWINTR_4C \
sethi %hi(INTREG_ADDR), %l5; \
ldub [%l5 + %lo(INTREG_ADDR)], %l6; \
or %l6, IE_L4, %l6; \
stb %l6, [%l5 + %lo(INTREG_ADDR)]
! raise(0,PIL_AUSOFT) ! NOTE: CPU#0 and PIL_AUSOFT=4
#define FD_SET_SWINTR_4M \
sethi %hi(1 << (16 + 4)), %l5; \
set ICR_PI_SET, %l6; \
st %l5, [%l6]
/* set software interrupt */
#if defined(SUN4C) && !defined(SUN4M)
#define FD_SET_SWINTR FD_SET_SWINTR_4C
#elif !defined(SUN4C) && defined(SUN4M)
#define FD_SET_SWINTR FD_SET_SWINTR_4M
#else
#define FD_SET_SWINTR \
sethi %hi(_cputyp), %l5; \
ld [%l5 + %lo(_cputyp)], %l5; \
cmp %l5, CPU_SUN4M; \
be 8f; \
FD_SET_SWINTR_4C; \
ba,a 9f; \
8: \
FD_SET_SWINTR_4M; \
9:
#endif
/* Timeout waiting for chip ready */
#define POLL_TIMO 100000
@ -140,7 +173,7 @@ nextc:
bne,a nextc ! if (--fdc->sc_tc) goto ...
ldub [R_msr], %l7 ! get MSR value
! xfer done: update fdc->sc_buf & fdc->sc_tc, mark istate IDLE
! xfer done: update fdc->sc_buf & fdc->sc_tc, mark istate DONE
st R_tc, [R_fdc + FDC_TC]
st R_buf, [R_fdc + FDC_DATA]
@ -210,17 +243,14 @@ resultphase1:
ldub [R_msr], %l7
3:
! got status, update sc_nstat and mark istate IDLE
! got status, update sc_nstat and mark istate DONE
st R_stcnt, [R_fdc + FDC_NSTAT]
mov ISTATE_IDLE, %l7
mov ISTATE_DONE, %l7
st %l7, [R_fdc + FDC_ISTATE]
ssi:
! set software interrupt
sethi %hi(INTREG_ADDR), %l7
ldsb [%l7 + %lo(INTREG_ADDR)], %l6
or %l6, IE_L4, %l6
stb %l6, [%l7 + %lo(INTREG_ADDR)]
FD_SET_SWINTR
x:
/*