Re: port-sparc/42192: cannot access floppy on SPARCstation 1+

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

The following reply was made to PR port-sparc/42192; it has been noted by GNATS.

From: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: port-sparc-maintainer%NetBSD.org@localhost, 
gnats-admin%NetBSD.org@localhost,
        netbsd-bugs%NetBSD.org@localhost, tsutsui%ceres.dti.ne.jp@localhost
Subject: Re: port-sparc/42192: cannot access floppy on SPARCstation 1+
Date: Sun, 18 Oct 2009 15:39:32 +0900

 >Synopsis:       cannot access floppy on SPARCstation 1+
 >Fix:
 > One possibility is around MI softint(9) changes after 4.0?
 
 It looks sys/arch/sparc/sparc/bsd_fdintr.s still has
 old MD softintr stuff so it should be updated to
 newer MI softint(9) API.
 
 sys/arch/sparc/sparc/amd7930intr.s has the same problem.
 
 I've tried the following dumb patch but it causes a weird panic,
 so maybe I hope someone[tm] who knows sparc asm take a look at this..
 
 ---
 Index: dev/fd.c
 ===================================================================
 RCS file: /cvsroot/src/sys/arch/sparc/dev/fd.c,v
 retrieving revision 1.146
 diff -u -r1.146 fd.c
 --- dev/fd.c   25 May 2009 19:22:53 -0000      1.146
 +++ dev/fd.c   18 Oct 2009 06:29:10 -0000
 @@ -210,6 +210,7 @@
  };
  
  extern        struct fdcio    *fdciop;        /* I/O descriptor used in 
fdintr.s */
 +extern        void            *fdc_sicookie;  /* si cookie used in fdintr.s */
  
  /* controller driver configuration */
  int   fdcmatch_mainbus(struct device *, struct cfdata *, void *);
 @@ -651,6 +652,7 @@
                        fdc->sc_dev.dv_xname);
                return (-1);
        }
 +      fdc_sicookie = fdc->sc_sicookie;
        printf(" softpri %d: chip 8207%c\n", IPL_SOFTFDC, code);
  
        evcnt_attach_dynamic(&fdc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
 Index: sparc/bsd_fdintr.s
 ===================================================================
 RCS file: /cvsroot/src/sys/arch/sparc/sparc/bsd_fdintr.s,v
 retrieving revision 1.27
 diff -u -r1.27 bsd_fdintr.s
 --- sparc/bsd_fdintr.s 17 Oct 2007 19:57:14 -0000      1.27
 +++ sparc/bsd_fdintr.s 18 Oct 2009 06:29:10 -0000
 @@ -43,6 +43,7 @@
  #include <sparc/dev/fdreg.h>
  #include <sparc/dev/fdvar.h>
  
 +#if 0
  #define FD_SET_SWINTR_4C                              \
        sethi   %hi(INTRREG_VA), %l5;                   \
        ldub    [%l5 + %lo(INTRREG_VA)], %l6;           \
 @@ -72,6 +73,12 @@
        FD_SET_SWINTR_4M;                               \
  9:
  #endif
 +#else
 +#define FD_SET_SWINTR                                 \
 +      sethi   %hi(_C_LABEL(fdc_sicookie)), %l5;       \
 +      call    _C_LABEL(softint_schedule);             \
 +       ld     [%l5 + %lo(_C_LABEL(fdc_sicookie))], %o0;
 +#endif
  
  ! flip TC bit in auxreg
  ! assumes %l6 remains unchanged between ASSERT and DEASSERT
 @@ -158,6 +165,9 @@
        .global _C_LABEL(fdciop)
  _C_LABEL(fdciop):
        .word   0
 +      .global _C_LABEL(fdc_sicookie)
 +_C_LABEL(fdc_sicookie):
 +      .word   0
  
        .seg    "text"
        .align  4
 
 ---
 NetBSD 5.99.20 (GENERIC) #97: Sun Oct 18 15:29:36 JST 2009
         tsutsui@mirage:/usr/src/sys/arch/sparc/compile/GENERIC
 total memory = 65484 KB
 avail memory = 59544 KB
 
  :
 
 # dd if=/dev/rfd0a | tar ztvf -
 drwxr-xr-x  2 root     wheel          0 Dec 16  2007 .
 drwxr-xr-x  2 root     wheel          0 Dec 16  2007 ./bin
 -r-xr-xr-x  1 root     wheel    2045616 Dec 16  2007 ./bin/cat
 trap type 0x7: pc=0xf01472c0 npc=0xf01472c4 psr=0x4000c4<S,PS>
 kernel: alignment fault trap
 Stopped in pid 0.2 (system) at  netbsd:kpreempt_enable+0x8:     ld             
 [
 %g1 + 0x1bc], %g2
 db> tr
 kpreempt_enable(0xf36aad20, 0xf36aad20, 0x0, 0xba5e187d, 0x3e06748c, 
0xb781dc6d)
  at netbsd:sched_curcpu_runnable_p+0x3c
 sched_curcpu_runnable_p(0x0, 0x0, 0xc, 0x0, 0xffff, 0x400fe0) at 
netbsd:idle_loo
 p+0x120
 idle_loop(0xf36aad20, 0xf36aad20, 0xf03dd800, 0xf02ad400, 0x0, 0x897) at 
netbsd:
 lwp_setfunc_trampoline
 db> examine/i f01472bc
 netbsd:kpreempt_enable+0x4:     sethi           %hi(0xf0002000), %g1
 db> examine/i f01472c0
 netbsd:kpreempt_enable+0x8:     ld              [%g1 + 0x1bc], %g2
 db> examine/i f01472c4
 netbsd:kpreempt_enable+0xc:     ld              [%g2 + 0x1f8], %g1
 db> show reg
 psr         0x4000c4
 pc          0xf01472c0  kpreempt_enable+0x8
 npc         0xf01472c4  kpreempt_enable+0xc
 y           0
 wim         0x10c6
 g0          0
 g1          0x4000c3
 g2          0xf36aad20
 g3          0xf0002000
 g4          0xf36aad20
 g5          0xffffffff
 g6          0xf3a47000
 g7          0
 o0          0x1
 o1          0xf02875b4  statintr_4
 o2          0xf0002000
 o3          0
 o4          0
 o5          0xb00
 o6          0xf3a48e18
 o7          0xf0008b4c  sparc_interrupt44c+0x130
 l0          0xc5
 l1          0xf013e560  sched_curcpu_runnable_p+0x44
 l2          0xf013e564  sched_curcpu_runnable_p+0x48
 l3          0xf4071600
 l4          0
 l5          0x1
 l6          0xfe00e000
 l7          0xf0398630  ppp_bsd_compress+0x44
 i0          0xf36aad20
 i1          0xf36aad20
 i2          0
 i3          0xba5e187d
 i4          0x3e06748c
 i5          0xb781dc6d
 i6          0xf3a48e80
 i7          0xf013e558  sched_curcpu_runnable_p+0x3c
 netbsd:kpreempt_enable+0x8:     ld              [%g1 + 0x1bc], %g2
 db> 
 
 ---
 Izumi Tsutsui