sh: interrupt exception handling rework

Kill off interrupt_table for all of the CPU subtypes, we now
default in to stepping in to do_IRQ() for _all_ IRQ exceptions
and counting the spurious ones, rather than simply flipping on
the ones we cared about. This and enabling the IRQ by default
automatically has already uncovered a couple of bugs and IRQs
that weren't being caught, as well as some that are being
generated far too often (SCI Tx Data Empty, for example).

The general rationale is to use a marker for interrupt exceptions,
test for it in the handle_exception() path, and skip out to
do_IRQ() if it's found. Everything else follows the same behaviour
of finding the cached EXPEVT value in r2/r2_bank, we just rip out
the INTEVT read from entry.S entirely (except for in the kGDB NMI
case, which is another matter).

Note that while this changes the do_IRQ() semantics regarding r4
handling, they were fundamentally broken anyways (relying entirely
on r2_bank for the cached code). With this, we do the INTEVT read
from do_IRQ() itself (in the CONFIG_CPU_HAS_INTEVT case), or fall
back on r4 for the muxed IRQ number, which should also be closer
to what SH-2 and SH-2A want anyways.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 0 insertions, 195 deletions

diff --git a/arch/sh/kernel/cpu/sh3/ex.S b/arch/sh/kernel/cpu/sh3/ex.S
index 44daf44833f..6be46f0686b 100644
--- a/arch/sh/kernel/cpu/sh3/ex.S
+++ b/arch/sh/kernel/cpu/sh3/ex.S
@@ -49,198 +49,3 @@ ENTRY(nmi_slot)
 #endif
 ENTRY(user_break_point_trap)
 	.long	break_point_trap	/* 1E0 */
-ENTRY(interrupt_table)
-	! external hardware
-	.long	do_IRQ	! 0000		/* 200 */
-	.long	do_IRQ	! 0001
-	.long	do_IRQ	! 0010
-	.long	do_IRQ	! 0011
-	.long	do_IRQ	! 0100
-	.long	do_IRQ	! 0101
-	.long	do_IRQ	! 0110
-	.long	do_IRQ	! 0111
-	.long	do_IRQ	! 1000		/* 300 */
-	.long	do_IRQ	! 1001
-	.long	do_IRQ	! 1010
-	.long	do_IRQ	! 1011
-	.long	do_IRQ	! 1100
-	.long	do_IRQ	! 1101
-	.long	do_IRQ	! 1110
-	.long	exception_error		
-	! Internal hardware
-	.long	do_IRQ	! TMU0 tuni0	/* 400 */
-	.long	do_IRQ	! TMU1 tuni1
-	.long	do_IRQ	! TMU2 tuni2
-	.long	do_IRQ	!      ticpi2
-	.long	do_IRQ	! RTC  ati
-	.long	do_IRQ	!      pri
-	.long	do_IRQ	!      cui
-	.long	do_IRQ	! SCI  eri
-	.long	do_IRQ	!      rxi	/* 500 */
-	.long	do_IRQ	!      txi
-	.long	do_IRQ	!      tei
-	.long	do_IRQ	! WDT  iti	/* 560 */
-	.long	do_IRQ	! REF  rcmi
-	.long	do_IRQ	!      rovi
-	.long	do_IRQ			
-	.long	do_IRQ			/* 5E0 */
-#if  defined(CONFIG_CPU_SUBTYPE_SH7707) || \
-     defined(CONFIG_CPU_SUBTYPE_SH7709) || \
-     defined(CONFIG_CPU_SUBTYPE_SH7706) || \
-     defined(CONFIG_CPU_SUBTYPE_SH7300) || \
-     defined(CONFIG_CPU_SUBTYPE_SH7705) || \
-     defined(CONFIG_CPU_SUBTYPE_SH7710)
-	.long	do_IRQ	! 32 IRQ  irq0	/* 600 */
-	.long	do_IRQ	! 33      irq1
-	.long	do_IRQ	! 34      irq2
-	.long	do_IRQ	! 35      irq3
-	.long	do_IRQ	! 36      irq4
-	.long	do_IRQ	! 37      irq5
-	.long	do_IRQ	! 38
-	.long	do_IRQ	! 39
-	.long	do_IRQ	! 40 PINT pint0-7	/* 700 */
-	.long	do_IRQ	! 41      pint8-15
-	.long	do_IRQ	! 42
-	.long	do_IRQ	! 43
-	.long	do_IRQ	! 44
-	.long	do_IRQ	! 45	
-	.long	do_IRQ	! 46
-	.long	do_IRQ	! 47
-	.long	do_IRQ	! 48 DMAC dei0	/* 800 */
-	.long	do_IRQ	! 49      dei1
-	.long	do_IRQ	! 50      dei2
-	.long	do_IRQ	! 51      dei3
-	.long	do_IRQ	! 52 IrDA eri1
-	.long	do_IRQ	! 53      rxi1
-	.long	do_IRQ	! 54      bri1
-	.long	do_IRQ	! 55      txi1
-	.long	do_IRQ	! 56 SCIF eri2
-	.long	do_IRQ	! 57      rxi2
-	.long	do_IRQ	! 58      bri2
-	.long	do_IRQ	! 59      txi2
-	.long	do_IRQ	! 60 ADC  adi	/* 980 */
-#if defined(CONFIG_CPU_SUBTYPE_SH7705)
-	.long	exception_none	! 61	/* 9A0 */
-	.long	exception_none	! 62
-	.long	exception_none	! 63
-	.long	exception_none	! 64	/* A00 */
-	.long	do_IRQ	! 65 USB  usi0
-	.long	do_IRQ	! 66      usi1
-	.long	exception_none	! 67
-	.long	exception_none	! 68
-	.long	exception_none	! 69
-	.long	exception_none	! 70
-	.long	exception_none	! 71
-	.long	exception_none	! 72	/* B00 */
-	.long	exception_none	! 73
-	.long	exception_none	! 74
-	.long	exception_none	! 75
-	.long	exception_none	! 76
-	.long	exception_none	! 77
-	.long	exception_none	! 78
-	.long	exception_none	! 79
-	.long	do_IRQ	! 80 TPU0 tpi0	/* C00 */
-	.long	do_IRQ	! 81 TPU1 tpi1
-	.long	exception_none	! 82
-	.long	exception_none	! 83
-	.long	do_IRQ	! 84 TPU2 tpi2
-	.long	do_IRQ	! 85 TPU3 tpi3	/* CA0 */
-#endif
-#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7300)
-	.long   do_IRQ	! 61 LCDC lcdi	/* 9A0 */
-	.long   do_IRQ	! 62 PCC  pcc0i
-	.long   do_IRQ	! 63      pcc1i	/* 9E0 */
-#endif
-#if defined(CONFIG_CPU_SUBTYPE_SH7710)
-	.long   exception_none	! 61 	/* 9A0 */
-	.long   exception_none	! 62
-	.long   exception_none	! 63
-	.long   exception_none	! 64	/* A00 */
-	.long   exception_none	! 65
-	.long   exception_none	! 66
-	.long   exception_none	! 67
-	.long   exception_none	! 68
-	.long   exception_none	! 69
-	.long   exception_none	! 70
-	.long   exception_none	! 71
-	.long   exception_none	! 72	/* B00 */
-	.long   exception_none	! 73
-	.long   exception_none	! 74
-	.long   exception_none	! 75
-	.long   do_IRQ	! 76 DMAC2 dei4	/* B80 */
-	.long   do_IRQ	! 77 DMAC2 dei5
-	.long   exception_none	! 78
-	.long   do_IRQ	! 79 IPSEC ipseci /* BE0 */
-	.long   do_IRQ	! 80 EDMAC eint0 /* C00 */
-	.long   do_IRQ	! 81 EDMAC eint1
-	.long   do_IRQ	! 82 EDMAC eint2
-	.long   exception_none	! 83	/* C60 */
-	.long   exception_none	! 84
-	.long   exception_none	! 85
-	.long   exception_none	! 86
-	.long   exception_none	! 87
-	.long   exception_none	! 88	/* D00 */
-	.long   exception_none	! 89
-	.long   exception_none	! 90
-	.long   exception_none	! 91
-	.long   exception_none	! 92
-	.long   exception_none	! 93
-	.long   exception_none	! 94
-	.long   exception_none	! 95
-	.long   do_IRQ	! 96 SIOF eri0	/* E00 */
-	.long   do_IRQ	! 97      txi0
-	.long   do_IRQ	! 98      rxi0
-	.long   do_IRQ	! 99      cci0
-	.long   do_IRQ	! 100     eri1	/* E80 */
-	.long   do_IRQ	! 101     txi1
-	.long   do_IRQ	! 102     rxi2
-	.long   do_IRQ	! 103     cci3
-#endif
-#if defined(CONFIG_CPU_SUBTYPE_SH7300)
-	.long   do_IRQ	! 64
-	.long   do_IRQ	! 65
-	.long   do_IRQ	! 66
-	.long   do_IRQ	! 67
-	.long   do_IRQ	! 68
-	.long   do_IRQ	! 69
-	.long   do_IRQ	! 70
-	.long   do_IRQ	! 71
-	.long   do_IRQ	! 72
-	.long   do_IRQ	! 73
-	.long   do_IRQ	! 74
-	.long   do_IRQ	! 75
-	.long   do_IRQ	! 76
-	.long   do_IRQ	! 77
-	.long   do_IRQ	! 78
-	.long   do_IRQ	! 79
-	.long   do_IRQ	! 80 SCIF0(SH7300)
-	.long   do_IRQ	! 81
-	.long   do_IRQ	! 82
-	.long   do_IRQ	! 83
-	.long   do_IRQ	! 84
-	.long   do_IRQ	! 85
-	.long   do_IRQ	! 86
-	.long   do_IRQ	! 87
-	.long   do_IRQ	! 88
-	.long   do_IRQ	! 89
-	.long   do_IRQ	! 90
-	.long   do_IRQ	! 91
-	.long   do_IRQ	! 92
-	.long   do_IRQ	! 93
-	.long   do_IRQ	! 94
-	.long   do_IRQ	! 95
-	.long   do_IRQ	! 96
-	.long   do_IRQ	! 97
-	.long   do_IRQ	! 98
-	.long   do_IRQ	! 99
-	.long   do_IRQ	! 100
-	.long   do_IRQ	! 101
-	.long   do_IRQ	! 102
-	.long   do_IRQ	! 103
-	.long   do_IRQ	! 104
-	.long   do_IRQ	! 105
-	.long   do_IRQ	! 106
-	.long   do_IRQ	! 107
-	.long   do_IRQ	! 108
-#endif
-#endif