fc81cf82e9
operands. `movw' could be used, but instead let the assembler decide the right instruction to use. 2. AT&T asm syntax requires a leading '*' in front of the operand for indirect calls and jumps.
225 lines
6.8 KiB
ArmAsm
225 lines
6.8 KiB
ArmAsm
/*
|
|
* from: vector.s, 386BSD 0.1 unknown origin
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
/*
|
|
* modified for PC98 by Kakefuda
|
|
*/
|
|
|
|
#ifdef PC98
|
|
#define ICU_IMR_OFFSET 2 /* IO_ICU{1,2} + 2 */
|
|
#else
|
|
#define ICU_IMR_OFFSET 1 /* IO_ICU{1,2} + 1 */
|
|
#endif
|
|
|
|
#define ICU_EOI 0x20 /* XXX - define elsewhere */
|
|
|
|
#define IRQ_BIT(irq_num) (1 << ((irq_num) % 8))
|
|
#define IRQ_BYTE(irq_num) ((irq_num) >> 3)
|
|
|
|
#ifdef AUTO_EOI_1
|
|
#define ENABLE_ICU1 /* use auto-EOI to reduce i/o */
|
|
#define OUTB_ICU1
|
|
#else
|
|
#define ENABLE_ICU1 \
|
|
movb $ICU_EOI,%al ; /* as soon as possible send EOI ... */ \
|
|
OUTB_ICU1 /* ... to clear in service bit */
|
|
#define OUTB_ICU1 \
|
|
outb %al,$IO_ICU1
|
|
#endif
|
|
|
|
#ifdef AUTO_EOI_2
|
|
/*
|
|
* The data sheet says no auto-EOI on slave, but it sometimes works.
|
|
*/
|
|
#define ENABLE_ICU1_AND_2 ENABLE_ICU1
|
|
#else
|
|
#define ENABLE_ICU1_AND_2 \
|
|
movb $ICU_EOI,%al ; /* as above */ \
|
|
outb %al,$IO_ICU2 ; /* but do second icu first ... */ \
|
|
OUTB_ICU1 /* ... then first icu (if !AUTO_EOI_1) */
|
|
#endif
|
|
|
|
/*
|
|
* Macros for interrupt interrupt entry, call to handler, and exit.
|
|
*/
|
|
|
|
#define FAST_INTR(irq_num, vec_name, enable_icus) \
|
|
.text ; \
|
|
SUPERALIGN_TEXT ; \
|
|
IDTVEC(vec_name) ; \
|
|
pushl %eax ; /* save only call-used registers */ \
|
|
pushl %ecx ; \
|
|
pushl %edx ; \
|
|
pushl %ds ; \
|
|
MAYBE_PUSHL_ES ; \
|
|
mov $KDSEL,%ax ; \
|
|
mov %ax,%ds ; \
|
|
MAYBE_MOVW_AX_ES ; \
|
|
FAKE_MCOUNT((4+ACTUALLY_PUSHED)*4(%esp)) ; \
|
|
pushl _intr_unit + (irq_num) * 4 ; \
|
|
call *_intr_handler + (irq_num) * 4 ; /* do the work ASAP */ \
|
|
enable_icus ; /* (re)enable ASAP (helps edge trigger?) */ \
|
|
addl $4,%esp ; \
|
|
incl _cnt+V_INTR ; /* book-keeping can wait */ \
|
|
movl _intr_countp + (irq_num) * 4,%eax ; \
|
|
incl (%eax) ; \
|
|
movl _cpl,%eax ; /* are we unmasking pending HWIs or SWIs? */ \
|
|
notl %eax ; \
|
|
andl _ipending,%eax ; \
|
|
jne 2f ; /* yes, maybe handle them */ \
|
|
1: ; \
|
|
MEXITCOUNT ; \
|
|
MAYBE_POPL_ES ; \
|
|
popl %ds ; \
|
|
popl %edx ; \
|
|
popl %ecx ; \
|
|
popl %eax ; \
|
|
iret ; \
|
|
; \
|
|
ALIGN_TEXT ; \
|
|
2: ; \
|
|
cmpb $3,_intr_nesting_level ; /* is there enough stack? */ \
|
|
jae 1b ; /* no, return */ \
|
|
movl _cpl,%eax ; \
|
|
/* XXX next line is probably unnecessary now. */ \
|
|
movl $HWI_MASK|SWI_MASK,_cpl ; /* limit nesting ... */ \
|
|
incb _intr_nesting_level ; /* ... really limit it ... */ \
|
|
sti ; /* ... to do this as early as possible */ \
|
|
MAYBE_POPL_ES ; /* discard most of thin frame ... */ \
|
|
popl %ecx ; /* ... original %ds ... */ \
|
|
popl %edx ; \
|
|
xchgl %eax,4(%esp) ; /* orig %eax; save cpl */ \
|
|
pushal ; /* build fat frame (grrr) ... */ \
|
|
pushl %ecx ; /* ... actually %ds ... */ \
|
|
pushl %es ; \
|
|
pushl %fs ; \
|
|
mov $KDSEL,%ax ; \
|
|
mov %ax,%es ; \
|
|
mov %ax,%fs ; \
|
|
movl (3+8+0)*4(%esp),%ecx ; /* ... %ecx from thin frame ... */ \
|
|
movl %ecx,(3+6)*4(%esp) ; /* ... to fat frame ... */ \
|
|
movl (3+8+1)*4(%esp),%eax ; /* ... cpl from thin frame */ \
|
|
pushl %eax ; \
|
|
subl $4,%esp ; /* junk for unit number */ \
|
|
MEXITCOUNT ; \
|
|
jmp _doreti
|
|
|
|
#define INTR(irq_num, vec_name, icu, enable_icus, reg, maybe_extra_ipending) \
|
|
.text ; \
|
|
SUPERALIGN_TEXT ; \
|
|
IDTVEC(vec_name) ; \
|
|
pushl $0 ; /* dummy error code */ \
|
|
pushl $0 ; /* dummy trap type */ \
|
|
pushal ; \
|
|
pushl %ds ; /* save our data and extra segments ... */ \
|
|
pushl %es ; \
|
|
pushl %fs ; \
|
|
mov $KDSEL,%ax ; /* ... and reload with kernel's own ... */ \
|
|
mov %ax,%ds ; /* ... early for obsolete reasons */ \
|
|
mov %ax,%es ; \
|
|
mov %ax,%fs ; \
|
|
maybe_extra_ipending ; \
|
|
movb _imen + IRQ_BYTE(irq_num),%al ; \
|
|
orb $IRQ_BIT(irq_num),%al ; \
|
|
movb %al,_imen + IRQ_BYTE(irq_num) ; \
|
|
outb %al,$icu+ICU_IMR_OFFSET ; \
|
|
enable_icus ; \
|
|
movl _cpl,%eax ; \
|
|
testb $IRQ_BIT(irq_num),%reg ; \
|
|
jne 2f ; \
|
|
incb _intr_nesting_level ; \
|
|
__CONCAT(Xresume,irq_num): ; \
|
|
FAKE_MCOUNT(13*4(%esp)) ; /* XXX late to avoid double count */ \
|
|
incl _cnt+V_INTR ; /* tally interrupts */ \
|
|
movl _intr_countp + (irq_num) * 4,%eax ; \
|
|
incl (%eax) ; \
|
|
movl _cpl,%eax ; \
|
|
pushl %eax ; \
|
|
pushl _intr_unit + (irq_num) * 4 ; \
|
|
orl _intr_mask + (irq_num) * 4,%eax ; \
|
|
movl %eax,_cpl ; \
|
|
sti ; \
|
|
call *_intr_handler + (irq_num) * 4 ; \
|
|
cli ; /* must unmask _imen and icu atomically */ \
|
|
movb _imen + IRQ_BYTE(irq_num),%al ; \
|
|
andb $~IRQ_BIT(irq_num),%al ; \
|
|
movb %al,_imen + IRQ_BYTE(irq_num) ; \
|
|
outb %al,$icu+ICU_IMR_OFFSET ; \
|
|
sti ; /* XXX _doreti repeats the cli/sti */ \
|
|
MEXITCOUNT ; \
|
|
/* We could usually avoid the following jmp by inlining some of */ \
|
|
/* _doreti, but it's probably better to use less cache. */ \
|
|
jmp _doreti ; \
|
|
; \
|
|
ALIGN_TEXT ; \
|
|
2: ; \
|
|
/* XXX skip mcounting here to avoid double count */ \
|
|
orb $IRQ_BIT(irq_num),_ipending + IRQ_BYTE(irq_num) ; \
|
|
popl %fs ; \
|
|
popl %es ; \
|
|
popl %ds ; \
|
|
popal ; \
|
|
addl $4+4,%esp ; \
|
|
iret
|
|
|
|
MCOUNT_LABEL(bintr)
|
|
FAST_INTR(0,fastintr0, ENABLE_ICU1)
|
|
FAST_INTR(1,fastintr1, ENABLE_ICU1)
|
|
FAST_INTR(2,fastintr2, ENABLE_ICU1)
|
|
FAST_INTR(3,fastintr3, ENABLE_ICU1)
|
|
FAST_INTR(4,fastintr4, ENABLE_ICU1)
|
|
FAST_INTR(5,fastintr5, ENABLE_ICU1)
|
|
FAST_INTR(6,fastintr6, ENABLE_ICU1)
|
|
FAST_INTR(7,fastintr7, ENABLE_ICU1)
|
|
FAST_INTR(8,fastintr8, ENABLE_ICU1_AND_2)
|
|
FAST_INTR(9,fastintr9, ENABLE_ICU1_AND_2)
|
|
FAST_INTR(10,fastintr10, ENABLE_ICU1_AND_2)
|
|
FAST_INTR(11,fastintr11, ENABLE_ICU1_AND_2)
|
|
FAST_INTR(12,fastintr12, ENABLE_ICU1_AND_2)
|
|
FAST_INTR(13,fastintr13, ENABLE_ICU1_AND_2)
|
|
FAST_INTR(14,fastintr14, ENABLE_ICU1_AND_2)
|
|
FAST_INTR(15,fastintr15, ENABLE_ICU1_AND_2)
|
|
#define CLKINTR_PENDING movl $1,CNAME(clkintr_pending)
|
|
INTR(0,intr0, IO_ICU1, ENABLE_ICU1, al, CLKINTR_PENDING)
|
|
INTR(1,intr1, IO_ICU1, ENABLE_ICU1, al,)
|
|
INTR(2,intr2, IO_ICU1, ENABLE_ICU1, al,)
|
|
INTR(3,intr3, IO_ICU1, ENABLE_ICU1, al,)
|
|
INTR(4,intr4, IO_ICU1, ENABLE_ICU1, al,)
|
|
INTR(5,intr5, IO_ICU1, ENABLE_ICU1, al,)
|
|
INTR(6,intr6, IO_ICU1, ENABLE_ICU1, al,)
|
|
INTR(7,intr7, IO_ICU1, ENABLE_ICU1, al,)
|
|
INTR(8,intr8, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
INTR(9,intr9, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
INTR(10,intr10, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
INTR(11,intr11, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
INTR(12,intr12, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
INTR(13,intr13, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
INTR(14,intr14, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
INTR(15,intr15, IO_ICU2, ENABLE_ICU1_AND_2, ah,)
|
|
MCOUNT_LABEL(eintr)
|
|
|
|
.data
|
|
.globl _ihandlers
|
|
_ihandlers: /* addresses of interrupt handlers */
|
|
/* actually resumption addresses for HWI's */
|
|
.long Xresume0, Xresume1, Xresume2, Xresume3
|
|
.long Xresume4, Xresume5, Xresume6, Xresume7
|
|
.long Xresume8, Xresume9, Xresume10, Xresume11
|
|
.long Xresume12, Xresume13, Xresume14, Xresume15
|
|
.long _swi_null, swi_net, _swi_null, _swi_null
|
|
.long _swi_vm, _swi_null, _swi_null, _swi_null
|
|
.long _swi_null, _swi_null, _swi_null, _swi_null
|
|
.long _swi_null, _swi_null, _softclock, _swi_null
|
|
|
|
imasks: /* masks for interrupt handlers */
|
|
.space NHWI*4 /* padding; HWI masks are elsewhere */
|
|
|
|
.long SWI_TTY_MASK, SWI_NET_MASK, SWI_CAMNET_MASK, SWI_CAMBIO_MASK
|
|
.long SWI_VM_MASK, 0, 0, 0
|
|
.long 0, 0, 0, 0
|
|
.long 0, 0, SWI_CLOCK_MASK, 0
|
|
|
|
.text
|