diff options
Diffstat (limited to 'sys/pc98/pc98/vector.s')
| -rw-r--r-- | sys/pc98/pc98/vector.s | 305 |
1 files changed, 0 insertions, 305 deletions
diff --git a/sys/pc98/pc98/vector.s b/sys/pc98/pc98/vector.s deleted file mode 100644 index cfa37ad329fc..000000000000 --- a/sys/pc98/pc98/vector.s +++ /dev/null @@ -1,305 +0,0 @@ -/* - * from: vector.s, 386BSD 0.1 unknown origin - * $Id: vector.s,v 1.1.1.1 1996/06/14 10:04:48 asami Exp $ - */ - -#include "opt_auto_eoi.h" - -/* - * modified for PC98 - * vector.s,v 1.2 1994/03/14 09:44:21 kakefuda Exp - */ - -#include <i386/isa/icu.h> -#ifdef PC98 -#include <pc98/pc98/pc98.h> -#else -#include <i386/isa/isa.h> -#endif - -#define ICU_EOI 0x20 /* XXX - define elsewhere */ - -#define IRQ_BIT(irq_num) (1 << ((irq_num) % 8)) -#define IRQ_BYTE(irq_num) ((irq_num) / 8) - -#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 - -#ifdef FAST_INTR_HANDLER_USES_ES -#define ACTUALLY_PUSHED 1 -#define MAYBE_MOVW_AX_ES movl %ax,%es -#define MAYBE_POPL_ES popl %es -#define MAYBE_PUSHL_ES pushl %es -#else -/* - * We can usually skip loading %es for fastintr handlers. %es should - * only be used for string instructions, and fastintr handlers shouldn't - * do anything slow enough to justify using a string instruction. - */ -#define ACTUALLY_PUSHED 0 -#define MAYBE_MOVW_AX_ES -#define MAYBE_POPL_ES -#define MAYBE_PUSHL_ES -#endif - -/* - * Macros for interrupt interrupt entry, call to handler, and exit. - * - * XXX - the interrupt frame is set up to look like a trap frame. This is - * usually a waste of time. The only interrupt handlers that want a frame - * are the clock handler (it wants a clock frame), the npx handler (it's - * easier to do right all in assembler). The interrupt return routine - * needs a trap frame for rare AST's (it could easily convert the frame). - * The direct costs of setting up a trap frame are two pushl's (error - * code and trap number), an addl to get rid of these, and pushing and - * popping the call-saved regs %esi, %edi and %ebp twice, The indirect - * costs are making the driver interface nonuniform so unpending of - * interrupts is more complicated and slower (call_driver(unit) would - * be easier than ensuring an interrupt frame for all handlers. Finally, - * there are some struct copies in the npx handler and maybe in the clock - * handler that could be avoided by working more with pointers to frames - * instead of frames. - * - * XXX - should we do a cld on every system entry to avoid the requirement - * for scattered cld's? - * - * Coding notes for *.s: - * - * If possible, avoid operations that involve an operand size override. - * Word-sized operations might be smaller, but the operand size override - * makes them slower on on 486's and no faster on 386's unless perhaps - * the instruction pipeline is depleted. E.g., - * - * Use movl to seg regs instead of the equivalent but more descriptive - * movw - gas generates an irelevant (slower) operand size override. - * - * Use movl to ordinary regs in preference to movw and especially - * in preference to movz[bw]l. Use unsigned (long) variables with the - * top bits clear instead of unsigned short variables to provide more - * opportunities for movl. - * - * If possible, use byte-sized operations. They are smaller and no slower. - * - * Use (%reg) instead of 0(%reg) - gas generates larger code for the latter. - * - * If the interrupt frame is made more flexible, INTR can push %eax first - * and decide the ipending case with less overhead, e.g., by avoiding - * loading segregs. - */ - -#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 ; \ - movl $KDSEL,%eax ; \ - movl %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 1f ; /* yes, handle them */ \ - MEXITCOUNT ; \ - MAYBE_POPL_ES ; \ - popl %ds ; \ - popl %edx ; \ - popl %ecx ; \ - popl %eax ; \ - iret ; \ -; \ - ALIGN_TEXT ; \ -1: ; \ - movl _cpl,%eax ; \ - movl $HWI_MASK|SWI_MASK,_cpl ; /* limit nesting ... */ \ - 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 ; \ - movl $KDSEL,%eax ; \ - movl %ax,%es ; \ - movl (2+8+0)*4(%esp),%ecx ; /* ... %ecx from thin frame ... */ \ - movl %ecx,(2+6)*4(%esp) ; /* ... to fat frame ... */ \ - movl (2+8+1)*4(%esp),%eax ; /* ... cpl from thin frame */ \ - pushl %eax ; \ - subl $4,%esp ; /* junk for unit number */ \ - incb _intr_nesting_level ; \ - MEXITCOUNT ; \ - jmp _doreti - -#define INTR(irq_num, vec_name, icu, enable_icus, reg) \ - .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 ; \ - movl $KDSEL,%eax ; /* ... and reload with kernel's own ... */ \ - movl %ax,%ds ; /* ... early for obsolete reasons */ \ - movl %ax,%es ; \ - movb _imen + IRQ_BYTE(irq_num),%al ; \ - orb $IRQ_BIT(irq_num),%al ; \ - movb %al,_imen + IRQ_BYTE(irq_num) ; \ - outb %al,$icu+2 ; \ - enable_icus ; \ - incl _cnt+V_INTR ; /* tally interrupts */ \ - movl _cpl,%eax ; \ - testb $IRQ_BIT(irq_num),%reg ; \ - jne 2f ; \ - incb _intr_nesting_level ; \ -__CONCAT(Xresume,irq_num): ; \ - FAKE_MCOUNT(12*4(%esp)) ; /* XXX late to avoid double count */ \ - 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+2 ; \ - 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 %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) - INTR(0,intr0, IO_ICU1, ENABLE_ICU1, al) - 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 -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_tty, swi_net, 0, 0, 0, 0, 0, 0 - .long 0, 0, 0, 0, 0, 0, _softclock, swi_ast -imasks: /* masks for interrupt handlers */ - .space NHWI*4 /* padding; HWI masks are elsewhere */ - .long SWI_TTY_MASK, SWI_NET_MASK, 0, 0, 0, 0, 0, 0 - .long 0, 0, 0, 0, 0, 0, SWI_CLOCK_MASK, SWI_AST_MASK - .globl _intr_nesting_level -_intr_nesting_level: - .byte 0 - .space 3 - -/* - * Interrupt counters and names. The format of these and the label names - * must agree with what vmstat expects. The tables are indexed by device - * ids so that we don't have to move the names around as devices are - * attached. - */ -#include "vector.h" - .globl _intrcnt, _eintrcnt -_intrcnt: - .space (NR_DEVICES + ICU_LEN) * 4 -_eintrcnt: - - .globl _intrnames, _eintrnames -_intrnames: - .ascii DEVICE_NAMES - .asciz "stray irq0" - .asciz "stray irq1" - .asciz "stray irq2" - .asciz "stray irq3" - .asciz "stray irq4" - .asciz "stray irq5" - .asciz "stray irq6" - .asciz "stray irq7" - .asciz "stray irq8" - .asciz "stray irq9" - .asciz "stray irq10" - .asciz "stray irq11" - .asciz "stray irq12" - .asciz "stray irq13" - .asciz "stray irq14" - .asciz "stray irq15" -_eintrnames: - - .text |