1063 lines
25 KiB
ArmAsm
1063 lines
25 KiB
ArmAsm
/*
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* from: vector.s, 386BSD 0.1 unknown origin
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* $Id: apic_vector.s,v 1.43 1999/07/20 06:52:35 msmith Exp $
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*/
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#include <machine/apic.h>
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#include <machine/smp.h>
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#include "i386/isa/intr_machdep.h"
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#ifdef FAST_SIMPLELOCK
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#define GET_FAST_INTR_LOCK \
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pushl $_fast_intr_lock ; /* address of lock */ \
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call _s_lock ; /* MP-safe */ \
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addl $4,%esp
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#define REL_FAST_INTR_LOCK \
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movl $0, _fast_intr_lock
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#else /* FAST_SIMPLELOCK */
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#define GET_FAST_INTR_LOCK \
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call _get_isrlock
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#define REL_FAST_INTR_LOCK \
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pushl $_mp_lock ; /* GIANT_LOCK */ \
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call _MPrellock ; \
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add $4, %esp
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#endif /* FAST_SIMPLELOCK */
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/* convert an absolute IRQ# into a bitmask */
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#define IRQ_BIT(irq_num) (1 << (irq_num))
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/* make an index into the IO APIC from the IRQ# */
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#define REDTBL_IDX(irq_num) (0x10 + ((irq_num) * 2))
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/*
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* Macros for interrupt interrupt entry, call to handler, and exit.
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*/
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#ifdef FAST_WITHOUTCPL
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/*
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*/
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#define FAST_INTR(irq_num, vec_name) \
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.text ; \
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SUPERALIGN_TEXT ; \
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IDTVEC(vec_name) ; \
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pushl %eax ; /* save only call-used registers */ \
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pushl %ecx ; \
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pushl %edx ; \
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pushl %ds ; \
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MAYBE_PUSHL_ES ; \
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pushl %fs ; \
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movl $KDSEL,%eax ; \
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movl %ax,%ds ; \
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MAYBE_MOVW_AX_ES ; \
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movl $KPSEL,%eax ; \
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movl %ax,%fs ; \
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FAKE_MCOUNT((5+ACTUALLY_PUSHED)*4(%esp)) ; \
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pushl _intr_unit + (irq_num) * 4 ; \
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GET_FAST_INTR_LOCK ; \
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call *_intr_handler + (irq_num) * 4 ; /* do the work ASAP */ \
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REL_FAST_INTR_LOCK ; \
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addl $4, %esp ; \
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movl $0, lapic_eoi ; \
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lock ; \
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incl _cnt+V_INTR ; /* book-keeping can wait */ \
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movl _intr_countp + (irq_num) * 4, %eax ; \
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lock ; \
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incl (%eax) ; \
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MEXITCOUNT ; \
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popl %fs ; \
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MAYBE_POPL_ES ; \
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popl %ds ; \
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popl %edx ; \
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popl %ecx ; \
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popl %eax ; \
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iret
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#else /* FAST_WITHOUTCPL */
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#define FAST_INTR(irq_num, vec_name) \
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.text ; \
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SUPERALIGN_TEXT ; \
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IDTVEC(vec_name) ; \
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pushl %eax ; /* save only call-used registers */ \
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pushl %ecx ; \
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pushl %edx ; \
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pushl %ds ; \
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MAYBE_PUSHL_ES ; \
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pushl %fs ; \
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movl $KDSEL, %eax ; \
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movl %ax, %ds ; \
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MAYBE_MOVW_AX_ES ; \
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movl $KPSEL, %eax ; \
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movl %ax, %fs ; \
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FAKE_MCOUNT((5+ACTUALLY_PUSHED)*4(%esp)) ; \
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GET_FAST_INTR_LOCK ; \
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pushl _intr_unit + (irq_num) * 4 ; \
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call *_intr_handler + (irq_num) * 4 ; /* do the work ASAP */ \
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addl $4, %esp ; \
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movl $0, lapic_eoi ; \
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lock ; \
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incl _cnt+V_INTR ; /* book-keeping can wait */ \
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movl _intr_countp + (irq_num) * 4,%eax ; \
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lock ; \
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incl (%eax) ; \
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movl _cpl, %eax ; /* unmasking pending HWIs or SWIs? */ \
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notl %eax ; \
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andl _ipending, %eax ; \
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jne 2f ; /* yes, maybe handle them */ \
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1: ; \
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MEXITCOUNT ; \
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REL_FAST_INTR_LOCK ; \
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popl %fs ; \
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MAYBE_POPL_ES ; \
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popl %ds ; \
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popl %edx ; \
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popl %ecx ; \
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popl %eax ; \
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iret ; \
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; \
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ALIGN_TEXT ; \
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2: ; \
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cmpb $3, _intr_nesting_level ; /* enough stack? */ \
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jae 1b ; /* no, return */ \
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movl _cpl, %eax ; \
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/* XXX next line is probably unnecessary now. */ \
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movl $HWI_MASK|SWI_MASK, _cpl ; /* limit nesting ... */ \
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lock ; \
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incb _intr_nesting_level ; /* ... really limit it ... */ \
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sti ; /* to do this as early as possible */ \
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popl %fs ; /* discard most of thin frame ... */ \
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MAYBE_POPL_ES ; /* discard most of thin frame ... */ \
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popl %ecx ; /* ... original %ds ... */ \
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popl %edx ; \
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xchgl %eax, 4(%esp) ; /* orig %eax; save cpl */ \
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pushal ; /* build fat frame (grrr) ... */ \
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pushl %ecx ; /* ... actually %ds ... */ \
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pushl %es ; \
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pushl %fs ;
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movl $KDSEL, %eax ; \
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movl %ax, %es ; \
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movl $KPSEL, %eax ;
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movl %ax, %fs ;
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movl (3+8+0)*4(%esp), %ecx ; /* %ecx from thin frame ... */ \
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movl %ecx, (3+6)*4(%esp) ; /* ... to fat frame ... */ \
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movl (3+8+1)*4(%esp), %eax ; /* ... cpl from thin frame */ \
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pushl %eax ; \
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subl $4, %esp ; /* junk for unit number */ \
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MEXITCOUNT ; \
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jmp _doreti
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#endif /** FAST_WITHOUTCPL */
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/*
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*
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*/
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#define PUSH_FRAME \
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pushl $0 ; /* dummy error code */ \
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pushl $0 ; /* dummy trap type */ \
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pushal ; \
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pushl %ds ; /* save data and extra segments ... */ \
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pushl %es ; \
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pushl %fs
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#define POP_FRAME \
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popl %fs ; \
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popl %es ; \
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popl %ds ; \
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popal ; \
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addl $4+4,%esp
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#define IOAPICADDR(irq_num) CNAME(int_to_apicintpin) + 16 * (irq_num) + 8
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#define REDIRIDX(irq_num) CNAME(int_to_apicintpin) + 16 * (irq_num) + 12
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#define MASK_IRQ(irq_num) \
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IMASK_LOCK ; /* into critical reg */ \
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testl $IRQ_BIT(irq_num), _apic_imen ; \
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jne 7f ; /* masked, don't mask */ \
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orl $IRQ_BIT(irq_num), _apic_imen ; /* set the mask bit */ \
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movl IOAPICADDR(irq_num), %ecx ; /* ioapic addr */ \
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movl REDIRIDX(irq_num), %eax ; /* get the index */ \
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movl %eax, (%ecx) ; /* write the index */ \
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movl IOAPIC_WINDOW(%ecx), %eax ; /* current value */ \
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orl $IOART_INTMASK, %eax ; /* set the mask */ \
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movl %eax, IOAPIC_WINDOW(%ecx) ; /* new value */ \
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7: ; /* already masked */ \
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IMASK_UNLOCK
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/*
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* Test to see whether we are handling an edge or level triggered INT.
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* Level-triggered INTs must still be masked as we don't clear the source,
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* and the EOI cycle would cause redundant INTs to occur.
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*/
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#define MASK_LEVEL_IRQ(irq_num) \
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testl $IRQ_BIT(irq_num), _apic_pin_trigger ; \
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jz 9f ; /* edge, don't mask */ \
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MASK_IRQ(irq_num) ; \
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9:
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#ifdef APIC_INTR_REORDER
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#define EOI_IRQ(irq_num) \
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movl _apic_isrbit_location + 8 * (irq_num), %eax ; \
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movl (%eax), %eax ; \
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testl _apic_isrbit_location + 4 + 8 * (irq_num), %eax ; \
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jz 9f ; /* not active */ \
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movl $0, lapic_eoi ; \
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APIC_ITRACE(apic_itrace_eoi, irq_num, APIC_ITRACE_EOI) ; \
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9:
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#else
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#define EOI_IRQ(irq_num) \
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testl $IRQ_BIT(irq_num), lapic_isr1; \
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jz 9f ; /* not active */ \
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movl $0, lapic_eoi; \
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APIC_ITRACE(apic_itrace_eoi, irq_num, APIC_ITRACE_EOI) ; \
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9:
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#endif
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/*
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* Test to see if the source is currntly masked, clear if so.
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*/
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#define UNMASK_IRQ(irq_num) \
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IMASK_LOCK ; /* into critical reg */ \
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testl $IRQ_BIT(irq_num), _apic_imen ; \
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je 7f ; /* bit clear, not masked */ \
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andl $~IRQ_BIT(irq_num), _apic_imen ;/* clear mask bit */ \
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movl IOAPICADDR(irq_num),%ecx ; /* ioapic addr */ \
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movl REDIRIDX(irq_num), %eax ; /* get the index */ \
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movl %eax,(%ecx) ; /* write the index */ \
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movl IOAPIC_WINDOW(%ecx),%eax ; /* current value */ \
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andl $~IOART_INTMASK,%eax ; /* clear the mask */ \
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movl %eax,IOAPIC_WINDOW(%ecx) ; /* new value */ \
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7: ; \
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IMASK_UNLOCK
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#ifdef INTR_SIMPLELOCK
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#define ENLOCK
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#define DELOCK
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#define LATELOCK call _get_isrlock
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#else
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#define ENLOCK \
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ISR_TRYLOCK ; /* XXX this is going away... */ \
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testl %eax, %eax ; /* did we get it? */ \
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jz 3f
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#define DELOCK ISR_RELLOCK
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#define LATELOCK
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#endif
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#ifdef APIC_INTR_DIAGNOSTIC
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#ifdef APIC_INTR_DIAGNOSTIC_IRQ
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log_intr_event:
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pushf
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cli
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pushl $CNAME(apic_itrace_debuglock)
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call CNAME(s_lock_np)
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addl $4, %esp
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movl CNAME(apic_itrace_debugbuffer_idx), %ecx
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andl $32767, %ecx
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movl _cpuid, %eax
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shll $8, %eax
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orl 8(%esp), %eax
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movw %ax, CNAME(apic_itrace_debugbuffer)(,%ecx,2)
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incl %ecx
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andl $32767, %ecx
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movl %ecx, CNAME(apic_itrace_debugbuffer_idx)
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pushl $CNAME(apic_itrace_debuglock)
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call CNAME(s_unlock_np)
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addl $4, %esp
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popf
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ret
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#define APIC_ITRACE(name, irq_num, id) \
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lock ; /* MP-safe */ \
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incl CNAME(name) + (irq_num) * 4 ; \
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pushl %eax ; \
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pushl %ecx ; \
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pushl %edx ; \
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movl $(irq_num), %eax ; \
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cmpl $APIC_INTR_DIAGNOSTIC_IRQ, %eax ; \
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jne 7f ; \
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pushl $id ; \
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call log_intr_event ; \
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addl $4, %esp ; \
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7: ; \
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popl %edx ; \
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popl %ecx ; \
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popl %eax
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#else
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#define APIC_ITRACE(name, irq_num, id) \
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lock ; /* MP-safe */ \
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incl CNAME(name) + (irq_num) * 4
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#endif
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#define APIC_ITRACE_ENTER 1
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#define APIC_ITRACE_EOI 2
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#define APIC_ITRACE_TRYISRLOCK 3
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#define APIC_ITRACE_GOTISRLOCK 4
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#define APIC_ITRACE_ENTER2 5
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#define APIC_ITRACE_LEAVE 6
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#define APIC_ITRACE_UNMASK 7
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#define APIC_ITRACE_ACTIVE 8
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#define APIC_ITRACE_MASKED 9
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#define APIC_ITRACE_NOISRLOCK 10
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#define APIC_ITRACE_MASKED2 11
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#define APIC_ITRACE_SPLZ 12
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#define APIC_ITRACE_DORETI 13
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#else
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#define APIC_ITRACE(name, irq_num, id)
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#endif
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#ifdef CPL_AND_CML
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#define INTR(irq_num, vec_name, maybe_extra_ipending) \
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.text ; \
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SUPERALIGN_TEXT ; \
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/* _XintrNN: entry point used by IDT/HWIs & splz_unpend via _vec[]. */ \
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IDTVEC(vec_name) ; \
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PUSH_FRAME ; \
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movl $KDSEL, %eax ; /* reload with kernel's data segment */ \
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movl %ax, %ds ; \
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movl %ax, %es ; \
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movl $KPSEL, %eax ; \
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movl %ax, %fs ; \
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; \
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maybe_extra_ipending ; \
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; \
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APIC_ITRACE(apic_itrace_enter, irq_num, APIC_ITRACE_ENTER) ; \
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lock ; /* MP-safe */ \
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btsl $(irq_num), iactive ; /* lazy masking */ \
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jc 1f ; /* already active */ \
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; \
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MASK_LEVEL_IRQ(irq_num) ; \
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EOI_IRQ(irq_num) ; \
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0: ; \
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APIC_ITRACE(apic_itrace_tryisrlock, irq_num, APIC_ITRACE_TRYISRLOCK) ;\
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ENLOCK ; \
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; \
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APIC_ITRACE(apic_itrace_gotisrlock, irq_num, APIC_ITRACE_GOTISRLOCK) ;\
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AVCPL_LOCK ; /* MP-safe */ \
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testl $IRQ_BIT(irq_num), _cpl ; \
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jne 2f ; /* this INT masked */ \
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testl $IRQ_BIT(irq_num), _cml ; \
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jne 2f ; /* this INT masked */ \
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orl $IRQ_BIT(irq_num), _cil ; \
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AVCPL_UNLOCK ; \
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; \
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incb _intr_nesting_level ; \
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; \
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/* entry point used by doreti_unpend for HWIs. */ \
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__CONCAT(Xresume,irq_num): ; \
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FAKE_MCOUNT(13*4(%esp)) ; /* XXX avoid dbl cnt */ \
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lock ; incl _cnt+V_INTR ; /* tally interrupts */ \
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movl _intr_countp + (irq_num) * 4, %eax ; \
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lock ; incl (%eax) ; \
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; \
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AVCPL_LOCK ; /* MP-safe */ \
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movl _cml, %eax ; \
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pushl %eax ; \
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orl _intr_mask + (irq_num) * 4, %eax ; \
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movl %eax, _cml ; \
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AVCPL_UNLOCK ; \
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; \
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pushl _intr_unit + (irq_num) * 4 ; \
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incl _inside_intr ; \
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APIC_ITRACE(apic_itrace_enter2, irq_num, APIC_ITRACE_ENTER2) ; \
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sti ; \
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call *_intr_handler + (irq_num) * 4 ; \
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cli ; \
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APIC_ITRACE(apic_itrace_leave, irq_num, APIC_ITRACE_LEAVE) ; \
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decl _inside_intr ; \
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; \
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lock ; andl $~IRQ_BIT(irq_num), iactive ; \
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lock ; andl $~IRQ_BIT(irq_num), _cil ; \
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UNMASK_IRQ(irq_num) ; \
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APIC_ITRACE(apic_itrace_unmask, irq_num, APIC_ITRACE_UNMASK) ; \
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sti ; /* doreti repeats cli/sti */ \
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MEXITCOUNT ; \
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LATELOCK ; \
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jmp _doreti ; \
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; \
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ALIGN_TEXT ; \
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1: ; /* active */ \
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APIC_ITRACE(apic_itrace_active, irq_num, APIC_ITRACE_ACTIVE) ; \
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MASK_IRQ(irq_num) ; \
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EOI_IRQ(irq_num) ; \
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AVCPL_LOCK ; /* MP-safe */ \
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lock ; \
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orl $IRQ_BIT(irq_num), _ipending ; \
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AVCPL_UNLOCK ; \
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lock ; \
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btsl $(irq_num), iactive ; /* still active */ \
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jnc 0b ; /* retry */ \
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POP_FRAME ; \
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iret ; \
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; \
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ALIGN_TEXT ; \
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2: ; /* masked by cpl|cml */ \
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APIC_ITRACE(apic_itrace_masked, irq_num, APIC_ITRACE_MASKED) ; \
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lock ; \
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orl $IRQ_BIT(irq_num), _ipending ; \
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AVCPL_UNLOCK ; \
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DELOCK ; /* XXX this is going away... */ \
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POP_FRAME ; \
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iret ; \
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ALIGN_TEXT ; \
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3: ; /* other cpu has isr lock */ \
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APIC_ITRACE(apic_itrace_noisrlock, irq_num, APIC_ITRACE_NOISRLOCK) ;\
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AVCPL_LOCK ; /* MP-safe */ \
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lock ; \
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orl $IRQ_BIT(irq_num), _ipending ; \
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testl $IRQ_BIT(irq_num), _cpl ; \
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jne 4f ; /* this INT masked */ \
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testl $IRQ_BIT(irq_num), _cml ; \
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jne 4f ; /* this INT masked */ \
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orl $IRQ_BIT(irq_num), _cil ; \
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AVCPL_UNLOCK ; \
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call forward_irq ; /* forward irq to lock holder */ \
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POP_FRAME ; /* and return */ \
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iret ; \
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ALIGN_TEXT ; \
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4: ; /* blocked */ \
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APIC_ITRACE(apic_itrace_masked2, irq_num, APIC_ITRACE_MASKED2) ;\
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AVCPL_UNLOCK ; \
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POP_FRAME ; /* and return */ \
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iret
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#else /* CPL_AND_CML */
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#define INTR(irq_num, vec_name, maybe_extra_ipending) \
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.text ; \
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SUPERALIGN_TEXT ; \
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/* _XintrNN: entry point used by IDT/HWIs & splz_unpend via _vec[]. */ \
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IDTVEC(vec_name) ; \
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PUSH_FRAME ; \
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movl $KDSEL, %eax ; /* reload with kernel's data segment */ \
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movl %ax, %ds ; \
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movl %ax, %es ; \
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movl $KPSEL, %eax ; \
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movl %ax, %fs ; \
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; \
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maybe_extra_ipending ; \
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; \
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APIC_ITRACE(apic_itrace_enter, irq_num, APIC_ITRACE_ENTER) ; \
|
|
lock ; /* MP-safe */ \
|
|
btsl $(irq_num), iactive ; /* lazy masking */ \
|
|
jc 1f ; /* already active */ \
|
|
; \
|
|
MASK_LEVEL_IRQ(irq_num) ; \
|
|
EOI_IRQ(irq_num) ; \
|
|
0: ; \
|
|
APIC_ITRACE(apic_itrace_tryisrlock, irq_num, APIC_ITRACE_TRYISRLOCK) ;\
|
|
ISR_TRYLOCK ; /* XXX this is going away... */ \
|
|
testl %eax, %eax ; /* did we get it? */ \
|
|
jz 3f ; /* no */ \
|
|
; \
|
|
APIC_ITRACE(apic_itrace_gotisrlock, irq_num, APIC_ITRACE_GOTISRLOCK) ;\
|
|
AVCPL_LOCK ; /* MP-safe */ \
|
|
testl $IRQ_BIT(irq_num), _cpl ; \
|
|
jne 2f ; /* this INT masked */ \
|
|
AVCPL_UNLOCK ; \
|
|
; \
|
|
incb _intr_nesting_level ; \
|
|
; \
|
|
/* entry point used by doreti_unpend for HWIs. */ \
|
|
__CONCAT(Xresume,irq_num): ; \
|
|
FAKE_MCOUNT(13*4(%esp)) ; /* XXX avoid dbl cnt */ \
|
|
lock ; incl _cnt+V_INTR ; /* tally interrupts */ \
|
|
movl _intr_countp + (irq_num) * 4, %eax ; \
|
|
lock ; incl (%eax) ; \
|
|
; \
|
|
AVCPL_LOCK ; /* MP-safe */ \
|
|
movl _cpl, %eax ; \
|
|
pushl %eax ; \
|
|
orl _intr_mask + (irq_num) * 4, %eax ; \
|
|
movl %eax, _cpl ; \
|
|
lock ; \
|
|
andl $~IRQ_BIT(irq_num), _ipending ; \
|
|
AVCPL_UNLOCK ; \
|
|
; \
|
|
pushl _intr_unit + (irq_num) * 4 ; \
|
|
APIC_ITRACE(apic_itrace_enter2, irq_num, APIC_ITRACE_ENTER2) ; \
|
|
sti ; \
|
|
call *_intr_handler + (irq_num) * 4 ; \
|
|
cli ; \
|
|
APIC_ITRACE(apic_itrace_leave, irq_num, APIC_ITRACE_LEAVE) ; \
|
|
; \
|
|
lock ; andl $~IRQ_BIT(irq_num), iactive ; \
|
|
UNMASK_IRQ(irq_num) ; \
|
|
APIC_ITRACE(apic_itrace_unmask, irq_num, APIC_ITRACE_UNMASK) ; \
|
|
sti ; /* doreti repeats cli/sti */ \
|
|
MEXITCOUNT ; \
|
|
jmp _doreti ; \
|
|
; \
|
|
ALIGN_TEXT ; \
|
|
1: ; /* active */ \
|
|
APIC_ITRACE(apic_itrace_active, irq_num, APIC_ITRACE_ACTIVE) ; \
|
|
MASK_IRQ(irq_num) ; \
|
|
EOI_IRQ(irq_num) ; \
|
|
AVCPL_LOCK ; /* MP-safe */ \
|
|
lock ; \
|
|
orl $IRQ_BIT(irq_num), _ipending ; \
|
|
AVCPL_UNLOCK ; \
|
|
lock ; \
|
|
btsl $(irq_num), iactive ; /* still active */ \
|
|
jnc 0b ; /* retry */ \
|
|
POP_FRAME ; \
|
|
iret ; /* XXX: iactive bit might be 0 now */ \
|
|
ALIGN_TEXT ; \
|
|
2: ; /* masked by cpl, leave iactive set */ \
|
|
APIC_ITRACE(apic_itrace_masked, irq_num, APIC_ITRACE_MASKED) ; \
|
|
lock ; \
|
|
orl $IRQ_BIT(irq_num), _ipending ; \
|
|
AVCPL_UNLOCK ; \
|
|
ISR_RELLOCK ; /* XXX this is going away... */ \
|
|
POP_FRAME ; \
|
|
iret ; \
|
|
ALIGN_TEXT ; \
|
|
3: ; /* other cpu has isr lock */ \
|
|
APIC_ITRACE(apic_itrace_noisrlock, irq_num, APIC_ITRACE_NOISRLOCK) ;\
|
|
AVCPL_LOCK ; /* MP-safe */ \
|
|
lock ; \
|
|
orl $IRQ_BIT(irq_num), _ipending ; \
|
|
testl $IRQ_BIT(irq_num), _cpl ; \
|
|
jne 4f ; /* this INT masked */ \
|
|
AVCPL_UNLOCK ; \
|
|
call forward_irq ; /* forward irq to lock holder */ \
|
|
POP_FRAME ; /* and return */ \
|
|
iret ; \
|
|
ALIGN_TEXT ; \
|
|
4: ; /* blocked */ \
|
|
APIC_ITRACE(apic_itrace_masked2, irq_num, APIC_ITRACE_MASKED2) ;\
|
|
AVCPL_UNLOCK ; \
|
|
POP_FRAME ; /* and return */ \
|
|
iret
|
|
|
|
#endif /* CPL_AND_CML */
|
|
|
|
|
|
/*
|
|
* Handle "spurious INTerrupts".
|
|
* Notes:
|
|
* This is different than the "spurious INTerrupt" generated by an
|
|
* 8259 PIC for missing INTs. See the APIC documentation for details.
|
|
* This routine should NOT do an 'EOI' cycle.
|
|
*/
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
.globl _Xspuriousint
|
|
_Xspuriousint:
|
|
|
|
/* No EOI cycle used here */
|
|
|
|
iret
|
|
|
|
|
|
/*
|
|
* Handle TLB shootdowns.
|
|
*/
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
.globl _Xinvltlb
|
|
_Xinvltlb:
|
|
pushl %eax
|
|
|
|
#ifdef COUNT_XINVLTLB_HITS
|
|
pushl %fs
|
|
movl $KPSEL, %eax
|
|
movl %ax, %fs
|
|
movl _cpuid, %eax
|
|
popl %fs
|
|
ss
|
|
incl _xhits(,%eax,4)
|
|
#endif /* COUNT_XINVLTLB_HITS */
|
|
|
|
movl %cr3, %eax /* invalidate the TLB */
|
|
movl %eax, %cr3
|
|
|
|
ss /* stack segment, avoid %ds load */
|
|
movl $0, lapic_eoi /* End Of Interrupt to APIC */
|
|
|
|
popl %eax
|
|
iret
|
|
|
|
|
|
#ifdef BETTER_CLOCK
|
|
|
|
/*
|
|
* Executed by a CPU when it receives an Xcpucheckstate IPI from another CPU,
|
|
*
|
|
* - Stores current cpu state in checkstate_cpustate[cpuid]
|
|
* 0 == user, 1 == sys, 2 == intr
|
|
* - Stores current process in checkstate_curproc[cpuid]
|
|
*
|
|
* - Signals its receipt by setting bit cpuid in checkstate_probed_cpus.
|
|
*
|
|
* stack: 0->ds, 4->fs, 8->ebx, 12->eax, 16->eip, 20->cs, 24->eflags
|
|
*/
|
|
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
.globl _Xcpucheckstate
|
|
.globl _checkstate_cpustate
|
|
.globl _checkstate_curproc
|
|
.globl _checkstate_pc
|
|
_Xcpucheckstate:
|
|
pushl %eax
|
|
pushl %ebx
|
|
pushl %ds /* save current data segment */
|
|
pushl %fs
|
|
|
|
movl $KDSEL, %eax
|
|
movl %ax, %ds /* use KERNEL data segment */
|
|
movl $KPSEL, %eax
|
|
movl %ax, %fs
|
|
|
|
movl $0, lapic_eoi /* End Of Interrupt to APIC */
|
|
|
|
movl $0, %ebx
|
|
movl 20(%esp), %eax
|
|
andl $3, %eax
|
|
cmpl $3, %eax
|
|
je 1f
|
|
testl $PSL_VM, 24(%esp)
|
|
jne 1f
|
|
incl %ebx /* system or interrupt */
|
|
#ifdef CPL_AND_CML
|
|
cmpl $0, _inside_intr
|
|
je 1f
|
|
incl %ebx /* interrupt */
|
|
#endif
|
|
1:
|
|
movl _cpuid, %eax
|
|
movl %ebx, _checkstate_cpustate(,%eax,4)
|
|
movl _curproc, %ebx
|
|
movl %ebx, _checkstate_curproc(,%eax,4)
|
|
movl 16(%esp), %ebx
|
|
movl %ebx, _checkstate_pc(,%eax,4)
|
|
|
|
lock /* checkstate_probed_cpus |= (1<<id) */
|
|
btsl %eax, _checkstate_probed_cpus
|
|
|
|
popl %fs
|
|
popl %ds /* restore previous data segment */
|
|
popl %ebx
|
|
popl %eax
|
|
iret
|
|
|
|
#endif /* BETTER_CLOCK */
|
|
|
|
/*
|
|
* Executed by a CPU when it receives an Xcpuast IPI from another CPU,
|
|
*
|
|
* - Signals its receipt by clearing bit cpuid in checkstate_need_ast.
|
|
*
|
|
* - We need a better method of triggering asts on other cpus.
|
|
*/
|
|
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
.globl _Xcpuast
|
|
_Xcpuast:
|
|
PUSH_FRAME
|
|
movl $KDSEL, %eax
|
|
movl %ax, %ds /* use KERNEL data segment */
|
|
movl %ax, %es
|
|
movl $KPSEL, %eax
|
|
movl %ax, %fs
|
|
|
|
movl _cpuid, %eax
|
|
lock /* checkstate_need_ast &= ~(1<<id) */
|
|
btrl %eax, _checkstate_need_ast
|
|
movl $0, lapic_eoi /* End Of Interrupt to APIC */
|
|
|
|
lock
|
|
btsl %eax, _checkstate_pending_ast
|
|
jc 1f
|
|
|
|
FAKE_MCOUNT(13*4(%esp))
|
|
|
|
/*
|
|
* Giant locks do not come cheap.
|
|
* A lot of cycles are going to be wasted here.
|
|
*/
|
|
call _get_isrlock
|
|
|
|
AVCPL_LOCK
|
|
#ifdef CPL_AND_CML
|
|
movl _cml, %eax
|
|
#else
|
|
movl _cpl, %eax
|
|
#endif
|
|
pushl %eax
|
|
movl $1, _astpending /* XXX */
|
|
AVCPL_UNLOCK
|
|
lock
|
|
incb _intr_nesting_level
|
|
sti
|
|
|
|
pushl $0
|
|
|
|
movl _cpuid, %eax
|
|
lock
|
|
btrl %eax, _checkstate_pending_ast
|
|
lock
|
|
btrl %eax, CNAME(resched_cpus)
|
|
jnc 2f
|
|
movl $1, CNAME(want_resched)
|
|
lock
|
|
incl CNAME(want_resched_cnt)
|
|
2:
|
|
lock
|
|
incl CNAME(cpuast_cnt)
|
|
MEXITCOUNT
|
|
jmp _doreti
|
|
1:
|
|
/* We are already in the process of delivering an ast for this CPU */
|
|
POP_FRAME
|
|
iret
|
|
|
|
|
|
/*
|
|
* Executed by a CPU when it receives an XFORWARD_IRQ IPI.
|
|
*/
|
|
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
.globl _Xforward_irq
|
|
_Xforward_irq:
|
|
PUSH_FRAME
|
|
movl $KDSEL, %eax
|
|
movl %ax, %ds /* use KERNEL data segment */
|
|
movl %ax, %es
|
|
movl $KPSEL, %eax
|
|
movl %ax, %fs
|
|
|
|
movl $0, lapic_eoi /* End Of Interrupt to APIC */
|
|
|
|
FAKE_MCOUNT(13*4(%esp))
|
|
|
|
ISR_TRYLOCK
|
|
testl %eax,%eax /* Did we get the lock ? */
|
|
jz 1f /* No */
|
|
|
|
lock
|
|
incl CNAME(forward_irq_hitcnt)
|
|
cmpb $4, _intr_nesting_level
|
|
jae 2f
|
|
|
|
AVCPL_LOCK
|
|
#ifdef CPL_AND_CML
|
|
movl _cml, %eax
|
|
#else
|
|
movl _cpl, %eax
|
|
#endif
|
|
pushl %eax
|
|
AVCPL_UNLOCK
|
|
lock
|
|
incb _intr_nesting_level
|
|
sti
|
|
|
|
pushl $0
|
|
|
|
MEXITCOUNT
|
|
jmp _doreti /* Handle forwarded interrupt */
|
|
1:
|
|
lock
|
|
incl CNAME(forward_irq_misscnt)
|
|
call forward_irq /* Oops, we've lost the isr lock */
|
|
MEXITCOUNT
|
|
POP_FRAME
|
|
iret
|
|
2:
|
|
lock
|
|
incl CNAME(forward_irq_toodeepcnt)
|
|
3:
|
|
ISR_RELLOCK
|
|
MEXITCOUNT
|
|
POP_FRAME
|
|
iret
|
|
|
|
/*
|
|
*
|
|
*/
|
|
forward_irq:
|
|
MCOUNT
|
|
cmpl $0,_invltlb_ok
|
|
jz 4f
|
|
|
|
cmpl $0, CNAME(forward_irq_enabled)
|
|
jz 4f
|
|
|
|
movl _mp_lock,%eax
|
|
cmpl $FREE_LOCK,%eax
|
|
jne 1f
|
|
movl $0, %eax /* Pick CPU #0 if noone has lock */
|
|
1:
|
|
shrl $24,%eax
|
|
movl _cpu_num_to_apic_id(,%eax,4),%ecx
|
|
shll $24,%ecx
|
|
movl lapic_icr_hi, %eax
|
|
andl $~APIC_ID_MASK, %eax
|
|
orl %ecx, %eax
|
|
movl %eax, lapic_icr_hi
|
|
|
|
2:
|
|
movl lapic_icr_lo, %eax
|
|
andl $APIC_DELSTAT_MASK,%eax
|
|
jnz 2b
|
|
movl lapic_icr_lo, %eax
|
|
andl $APIC_RESV2_MASK, %eax
|
|
orl $(APIC_DEST_DESTFLD|APIC_DELMODE_FIXED|XFORWARD_IRQ_OFFSET), %eax
|
|
movl %eax, lapic_icr_lo
|
|
3:
|
|
movl lapic_icr_lo, %eax
|
|
andl $APIC_DELSTAT_MASK,%eax
|
|
jnz 3b
|
|
4:
|
|
ret
|
|
|
|
/*
|
|
* Executed by a CPU when it receives an Xcpustop IPI from another CPU,
|
|
*
|
|
* - Signals its receipt.
|
|
* - Waits for permission to restart.
|
|
* - Signals its restart.
|
|
*/
|
|
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
.globl _Xcpustop
|
|
_Xcpustop:
|
|
pushl %ebp
|
|
movl %esp, %ebp
|
|
pushl %eax
|
|
pushl %ecx
|
|
pushl %edx
|
|
pushl %ds /* save current data segment */
|
|
pushl %fs
|
|
|
|
movl $KDSEL, %eax
|
|
movl %ax, %ds /* use KERNEL data segment */
|
|
movl $KPSEL, %eax
|
|
movl %ax, %fs
|
|
|
|
movl $0, lapic_eoi /* End Of Interrupt to APIC */
|
|
|
|
movl _cpuid, %eax
|
|
imull $PCB_SIZE, %eax
|
|
leal CNAME(stoppcbs)(%eax), %eax
|
|
pushl %eax
|
|
call CNAME(savectx) /* Save process context */
|
|
addl $4, %esp
|
|
|
|
|
|
movl _cpuid, %eax
|
|
|
|
lock
|
|
btsl %eax, _stopped_cpus /* stopped_cpus |= (1<<id) */
|
|
1:
|
|
btl %eax, _started_cpus /* while (!(started_cpus & (1<<id))) */
|
|
jnc 1b
|
|
|
|
lock
|
|
btrl %eax, _started_cpus /* started_cpus &= ~(1<<id) */
|
|
lock
|
|
btrl %eax, _stopped_cpus /* stopped_cpus &= ~(1<<id) */
|
|
|
|
test %eax, %eax
|
|
jnz 2f
|
|
|
|
movl CNAME(cpustop_restartfunc), %eax
|
|
test %eax, %eax
|
|
jz 2f
|
|
movl $0, CNAME(cpustop_restartfunc) /* One-shot */
|
|
|
|
call %eax
|
|
2:
|
|
popl %fs
|
|
popl %ds /* restore previous data segment */
|
|
popl %edx
|
|
popl %ecx
|
|
popl %eax
|
|
movl %ebp, %esp
|
|
popl %ebp
|
|
iret
|
|
|
|
|
|
MCOUNT_LABEL(bintr)
|
|
FAST_INTR(0,fastintr0)
|
|
FAST_INTR(1,fastintr1)
|
|
FAST_INTR(2,fastintr2)
|
|
FAST_INTR(3,fastintr3)
|
|
FAST_INTR(4,fastintr4)
|
|
FAST_INTR(5,fastintr5)
|
|
FAST_INTR(6,fastintr6)
|
|
FAST_INTR(7,fastintr7)
|
|
FAST_INTR(8,fastintr8)
|
|
FAST_INTR(9,fastintr9)
|
|
FAST_INTR(10,fastintr10)
|
|
FAST_INTR(11,fastintr11)
|
|
FAST_INTR(12,fastintr12)
|
|
FAST_INTR(13,fastintr13)
|
|
FAST_INTR(14,fastintr14)
|
|
FAST_INTR(15,fastintr15)
|
|
FAST_INTR(16,fastintr16)
|
|
FAST_INTR(17,fastintr17)
|
|
FAST_INTR(18,fastintr18)
|
|
FAST_INTR(19,fastintr19)
|
|
FAST_INTR(20,fastintr20)
|
|
FAST_INTR(21,fastintr21)
|
|
FAST_INTR(22,fastintr22)
|
|
FAST_INTR(23,fastintr23)
|
|
#define CLKINTR_PENDING movl $1,CNAME(clkintr_pending)
|
|
INTR(0,intr0, CLKINTR_PENDING)
|
|
INTR(1,intr1,)
|
|
INTR(2,intr2,)
|
|
INTR(3,intr3,)
|
|
INTR(4,intr4,)
|
|
INTR(5,intr5,)
|
|
INTR(6,intr6,)
|
|
INTR(7,intr7,)
|
|
INTR(8,intr8,)
|
|
INTR(9,intr9,)
|
|
INTR(10,intr10,)
|
|
INTR(11,intr11,)
|
|
INTR(12,intr12,)
|
|
INTR(13,intr13,)
|
|
INTR(14,intr14,)
|
|
INTR(15,intr15,)
|
|
INTR(16,intr16,)
|
|
INTR(17,intr17,)
|
|
INTR(18,intr18,)
|
|
INTR(19,intr19,)
|
|
INTR(20,intr20,)
|
|
INTR(21,intr21,)
|
|
INTR(22,intr22,)
|
|
INTR(23,intr23,)
|
|
MCOUNT_LABEL(eintr)
|
|
|
|
/*
|
|
* Executed by a CPU when it receives a RENDEZVOUS IPI from another CPU.
|
|
*
|
|
* - Calls the generic rendezvous action function.
|
|
*/
|
|
.text
|
|
SUPERALIGN_TEXT
|
|
.globl _Xrendezvous
|
|
_Xrendezvous:
|
|
PUSH_FRAME
|
|
movl $KDSEL, %eax
|
|
movl %ax, %ds /* use KERNEL data segment */
|
|
movl %ax, %es
|
|
movl $KPSEL, %eax
|
|
movl %ax, %fs
|
|
|
|
call smp_rendezvous_action
|
|
|
|
movl $0, lapic_eoi /* End Of Interrupt to APIC */
|
|
POP_FRAME
|
|
iret
|
|
|
|
|
|
.data
|
|
/*
|
|
* Addresses of interrupt handlers.
|
|
* XresumeNN: Resumption addresses for HWIs.
|
|
*/
|
|
.globl _ihandlers
|
|
_ihandlers:
|
|
/*
|
|
* used by:
|
|
* ipl.s: doreti_unpend
|
|
*/
|
|
.long Xresume0, Xresume1, Xresume2, Xresume3
|
|
.long Xresume4, Xresume5, Xresume6, Xresume7
|
|
.long Xresume8, Xresume9, Xresume10, Xresume11
|
|
.long Xresume12, Xresume13, Xresume14, Xresume15
|
|
.long Xresume16, Xresume17, Xresume18, Xresume19
|
|
.long Xresume20, Xresume21, Xresume22, Xresume23
|
|
/*
|
|
* used by:
|
|
* ipl.s: doreti_unpend
|
|
* apic_ipl.s: splz_unpend
|
|
*/
|
|
.long _swi_null, swi_net, _swi_null, _swi_null
|
|
.long _swi_vm, _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, SWI_CLOCK_MASK, 0
|
|
|
|
/* active flag for lazy masking */
|
|
iactive:
|
|
.long 0
|
|
|
|
#ifdef COUNT_XINVLTLB_HITS
|
|
.globl _xhits
|
|
_xhits:
|
|
.space (NCPU * 4), 0
|
|
#endif /* COUNT_XINVLTLB_HITS */
|
|
|
|
/* variables used by stop_cpus()/restart_cpus()/Xcpustop */
|
|
.globl _stopped_cpus, _started_cpus
|
|
_stopped_cpus:
|
|
.long 0
|
|
_started_cpus:
|
|
.long 0
|
|
|
|
#ifdef BETTER_CLOCK
|
|
.globl _checkstate_probed_cpus
|
|
_checkstate_probed_cpus:
|
|
.long 0
|
|
#endif /* BETTER_CLOCK */
|
|
.globl _checkstate_need_ast
|
|
_checkstate_need_ast:
|
|
.long 0
|
|
_checkstate_pending_ast:
|
|
.long 0
|
|
.globl CNAME(forward_irq_misscnt)
|
|
.globl CNAME(forward_irq_toodeepcnt)
|
|
.globl CNAME(forward_irq_hitcnt)
|
|
.globl CNAME(resched_cpus)
|
|
.globl CNAME(want_resched_cnt)
|
|
.globl CNAME(cpuast_cnt)
|
|
.globl CNAME(cpustop_restartfunc)
|
|
CNAME(forward_irq_misscnt):
|
|
.long 0
|
|
CNAME(forward_irq_hitcnt):
|
|
.long 0
|
|
CNAME(forward_irq_toodeepcnt):
|
|
.long 0
|
|
CNAME(resched_cpus):
|
|
.long 0
|
|
CNAME(want_resched_cnt):
|
|
.long 0
|
|
CNAME(cpuast_cnt):
|
|
.long 0
|
|
CNAME(cpustop_restartfunc):
|
|
.long 0
|
|
|
|
|
|
|
|
.globl _apic_pin_trigger
|
|
_apic_pin_trigger:
|
|
.long 0
|
|
|
|
.text
|