diff options
Diffstat (limited to 'i386/i386at/interrupt.S')
| -rw-r--r-- | i386/i386at/interrupt.S | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/i386/i386at/interrupt.S b/i386/i386at/interrupt.S index 77424b43..ac71473b 100644 --- a/i386/i386at/interrupt.S +++ b/i386/i386at/interrupt.S @@ -61,6 +61,11 @@ ENTRY(interrupt) je _call_local_ast #endif + movb EXT(irqinfo)(,%ecx,2),%al /* look up irq_info[irq].trigger */ + testb $1,%al /* was this a level triggered interrupt? */ + jnz _call_handler /* yes: handle before eoi */ + +_eoi: #ifndef APIC movl $1,%eax shll %cl,%eax /* get corresponding IRQ mask */ @@ -102,6 +107,12 @@ ENTRY(interrupt) call EXT(ioapic_irq_eoi) /* ioapic irq specific EOI */ #endif + movl S_IRQ,%ecx /* restore irq number */ + movb EXT(irqinfo)(,%ecx,2),%al /* look up irq_info[irq].trigger */ + testb $1,%al /* was this a level triggered interrupt? */ + jnz _completed /* yes: we are done */ + +_call_handler: movl S_IPL,%eax movl %eax,4(%esp) /* previous ipl as 2nd arg */ @@ -119,6 +130,11 @@ ENTRY(interrupt) call *EXT(ivect)(%eax) /* call interrupt handler */ + movl S_IRQ,%ecx /* restore irq number */ + movb EXT(irqinfo)(,%ecx,2),%al /* look up irq_info[irq].trigger */ + testb $1,%al /* was this a level triggered interrupt? */ + jnz _eoi /* yes: eoi */ + _completed: movl S_IPL,%eax /* restore previous ipl */ movl %eax,(%esp) |