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[PATCH] genirq: convert the i386 architecture to irq-chips

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This patch converts all the i386 PIC controllers (except VisWS and Voyager,
which I could not test - but which should still work as old-style IRQ layers)
to the new and simpler irq-chip interrupt handling layer.

[akpm@osdl.org: build fix]
[mingo@elte.hu: enable fasteoi handler for i386 level-triggered IO-APIC irqs]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar
2006-10-04 02:16:26 -07:00
committed by Linus Torvalds
parent f29bd1ba68
commit f5b9ed7acd
4 changed files with 80 additions and 146 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
arch/i386/kernel/irq.c
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@@ -55,6 +55,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
{
/* high bit used in ret_from_ code */
int irq = ~regs->orig_eax;
struct irq_desc *desc = irq_desc + irq;
#ifdef CONFIG_4KSTACKS
union irq_ctx *curctx, *irqctx;
u32 *isp;
@@ -94,7 +95,7 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
* current stack (which is the irq stack already after all)
*/
if (curctx != irqctx) {
int arg1, arg2, ebx;
int arg1, arg2, arg3, ebx;
/* build the stack frame on the IRQ stack */
isp = (u32*) ((char*)irqctx + sizeof(*irqctx));
@@ -110,16 +111,17 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
(curctx->tinfo.preempt_count & SOFTIRQ_MASK);
asm volatile(
" xchgl %%ebx,%%esp \n"
" call __do_IRQ \n"
" xchgl %%ebx,%%esp \n"
" call *%%edi \n"
" movl %%ebx,%%esp \n"
: "=a" (arg1), "=d" (arg2), "=b" (ebx)
: "0" (irq), "1" (regs), "2" (isp)
: "memory", "cc", "ecx"
: "=a" (arg1), "=d" (arg2), "=c" (arg3), "=b" (ebx)
: "0" (irq), "1" (desc), "2" (regs), "3" (isp),
"D" (desc->handle_irq)
: "memory", "cc"
);
} else
#endif
__do_IRQ(irq, regs);
desc->handle_irq(irq, desc, regs);
irq_exit();
@@ -253,7 +255,8 @@ int show_interrupts(struct seq_file *p, void *v)
for_each_online_cpu(j)
seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]);
#endif
seq_printf(p, " %14s", irq_desc[i].chip->typename);
seq_printf(p, " %8s", irq_desc[i].chip->name);
seq_printf(p, "-%s", handle_irq_name(irq_desc[i].handle_irq));
seq_printf(p, " %s", action->name);
for (action=action->next; action; action = action->next)