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x86: isolate PIC/PIT in/out calls

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Rather than remove and/or mangle inb_p/outb_p we want to remove the use
of them from inappropriate places. For the PIC/PIT this may eventually
depend on 32/64bitism or similar so start by adding inb/outb_pit and
inb/outb_pic so that we can make them use any scheme we settle on without
disturbing the existing, correct (for ISA), port 0x80 usage. (eg we can
make inb_pit use udelay without messing up inb_p).

Floppy already does this for the fdc. That really only leaves the CMOS as
a core logic item to tackle, and bits of parallel port handling in the
chipset layers.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Alan Cox
2008-01-30 13:33:14 +01:00
committed by Ingo Molnar
parent fb8830e72d
commit 466eed22d1
7 changed files with 45 additions and 39 deletions
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6
arch/x86/kernel/apm_32.c
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@@ -1174,11 +1174,11 @@ static void reinit_timer(void)
spin_lock_irqsave(&i8253_lock, flags);
/* set the clock to HZ */
outb_p(0x34, PIT_MODE); /* binary, mode 2, LSB/MSB, ch 0 */
outb_pit(0x34, PIT_MODE); /* binary, mode 2, LSB/MSB, ch 0 */
udelay(10);
outb_p(LATCH & 0xff, PIT_CH0); /* LSB */
outb_pit(LATCH & 0xff, PIT_CH0); /* LSB */
udelay(10);
outb(LATCH >> 8, PIT_CH0); /* MSB */
outb_pit(LATCH >> 8, PIT_CH0); /* MSB */
udelay(10);
spin_unlock_irqrestore(&i8253_lock, flags);
#endif