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[MIPS] Define MIPS_CPU_IRQ_BASE in generic header

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The irq_base for {mips,rm7k,rm9k}_cpu_irq_init() are constant on all
platforms and are same value on most platforms (0 or 16, depends on
CONFIG_I8259).  Define them in asm-mips/mach-generic/irq.h and make
them customizable.  This will save a few cycle on each CPU interrupt.

A good side effect is removing some dependencies to MALTA in generic
SMTC code.

Although MIPS_CPU_IRQ_BASE is customizable, this patch changes irq
mappings on DDB5477, EMMA2RH and MIPS_SIM, since really customizing
them might cause some header dependency problem and there seems no
good reason to customize it.  So currently only VR41XX is using custom
MIPS_CPU_IRQ_BASE value, which is 0 regardless of CONFIG_I8259.

Testing this patch on those platforms is greatly appreciated.  Thank
you.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto 2007-01-08 02:14:29 +09:00 • committed by Ralf Baechle
parent b6ec8f069b
commit 97dcb82de6
40 changed files with 128 additions and 98 deletions
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4
arch/mips/kernel/rtlx.c
View file

@ -63,7 +63,7 @@ extern void *vpe_get_shared(int index);
static void rtlx_dispatch(void)
{
do_IRQ(MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ);
do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ);
}
@ -491,7 +491,7 @@ static struct irqaction rtlx_irq = {
.name = "RTLX",
};
static int rtlx_irq_num = MIPSCPU_INT_BASE + MIPS_CPU_RTLX_IRQ;
static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ;
static char register_chrdev_failed[] __initdata =
KERN_ERR "rtlx_module_init: unable to register device\n";