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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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6
include/asm-mips/irq_cpu.h
View file

@ -13,8 +13,8 @@
#ifndef _ASM_IRQ_CPU_H
#define _ASM_IRQ_CPU_H
extern void mips_cpu_irq_init(int irq_base);
extern void rm7k_cpu_irq_init(int irq_base);
extern void rm9k_cpu_irq_init(int irq_base);
extern void mips_cpu_irq_init(void);
extern void rm7k_cpu_irq_init(void);
extern void rm9k_cpu_irq_init(void);
#endif /* _ASM_IRQ_CPU_H */