From 1603b5aca4f15b34848fb5594d0c7b6333b99144 Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Thu, 2 Nov 2006 02:08:36 +0900 Subject: [MIPS] IRQ cleanups This is a big irq cleanup patch. * Use set_irq_chip() to register irq_chip. * Initialize .mask, .unmask, .mask_ack field. Functions for these method are already exist in most case. * Do not initialize .startup, .shutdown, .enable, .disable fields if default routines provided by irq_chip_set_defaults() were suitable. * Remove redundant irq_desc initializations. * Remove unnecessary local_irq_save/local_irq_restore, spin_lock. With this cleanup, it would be easy to switch to slightly lightwait irq flow handlers (handle_level_irq(), etc.) instead of __do_IRQ(). Though whole this patch is quite large, changes in each irq_chip are not quite simple. Please review and test on your platform. Thanks. Signed-off-by: Atsushi Nemoto Signed-off-by: Ralf Baechle --- arch/mips/sni/irq.c | 40 ++++++---------------------------------- 1 file changed, 6 insertions(+), 34 deletions(-) (limited to 'arch/mips/sni') diff --git a/arch/mips/sni/irq.c b/arch/mips/sni/irq.c index 48fb74a7aaec..8511bcc6d99d 100644 --- a/arch/mips/sni/irq.c +++ b/arch/mips/sni/irq.c @@ -11,44 +11,25 @@ #include #include #include -#include #include #include #include -DEFINE_SPINLOCK(pciasic_lock); - static void enable_pciasic_irq(unsigned int irq) { unsigned int mask = 1 << (irq - PCIMT_IRQ_INT2); - unsigned long flags; - spin_lock_irqsave(&pciasic_lock, flags); *(volatile u8 *) PCIMT_IRQSEL |= mask; - spin_unlock_irqrestore(&pciasic_lock, flags); -} - -static unsigned int startup_pciasic_irq(unsigned int irq) -{ - enable_pciasic_irq(irq); - return 0; /* never anything pending */ } -#define shutdown_pciasic_irq disable_pciasic_irq - void disable_pciasic_irq(unsigned int irq) { unsigned int mask = ~(1 << (irq - PCIMT_IRQ_INT2)); - unsigned long flags; - spin_lock_irqsave(&pciasic_lock, flags); *(volatile u8 *) PCIMT_IRQSEL &= mask; - spin_unlock_irqrestore(&pciasic_lock, flags); } -#define mask_and_ack_pciasic_irq disable_pciasic_irq - static void end_pciasic_irq(unsigned int irq) { if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) @@ -57,11 +38,10 @@ static void end_pciasic_irq(unsigned int irq) static struct irq_chip pciasic_irq_type = { .typename = "ASIC-PCI", - .startup = startup_pciasic_irq, - .shutdown = shutdown_pciasic_irq, - .enable = enable_pciasic_irq, - .disable = disable_pciasic_irq, - .ack = mask_and_ack_pciasic_irq, + .ack = disable_pciasic_irq, + .mask = disable_pciasic_irq, + .mask_ack = disable_pciasic_irq, + .unmask = enable_pciasic_irq, .end = end_pciasic_irq, }; @@ -178,12 +158,8 @@ asmlinkage void plat_irq_dispatch(void) void __init init_pciasic(void) { - unsigned long flags; - - spin_lock_irqsave(&pciasic_lock, flags); * (volatile u8 *) PCIMT_IRQSEL = IT_EISA | IT_INTA | IT_INTB | IT_INTC | IT_INTD; - spin_unlock_irqrestore(&pciasic_lock, flags); } /* @@ -199,12 +175,8 @@ void __init arch_init_irq(void) init_pciasic(); /* Actually we've got more interrupts to handle ... */ - for (i = PCIMT_IRQ_INT2; i <= PCIMT_IRQ_ETHERNET; i++) { - irq_desc[i].status = IRQ_DISABLED; - irq_desc[i].action = 0; - irq_desc[i].depth = 1; - irq_desc[i].chip = &pciasic_irq_type; - } + for (i = PCIMT_IRQ_INT2; i <= PCIMT_IRQ_ETHERNET; i++) + set_irq_chip(i, &pciasic_irq_type); change_c0_status(ST0_IM, IE_IRQ1|IE_IRQ2|IE_IRQ3|IE_IRQ4); } -- cgit v1.2.3