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m68knommu: limit interrupts supported by ColdFire intc-2 driver 

The intc-2 interrupt controller on some ColdFire CPUs has a set range of
interrupts its supports (64 through 128 or 192 depending on model). We
shouldn't be setting this handler for every possible interrupt from 0 to
255. Set more appropriate limits, and this means we can drop the interrupt
number check in the mask and unmask routines.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
This commit is contained in:
Greg Ungerer 2011-03-07 17:21:43 +10:00
parent 7badfabb3f
commit 49bc6deace
1 changed files with 25 additions and 33 deletions
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58
arch/m68knommu/platform/coldfire/intc-2.c
View File

@ -45,54 +45,46 @@ static u8 intc_intpri = MCFSIM_ICR_LEVEL(6) | MCFSIM_ICR_PRI(6);
static void intc_irq_mask(struct irq_data *d)
{
unsigned int irq = d->irq;
unsigned int irq = d->irq - MCFINT_VECBASE;
unsigned long imraddr;
u32 val, imrbit;
if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECBASE + NR_VECS)) {
unsigned long imraddr;
u32 val, imrbit;
irq -= MCFINT_VECBASE;
#ifdef MCFICM_INTC1
imraddr = (irq & 0x40) ? MCFICM_INTC1 : MCFICM_INTC0;
imraddr = (irq & 0x40) ? MCFICM_INTC1 : MCFICM_INTC0;
#else
imraddr = MCFICM_INTC0;
imraddr = MCFICM_INTC0;
#endif
imraddr += (irq & 0x20) ? MCFINTC_IMRH : MCFINTC_IMRL;
imrbit = 0x1 << (irq & 0x1f);
imraddr += (irq & 0x20) ? MCFINTC_IMRH : MCFINTC_IMRL;
imrbit = 0x1 << (irq & 0x1f);
val = __raw_readl(imraddr);
__raw_writel(val | imrbit, imraddr);
}
val = __raw_readl(imraddr);
__raw_writel(val | imrbit, imraddr);
}
static void intc_irq_unmask(struct irq_data *d)
{
unsigned int irq = d->irq;
unsigned int irq = d->irq - MCFINT_VECBASE;
unsigned long intaddr, imraddr, icraddr;
u32 val, imrbit;
if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECBASE + NR_VECS)) {
unsigned long intaddr, imraddr, icraddr;
u32 val, imrbit;
irq -= MCFINT_VECBASE;
#ifdef MCFICM_INTC1
intaddr = (irq & 0x40) ? MCFICM_INTC1 : MCFICM_INTC0;
intaddr = (irq & 0x40) ? MCFICM_INTC1 : MCFICM_INTC0;
#else
intaddr = MCFICM_INTC0;
intaddr = MCFICM_INTC0;
#endif
imraddr = intaddr + ((irq & 0x20) ? MCFINTC_IMRH : MCFINTC_IMRL);
icraddr = intaddr + MCFINTC_ICR0 + (irq & 0x3f);
imrbit = 0x1 << (irq & 0x1f);
imraddr = intaddr + ((irq & 0x20) ? MCFINTC_IMRH : MCFINTC_IMRL);
icraddr = intaddr + MCFINTC_ICR0 + (irq & 0x3f);
imrbit = 0x1 << (irq & 0x1f);
/* Don't set the "maskall" bit! */
if ((irq & 0x20) == 0)
imrbit |= 0x1;
/* Don't set the "maskall" bit! */
if ((irq & 0x20) == 0)
imrbit |= 0x1;
if (__raw_readb(icraddr) == 0)
__raw_writeb(intc_intpri--, icraddr);
if (__raw_readb(icraddr) == 0)
__raw_writeb(intc_intpri--, icraddr);
val = __raw_readl(imraddr);
__raw_writel(val & ~imrbit, imraddr);
}
val = __raw_readl(imraddr);
__raw_writel(val & ~imrbit, imraddr);
}
static int intc_irq_set_type(struct irq_data *d, unsigned int type)
@ -119,7 +111,7 @@ void __init init_IRQ(void)
__raw_writel(0x1, MCFICM_INTC1 + MCFINTC_IMRL);
#endif
for (irq = 0; (irq < NR_IRQS); irq++) {
for (irq = MCFINT_VECBASE; (irq < MCFINT_VECBASE + NR_VECS); irq++) {
set_irq_chip(irq, &intc_irq_chip);
set_irq_type(irq, IRQ_TYPE_LEVEL_HIGH);
set_irq_handler(irq, handle_level_irq);