diff options
| author | Greg Ungerer <gerg@uclinux.org> | 2011-03-07 10:21:43 +0300 |
|---|---|---|
| committer | Greg Ungerer <gerg@uclinux.org> | 2011-03-15 14:01:55 +0300 |
| commit | 49bc6deace5a0a774678212097474b27b27e44fb (patch) | |
| tree | ea1f1bd5406881d7af6b7e59505b2943a76ad049 /arch/m68knommu/platform/coldfire | |
| parent | 7badfabb3fcee4fc4a0fd7c0437706b91fef3fff (diff) | |
| download | linux-49bc6deace5a0a774678212097474b27b27e44fb.tar.xz | |
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>
Diffstat (limited to 'arch/m68knommu/platform/coldfire')
| -rw-r--r-- | arch/m68knommu/platform/coldfire/intc-2.c | 58 |
1 files changed, 25 insertions, 33 deletions
diff --git a/arch/m68knommu/platform/coldfire/intc-2.c b/arch/m68knommu/platform/coldfire/intc-2.c index ec869c8e8890..4d172a7a6fbc 100644 --- a/arch/m68knommu/platform/coldfire/intc-2.c +++ b/arch/m68knommu/platform/coldfire/intc-2.c @@ -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); |