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Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/sysdev/mpc8xx_pic.c61
1 files changed, 20 insertions, 41 deletions
diff --git a/arch/powerpc/sysdev/mpc8xx_pic.c b/arch/powerpc/sysdev/mpc8xx_pic.c
index d5f5416be310..b724622c3a0b 100644
--- a/arch/powerpc/sysdev/mpc8xx_pic.c
+++ b/arch/powerpc/sysdev/mpc8xx_pic.c
@@ -18,69 +18,45 @@
extern int cpm_get_irq(struct pt_regs *regs);
static struct irq_domain *mpc8xx_pic_host;
-#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
-static unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
+static unsigned long mpc8xx_cached_irq_mask;
static sysconf8xx_t __iomem *siu_reg;
-int cpm_get_irq(struct pt_regs *regs);
+static inline unsigned long mpc8xx_irqd_to_bit(struct irq_data *d)
+{
+ return 0x80000000 >> irqd_to_hwirq(d);
+}
static void mpc8xx_unmask_irq(struct irq_data *d)
{
- int bit, word;
- unsigned int irq_nr = (unsigned int)irqd_to_hwirq(d);
-
- bit = irq_nr & 0x1f;
- word = irq_nr >> 5;
-
- ppc_cached_irq_mask[word] |= (1 << (31-bit));
- out_be32(&siu_reg->sc_simask, ppc_cached_irq_mask[word]);
+ mpc8xx_cached_irq_mask |= mpc8xx_irqd_to_bit(d);
+ out_be32(&siu_reg->sc_simask, mpc8xx_cached_irq_mask);
}
static void mpc8xx_mask_irq(struct irq_data *d)
{
- int bit, word;
- unsigned int irq_nr = (unsigned int)irqd_to_hwirq(d);
-
- bit = irq_nr & 0x1f;
- word = irq_nr >> 5;
-
- ppc_cached_irq_mask[word] &= ~(1 << (31-bit));
- out_be32(&siu_reg->sc_simask, ppc_cached_irq_mask[word]);
+ mpc8xx_cached_irq_mask &= ~mpc8xx_irqd_to_bit(d);
+ out_be32(&siu_reg->sc_simask, mpc8xx_cached_irq_mask);
}
static void mpc8xx_ack(struct irq_data *d)
{
- int bit;
- unsigned int irq_nr = (unsigned int)irqd_to_hwirq(d);
-
- bit = irq_nr & 0x1f;
- out_be32(&siu_reg->sc_sipend, 1 << (31-bit));
+ out_be32(&siu_reg->sc_sipend, mpc8xx_irqd_to_bit(d));
}
static void mpc8xx_end_irq(struct irq_data *d)
{
- int bit, word;
- unsigned int irq_nr = (unsigned int)irqd_to_hwirq(d);
-
- bit = irq_nr & 0x1f;
- word = irq_nr >> 5;
-
- ppc_cached_irq_mask[word] |= (1 << (31-bit));
- out_be32(&siu_reg->sc_simask, ppc_cached_irq_mask[word]);
+ mpc8xx_cached_irq_mask |= mpc8xx_irqd_to_bit(d);
+ out_be32(&siu_reg->sc_simask, mpc8xx_cached_irq_mask);
}
static int mpc8xx_set_irq_type(struct irq_data *d, unsigned int flow_type)
{
- if (flow_type & IRQ_TYPE_EDGE_FALLING) {
- irq_hw_number_t hw = (unsigned int)irqd_to_hwirq(d);
+ /* only external IRQ senses are programmable */
+ if ((flow_type & IRQ_TYPE_EDGE_FALLING) && !(irqd_to_hwirq(d) & 1)) {
unsigned int siel = in_be32(&siu_reg->sc_siel);
-
- /* only external IRQ senses are programmable */
- if ((hw & 1) == 0) {
- siel |= (0x80000000 >> hw);
- out_be32(&siu_reg->sc_siel, siel);
- __irq_set_handler_locked(d->irq, handle_edge_irq);
- }
+ siel |= mpc8xx_irqd_to_bit(d);
+ out_be32(&siu_reg->sc_siel, siel);
+ __irq_set_handler_locked(d->irq, handle_edge_irq);
}
return 0;
}
@@ -132,6 +108,9 @@ static int mpc8xx_pic_host_xlate(struct irq_domain *h, struct device_node *ct,
IRQ_TYPE_EDGE_FALLING,
};
+ if (intspec[0] > 0x1f)
+ return 0;
+
*out_hwirq = intspec[0];
if (intsize > 1 && intspec[1] < 4)
*out_flags = map_pic_senses[intspec[1]];