diff options
| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2011-08-10 12:48:29 +0200 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2011-11-08 22:35:50 +0100 |
| commit | 9145db564eae98134de8eb8d64b47d7177eccfdd (patch) | |
| tree | 7d0e25514abba33b6082f5a13963442cf390a058 /arch/m68k/mac/baboon.c | |
| parent | ddc7fd25d09678f8252c0321ef4b66e8451abe7d (diff) | |
m68k/mac: Optimize interrupts using chain handlers
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/mac/baboon.c')
| -rw-r--r-- | arch/m68k/mac/baboon.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/m68k/mac/baboon.c b/arch/m68k/mac/baboon.c index ff11746b062..425144cbfa7 100644 --- a/arch/m68k/mac/baboon.c +++ b/arch/m68k/mac/baboon.c @@ -56,6 +56,39 @@ void __init baboon_init(void) * Baboon interrupt handler. This works a lot like a VIA. */ +#ifdef CONFIG_GENERIC_HARDIRQS +static void baboon_irq(unsigned int irq, struct irq_desc *desc) +{ + int irq_bit, irq_num; + unsigned char events; + +#ifdef DEBUG_IRQS + printk("baboon_irq: mb_control %02X mb_ifr %02X mb_status %02X\n", + (uint) baboon->mb_control, (uint) baboon->mb_ifr, + (uint) baboon->mb_status); +#endif + + events = baboon->mb_ifr & 0x07; + if (!events) + return; + + irq_num = IRQ_BABOON_0; + irq_bit = 1; + do { + if (events & irq_bit) { + baboon->mb_ifr &= ~irq_bit; + generic_handle_irq(irq_num); + } + irq_bit <<= 1; + irq_num++; + } while(events >= irq_bit); +#if 0 + if (baboon->mb_ifr & 0x02) macide_ack_intr(NULL); + /* for now we need to smash all interrupts */ + baboon->mb_ifr &= ~events; +#endif +} +#else static irqreturn_t baboon_irq(int irq, void *dev_id) { int irq_bit, irq_num; @@ -87,6 +120,7 @@ static irqreturn_t baboon_irq(int irq, void *dev_id) #endif return IRQ_HANDLED; } +#endif /* * Register the Baboon interrupt dispatcher on nubus slot $C. @@ -95,8 +129,12 @@ static irqreturn_t baboon_irq(int irq, void *dev_id) void __init baboon_register_interrupts(void) { baboon_disabled = 0; +#ifdef CONFIG_GENERIC_HARDIRQS + irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq); +#else if (request_irq(IRQ_NUBUS_C, baboon_irq, 0, "baboon", (void *)baboon)) pr_err("Couldn't register baboon interrupt\n"); +#endif } /* |