diff options
Diffstat (limited to 'arch/mips/mti-malta')
| -rw-r--r-- | arch/mips/mti-malta/malta-int.c | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/arch/mips/mti-malta/malta-int.c b/arch/mips/mti-malta/malta-int.c index c6b35482505d..bcab0b197e9f 100644 --- a/arch/mips/mti-malta/malta-int.c +++ b/arch/mips/mti-malta/malta-int.c @@ -190,92 +190,6 @@ static irqreturn_t corehi_handler(int irq, void *dev_id) return IRQ_HANDLED; } -static inline int clz(unsigned long x) -{ - __asm__( - " .set push \n" - " .set mips32 \n" - " clz %0, %1 \n" - " .set pop \n" - : "=r" (x) - : "r" (x)); - - return x; -} - -/* - * Version of ffs that only looks at bits 12..15. - */ -static inline unsigned int irq_ffs(unsigned int pending) -{ -#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64) - return -clz(pending) + 31 - CAUSEB_IP; -#else - unsigned int a0 = 7; - unsigned int t0; - - t0 = pending & 0xf000; - t0 = t0 < 1; - t0 = t0 << 2; - a0 = a0 - t0; - pending = pending << t0; - - t0 = pending & 0xc000; - t0 = t0 < 1; - t0 = t0 << 1; - a0 = a0 - t0; - pending = pending << t0; - - t0 = pending & 0x8000; - t0 = t0 < 1; - /* t0 = t0 << 2; */ - a0 = a0 - t0; - /* pending = pending << t0; */ - - return a0; -#endif -} - -/* - * IRQs on the Malta board look basically (barring software IRQs which we - * don't use at all and all external interrupt sources are combined together - * on hardware interrupt 0 (MIPS IRQ 2)) like: - * - * MIPS IRQ Source - * -------- ------ - * 0 Software (ignored) - * 1 Software (ignored) - * 2 Combined hardware interrupt (hw0) - * 3 Hardware (ignored) - * 4 Hardware (ignored) - * 5 Hardware (ignored) - * 6 Hardware (ignored) - * 7 R4k timer (what we use) - * - * We handle the IRQ according to _our_ priority which is: - * - * Highest ---- R4k Timer - * Lowest ---- Combined hardware interrupt - * - * then we just return, if multiple IRQs are pending then we will just take - * another exception, big deal. - */ - -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM; - int irq; - - if (unlikely(!pending)) { - spurious_interrupt(); - return; - } - - irq = irq_ffs(pending); - - do_IRQ(MIPS_CPU_IRQ_BASE + irq); -} - #ifdef CONFIG_MIPS_MT_SMP #define MIPS_CPU_IPI_RESCHED_IRQ 0 /* SW int 0 for resched */ @@ -438,12 +352,6 @@ void __init arch_init_irq(void) cpu_ipi_resched_irq = MSC01E_INT_SW0; cpu_ipi_call_irq = MSC01E_INT_SW1; } else { - if (cpu_has_vint) { - set_vi_handler (MIPS_CPU_IPI_RESCHED_IRQ, - ipi_resched_dispatch); - set_vi_handler (MIPS_CPU_IPI_CALL_IRQ, - ipi_call_dispatch); - } cpu_ipi_resched_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ; cpu_ipi_call_irq = MIPS_CPU_IRQ_BASE + |