| 1 | --- a/arch/mips/kernel/traps.c |
| 2 | +++ b/arch/mips/kernel/traps.c |
| 3 | @@ -1537,7 +1537,16 @@ void __cpuinit per_cpu_trap_init(void) |
| 4 | */ |
| 5 | if (cpu_has_mips_r2) { |
| 6 | cp0_compare_irq = (read_c0_intctl() >> 29) & 7; |
| 7 | + if (!cp0_compare_irq) |
| 8 | + cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ; |
| 9 | + |
| 10 | cp0_perfcount_irq = (read_c0_intctl() >> 26) & 7; |
| 11 | + if (!cp0_perfcount_irq) |
| 12 | + cp0_perfcount_irq = CP0_LEGACY_PERFCNT_IRQ; |
| 13 | + |
| 14 | + if (arch_fixup_c0_irqs) |
| 15 | + arch_fixup_c0_irqs(); |
| 16 | + |
| 17 | if (cp0_perfcount_irq == cp0_compare_irq) |
| 18 | cp0_perfcount_irq = -1; |
| 19 | } else { |
| 20 | --- a/arch/mips/include/asm/irq.h |
| 21 | +++ b/arch/mips/include/asm/irq.h |
| 22 | @@ -158,8 +158,10 @@ extern void free_irqno(unsigned int irq) |
| 23 | * IE7. Since R2 their number has to be read from the c0_intctl register. |
| 24 | */ |
| 25 | #define CP0_LEGACY_COMPARE_IRQ 7 |
| 26 | +#define CP0_LEGACY_PERFCNT_IRQ 7 |
| 27 | |
| 28 | extern int cp0_compare_irq; |
| 29 | extern int cp0_perfcount_irq; |
| 30 | +extern void __weak arch_fixup_c0_irqs(void); |
| 31 | |
| 32 | #endif /* _ASM_IRQ_H */ |
| 33 | |
