diff options
Diffstat (limited to 'sys/xen/evtchn')
-rw-r--r-- | sys/xen/evtchn/evtchn.c | 59 |
1 files changed, 47 insertions, 12 deletions
diff --git a/sys/xen/evtchn/evtchn.c b/sys/xen/evtchn/evtchn.c index 155b38e..b28315c 100644 --- a/sys/xen/evtchn/evtchn.c +++ b/sys/xen/evtchn/evtchn.c @@ -101,18 +101,48 @@ enum { IRQT_VIRQ, IRQT_IPI, IRQT_LOCAL_PORT, - IRQT_CALLER_PORT + IRQT_CALLER_PORT, + _IRQT_COUNT + }; + +#define _IRQT_BITS 4 +#define _EVTCHN_BITS 12 +#define _INDEX_BITS (32 - _IRQT_BITS - _EVTCHN_BITS) + +/* Constructor for packed IRQ information. */ +static inline uint32_t +mk_irq_info(uint32_t type, uint32_t index, uint32_t evtchn) +{ + + return ((type << (32 - _IRQT_BITS)) | (index << _EVTCHN_BITS) | evtchn); +} + /* Constructor for packed IRQ information. */ -#define mk_irq_info(type, index, evtchn) \ - (((uint32_t)(type) << 24) | ((uint32_t)(index) << 16) | (uint32_t)(evtchn)) + /* Convenient shorthand for packed representation of an unbound IRQ. */ #define IRQ_UNBOUND mk_irq_info(IRQT_UNBOUND, 0, 0) -/* Accessor macros for packed IRQ information. */ -#define evtchn_from_irq(irq) ((uint16_t)(irq_info[irq])) -#define index_from_irq(irq) ((uint8_t)(irq_info[irq] >> 16)) -#define type_from_irq(irq) ((uint8_t)(irq_info[irq] >> 24)) + +/* + * Accessors for packed IRQ information. + */ + +static inline unsigned int evtchn_from_irq(int irq) +{ + return irq_info[irq] & ((1U << _EVTCHN_BITS) - 1); +} + +static inline unsigned int index_from_irq(int irq) +{ + return (irq_info[irq] >> _EVTCHN_BITS) & ((1U << _INDEX_BITS) - 1); +} + +static inline unsigned int type_from_irq(int irq) +{ + return irq_info[irq] >> (32 - _IRQT_BITS); +} + /* IRQ <-> VIRQ mapping. */ @@ -132,9 +162,9 @@ static int irq_bindcount[NR_IRQS]; #define VALID_EVTCHN(_chn) ((_chn) != 0) -#ifdef CONFIG_SMP +#ifdef SMP -static u8 cpu_evtchn[NR_EVENT_CHANNELS]; +static uint8_t cpu_evtchn[NR_EVENT_CHANNELS]; static unsigned long cpu_evtchn_mask[NR_CPUS][NR_EVENT_CHANNELS/BITS_PER_LONG]; #define active_evtchns(cpu,sh,idx) \ @@ -228,7 +258,6 @@ ipi_pcpu(unsigned int cpu, int vector) int irq; irq = per_cpu(ipi_to_irq, cpu)[vector]; - irq = (pcpu_find((cpu))->pc_ipi_to_irq)[vector]; notify_remote_via_irq(irq); } @@ -362,7 +391,10 @@ out: return irq; } -static int + +extern int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu); + +int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) { struct evtchn_bind_ipi bind_ipi; @@ -1047,7 +1079,10 @@ evtchn_init(void *dummy __unused) int i, cpu; struct xenpic_intsrc *pin, *tpin; - /* No VIRQ or IPI bindings. */ + + init_evtchn_cpu_bindings(); + + /* No VIRQ or IPI bindings. */ for (cpu = 0; cpu < mp_ncpus; cpu++) { for (i = 0; i < NR_VIRQS; i++) per_cpu(virq_to_irq, cpu)[i] = -1; |