2 * Definitions used in MIPS MT SMTC "Interprocessor Interrupt" code.
4 #ifndef __ASM_SMTC_IPI_H
5 #define __ASM_SMTC_IPI_H
7 #include <linux/spinlock.h>
9 //#define SMTC_IPI_DEBUG
12 #include <asm/mipsregs.h>
13 #include <asm/mipsmtregs.h>
14 #endif /* SMTC_IPI_DEBUG */
21 struct smtc_ipi *flink;
28 #endif /* SMTC_IPI_DEBUG */
35 #define LINUX_SMP_IPI 1
36 #define SMTC_CLOCK_TICK 2
37 #define IRQ_AFFINITY_IPI 3
40 * A queue of IPI messages
44 struct smtc_ipi *head;
46 struct smtc_ipi *tail;
48 int resched_flag; /* reschedule already queued */
51 static inline void smtc_ipi_nq(struct smtc_ipi_q *q, struct smtc_ipi *p)
55 spin_lock_irqsave(&q->lock, flags);
57 q->head = q->tail = p;
64 p->sender = read_c0_tcbind();
65 p->stamp = read_c0_count();
66 #endif /* SMTC_IPI_DEBUG */
67 spin_unlock_irqrestore(&q->lock, flags);
70 static inline struct smtc_ipi *__smtc_ipi_dq(struct smtc_ipi_q *q)
78 q->head = q->head->flink;
80 /* Arguably unnecessary, but leaves queue cleaner */
88 static inline struct smtc_ipi *smtc_ipi_dq(struct smtc_ipi_q *q)
93 spin_lock_irqsave(&q->lock, flags);
95 spin_unlock_irqrestore(&q->lock, flags);
100 static inline void smtc_ipi_req(struct smtc_ipi_q *q, struct smtc_ipi *p)
104 spin_lock_irqsave(&q->lock, flags);
105 if (q->head == NULL) {
106 q->head = q->tail = p;
113 spin_unlock_irqrestore(&q->lock, flags);
116 static inline int smtc_ipi_qdepth(struct smtc_ipi_q *q)
121 spin_lock_irqsave(&q->lock, flags);
123 spin_unlock_irqrestore(&q->lock, flags);
127 extern void smtc_send_ipi(int cpu, int type, unsigned int action);
129 #endif /* __ASM_SMTC_IPI_H */