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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - include/asm-mips/smtc_ipi.h
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
39 * A queue of IPI messages
43 struct smtc_ipi
*head
;
45 struct smtc_ipi
*tail
;
49 static inline void smtc_ipi_nq(struct smtc_ipi_q
*q
, struct smtc_ipi
*p
)
53 spin_lock_irqsave(&q
->lock
, flags
);
55 q
->head
= q
->tail
= p
;
62 p
->sender
= read_c0_tcbind();
63 p
->stamp
= read_c0_count();
64 #endif /* SMTC_IPI_DEBUG */
65 spin_unlock_irqrestore(&q
->lock
, flags
);
68 static inline struct smtc_ipi
*__smtc_ipi_dq(struct smtc_ipi_q
*q
)
76 q
->head
= q
->head
->flink
;
78 /* Arguably unnecessary, but leaves queue cleaner */
86 static inline struct smtc_ipi
*smtc_ipi_dq(struct smtc_ipi_q
*q
)
91 spin_lock_irqsave(&q
->lock
, flags
);
93 spin_unlock_irqrestore(&q
->lock
, flags
);
98 static inline void smtc_ipi_req(struct smtc_ipi_q
*q
, struct smtc_ipi
*p
)
102 spin_lock_irqsave(&q
->lock
, flags
);
103 if (q
->head
== NULL
) {
104 q
->head
= q
->tail
= p
;
111 spin_unlock_irqrestore(&q
->lock
, flags
);
114 static inline int smtc_ipi_qdepth(struct smtc_ipi_q
*q
)
119 spin_lock_irqsave(&q
->lock
, flags
);
121 spin_unlock_irqrestore(&q
->lock
, flags
);
125 extern void smtc_send_ipi(int cpu
, int type
, unsigned int action
);
127 #endif /* __ASM_SMTC_IPI_H */