Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (47 commits)
  [MAINTAINERS] The ham radio code now has website at http://www.linux-ax25.org.
  [MIPS] Use __ffs() instead of ffs() for waybit calculation.
  [MIPS] Fix Makefile bugs for MIPS32/MIPS64 R1 and R2.
  [MIPS] Handle IDE PIO cache aliases on SMP.
  [MIPS] Make mips_srs_init static.
  [MIPS] MIPS boards: Set HZ to 100.
  [MIPS] kgdb: Let gcc compute the array size itself.
  [MIPS] FPU affinity for MT ASE.
  [MIPS] MT: Improved multithreading support.
  [MIPS] kpsd and other AP/SP improvements.
  [MIPS] R2: Instruction hazard barrier.
  [MIPS] Fix genrtc compilation.
  [MIPS] R2: Implement shadow register allocation without spinlock.
  [MIPS] Fix VR41xx build errors.
  [MIPS] Fix tx49_blast_icache32_page_indexed.
  [MIPS] Enable SCHED_NO_NO_OMIT_FRAME_POINTER for MIPS.
  [MIPS] Use "R" constraint for cache_op.
  [MIPS] Rewrite all the assembler interrupt handlers to C.
  [MIPS] Fix the crime against humanity that mipsIRQ.S is.
  [MIPS] Fixup damage done by 22a9835c350782a5c3257343713932af3ac92ee0.
  ...

1 files changed, 118 insertions, 0 deletions

diff --git a/include/asm-mips/smtc_ipi.h b/include/asm-mips/smtc_ipi.h
new file mode 100644
index 000000000000..f22c3e2f993a
--- /dev/null
+++ b/include/asm-mips/smtc_ipi.h
@@ -0,0 +1,118 @@
+/*
+ * Definitions used in MIPS MT SMTC "Interprocessor Interrupt" code.
+ */
+#ifndef __ASM_SMTC_IPI_H
+#define __ASM_SMTC_IPI_H
+
+//#define SMTC_IPI_DEBUG
+
+#ifdef SMTC_IPI_DEBUG
+#include <asm/mipsregs.h>
+#include <asm/mipsmtregs.h>
+#endif /* SMTC_IPI_DEBUG */
+
+/*
+ * An IPI "message"
+ */
+
+struct smtc_ipi {
+	struct smtc_ipi *flink;
+	int type;
+	void *arg;
+	int dest;
+#ifdef	SMTC_IPI_DEBUG
+	int sender;
+	long stamp;
+#endif /* SMTC_IPI_DEBUG */
+};
+
+/*
+ * Defined IPI Types
+ */
+
+#define LINUX_SMP_IPI 1
+#define SMTC_CLOCK_TICK 2
+
+/*
+ * A queue of IPI messages
+ */
+
+struct smtc_ipi_q {
+	struct smtc_ipi *head;
+	spinlock_t lock;
+	struct smtc_ipi *tail;
+	int depth;
+};
+
+extern struct smtc_ipi_q IPIQ[NR_CPUS];
+extern struct smtc_ipi_q freeIPIq;
+
+static inline void smtc_ipi_nq(struct smtc_ipi_q *q, struct smtc_ipi *p)
+{
+	long flags;
+
+	spin_lock_irqsave(&q->lock, flags);
+	if (q->head == NULL)
+		q->head = q->tail = p;
+	else
+		q->tail->flink = p;
+	p->flink = NULL;
+	q->tail = p;
+	q->depth++;
+#ifdef	SMTC_IPI_DEBUG
+	p->sender = read_c0_tcbind();
+	p->stamp = read_c0_count();
+#endif /* SMTC_IPI_DEBUG */
+	spin_unlock_irqrestore(&q->lock, flags);
+}
+
+static inline struct smtc_ipi *smtc_ipi_dq(struct smtc_ipi_q *q)
+{
+	struct smtc_ipi *p;
+	long flags;
+
+	spin_lock_irqsave(&q->lock, flags);
+	if (q->head == NULL)
+		p = NULL;
+	else {
+		p = q->head;
+		q->head = q->head->flink;
+		q->depth--;
+		/* Arguably unnecessary, but leaves queue cleaner */
+		if (q->head == NULL)
+			q->tail = NULL;
+	}
+	spin_unlock_irqrestore(&q->lock, flags);
+	return p;
+}
+
+static inline void smtc_ipi_req(struct smtc_ipi_q *q, struct smtc_ipi *p)
+{
+	long flags;
+
+	spin_lock_irqsave(&q->lock, flags);
+	if (q->head == NULL) {
+		q->head = q->tail = p;
+		p->flink = NULL;
+	} else {
+		p->flink = q->head;
+		q->head = p;
+	}
+	q->depth++;
+	spin_unlock_irqrestore(&q->lock, flags);
+}
+
+static inline int smtc_ipi_qdepth(struct smtc_ipi_q *q)
+{
+	long flags;
+	int retval;
+
+	spin_lock_irqsave(&q->lock, flags);
+	retval = q->depth;
+	spin_unlock_irqrestore(&q->lock, flags);
+	return retval;
+}
+
+extern void smtc_send_ipi(int cpu, int type, unsigned int action);
+
+#endif /* __ASM_SMTC_IPI_H */