From 00047bcc15091f3ce64315e289ba2fccafefd15e Mon Sep 17 00:00:00 2001
From: "Martin J. Bligh" <mbligh@aracnet.com>
Date: Sun, 22 Dec 2002 18:19:53 -0800
Subject: [PATCH] cleanup IPI code

Reformat the IPI stuff, specifically send_IPI_mask, send_IPI_allbutself,
and send_IPI_all.  Though the way they work is pretty silly for NUMA-Q,
I do an equivalent transform here, and fix the code in a seperate patch
(next one).  Goes into mach_ipi.h
---
 include/asm-i386/mach-default/mach_ipi.h | 30 ++++++++++++++++++++++++
 include/asm-i386/mach-numaq/mach_ipi.h   | 39 ++++++++++++++++++++++++++++++++
 include/asm-i386/mach-summit/mach_ipi.h  | 39 ++++++++++++++++++++++++++++++++
 3 files changed, 108 insertions(+)
 create mode 100644 include/asm-i386/mach-default/mach_ipi.h
 create mode 100644 include/asm-i386/mach-numaq/mach_ipi.h
 create mode 100644 include/asm-i386/mach-summit/mach_ipi.h

(limited to 'include')

diff --git a/include/asm-i386/mach-default/mach_ipi.h b/include/asm-i386/mach-default/mach_ipi.h
new file mode 100644
index 000000000000..481692a7b885
--- /dev/null
+++ b/include/asm-i386/mach-default/mach_ipi.h
@@ -0,0 +1,30 @@
+#ifndef __ASM_MACH_IPI_H
+#define __ASM_MACH_IPI_H
+
+static inline void send_IPI_mask_bitmask(int mask, int vector);
+static inline void __send_IPI_shortcut(unsigned int shortcut, int vector);
+
+static inline void send_IPI_mask(int mask, int vector)
+{
+	send_IPI_mask_bitmask(mask, vector);
+}
+
+static inline void send_IPI_allbutself(int vector)
+{
+	/*
+	 * if there are no other CPUs in the system then we get an APIC send 
+	 * error if we try to broadcast, thus avoid sending IPIs in this case.
+	 */
+	if (!(num_online_cpus() > 1))
+		return;
+
+	__send_IPI_shortcut(APIC_DEST_ALLBUT, vector);
+	return;
+}
+
+static inline void send_IPI_all(int vector)
+{
+	__send_IPI_shortcut(APIC_DEST_ALLINC, vector);
+}
+
+#endif /* __ASM_MACH_IPI_H */
diff --git a/include/asm-i386/mach-numaq/mach_ipi.h b/include/asm-i386/mach-numaq/mach_ipi.h
new file mode 100644
index 000000000000..382f337d1fdc
--- /dev/null
+++ b/include/asm-i386/mach-numaq/mach_ipi.h
@@ -0,0 +1,39 @@
+#ifndef __ASM_MACH_IPI_H
+#define __ASM_MACH_IPI_H
+
+static inline void send_IPI_mask_sequence(int mask, int vector);
+
+static inline void send_IPI_mask(int mask, int vector)
+{
+	send_IPI_mask_sequence(mask, vector);
+}
+
+static inline void send_IPI_allbutself(int vector)
+{
+	int cpu;
+	/*
+	 * if there are no other CPUs in the system then we get an APIC send 
+	 * error if we try to broadcast, thus avoid sending IPIs in this case.
+	 */
+	if (!(num_online_cpus() > 1))
+		return;
+
+	/* Pointless. Use send_IPI_mask to do this instead */
+	for (cpu = 0; cpu < NR_CPUS; ++cpu)
+		if (cpu_online(cpu) && cpu != smp_processor_id())
+			send_IPI_mask(1 << cpu, vector);
+
+	return;
+}
+
+static inline void send_IPI_all(int vector)
+{
+	int cpu;
+
+	/* Pointless. Use send_IPI_mask to do this instead */
+	for (cpu = 0; cpu < NR_CPUS; ++cpu)
+		if (cpu_online(cpu))
+			send_IPI_mask(1 << cpu, vector);
+}
+
+#endif /* __ASM_MACH_IPI_H */
diff --git a/include/asm-i386/mach-summit/mach_ipi.h b/include/asm-i386/mach-summit/mach_ipi.h
new file mode 100644
index 000000000000..382f337d1fdc
--- /dev/null
+++ b/include/asm-i386/mach-summit/mach_ipi.h
@@ -0,0 +1,39 @@
+#ifndef __ASM_MACH_IPI_H
+#define __ASM_MACH_IPI_H
+
+static inline void send_IPI_mask_sequence(int mask, int vector);
+
+static inline void send_IPI_mask(int mask, int vector)
+{
+	send_IPI_mask_sequence(mask, vector);
+}
+
+static inline void send_IPI_allbutself(int vector)
+{
+	int cpu;
+	/*
+	 * if there are no other CPUs in the system then we get an APIC send 
+	 * error if we try to broadcast, thus avoid sending IPIs in this case.
+	 */
+	if (!(num_online_cpus() > 1))
+		return;
+
+	/* Pointless. Use send_IPI_mask to do this instead */
+	for (cpu = 0; cpu < NR_CPUS; ++cpu)
+		if (cpu_online(cpu) && cpu != smp_processor_id())
+			send_IPI_mask(1 << cpu, vector);
+
+	return;
+}
+
+static inline void send_IPI_all(int vector)
+{
+	int cpu;
+
+	/* Pointless. Use send_IPI_mask to do this instead */
+	for (cpu = 0; cpu < NR_CPUS; ++cpu)
+		if (cpu_online(cpu))
+			send_IPI_mask(1 << cpu, vector);
+}
+
+#endif /* __ASM_MACH_IPI_H */
-- 
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