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irq handling code consolidation (i386)

RFC New Andrey Panin 1 participant 4 messages Dec 24, 2002 Alpha port

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Andrey Panin

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#0 lore raw

RFC 1/1 irq handling code consolidation (i386)

i386 specific patch attached.

Signature · 2 lines
Andrey Panin		| Embedded systems software developer
[email protected]	| PGP key: wwwkeys.pgp.net
arch/i386/Kconfig +4 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/arch/i386/Kconfig linux-2.5.52/arch/i386/Kconfig
@@ -22,6 +22,10 @@
 	bool
 	default y
 
+config GENERIC_IRQ
+	bool
+	default y
+
 config SBUS
 	bool
arch/i386/kernel/irq.c +0 -370

391 lines not on this page · raw message

include/asm-i386/hw_irq.h +17 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/include/asm-i386/hw_irq.h linux-2.5.52/include/asm-i386/hw_irq.h
@@ -140,4 +140,21 @@
 static inline void hw_resend_irq(struct hw_interrupt_type *h, unsigned int i) {}
 #endif
 
+/*
+ * Currently unexpected vectors happen only on SMP and APIC.
+ * We _must_ ack these because every local APIC has only N
+ * irq slots per priority level, and a 'hanging, unacked' IRQ
+ * holds up an irq slot - in excessive cases (when multiple
+ * unexpected vectors occur) that might lock up the APIC
+ * completely.
+ */
+#ifdef CONFIG_X86_LOCAL_APIC
+#define ack_bad_irq(irq) ack_APIC_irq()
+#else
+#define ack_bad_irq(irq) do { } while (0)
+#endif
+
+/* Return a pointer to the irq descriptor for IRQ.  */
+#define irq_desc(irq) (irq_desc + (irq))
+
 #endif /* _ASM_HW_IRQ_H */
author
#1 lore raw

RFC 1/1 irq handling code consolidation (v850)

v850 specific patch attached. Not compiled, not tested.

Signature · 2 lines
Andrey Panin		| Embedded systems software developer
[email protected]	| PGP key: wwwkeys.pgp.net
arch/v850/Kconfig +4 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/arch/v850/Kconfig linux-2.5.52/arch/v850/Kconfig
@@ -23,6 +23,10 @@
 	bool
 	default n
 
+config CONFIG_GENERIC_IRQ
+	bool
+	default y
+
 # Turn off some random 386 crap that can affect device config
 config ISA
 	bool
arch/v850/kernel/irq.c +1 -347

367 lines not on this page · raw message

include/asm-v850/hw_irq.h +5 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/include/asm-v850/hw_irq.h linux-2.5.52/include/asm-v850/hw_irq.h
@@ -5,4 +5,9 @@
 {
 }
 
+#define ack_bad_irq(irq)
+
+/* Return a pointer to the irq descriptor for IRQ.  */
+#define irq_desc(irq) (irq_desc + (irq))
+
 #endif /* __V850_HW_IRQ_H__ */
author
#2 lore raw

RFC 1/1 irq handling code consolidation (x86_64)

In reply to Andrey Panin

x86_64 specific patch attached. Not tested, not compiled.

Signature · 2 lines
Andrey Panin		| Embedded systems software developer
[email protected]	| PGP key: wwwkeys.pgp.net
arch/x86_64/Kconfig +4 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/arch/x86_64/Kconfig linux-2.5.52/arch/x86_64/Kconfig
@@ -25,6 +25,10 @@
 	  486, 586, Pentiums, and various instruction-set-compatible chips by
 	  AMD, Cyrix, and others.
 
+config GENERIC_IRQ
+	bool
+	default y
+
 config MMU
 	bool
 	default y
arch/x86_64/kernel/irq.c +0 -370

391 lines not on this page · raw message

include/asm-x86_64/hw_irq.h +17 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/include/asm-x86_64/hw_irq.h linux-2.5.52/include/asm-x86_64/hw_irq.h
@@ -182,4 +182,21 @@
 
 #endif
 
+/*
+ * Currently unexpected vectors happen only on SMP and APIC.
+ * We _must_ ack these because every local APIC has only N
+ * irq slots per priority level, and a 'hanging, unacked' IRQ
+ * holds up an irq slot - in excessive cases (when multiple
+ * unexpected vectors occur) that might lock up the APIC
+ * completely.
+ */
+#ifdef CONFIG_X86_LOCAL_APIC
+#define ack_bad_irq(irq) ack_APIC_irq()
+#else
+#define ack_bad_irq(irq) do { } while (0)
+#endif
+
+/* Return a pointer to the irq descriptor for IRQ.  */
+#define irq_desc(irq) (irq_desc + (irq))
+
 #endif /* _ASM_HW_IRQ_H */
author
#3 lore raw

RFC 1/1 irq handling code consolidation (alpha)

In reply to Andrey Panin

alpha specific patch attached. Not tested, not compiled.

Signature · 2 lines
Andrey Panin		| Embedded systems software developer
[email protected]	| PGP key: wwwkeys.pgp.net
arch/alpha/Kconfig +4 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/arch/alpha/Kconfig linux-2.5.52/arch/alpha/Kconfig
@@ -20,6 +20,10 @@
 	bool
 	default y
 
+config GENERIC_IRQ
+	bool
+	default y
+
 config UID16
 	bool
arch/alpha/kernel/irq.c +0 -281

293 lines not on this page · raw message

include/asm-alpha/hw_irq.h +5 -0
diff --minimal -urN -X /usr/share/dontdiff linux-2.5.52.vanilla/include/asm-alpha/hw_irq.h linux-2.5.52/include/asm-alpha/hw_irq.h
@@ -13,4 +13,9 @@
 #define ACTUAL_NR_IRQS	NR_IRQS
 #endif
 
+#define ack_bad_irq(irq)
+
+/* Return a pointer to the irq descriptor for IRQ.  */
+#define irq_desc(irq) (irq_desc + (irq))
+
 #endif