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authorRalf Baechle <ralf@linux-mips.org>2007-09-21 17:13:55 +0100
committerRalf Baechle <ralf@linux-mips.org>2007-09-24 18:13:02 +0100
commit1146fe30504a1edd8a434f500e1be139492570c9 (patch)
treeba6dec916c23506580be7a5756dd583105da41ba /include/asm-mips/irq.h
parent7bae705ef2c2daac1993de03e5be93b5c300fc5e (diff)
[MIPS] SMTC: Make ack_bad_irq() safe with no IM backstop.
Issue reported and original patch by Kevin Kissel, cleaner (imho) implementation by me. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/irq.h')
-rw-r--r--include/asm-mips/irq.h32
1 files changed, 24 insertions, 8 deletions
diff --git a/include/asm-mips/irq.h b/include/asm-mips/irq.h
index 97102ebc54b..2cb52cf8bd4 100644
--- a/include/asm-mips/irq.h
+++ b/include/asm-mips/irq.h
@@ -24,7 +24,30 @@ static inline int irq_canonicalize(int irq)
#define irq_canonicalize(irq) (irq) /* Sane hardware, sane code ... */
#endif
+#ifdef CONFIG_MIPS_MT_SMTC
+
+struct irqaction;
+
+extern unsigned long irq_hwmask[];
+extern int setup_irq_smtc(unsigned int irq, struct irqaction * new,
+ unsigned long hwmask);
+
+static inline void smtc_im_ack_irq(unsigned int irq)
+{
+ if (irq_hwmask[irq] & ST0_IM)
+ set_c0_status(irq_hwmask[irq] & ST0_IM);
+}
+
+#else
+
+static inline void smtc_im_ack_irq(unsigned int irq)
+{
+}
+
+#endif /* CONFIG_MIPS_MT_SMTC */
+
#ifdef CONFIG_MIPS_MT_SMTC_IM_BACKSTOP
+
/*
* Clear interrupt mask handling "backstop" if irq_hwmask
* entry so indicates. This implies that the ack() or end()
@@ -38,6 +61,7 @@ do { \
~(irq_hwmask[irq] & 0x0000ff00)); \
} while (0)
#else
+
#define __DO_IRQ_SMTC_HOOK(irq) do { } while (0)
#endif
@@ -60,14 +84,6 @@ do { \
extern void arch_init_irq(void);
extern void spurious_interrupt(void);
-#ifdef CONFIG_MIPS_MT_SMTC
-struct irqaction;
-
-extern unsigned long irq_hwmask[];
-extern int setup_irq_smtc(unsigned int irq, struct irqaction * new,
- unsigned long hwmask);
-#endif /* CONFIG_MIPS_MT_SMTC */
-
extern int allocate_irqno(void);
extern void alloc_legacy_irqno(void);
extern void free_irqno(unsigned int irq);