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authorMichael Ellerman <michael@ellerman.id.au>2007-05-08 04:58:37 +0200
committerPaul Mackerras <paulus@samba.org>2007-05-08 05:46:48 +0200
commit05af7bd2d75e5098021864d83fbb831111755fa0 (patch)
treec5319ce0410fdf732679175fa5a4df25cbb0e830 /arch/powerpc/sysdev/mpic.h
parent[POWERPC] MPIC MSI allocator (diff)
downloadlinux-05af7bd2d75e5098021864d83fbb831111755fa0.tar.xz
linux-05af7bd2d75e5098021864d83fbb831111755fa0.zip
[POWERPC] MPIC U3/U4 MSI backend
MPIC U3/U4 MSI backend. Based on code from Segher, heavily hacked by me. This only deals with MSI on U3/U4 MPICs, aka. CPC 9x5. If we find a U3/U4 then we enable this backend, ie. take over the ppc_md MSI hooks. We might need more elaborate logic in future to decide which backend is enabled. We need our own irq_chip so that we can do MSI masking/unmasking on the device itself. We also need to mask explicitly on shutdown to make sure we don't get bitten by lazy-disable semantics. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/sysdev/mpic.h')
-rw-r--r--arch/powerpc/sysdev/mpic.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/mpic.h b/arch/powerpc/sysdev/mpic.h
index 87cb2aea2fb4..3a1c3d2c594d 100644
--- a/arch/powerpc/sysdev/mpic.h
+++ b/arch/powerpc/sysdev/mpic.h
@@ -16,12 +16,23 @@ extern void mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq);
extern int mpic_msi_init_allocator(struct mpic *mpic);
extern irq_hw_number_t mpic_msi_alloc_hwirqs(struct mpic *mpic, int num);
extern void mpic_msi_free_hwirqs(struct mpic *mpic, int offset, int num);
+extern int mpic_u3msi_init(struct mpic *mpic);
#else
static inline void mpic_msi_reserve_hwirq(struct mpic *mpic,
irq_hw_number_t hwirq)
{
return;
}
+
+static inline int mpic_u3msi_init(struct mpic *mpic)
+{
+ return -1;
+}
#endif
+extern int mpic_set_irq_type(unsigned int virq, unsigned int flow_type);
+extern void mpic_end_irq(unsigned int irq);
+extern void mpic_mask_irq(unsigned int irq);
+extern void mpic_unmask_irq(unsigned int irq);
+
#endif /* _POWERPC_SYSDEV_MPIC_H */