From 05af7bd2d75e5098021864d83fbb831111755fa0 Mon Sep 17 00:00:00 2001 From: Michael Ellerman Date: Tue, 8 May 2007 12:58:37 +1000 Subject: [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 Signed-off-by: Paul Mackerras --- arch/powerpc/sysdev/mpic.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/powerpc/sysdev/mpic.h') 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 */ -- cgit v1.2.3