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| author | Michael Ellerman <michael@ellerman.id.au> | 2007-05-08 06:58:37 +0400 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2007-05-08 07:46:48 +0400 |
| commit | 05af7bd2d75e5098021864d83fbb831111755fa0 (patch) | |
| tree | c5319ce0410fdf732679175fa5a4df25cbb0e830 /arch/powerpc/sysdev/mpic.h | |
| parent | a7de7c74227edda719b257eb15aecd73790ff894 (diff) | |
| download | linux-05af7bd2d75e5098021864d83fbb831111755fa0.tar.xz | |
[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.h | 11 |
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 */ |