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05af7bd2d7
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>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
#ifndef _POWERPC_SYSDEV_MPIC_H
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#define _POWERPC_SYSDEV_MPIC_H
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/*
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* Copyright 2006-2007, Michael Ellerman, IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; version 2 of the
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* License.
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*
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*/
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#ifdef CONFIG_PCI_MSI
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extern void mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq);
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extern int mpic_msi_init_allocator(struct mpic *mpic);
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extern irq_hw_number_t mpic_msi_alloc_hwirqs(struct mpic *mpic, int num);
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extern void mpic_msi_free_hwirqs(struct mpic *mpic, int offset, int num);
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extern int mpic_u3msi_init(struct mpic *mpic);
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#else
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static inline void mpic_msi_reserve_hwirq(struct mpic *mpic,
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irq_hw_number_t hwirq)
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{
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return;
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}
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static inline int mpic_u3msi_init(struct mpic *mpic)
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{
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return -1;
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}
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#endif
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extern int mpic_set_irq_type(unsigned int virq, unsigned int flow_type);
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extern void mpic_end_irq(unsigned int irq);
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extern void mpic_mask_irq(unsigned int irq);
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extern void mpic_unmask_irq(unsigned int irq);
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#endif /* _POWERPC_SYSDEV_MPIC_H */
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