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ec150c7e09
Back in 2016, we discussed[1] rules for headers, and these were
generally liked:
1. Have a carefully curated header that's included everywhere first. We
got that already thanks to Peter: osdep.h.
2. Headers should normally include everything they need beyond osdep.h.
If exceptions are needed for some reason, they must be documented in
the header. If all that's needed from a header is typedefs, put
those into qemu/typedefs.h instead of including the header.
3. Cyclic inclusion is forbidden.
This patch gets include/ closer to obeying 2.
It's actually extracted from my "[RFC] Baby steps towards saner
headers" series[2], which demonstrates a possible path towards
checking 2 automatically. It passes the RFC test there.
[1] Message-ID: <87h9g8j57d.fsf@blackfin.pond.sub.org>
https://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg03345.html
[2] Message-Id: <20190711122827.18970-1-armbru@redhat.com>
https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg02715.html
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20190812052359.30071-2-armbru@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* Copyright (C) 2011 Citrix Ltd.
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef XEN_MAPCACHE_H
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#define XEN_MAPCACHE_H
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#include "exec/cpu-common.h"
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typedef hwaddr (*phys_offset_to_gaddr_t)(hwaddr phys_offset,
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ram_addr_t size);
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#ifdef CONFIG_XEN
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void xen_map_cache_init(phys_offset_to_gaddr_t f,
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void *opaque);
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uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
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uint8_t lock, bool dma);
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ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
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void xen_invalidate_map_cache_entry(uint8_t *buffer);
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void xen_invalidate_map_cache(void);
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uint8_t *xen_replace_cache_entry(hwaddr old_phys_addr,
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hwaddr new_phys_addr,
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hwaddr size);
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#else
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static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
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void *opaque)
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{
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}
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static inline uint8_t *xen_map_cache(hwaddr phys_addr,
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hwaddr size,
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uint8_t lock,
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bool dma)
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{
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abort();
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}
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static inline ram_addr_t xen_ram_addr_from_mapcache(void *ptr)
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{
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abort();
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}
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static inline void xen_invalidate_map_cache_entry(uint8_t *buffer)
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{
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}
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static inline void xen_invalidate_map_cache(void)
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{
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}
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static inline uint8_t *xen_replace_cache_entry(hwaddr old_phys_addr,
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hwaddr new_phys_addr,
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hwaddr size)
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{
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abort();
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}
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#endif
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#endif /* XEN_MAPCACHE_H */
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