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| author | phk <phk@FreeBSD.org> | 2005-09-24 19:31:10 +0000 |
|---|---|---|
| committer | phk <phk@FreeBSD.org> | 2005-09-24 19:31:10 +0000 |
| commit | 538e3ae81de8e4fe6309c209a04c7d4ec476af05 (patch) | |
| tree | 5047301813f00a3e55ef4b7ae370fb910aa7f2d8 /sys/sys/rman.h | |
| parent | c5182c8c5e1c2a2cb2ff0730db77198b5c832ebc (diff) | |
| download | FreeBSD-src-538e3ae81de8e4fe6309c209a04c7d4ec476af05.zip FreeBSD-src-538e3ae81de8e4fe6309c209a04c7d4ec476af05.tar.gz | |
Add two convenience functions for device drivers: bus_alloc_resources()
and bus_free_resources(). These functions take a list of resources
and handle them all in one go. A flag makes it possible to mark
a resource as optional.
A typical device driver can save 10-30 lines of code by using these.
Usage examples will follow RSN.
MFC: A good idea, eventually.
Diffstat (limited to 'sys/sys/rman.h')
| -rw-r--r-- | sys/sys/rman.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/sys/rman.h b/sys/sys/rman.h index c043e80..857a5c8 100644 --- a/sys/sys/rman.h +++ b/sys/sys/rman.h @@ -46,6 +46,7 @@ #define RF_WANTED 0x0010 /* somebody is waiting for this resource */ #define RF_FIRSTSHARE 0x0020 /* first in sharing list */ #define RF_PREFETCHABLE 0x0040 /* resource is prefetchable */ +#define RF_OPTIONAL 0x0080 /* for bus_alloc_resources() */ #define RF_ALIGNMENT_SHIFT 10 /* alignment size bit starts bit 10 */ #define RF_ALIGNMENT_MASK (0x003F << RF_ALIGNMENT_SHIFT) |
