diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-04-12 22:30:30 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2015-04-12 22:30:30 +0200 |
| commit | 461c2b68a16ab3314202ec7796fe7eb8a7731f2d (patch) | |
| tree | d2fd155f08d5dff13b6b600db5151da233842347 /sys/src/9/port/portdat.h | |
| parent | aadbcf0a32c92b1ba4584ad9487854ede43932ca (diff) | |
kernel: fixed segment support (for fpga experiments)
fixed segments are continuous in physical memory but
allocated in user pages. unlike shared segments, they
are not allocated on demand but the pages are allocated
on creation time (devsegment). fixed segments are
never swapped out, segfreed or resized and can only be
destroyed as a whole.
the physical base address can be discovered by userspace
reading the ctl file in devsegment.
Diffstat (limited to 'sys/src/9/port/portdat.h')
| -rw-r--r-- | sys/src/9/port/portdat.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/src/9/port/portdat.h b/sys/src/9/port/portdat.h index a85dc831b..495baac93 100644 --- a/sys/src/9/port/portdat.h +++ b/sys/src/9/port/portdat.h @@ -341,6 +341,7 @@ enum SG_STACK = 03, SG_SHARED = 04, SG_PHYSICAL = 05, + SG_FIXED = 06, SG_RONLY = 0040, /* Segment is read only */ SG_CEXEC = 0100, /* Detach at exec */ |