Commit Graph

22 Commits

Author SHA1 Message Date
drochner f8a6b48d66 Don't silently truncate the voff_t offset to vaddr_t when passing it to
udv_attach. Pass the whole voff_t instead and do an explicite overflow
check before it is passed to the device's mmap handler (as "int", sadly).
2000-05-28 10:21:55 +00:00
chs 03a4ef3a79 remove the "shareprot" pagerop. it's not needed anymore since
share maps are long gone.
2000-04-03 07:35:23 +00:00
kleink 6e5b64c8a0 Merge parts of chs-ubc2 into the trunk:
Add a new type voff_t (defined as a synonym for off_t) to describe offsets
into uvm objects, and update the appropriate interfaces to use it, the
most visible effect being the ability to mmap() file offsets beyond
the range of a vaddr_t.

Originally by Chuck Silvers; blame me for problems caused by merging this
into non-UBC.
2000-03-26 20:54:45 +00:00
kleink 08025fbc20 Kill duplicate udv_attach() prototype; it's a public interface, and declared
in uvm_device.h.
2000-03-26 20:46:59 +00:00
thorpej 1da427a80a Change the pmap_enter() API slightly; pmap_enter() now returns an error
value (KERN_SUCCESS or KERN_RESOURCE_SHORTAGE) indicating if it succeeded
or failed.  Change the `wired' and `access_type' arguments to a single
`flags' argument, which includes the access type, and flags:

	PMAP_WIRED	the old `wired' boolean
	PMAP_CANFAIL	pmap_enter() is allowed to fail

If PMAP_CANFAIL is not specified, the pmap should behave as it always
has in the face of a drastic resource shortage: fall over dead.

Change the fault handler to deal with failure (which indicates resource
shortage) by unlocking everything, waiting for the pagedaemon to free
more memory, then retrying the fault.
1999-11-13 00:24:38 +00:00
ross 0f2e70dfa4 Patch from chuq for uvm r/w map oscillation bug.
Fixes the XalphaNetBSD slowdown.
1999-10-24 16:29:23 +00:00
drochner 3d6e675ba8 sanity: use ';' to separate statements 1999-04-08 10:26:21 +00:00
mycroft 31a2536cd0 Add a new `access type' argument to pmap_enter(). This indicates what type of
memory access a mapping was caused by.  This is passed through from uvm_fault()
and udv_fault(), and in most other cases is 0.
The pmap module may use this to preset R/M information.  On MMUs which require
R/M emulation, the implementation may preset the bits and avoid taking another
fault.  On MMUs which keep R/M information in hardware, the implementation may
preset its cached bits to speed up the next call to pmap_is_modified() or
pmap_is_referenced().
1999-03-26 21:58:39 +00:00
mrg a0139bc39d remove now >1 year old pre-release message. 1999-03-25 18:48:49 +00:00
cgd 9639d2bb98 modify udv_attach() and its caller (uvm_mmap()) so that it's passed the
offset and size of the requested region to be mapped, so that the
udv_attach() can use the device d_mmap() entry to check mappability
of the requested region.
1999-03-24 03:52:41 +00:00
cgd 37c88c58da after discussion with chuck, nuke pgo_attach from uvm_pagerops 1999-03-24 03:45:27 +00:00
mrg d39ed4e552 check the return value of d_mmap before pmap_phys_address() gets hold of it. 1998-11-19 05:23:26 +00:00
chuck 8ffef382dd remove unused share map code from UVM:
- udv_fault() no longer has to worry about share map address translations
	on device faults.  simplify code.
1998-10-11 23:02:31 +00:00
eeh a2dd74ed79 Merge paddr_t changes into the main branch. 1998-08-13 02:10:37 +00:00
kleink 182e12f413 Remove inclusions of syscall (and syscall argument) related header files;
we don't need them here.
1998-05-05 20:51:04 +00:00
mrg 8106d13596 KNF. 1998-03-09 00:58:55 +00:00
fvdl e5bc90f40c Merge with Lite2 + local changes 1998-03-01 02:20:01 +00:00
mrg d90485202c - add defopt's for UVM, UVMHIST and PMAP_NEW.
- remove unnecessary UVMHIST_DECL's.
1998-02-10 14:08:44 +00:00
mrg 1f6b921cf7 restore rcsids 1998-02-07 11:07:38 +00:00
chs 7cb9f7e5b1 rearrange a bit for clarity. 1998-02-07 02:18:27 +00:00
thorpej 9eb328b495 RCS ID police. 1998-02-06 22:26:13 +00:00
mrg f2caacc717 initial import of the new virtual memory system, UVM, into -current.
UVM was written by chuck cranor <chuck@maria.wustl.edu>, with some
minor portions derived from the old Mach code.  i provided some help
getting swap and paging working, and other bug fixes/ideas.  chuck
silvers <chuq@chuq.com> also provided some other fixes.

this is the UVM kernel code portion.


this will be KNF'd shortly.  :-)
1998-02-05 06:25:08 +00:00