request (not always the passed in DMA tag if we try direct-map
and then fall back to sgmap-mapped). Use the actual window
when performing dmamap_sync and dmamap_unload operations.
Fixes DMA resource leak on systems with 2G+ RAM. Thanks to
Matt Thomas for help debugging this.
configuration of devices logically attached to the ISA bus:
* Change the isa_attach_args to have arrays of io, mem, irq, drq
resources.
* Add a "pnpnames" and a linked list of "pnpcompatnames" to the
isa_attach_args. If either of these members are non-NULL,
direct configuration of the bus is being performed. Add an
ISA_DIRECT_CONFIG() macro to test for this.
* Drivers are not allowed to modify the isa_attach_args unless
direct configuration is not being performed and the probe fucntion
is returning success.
* Adapt device drivers -- currently, all driver probe routines return
"no match" if ISA_DIRECT_CONFIG() evaluates to true.
timeout()/untimeout() API:
- Clients supply callout handle storage, thus eliminating problems of
resource allocation.
- Insertion and removal of callouts is constant time, important as
this facility is used quite a lot in the kernel.
The old timeout()/untimeout() API has been removed from the kernel.
a struct device * corresponding to the ISA bus device. The ISA DMA
controller driver functions have been renamed and now take a struct
isa_dma_state *, and are called indirectly by machine-dependent code
which provides the DMA state.
These changes allow e.g. `ofisa' (the OpenFirmware configuration
mechanism for the ISA bus, used by e.g. Sharks) to use the MI ISA
DMA controller code.
>date: 1997/07/18 00:26:22; author: fvdl; state: Exp; lines: +10 -10
>Work around possible race condition with 2 drives on one controller
>in wd_get_parms. PR 3773, from Onno van der Linden (onno@simplex.nl)
S: ----------------------------------------------------------------------
It is configured (in config files) as 'awdc'/'awd', but shows up as
'wdc'/'wd', so that a minimal amount of code had to be modified to make
the name change work. This is only intended to be temporary, anyway.
This can be disabled (to save a bit of space) with the NO_KERNEL_RCSIDS
options, which is present but commented out in the ALPHA config file.
In ELF-format kernels, these strings are present in the kernel binary but
are not loaded into memory. (In ECOFF-format kernels, there's no easy way
to keep them from being loaded, so they _are_ loaded into memory.)
thorpej