235 lines
8.2 KiB
Plaintext
235 lines
8.2 KiB
Plaintext
THINGS TO BE DONE: (NetBSD/Sun3 version) <$Revision: 1.3 $>
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This is a list of things that need to be done for NetBSD/Sun3. Some
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of these tasks are small, others are large. Some are extremely
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critical, others would be useful to do, and some are fluff. Included
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in each description, is a notation of its importance. Please note
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however that this is a list of things to do above and beyond fixing
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bugs in the existing code base.
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In general there are some guidelines for work to be included in
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NetBSD. Chief among these are:
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(1) Keep GPLed stuff out of the kernel.
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(2) Only clean code, that lends itself to further enhancement
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(3) Keep architecture dependent code out of architecture independent
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directories
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The important part of this is that the sun3 stuff better stay in
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sys/arch/sun3.
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Bootstrapping:
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make it easy to do nfs diskless (CRITICAL). currently you have to
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hack up the nfs_diskless sturcture. this should be fixed by finishing
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porting sys/lib/libnetboot.
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native boot blocks (HIGH)
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nfs diskless boot blocks (HIGH).
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Kernel core tasks (arch/sun3/sun3):
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make pmap module modifications necessary so that we can turn
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on MACHINE_NONCONTIG,a kernel config option that allows for
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non-contiguous physical memory. This work is necessitated by the
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the frame buffer on the 3/50 which is plop in the middle of physical
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ram. (CRITICAL)
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kernel text is not protected. (CRITICAL..for debugging)
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find out why kernel has to be linked with such wierd options. (HIGH)
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test virtual addressed cache support on non-desktop machines. (HIGH)
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need support for the sun eeprom, including a non-sun
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copyrighted header file describing its structure. Needed
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at least for console handling. (MEDIUM)
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ddb support (MEDIUM) (mycroft is working on this, for 68ks in general,
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and it may actually work some now)
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locore.s got split into many pieces as part of a bit of research
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by the author into how much of it was truly sun-dependent vs
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68k-dependent. Needs to be re-integrated into a standard
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locore.s so that we can benefit from changes to the hp300, and
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amiga ports, and vice-versa. (MEDIUM, will be fixed by glass)
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FPUCOPROC support needs to be better integrated and triggered
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by something other than this awful define. Also need
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FPU emulation code (see briggs). (MEDIUM)
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msgbuf should be allocated later, using the pmap stuff, same with
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high_segment crud. see the dvma_alloc code for an example of
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how much cleaner this is. (LOW..it works now)
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compute idprom checksum, and check it (was lazy) (LOW)
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HPUX compatibility support (make it hang off p_emul like our
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COMPAT_SUNOS support). (LOW)
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pmap module should keep a 3-level cache of ptes instead of 2. (LOW)
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need /dev/eeprom driver functionality added to mem.c (LOW)
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support for sun3x architecture (LOW, but we have the 030 code)
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Device-driver related tasks:
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scsi driver - use the scsi infrastructure in sys/scsi.
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See config-file component in sys/arch/i386/conf
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For host-adapter driver examples look
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in sys/arch/{386/isa,mac68k/dev}
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host adapter chip is NCR 5380.
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dma chip is amd 9516.
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secondary sources in: mac port, sprite, mach3
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(SUPER_DUPER_CRITICAL)
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prom console can accept input, though it does so lamely
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make zs, ms, kbd driver as incorporated from torek's code actually
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work. Then re-engineer such that it isn't so ugly. (CRITICAL)
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intel ether - driver for 'ie' intel 82586-based ethernet.
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see mach3, sprite, and i386 port (CRITICAL)
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VME support (CRITICAL)
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console handling (choice, detection, etc.) (MEDIUM)
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OBIO probe support needed. support for handling the traps is
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already present in the form of pcb_onfault. (MEDIUM)
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Better OBIO configuration architecture, less re-computation of
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default parameters. device-conflict notification. Requires
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mycroft's autoconfig fix. (MEDIUM)
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bw?, cg*,fb - must have same external interface as sun's to
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keep X happy.
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see sparc, and sprite code. (MEDIUM)
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lance - switch to sparc code as a base instead of hp300. (LOW)
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THINGS TO BE DONE: (NetBSD/Sun3 version) <$Revision: 1.3 $>
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This is a list of things that need to be done for NetBSD/Sun3. Some
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of these tasks are small, others are large. Some are extremely
|
|
critical, others would be useful to do, and some are fluff. Included
|
|
in each description, is a notation of its importance. Please note
|
|
however that this is a list of things to do above and beyond fixing
|
|
bugs in the existing code base.
|
|
|
|
In general there are some guidelines for work to be included in
|
|
NetBSD. Chief among these are:
|
|
|
|
(1) Keep GPLed stuff out of the kernel.
|
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(2) Only clean code, that lends itself to further enhancement
|
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(3) Keep architecture dependent code out of architecture independent
|
|
directories
|
|
|
|
The important part of this is that the sun3 stuff better stay in
|
|
sys/arch/sun3.
|
|
|
|
Bootstrapping:
|
|
|
|
make it easy to do nfs diskless (CRITICAL). currently you have to
|
|
hack up the nfs_diskless sturcture. this should be fixed by finishing
|
|
porting sys/lib/libnetboot.
|
|
|
|
native boot blocks (HIGH)
|
|
|
|
nfs diskless boot blocks (HIGH).
|
|
|
|
Kernel core tasks (arch/sun3/sun3):
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|
|
|
make pmap module modifications necessary so that we can turn
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|
on MACHINE_NONCONTIG,a kernel config option that allows for
|
|
non-contiguous physical memory. This work is necessitated by the
|
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the frame buffer on the 3/50 which is plop in the middle of physical
|
|
ram. (CRITICAL)
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|
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all the FPUCOPROC support is untested and from the hp300 port.
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It needs to be better integrated and triggered by something other
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than this awful define. Also need FPU emulation code. (CRITICAL)
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|
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kernel text is not protected. (CRITICAL..for debugging)
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|
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find out why kernel has to be linked with such wierd options. (HIGH)
|
|
|
|
test virtual addressed cache support on non-desktop machines. (HIGH)
|
|
|
|
need support for the sun eeprom, including a non-sun
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copyrighted header file describing its structure. Needed
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|
at least for console handling. (MEDIUM)
|
|
|
|
ddb support (MEDIUM) (mycroft is working on this, for 68ks in general,
|
|
and it may actually work some now)
|
|
|
|
add some debugging facilities to the pmap module. (MEDIUM)
|
|
|
|
locore.s got split into many pieces as part of a bit of research
|
|
by the author into how much of it was truly sun-dependent vs
|
|
68k-dependent. Needs to be re-integrated into a standard
|
|
locore.s so that we can benefit from changes to the hp300, and
|
|
amiga ports, and vice-versa. (MEDIUM, will be fixed by glass)
|
|
|
|
msgbuf should be allocated later, using the pmap stuff, same with
|
|
high_segment crud. see the dvma_alloc code for an example of
|
|
how much cleaner this is. (LOW..it works now)
|
|
|
|
compute idprom checksum, and check it (was lazy) (LOW)
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|
|
|
HPUX compatibility support (make it hang off p_emul like our
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COMPAT_SUNOS support). (LOW)
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|
|
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pmap module should keep a 3-level cache of ptes instead of 2. (LOW)
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|
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need /dev/eeprom driver functionality added to mem.c (LOW)
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|
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support for sun3x architecture (LOW, but we have the 030 code)
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|
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Device-driver related tasks:
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|
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scsi driver - use the scsi infrastructure in sys/scsi.
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See config-file component in sys/arch/i386/conf
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For host-adapter driver examples look
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in sys/arch/{386/isa,mac68k/dev}
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host adapter chip is NCR 5380.
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dma chip is amd 9516.
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secondary sources in: mac port, sprite, mach3
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(SUPER_DUPER_CRITICAL)
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prom console currently can't accept input (CRITICAL)
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intel ether - driver for 'ie' intel 82586-based ethernet.
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see mach3, sprite, and i386 port (CRITICAL)
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VME support (CRITICAL)
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kbd - must have same external interface as sun's kbd driver in order
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to keep X happy. see sprite code, maybe sparc port.
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(HIGH)
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zs driver - Zilog 8530 duart (MEDIUM)
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sources: sparc port, mach3, sprite
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console handling (choice, detection, etc.) (MEDIUM)
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OBIO probe support needed. support for handling the traps is
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already present in the form of pcb_onfault. (MEDIUM)
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|
|
|
Better OBIO configuration architecture, less re-computation of
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default parameters. device-conflict notification. Requires
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mycroft's autoconfig fix. (MEDIUM)
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mouse - must have same external interface as sun's mouse
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driver in order to keep X happy. see supplied sprite
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+ sparc code. (MEDIUM)
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bw?, cg*,fb - must have same external interface as sun's to
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keep X happy.
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see sparc, and sprite code. (MEDIUM)
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lance - switch to sparc code as a base instead of hp300. (LOW)
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