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TODO revision 1.26 
      1 $NetBSD: TODO,v 1.26 2008/02/02 15:39:49 tsutsui Exp $
      2 
      3 To do list (in some particular order)
      4 XXX some entries might be obsolete.
      5 
      6     o	install notes
      7 
      8 
      9     o	use MI driver
     10 
     11 	-   make fd driver MI, and share it with other ports
     12 	    (contact christos about MI fd driver)
     13 
     14 	-   use MI bha driver instead of home grown btl
     15 	    XXX needs fixes of DESKstation support
     16 
     17     o	VXL framebuffer support (Magnum, RISCstation 2200)
     18 
     19     o	com_jazzio.c
     20 	-   clock handling clean up (obtain from ARC BIOS)
     21 	-   fifo disabling may be only needed on some Magnum?
     22 
     23     o	remove pccons and switch to wscons completely
     24 	(XXX what's the problem to remove pccons?)
     25 
     26     o	AD1848 audio support
     27 
     28     o	missing MI devices
     29 		ses?, vcoda, ...
     30 
     31 
     32     o	Xserver
     33 
     34 	-   VXL		Magnum, RISCstation 2200
     35 	-   vga/S3	PICA, Image RISCstation - OpenBSD's?
     36 	-   vga/cirrus	RISCserver 2200, Express5800/240 R4400 EISA
     37 	-   vga/???	DESKstation Tyne, rPC44
     38 	-   TGA		RISCstation 2250, Express5800/230 R4400 PCI
     39 
     40     o   Find out why bitmap load to S3-928 flashes screen. (X server)
     41 	Know why (enable linear mode). Need S3 info.
     42 
     43 
     44     o	repair DESKstation support
     45 	-   requires bounce buffer bus_dma for Tyne
     46 		XXX - too small bounce buffer size (128KB)
     47 
     48     o	Olivetti M700 support
     49 
     50     o	NEC Express5800/230 R10000 PCI (NEC-J95) support
     51 	(needs MI R10000 support)
     52 
     53     o	SNI RM200PCI/RM300/RM400/RM600 support
     54 
     55 
     56     o	parse ARC BIOS configuration information and use it
     57 
     58     o	increase MAXPHYS to 64KB
     59 	(XXX why is it limited to 32KB?)
     60 
     61     o	fix kernel start address
     62 	(maybe requires bootloader support)
     63 
     64     o	allocate PICA_TL_BASE dynamically
     65 
     66     o	remove inb/outb
     67 
     68     o	remove UADDR
     69 
     70     o	fix mem_clusters[] usage.
     71 
     72     o	intrcnt[] name cleanup, use MI evcnt(9)
     73 
     74     o	test and merge soren's clean up about proc0.p_addr.
     75 
     76     o	redesign interrupt handler framework.
     77 	i/o bus devices should have sane IPL, but currently doesn't.
     78 
     79     o	make CLKF_INTR() work.
     80 
     81     o	it is better to always disable the MIPS3 internal timer interrupts
     82 	(i.e. MIPS_INT_MASK_5) if it is not needed for the system.
     83 	those are the points which should be fixed:
     84 	mips_idle: li t0, (MIPS_INT_MASK | MIPS_SR_INT_IE)
     85 	machdep.c: curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE;
     86 	spl0()
     87 	splnone()
     88 
     89     o	XXX at least 2000/06/07 version is already quite unstable
     90 	on PICA and NEC Image RISCstation. (but almost OK on Magnum)
     91 	Userland commands dumps	core randomly.
     92 	This version is before _MIPS_PADDR_T_64BIT changes
     93 	and MIPS3_TLB_WIRED_UPAGES changes.	
     94 
     95 	"vm_page_zero_enable = FALSE" makes this problem disappeared.
     96 	(vm_page_zero_enable = FALSE by default on all archs w/ UBC, now)
     97 
     98 	currently, page zero in the idle loop is also disabled on
     99 	untested platforms like DESKstation rPC44/Tyne and SNI for safety.
    100 
    101 	    XXX what's the current status of uvm_pageidlezero()?
    102 
    103 
    104     o	resolve "XXX"
    105 
    106 
    107 (following entries might be MI MIPS items)
    108 
    109     o	Move the RO and WIRED attribute from the pte to the pv table.
    110 	This saves four instructions in the tlb miss handler.
    111 
    112     o   Can we have 32 double registers?
    113 
    114     o	64bit kernel/userland
    115 
    116     o	omit __SWAP_BROKEN in <mips/types.h>
    117 
    118     o	clean up ALEAF/NLEAF/NON_LEAF/NNON_LEAF in userland.
    119 
    120 Lots of other things.....
    121