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      1 $NetBSD: TODO,v 1.31 2019/04/07 03:49:24 rin Exp $
      2 
      3 To do list (in some particular order)
      4 XXX some entries might be obsolete.
      5 
      6     o	use MI driver
      7 
      8 	-   make fd driver MI, and share it with other ports
      9 	    (contact christos about MI fd driver)
     10 
     11 	-   use MI bha driver instead of home grown btl
     12 	    XXX needs fixes of DESKstation support
     13 
     14     o	VXL framebuffer support (Magnum, RISCstation 2200)
     15 	(Note nowadays QEMU supports Magnum 4000 with VXL)
     16 
     17     o	com_jazzio.c
     18 	-   clock handling clean up (obtain from ARC BIOS)
     19 	-   fifo disabling may be only needed on some Magnum?
     20 
     21     o	AD1848 audio support
     22 
     23     o	missing MI devices
     24 		ses?, vcoda, ...
     25 
     26 
     27     o	Xserver
     28 
     29 	-   VXL		Magnum, RISCstation 2200
     30 	-   vga/S3	PICA, Image RISCstation - OpenBSD's?
     31 	-   vga/cirrus	RISCserver 2200, Express5800/240 R4400 EISA
     32 	-   vga/???	DESKstation Tyne, rPC44
     33 	-   TGA		RISCstation 2250, Express5800/230 R4400 PCI
     34 			(TGA support in XalphaNetBSD just works,
     35 			 but needs XOrg'fy)
     36 
     37     o   Find out why bitmap load to S3-928 flashes screen. (X server)
     38 	Know why (enable linear mode). Need S3 info.
     39 
     40 
     41     o	repair DescStation support
     42 	-   requires bounce buffer bus_dma for Tyne
     43 		XXX - too small bounce buffer size (128KB)
     44 
     45     o	Olivetti M700 support
     46 
     47     o	NEC Express5800/230 R10000 PCI (NEC-J95) support
     48 	(needs info about interrupt, jazzio device address etc.)
     49 
     50     o	SNI RM200PCI/RM300/RM400/RM600 support
     51 	(Linux/MIPS seems to have some info)
     52 
     53 
     54     o	parse ARC BIOS configuration information and use it
     55 
     56     o	fix kernel start address
     57 
     58     o	allocate PICA_TL_BASE dynamically
     59 
     60     o	remove inb/outb
     61 
     62     o	fix mem_clusters[] usage.
     63 
     64     o	redesign interrupt handler framework.
     65 
     66     o	it is better to always disable the MIPS3 internal timer interrupts
     67 	(i.e. MIPS_INT_MASK_5) if it is not needed for the system.
     68 	those are the points which should be fixed:
     69 	mips_idle: li t0, (MIPS_INT_MASK | MIPS_SR_INT_IE)
     70 	machdep.c: curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE;
     71 	spl0()
     72 	splnone()
     73 
     74     o	XXX at least 2000/06/07 version is already quite unstable
     75 	on PICA and NEC Image RISCstation. (but almost OK on Magnum)
     76 	Userland commands dumps	core randomly.
     77 	This version is before _MIPS_PADDR_T_64BIT changes
     78 	and MIPS3_TLB_WIRED_UPAGES changes.	
     79 
     80 	"vm_page_zero_enable = FALSE" makes this problem disappeared.
     81 	(vm_page_zero_enable = FALSE by default on all archs w/ UBC, now)
     82 
     83 	currently, page zero in the idle loop is also disabled on
     84 	untested platforms like DESKstation rPC44/Tyne and SNI for safety.
     85 
     86 	    XXX what's the current status of uvm_pageidlezero()?
     87 
     88 
     89     o	resolve "XXX"
     90 
     91 
     92 (following entries might be MI MIPS items)
     93 
     94     o	Move the RO and WIRED attribute from the pte to the pv table.
     95 	This saves four instructions in the tlb miss handler.
     96 
     97     o	clean up ALEAF/NLEAF/NON_LEAF/NNON_LEAF in userland.
     98 
     99 Lots of other things.....
    100